Patent Application
20230270494
The present invention belongs to the field of medical instruments, and specifically, to a treatment apparatus for an endoscope and an expandable frame.
There are so far known bipolar treatment instruments for an endoscope that are passed through endoscopes to treat living tissue and the like. Some of the bipolar treatment instruments for an endoscope have, for example, a function of supplying a high-frequency current to a treatment instrument to perform treatments such as incision, cauterization, and hemostasis on living tissue.
As an example of such a treatment instrument for an endoscope, a high-frequency incision instrument that uses a polypectomy snare supplied with a high-frequency current to incise living tissue is recorded in Patent CN102413786B. An electric wire, a passive electrode arranged on a periphery of an extending part, living tissue in contact with the passive electrode, the polypectomy snare, and an operating wire are connected to a feeding electrode to form a current loop to excise a polyp. In addition, a bipolar sphincterotome is recorded in Patent CN205697995U and includes a control part, an insulating sheath, and a cutting part. A distal end of the control part is connected to a proximal end of the insulating sheath. The cutting part includes a cutting electrode, a passive electrode, a cutting electrode wiring terminal that may be connected to the cutting electrode, a passive electrode wiring terminal that may be connected to the passive electrode, a cutting electrode conductor connecting the cutting electrode and the cutting electrode wiring terminal, and a passive electrode conductor connecting the passive electrode and the passive electrode wiring terminal. The cutting electrode and the passive electrode are provided on a distal end of the insulating sheath and are respectively connected to the control part through the cutting electrode conductor and the passive electrode conductor.
However, both the foregoing technical solutions can be improved. First, an active electrode (that is, the foregoing high-frequency treatment part and cutting part) does not have an obvious thermal effect, and a cutting speed is relatively slow, resulting in limited clinical application. Second, an area of contact between a passive electrode and tissue is relatively small, and tissue may be burned accidentally. Third, in both the solutions, the passive electrode and the active electrode are relatively close, the two electrodes may contact or a current may flow through tissue fluids between the electrodes to cause a short circuit failure. Fourth, in a surgical instrument for an endoscope, treatment instruments such as electrocoagulation forceps, biopsy forceps, needle knives, and the like in addition to snares and papilla incision knives need to be electrified to perform incision, cauterization, hemostasis, among other work. The passive electrode in the foregoing technical solution has relatively low adaptability.
Endoscopic surgeries have been widely promoted and used in recent years due to the advantages of less incisional damage and better clinical results. In the endoscopic surgeries, a treatment apparatus for an endoscope with an electrical treatment part (e.g., an electric trap, etc.) is used to cut, cauterize, and stop the bleeding of biological tissues. At present, the treatment apparatus for an endoscope mainly includes a single electrode treatment apparatus and/or a double electrode treatment apparatus. Since the single electrode treatment apparatus for the endoscope has a wide range of a current with a relatively high frequency flowing through tissue(s) when it is used, which is more damaging to the tissue(s), the double electrode treatment apparatus for the endoscope has developed rapidly in recent years.
The existing double electrode treatment apparatus for the endoscope generally has a layer of metal electrode on a surface of a sheath as a return electrode, which is equivalent to an electrode sheet attached to the tissue(s), thus making the double electrode treatment apparatus for the endoscope have all the basic functions of the single electrode treatment apparatus for the endoscope, and also have a function of free switching between a single electrode mode (i.e., used as the single electrode treatment apparatus) and a double electrode mode (i.e., used as the double electrode treatment apparatus). However, if a length of the metal electrode on the surface of the sheath of the double electrode endoscope is set short, there may be problems such as poor conducting stability, poor conductivity and tissue damage; if it is set too long, it may affect the flexibility of the sheath, which is not conducive to a free movement of the sheath in an instrument passage of the endoscope with various curved angles, and it may affect the convenience of an operator. Therefore, it is desired to provide a treatment apparatus for an endoscope and an expandable frame to at least partially solve the above problems.
Based on this, to overcome the disadvantages in the prior art, the present invention provides a treatment apparatus for an endoscope, an endoscope, and an expandable frame. The structural design is appropriate, the cutting speed is relatively high, the risk of passive electrode burns is relatively low, and adaptability is provided.
The technical solutions of the present invention are as follows:
A treatment apparatus for an endoscope, comprising: a first electrode, comprising an electrical treatment part and an operating wire; a second electrode, configured to be installed on the endoscope, the second electrode comprising a first electrically conductive part and a sliding contact part electrically connected to the first electrically conductive part, and the first electrically conductive part being configured to contact a human body; a sheath, provided on a surface thereof with a second electrically conductive part, wherein the operating wire is passed through the sheath, the sheath is configured to be passed through the endoscope, and when the sheath is located in a preset position, the sliding contact part contacts and is electrically connected to the second electrically conductive part and the sheath is in sliding fit with the sliding contact part.
In one of the embodiments, further comprising an expandable frame, wherein the expandable frame is configured to be sleeved over the endoscope, the first electrically conductive part is provided outside the expandable frame, the first electrically conductive part is provided on the expandable frame, and a distance between a part, being configured to contact a human body, of the first electrically conductive part and an axis of the endoscope is greater than a radius of the endoscope.
In one of the embodiments, wherein a conductive material is provided on a peripheral surface of the expandable frame, and the conductive material forms the first electrically conductive part.
In one of the embodiments, wherein the expandable frame is silicone rubber that contains several conductive particles, and the conductive particles form the first electrically conductive part.
In one of the embodiments, wherein a layer of a conductive material is provided on an outer surface of the sheath, and the conductive material forms the second electrically conductive part.
In one of the embodiments, wherein a first cavity and a second cavity are formed in the sheath, the operating wire is passed through the first cavity, a third electrically conductive part is provided in the second cavity, and the third electrically conductive part is electrically connected to the second electrically conductive part.
In one of the embodiments, wherein the second electrically conductive part surrounds the sheath by one loop in a circumferential direction of the sheath.
In one of the embodiments, wherein the sliding contact part comprises a fifth electrically conductive part and a sixth electrically conductive part, the sixth electrically conductive part is electrically connected to the first electrically conductive part, and the fifth electrically conductive part is electrically connected to the sixth electrically conductive part.
In one of the embodiments, wherein the expandable frame comprises a sleeve and a flexible part or an elastic part connected to the sleeve, the sleeve is configured to be sleeved over the endoscope, and the sliding contact part is fixed on an inner side of the sleeve.
A treatment apparatus for an endoscope, comprising: a first electrode, comprising an electrical treatment part and an operating wire; and a sheath, provided with a second electrically conductive part on an outer surface thereof, and the second electrically conductive part being configured to be electrically connected to a first electrically conductive part on an endoscope, wherein a first cavity and a second cavity are formed in the sheath, the operating wire is passed through the first cavity, a third electrically conductive part is provided in the second cavity, and the third electrically conductive part is electrically connected to the second electrically conductive part.
In one of the embodiments, wherein the second electrically conductive part is provided on an outer surface of the sheath.
In one of the embodiments, wherein a layer of a conductive material is provided on an outer surface of the sheath, and the conductive material forms the second electrically conductive part.
In one of the embodiments, wherein the second electrically conductive part surrounds the sheath by one loop in a circumferential direction of the sheath.
An expandable frame, wherein the expandable frame is configured to be installed on an endoscope, a diameter of a peripheral surface of the expandable frame is greater than a diameter of a peripheral surface of the endoscope, a first electrically conductive part and a sliding contact part electrically connected to the first electrically conductive part are provided on the expandable frame, the first electrically conductive part is provided on a periphery of the expandable frame to contact human body tissue, and the sliding contact part contacts and is electrically connected to a second electrically conductive part of the treatment apparatus for an endoscope in any one of the foregoing embodiments.
In one of the embodiments, wherein a conductive material is provided on the peripheral surface of the expandable frame, and the conductive material forms the second electrically conductive part.
In one of the embodiments, wherein the expandable frame comprises a sleeve and a transparent cover connected to the sleeve, the sleeve is configured to be sleeved over the endoscope, the transparent cover is transparent or translucent, and the transparent cover is configured to allow the endoscope to obtain an image.
In one of the embodiments, wherein the expandable frame comprises a sleeve and a flexible part or an elastic part connected to the sleeve, the sleeve is configured to be sleeved over the endoscope, and the sliding contact part is fixed on an inner side of the expandable frame.
An endoscope, comprising: a first electrically conductive part, provided on an outer surface of an endoscope, the first electrically conductive part being configured to contact a human body, an instrument passage being provided in the endoscope, the instrument passage being configured to be passed through by a treatment apparatus for an endoscope, a fourth electrically conductive part being provided inside the endoscope, and the first electrically conductive part being electrically connected to the fourth electrically conductive part.
In one of the embodiments, further comprising an expandable frame, wherein the expandable frame is installed outside the endoscope, and the first electrically conductive part is provided on the expandable frame.
In one of the embodiments, further comprising a tissue operation mechanism, wherein the first electrically conductive part and the fourth electrically conductive part are provided on the tissue operation mechanism, and the tissue operation mechanism is installed on the expandable frame.
In one of the embodiments, wherein two first electrically conductive parts are provided, one first electrically conductive part is provided on the tissue operation mechanism, the other first electrically conductive part is provided on the expandable frame, and the first electrically conductive part of the tissue operation mechanism is electrically connected to the first electrically conductive part of the expandable frame. In one of the embodiments, wherein a layer of a conductive material is provided on a peripheral surface of the endoscope, and the conductive material forms the first electrically conductive part.
In one of the embodiments, wherein a connecting through hole is formed in the endoscope, the peripheral surface of the endoscope and the instrument passage are communicated through the connecting through hole, and the conductive material is provided in the connecting through hole to electrically connect the first electrically conductive part to the fourth electrically conductive part.
In one of the embodiments, wherein the conductive material is provided on an end surface at a distal end of the endoscope to electrically connect the first electrically conductive part to the fourth electrically conductive part.
In one of the embodiments, further comprising a tissue operation mechanism, wherein the first electrically conductive part and the fourth electrically conductive part are provided on the tissue operation mechanism.
An expandable frame, configured to be installed outside an endoscope, a first electrically conductive part and a fourth electrically conductive part electrically connected to the first electrically conductive part being provided on the expandable frame, the first electrically conductive part being configured to contact a human body, and the fourth electrically conductive part being configured to be electrically connected to a feeding electrode.
In one of the embodiments, wherein the fourth electrically conductive part is a conductor wire, and the fourth electrically conductive part is configured to be passed through the endoscope or provided outside the endoscope.
The beneficial effects of the present invention are as follows:
The first electrode performs an electrical operation on a human body, and a current that enters the human body is looped through the second electrically conductive part instead of flowing all over the human body, so as to avoid damage to other organs or electronic apparatuses (for example, a pacemaker) in the human body, thereby ensuring the safety of the entire operation. Provided that electrical requirements can be satisfied, the second electrode may be provided at any position in the endoscope, so that a sufficiently large area of contact between the second electrically conductive part and the human body is ensured to fully guide out a current. A space of contact between an outer side of the endoscope body of the endoscope and tissue is fully used to increase a conductive area of a contact part through which a current is guided out from human body tissue in a return path, so that while the risk of burns is reduced, a thermal effect is further improved, thereby improving the security and operation efficiency of endoscopic surgery, and ensuring further clinical popularization and application of the treatment apparatus for an endoscope.
One or more embodiments of the present disclosure provide a treatment apparatus for an endoscope, comprising: a first electrode, the first electrode including an electrical treatment part and an operating wire a sheath, a surface of the sheath being provided with a bendable flexible conductive part, the flexible conductive part being in the form of a tube, the flexible conductive part having a gap formed in the flexible conductive part to facilitate a bend of the flexible conductive part, the surface of the sheath being communicated with an external air of the flexible conductive part through the gap; wherein the operating wire is threaded into the sheath and the electrical treatment part extends from a front end of the sheath.
In some embodiments, the flexible conductive part includes a metal member containing the gap, the metal member including one or more consecutive metal members, the gap between the one or more consecutive metal members being formed such that the surface of the sheath is partially exposed.
In some embodiments, the gap includes a slit formed between interrupted surfaces of the one or more consecutive metal members, the slit being spirally provided in an axial direction of the sheath.
In some embodiments, a pitch of the spirally provided slit is 0.1 to 2 mm.
In some embodiments, a width of the gap along the axial direction of the sheath is less than a length of a conductive structure cooperating with the flexible conductive part extending along an axial direction of the sheath.
In some embodiments, the flexible conductive part includes a metal member containing the gap, a width of the gap along an axial direction of the sheath being greater than or equal to a wall thickness of the metal member.
In some embodiments, the flexible conductive part includes a bent section and a straight section, the straight section being electrically connected to the bent section, a length of the straight section being less than or equal to six times a diameter of the straight section.
In some embodiments, the flexible conductive part includes two straight sections, the two straight sections including the straight section and a second section, the bent section being connected between the two straight sections, a length of the bent section being greater than or equal to two times the diameter of the bent section.
In some embodiments, the front end of the sheath extends out from a front end of the flexible conductive part.
In some embodiments, a first distance between the front end of the flexible conductive part and the front end of the sheath is in a range from 0.5 mm to 1.5 mm.
In some embodiments, the treatment apparatus for an endoscope further includes a second electrode and an expandable frame, wherein the second electrode is used to be mounted on the endoscope, the second electrode includes a first conductive part and a sliding contact part electrically connected to the first conductive part, the expandable frame is used to fit on an outside of the endoscope, the first conductive part is provided on a periphery of the expandable frame; the sheath is used to be threaded inside the endoscope, the sliding contact part is in contact with and electrically connected to the flexible conductive part when the sheath is in a preset position.
In some embodiments, the first conductive part includes a metal conductive layer of a variable diameter provided on the periphery of the expandable frame.
In some embodiments, the metal conductive layer is in a bow shape.
In some embodiments, the sliding contact part includes a metal shrapnel protruding inwardly, the metal shrapnel being electrically connected to the first conductive part; the metal shrapnel is provided with two lugs on both sides of the metal shrapnel, the two lugs being electrically connected to the metal shrapnel, the two lugs and the metal shrapnel forming a semi-enveloping structure for the flexible conductive part.
In some embodiments, the sliding contact part is provided on the expandable frame, the expandable frame includes a transparent straight frame provided at a front end of the expandable frame, and a front end of the sliding contact part has a second distance from a front end of the transparent frame.
In some embodiments, the second distance is in a range from 0.5 mm to 1.5 mm.
In some embodiments, a first distance between the front end of the flexible conductive part and the front end of the sheath is equal to the second distance.
In some embodiments, the sheath is provided with a return conductor, the return conductor passing through the sheath and being electrically connected to the flexible conductive part; the sheath is provided with an opening through which the return conductor passes, the opening being provided with a metal restriction tube, and the flexible conductive part being connected to the metal restriction tube.
One or more embodiments of the present disclosure provide a treatment apparatus for an endoscope, comprising: a first electrode, the first electrode including an electrical treatment part and an operating wire; a sheath, a surface of the sheath being provided with a bendable flexible conductive part; wherein the operating wire is threaded into the sheath, the electrical treatment part extends out from a front end of the sheath, and the front end of the sheath extends out from a front end of the flexible conductive part.
One or more embodiments of the present disclosure provide an expandable frame, wherein the expandable frame is provided with a first conductive part on a periphery of the endoscope, the first conductive part including a metal conductive layer of a variable diameter.
Sheath 10, first cavity 11, second cavity 12, operating wire 20, cutting part 21, ESD knife 222, electric snare 221, electrocoagulation forceps 223, electric biopsy forceps 224, conductor cavity 2251, cutting wire 2252, anchor 2253, drive part 30, sliding ring 31, endoscope body 401, instrument passage 403, transparent cover 41, expandable frame 42, return path 50, first electrically conductive part 51, second electrically conductive part 52, sliding contact part 53, third electrically conductive part 54, fourth electrically conductive part 55, feeding electrode 60, passive electrode 61, active electrode 62, tissue operation mechanism 70, treatment apparatus 100, first electrode 110, electrical treatment part 111, operating wire 112, sheath 120, flexible conductive part 121, return conductor 122, metal restriction tube 123, second electrode 130, first conductive part 131, sliding contact part 132, metal conductive layer 1311, metal shrapnel 1321, lug 1322, expandable frame 140, transparent straight frame 141, drive part 150, sliding ring 151, endoscope 160, instrument passage 161, lens 162.
The present invention is further described below in detail, but the implementations of the present invention are not limited thereto.
As shown in
As shown in
As shown in
An expandable frame is sleeved over a front end of the endoscope. As shown in
It should be noted that although the expandable frame 42 with a transparent cap 41 is provided in the foregoing embodiment, the foregoing two structures are not limited, provided that is an auxiliary apparatus for an endoscope can be tightly attached to a side wall of tissue and has a larger surface area than the sheath, so that the first electrically conductive part 51 may be attached to the peripheral surface of the peripheral surface of the expandable frame 42 and is connected to the second electrically conductive part 52 through the sliding contact part 53 to achieve the same effect. Preferably, as shown in
Further, as shown in
Although the third electrically conductive part 54 is encapsulated in the sheath 12 in this embodiment, a specific position of the third electrically conductive part 54 on the sheath is not limited, provided that the third electrically conductive part 54 is electrically isolated from the electric snare 221 in the first cavity 11 and is eventually electrically connected to the first electrically conductive part 51.
Although the third electrically conductive part 54 has a linear shape in this embodiment, the specific shape and structure of the third electrically conductive part 54 are not limited, provided that the third electrically conductive part 54 can electrically connect the first electrically conductive part 51 to the feeding electrode and can bend in accordance with a flexible cavity.
A working manner of the present invention is described below. Before operations of endoscopic surgery are started, the expandable frame 42 with the first electrically conductive part 51 is assembled at a distal end of an endoscope body 401 of the endoscope, and the sheath 10 with the electric snare 221 is further inserted in the instrument passage 403 of the endoscope. Next, the endoscope is inserted in a cavity (for example, a digestive tract, a vagina) of a human body, and an image transmitted by the camera 402 is simultaneously observed. When a focus is reached, a sliding ring 31 on the drive part 30 is operated, the electric snare 221 is closed around tissue to be excised, and the first electrically conductive part 51 is tightly attached to tissue 70 on a side wall at the same time. Finally, the feeding electrode 60 is turned on, and a current flows through the active electrode 62 of the feeding electrode 60, the electric snare 221, the tissue to be excised, and a return path 50 (as shown in
It should be noted that the foregoing electrical contact and electrical connection means that a current can be in practice conducted. For such contact, two entities may contact or the entities may not contact (there is a gap) but complete conduction of a current by means of conductive liquids (for example, tissue fluids, and secretions) in a human body.
The preferred solutions and beneficial effects of this embodiment are as follows:
The first electrode performs an electrical operation on a human body, and a current that enters the human body is looped through the second electrically conductive part instead of flowing all over the human body, so as to avoid damage to other organs or electronic apparatuses (for example, a pacemaker) in the human body, thereby ensuring the safety of the entire operation. Provided that electrical requirements can be satisfied, the second electrode may be provided at any position in the endoscope, so that a sufficiently large area of contact between the second electrically conductive part 52 and the human body is ensured to fully guide out a current.
Provided that electrical requirements can be satisfied, the expandable frame 42 may be provided at any position of the endoscope. Preferably, the expandable frame is provided at a distal end of the endoscope, and the expandable frame is kept as close as possible to the electrical treatment part of the first electrode, thereby reducing a path of a current flowing through the human body.
It should be noted that in this embodiment, the treatment apparatus for an endoscope may not include the second electrode. The second electrode may be externally connected to the treatment apparatus for an endoscope during use. In this case, the apparatus includes: a first electrode, including an electrical treatment part and an operating wire; and a sheath, provided on a surface thereof with a second electrically conductive part, where the second electrically conductive part is configured to be electrically connected to the first electrically conductive part on the endoscope. The arrangement of the remaining part of the sheath is the same as above. Details are not described herein again.
In this embodiment, the first electrically conductive part 51 is provided on the expandable frame 42 of the endoscope. An outer diameter of the expandable frame 42 is greater than an outer diameter of the endoscope body 401 of the endoscope, and the outer diameter of the endoscope body 401 of the endoscope is greater than an outer diameter of the sheath 10. Therefore, compared with the case in which the first electrically conductive part 51 is provided on the sheath 10, when the first electrically conductive part 51 is provided on the expandable frame 42, the first electrically conductive part 51 contacts a human body more easily to form an electrical loop, so as to ensure that “the electrical treatment part, the human body tissue, and the first electrically conductive part” form a stable current loop during surgery, thereby preventing the human body from burns.
Because the outer diameter of the expandable frame 42>the outer diameter of the endoscope body 401 of the endoscope>the outer diameter of the sheath 10, an area of contact between the first electrically conductive part 51 and the human body is large, a stronger surgical current may be used, and the surgery time is shortened. During surgery when a current is maintained within a safe current range, a length of safe contact of the first electrically conductive part 51 (the first electrically conductive part 51 provided inside the endoscope body 401) provided on the expandable frame 42 is far less than a length of the first electrically conductive part 41 provided on the sheath 10:
To facilitate description, for example, a diameter of a cutting head is 0.4 mm, an electrical cutting current is 680 mA, and an average surgery time is 2.1 s. According to the regulations in GB9706.4-2009 and IEC6060-2-2:2006, a safe threshold of a contact current for a human body is 1000 mA·s/cm2.
To describe a relationship between an arrangement position of a contact electrode and a requirement of a safe contact length L, it is assumed that a common digestive endoscope with a relatively small size, that is, a duodenoscope, is chosen for measurement. An outer diameter of the duodenoscope is d1=1.25 cm, and a maximum outer diameter of the treatment apparatus does not exceed an inner diameter of an endoscope channel d2=0.32 cm.
(1) The first electrically conductive part 51 is provided on the sheath 10.
It is assumed that when the first electrically conductive part 51 is provided on the sheath 10 (that is, the first electrically conductive part 51 is provided on the peripheral surface of the sheath 10 and has an annular shape), an area of contact between the first electrically conductive part 51 and a human body is:
where
means that assuming that the first electrically conductive part 51 has an annular shape surrounding the peripheral surface of the sheath 10 by one loop, a range of contact between the first electrically conductive part 51 and the human body tissue is ¼ of the arc surface (that is, only 90° of the circumferential 360° contacts human body tissue).
To satisfy the safe threshold of the contact current for the human body:
Therefore, assuming that the first electrically conductive part 51 is provided on the sheath 10, to satisfy the safe threshold of the contact current for the human body, a length of the first electrically conductive body 51 in an axial direction of the sheath needs to be greater than 5.68 cm, or otherwise a deep burn may occur in the human body during normal surgery.
(2) The first electrically conductive part 51 is provided inside the endoscope body 401.
Assuming that the first electrically conductive part 51 is provided inside the endoscope body 401, a maximum area of contact with human body tissue is:
To satisfy the safe threshold of the contact current for the human body:
As may be seen from above, the required length of the first electrically conductive part in the safe range is L1»L2. When the first electrically conductive part is provided on the peripheral surface of the expandable frame, the safe contact length required to prevent a deep burn is shorter than the length of the first electrically conductive part provided on the peripheral surface of the sheath by approximately 75%, so that the safe contact length can be reached more easily for the contact electrode during surgery, and the surgery is safer and more effective.
Embodiment 2 protects an endoscope.
In a first implementation, the fourth electrically conductive part 55 is provided on an inner wall of the instrument passage 403 of the endoscope. The first electrically conductive part 51 is provided on a periphery of the camera 402 at the distal end of the endoscope body 401, and is electrically connected to the fourth electrically conductive part 55 in the instrument passage 403 directly or through the sliding contact part 53.
In a second implementation, the fourth electrically conductive part 55 is provided on an outer wall of the endoscope body 401 of the endoscope, and the fourth electrically conductive part 55 and the first electrically conductive part 51 are integrally provided on a periphery of the endoscope body 401 to form a whole.
In a third implementation, the fourth electrically conductive part 55 is provided on the inner wall of the instrument passage 403 of the endoscope. The first electrically conductive part 51 is provided on the periphery of the camera 402 at the distal end of the endoscope body 401, and the sliding contact part 53 passes through a side wall of the endoscope body 401 to electrically connect the first electrically conductive part 51 to the fourth electrically conductive part 55 in the instrument passage 403.
Preferred solutions and beneficial effects of this embodiment are as follows:
Preferably, the second electrically conductive part 52 is configured to be electrically connected to the passive electrode 61 of the feeding electrode 60.
Embodiment 3 protects an expandable frame for another endoscope. As shown in
The differences between Embodiment 3 and Embodiment 1 lie in that the fourth conductive body instead of the sliding contact part is provided on the expandable frame, and the fourth conductive body is passed through the endoscope or provided outside the endoscope. Preferably, the fourth conductive body is a conductor wire, and the conductor wire is passed through the endoscope or provided outside the endoscope. The remaining shape of the expandable frame may be consistent with that in Embodiment 1. Such an expandable frame is conveniently used. The first electrically conductive part of the expandable frame is provided on a periphery of the expandable frame and contacts a human body and guides out a current in the human body. Next, the fourth electrically conductive part guides out the current in the human body, so as to provide a passage for guiding out the current from the human body. The fourth electrically conductive part may be easily installed inside the endoscope in a sleeving manner, it is not necessary to make additional changes to the endoscope, thereby achieving high compatibility and a wide use range.
The technical solutions in the foregoing embodiments may be implemented separately or implemented in combination, but is not limited to the foregoing embodiments. For example, the following variants may be used.
For example, to perform ESD surgery, as shown in
For another example, to perform hemostasis during surgery, as shown in
For still another example, to perform biopsy and hemostasis, as shown in
For yet another example, to perform endoscopic retrograde cholangiopancreatography (ERCP), as shown in
In addition, preferably, as shown in
In addition, the first electrically conductive part 51 may also be arranged in another manner.
In a variant, as shown in
In another variant example,
In another variant example,
In another variant example,
Differences between Embodiment 4 and Embodiment 1 are as follows:
As shown in
The fourth electrically conductive part 55 is further provided on the tissue operation mechanism 70. The first electrically conductive part 51 and the fourth electrically conductive part 55 that are provided on the tissue operation mechanism 70 are electrically connected.
The first electrically conductive part 51 is configured to contact a human body to form an electrical loop. One or both of the first electrically conductive part 51 on the expandable frame 42 and the first electrically conductive part 51 of the tissue operation mechanism 70 electrically contacts human body tissue, so as to guide out a current from the human body to form the loop. Two first electrically conductive parts 51 are provided to make it easier to electrically contact human body tissue, thereby ensuring the security of surgery and avoiding burning of human body tissue.
As shown in
The tissue operation mechanism 70 is an apparatus from performing operations on human body tissue. Any type of tissue operation mechanism 70 may be selected according to operations required in surgery, and the operations include, but are not limited to, holding tissue, snaring tissue, pushing tissue to create a space, pulling tissue, and fixing the position of tissue. Because a surgical procedure usually includes several operations, and an apparatus that can complete an operation other than the function of the treatment apparatus for an endoscope in the present invention may be regarded as a tissue operation apparatus in the present invention.
A method of using the treatment apparatus for an endoscope is as follows:
In this case, as shown in
Differences between Embodiment 5 and Embodiment 1 are as follows:
The expandable frame 42 is silicone rubber that contains several conductive particles, and the conductive particles form the first electrically conductive part. That is, the expandable frame 42 is conductive. The expandable frame forms the first electrically conductive part 51 and the sliding contact part 53, and an additional first electrically conductive part 51 and sliding contact part 53 do not need to be provided.
Differences between Embodiment 6 and Embodiment 2 are as follows:
The expandable frame 42 is silicone rubber that contains several conductive particles, and the conductive particles form the first electrically conductive part. That is, the expandable frame 42 is conductive. The expandable frame forms the first electrically conductive part 51 and the sliding contact part 53, and an additional first electrically conductive part 51 and sliding contact part 53 do not need to be provided.
Differences between Embodiment 7 and Embodiment 3 are as follows:
The expandable frame 42 is silicone rubber that contains several conductive particles, and the conductive particles form the first electrically conductive part. The expandable frame 42 is conductive. The expandable frame forms the first electrically conductive part 51, and an additional first electrically conductive part does not need to be provided.
In the present invention, a space of contact between an outer side of the endoscope body of the endoscope and tissue is fully used to increase a conductive area of a contact part between the treatment apparatus for an endoscope and tissue in a return path, so that while the risk of bipolar instrument burns is reduced, a thermal effect between the high-frequency treatment part and tissue to be excised and electrocoagulated is further improved, thereby improving the security and operation efficiency of endoscopic surgery, and ensuring further clinical popularization and application of bipolar instruments.
As shown in
The first electrode may be used to conduct a current with a relatively high frequency to perform a clinical manipulation of a tissue (e.g., an endoscopic surgery). In some embodiments, the first electrode 110 may include an electrical treatment part 111 and an operating wire 112.
The electrical treatment part may be a component used to perform a clinical manipulation of a tissue (e.g., a human tissue). For example, the electrical treatment part may include an electrical trap, electrocoagulation forceps, electrical biopsy forceps, an incisional knife, etc. In some embodiments, the electrical treatment part 111 may be used to perform a clinical manipulation of a human tissue, including, but is not limited to, an electroshock, an electrothermal, an electrocautery, etc.
The operating wire may be a component used to manipulate the electrical treatment part. In some embodiments, the operating wire 112 may be electrically connected to one of poles of a power supply electrode (e.g., an active electrode) at one end and electrically connected to the electrical treatment part 111 at the other end. The power supply electrode may include an active electrode and a passive electrode, where the active electrode supplies power to the electrical treatment part 111, and the electrical treatment part 111 clinically manipulates a human tissue, and a current enters the human tissue and is then led out and returned to the passive electrode via other component(s) (e.g., a second electrode, a flexible conductive part, etc.), thereby forming a current circuit.
In some embodiments, the operating wire 112 and the electrical treatment part 111 may be an integral conductor to enable a current with a relatively high frequency to be conducted from the active electrode to the electrical treatment part 111 via the operating wire 112; the operating wire 112 and the electrical treatment part 111 may be electrically connected via a conductor based on a removable connection (e.g., a threaded connection, etc.), through which the electrical treatment part 111 may be replaced based on an actual condition of a patient to enable it to meet different treatment needs of different patients.
In some embodiments, an electrical connection between the active electrode and the electrical treatment part 111 may be achieved through the operating wire 112 based on other mean(s). For example, the operating wire 112 itself may not be electrically conductive and a separate wire may be connected between the electrical treatment part 111 and the active electrode for the purpose of the electrical connection.
The electrical connection may be used to conduct a current. In some embodiments, the electrical connection may include, but is not limited to, a connection based on a conductor, a wire, a conduit, or a connection based on a conductive fluid (e.g., a tissue fluid, a secretory fluid, etc.) within a human tissue.
In some embodiments, the operating wire 112 may be threaded into the sheath 120 and the electrical treatment part 111 may extend out from a front end of the sheath 120 for a clinical manipulation of a human tissue. The front end may be understood to be an end away from an operator of the treatment apparatus.
The sheath may be a component capable of being moved within the endoscope. The sheath may be an insulating tube, such as an insulating tube made of an insulating material such as resin. In some embodiments, the sheath 120 may be used to insulate and protect the first electrode 110 to avoid a short circuit.
Further, the sheath 120 may be an insulating hose. In some embodiments, the sheath 120 may be connected to a drive part 150 (with sliding ring 151 provided thereon) external to the body and moved within the endoscope 160 under the control of the drive part 150.
The endoscope may be a medical device used to directly view an internal cavity of a human organ. In some embodiments, the endoscope 160 may include an instrument passage 161. The instrument passage may be used to move the sheath within the endoscope.
In some embodiments, the endoscope 160 may also include a lens 162. The lens may be used to obtain an image of the internal cavity of the human organ (e.g., an image of a lesion region, etc.) and transmit it to a display device (not shown in the figures). The operator (e.g., a physician) may perform a corresponding operation based on the image of the internal cavity of the human organ.
In some embodiments, the surface of the sheath 120 is provided with the bendable flexible conductive part 121.
The bendable flexible conductive part may mean that the flexible conductive part 121 may be bent at multiple (e.g., any angles) angles. Exemplarily, the sheath 120 may be bent by 30°, 60°, 90°, 180°, 210°, etc., depending on actual needs as the flexible conductive part 121 is moved through the instrument passage 161 of the endoscope 160, based on the scenario of the use of the treatment apparatus 100 for an endoscope at different positions within a human tissue.
The flexible conductive part may be a bendable structure provided on the surface of the sheath and capable of being used to conduct a current. In some embodiments, the bendable flexible conductive part 121 may be implemented in a variety of ways. For example, it may be achieved by spraying a conductive material (e.g., a conductive paint, etc.) on the surface of the sheath 120 such that a conductive material layer covers at least a portion of the surface of the sheath 120.
In some embodiments, the flexible conductive part 121 may be in the form of a tube, and the flexible conductive part 121 may have a gap to facilitate a bending of the flexible conductive part, and the surface of the sheath may be connected to the external air of the flexible conductive part through the gap, so as to achieve a bendable function of the flexible conductive part 121. For more information about the flexible conductive part and the gap, please refer to
As shown in
The second electrode may be a component mounted to the endoscope for drawing a current out of a body tissue. In some embodiments, the second electrode 130 may include a first conductive part 131 and a sliding contact part 132 electrically connected to the first conductive part 131.
The first conductive part may be a component for contacting a human tissue to conduct a current from the human tissue to the sliding contact part.
As shown in
In some embodiments, the first conductive part 131 may be conductive based on a variety of ways. For example, the first conductive part 131 may be a metal plating, including but not limited to a silver plating, a copper plating, etc.; as another example, the first conductive part 131 may be a conductive plastic or a conductive rubber, including but not limited to a conductive silicone, etc.
In some embodiments, the first conductive part 131 may include a metal conductive layer 1311. For more information about the first conductive part, please refer to
The sliding contact part may be a component that is electrically connected to the first conductive part for conducting the current from the first conductive part to the flexible conductive part.
In some embodiments, the sliding contact part 132 may include a conductive material and its structure may include but is not limited to the form of a sheet, a rod, etc. It can be understood that the sliding contact part 132 may be connected electrically to the first conductive part 131 and the flexible conductive part 121 so that the current may be conducted from the first conductive part 131 to the flexible conductive part 121 via the sliding contact part 132, and the present disclosure does not limit the structure of the sliding contact part 132.
In some embodiments, the sheath 120 may be threaded into the endoscope 160, with the sliding contact part 132 in contact with and electrically connected to the flexible conductive part 121 when the sheath 120 is in a preset position. Specifically, the sheath 120 may be threaded into the instrument passage 161 of the endoscope 160 and be controlled to move freely in and out of the instrument passage 161 by the drive part 150 (having the sliding ring 151 thereon) connected to the exterior of the body.
In some embodiments of the present disclosure, by having a bendable flexible conductive part on the surface of the sheath, the process may be simplified, the manufacturing cost may be relatively low, the conductive stability may be improved, and it can ensure that the sheath can smoothly pass through the instrument passage at various bending angles, which in turn can make it easier and more convenient for the operator (e.g., a physician) to use in order to shorten the treatment time.
The preset position may refer to a predetermined position where the sheath can reach. In some embodiments, the preset position may be determined based on simulations, experiments, etc.
The preset position may be a specific position, such as 5 mm after the front end of the sheath passes through the endoscope, etc.; alternatively or additionally, the preset position may be a range interval within which the sliding contact part can contact and electrically connect with the flexible conductive part on the sheath when the sheath slides within the range interval.
In some embodiments, the sliding contact part 132 may contact and electrically connect to the flexible conductive part 121 when the sheath 120 is in the preset position, thereby allowing for the sequential drawing of the current from the human tissue through the first conductive part 131, the sliding contact part 132, and the flexible conductive part 121.
For more information about the sliding contact part, please refer to
The expandable frame may be a component used to maintain a proper endoscopic field of view to aid in the clinical operation. A structure of the expandable frame is not limited and may be straight, stepped cylindrical, conical, etc. In some embodiments, the structure of the expandable frame 140 may be determined based on experiments, simulations, etc.
As shown in
In some embodiments, the expandable frame 140 may be made of a flexible insulating material to accommodate the endoscopes 160 of different diameters. In some embodiments, the periphery of the expandable frame 140 may be provided with the first conductive part 131 for the direct contact with the human tissue to reduce the path of current flow through the human body in order to quickly draw the current out of the human tissue.
As shown in
For more information about the expandable frame and the first conductive part, please refer to
As shown in
In some embodiments of the present disclosure, the treatment apparatus for an endoscope may be provided with a flexible conductive part based on the surface of the sheath, which enables the sheath to move freely in the instrument passage at various angles of the endoscope and makes the apparatus more convenient to use; and by providing an expandable frame on the endoscope and a first conductive part on the periphery of the endoscope, the first conductive part can be brought into full contact with the human tissue, and when the sheath is located in the preset position, the sliding contact part is in contact with and electrically connected to the flexible conductive part, so that the current in the human tissue can be drawn out quickly without flowing through the whole body, which can appropriately increase the current intensity and thus increase the speed of clinical operation (e.g., a cutting speed etc.).
As shown in
The metal member may refer to a metal structure provided on the surface of the sheath for conducting a current. In some embodiments, the metal member may include one or more consecutive metal members. The consecutive metal members may be understood as metal articles in each of which the machined and formed parts are formed as one piece.
In some embodiments, the gap may allow the surface of the sheath to be partially exposed. The exposed area may be determined based on different structures of the one or more consecutive metal members.
In some embodiments, the gap may be formed based on the one or more consecutive metal members. Further, the gap may be formed based on the different structures formed by the one or more consecutive metal members. In some embodiments, as shown in
In some embodiments, the gap may include a gap formed between interrupted surfaces of the one or more consecutive metal members, and the gap may be spirally provided in an axial direction of the sheath 120. The interrupted surfaces may be understood as a surface on which one of internal structures of the metal member is opposite to that of another internal structure; or a surface on which one metal member of multiple metal members is opposite to another metal member.
In some embodiments, as shown in
In some embodiments, a pitch P of the spirally set slit may not be too large or too small. If the pitch P is too large, it may affect the bendability of the flexible conductive part 121; if the pitch P is too small, it may affect the electrical conductivity of the flexible conductive part 121. In some embodiments, the pitch P of the spirally set slit may be 0.1 to 2 mm. In some embodiments, the pitch P of the spirally set slit may be 0.3 to 1.5 mm. In some embodiments, the pitch P of the spirally set slit may be 0.5 to 1 mm.
In some embodiments, a width of the gap in the metal member along the axial direction of the sheath 120 may be less than a length of the conductive structure that cooperates with the flexible conductive part 121 extending along the axial direction of the sheath 120.
In some embodiments, the conductive structure may refer to a structure that cooperates with the flexible conductive part 121 for conducting the current. In some embodiments, the conductive structure may include the sliding contact part 132, where the width of the gap in the metal member along the axial direction of the sheath 120 is less than the length of the sliding contact part 132 extending along the axial direction of the sheath 120.
In some embodiments of the present disclosure, by making the width of the gap of the metal member along the axial direction of the sheath smaller than the length of the conductive structure extending along the axial direction of the sheath, it is possible to avoid the conductive structure being stuck in the gap due to the gap of the metal member being too large, so that a stable electrical connection between the flexible conductive part and the conductive structure can be ensured so that the current in the human tissue can be drawn out smoothly and damage to the human body can be avoided.
In some embodiments, the width of the gap of the metal member along the axial direction of the sheath 120 may be greater than or equal to a wall thickness of the metal member.
The wall thickness of the metal member may refer to a thickness of the metal member in a radial direction along the sheath. By limiting the width of the gap of the metal member along the axial direction of the sheath to be greater than or equal to the wall thickness of the metal member, the metal member may be made easier to bend, which may effectively ensure a bendable function of the flexible conductive part 121, which in turn may enable the sheath 120 to pass smoothly through the instrument passage 161 of the endoscope 160 at various bending angles, which is conducive to saving operation time and improving the patient treatment experience.
In some embodiments, as shown in
The bent section may refer to a bendable portion of the flexible conductive part. In some embodiments, the bent section is used to implement the bendable function of the flexible conductive part 121 to allow the sheath 120 wrapped in the flexible conductive part 121 to pass smoothly through the instrument passage 161 of the endoscope 160 at various bending angles.
The straight section may refer to a straight portion of the flexible conductive part. In some embodiments, the straight section may be electrically connected to the bent section.
In some embodiments, the electrical connection between the straight section and the bent section may be implemented based on a variety of approaches. For example, the straight section and the bent section may be a one-piece structure to form an electrical connection; as another example, the straight section and the bent section may be electrically connected by welding, etc.
In some embodiments, a length of the straight section may be related to a diameter of the straight section. In some embodiments, in order to ensure that the flexible conductive part 121 is bendable at an angle such that the sheath 120 wrapped by the flexible conductive part 121 can pass smoothly through the instrument passage 161 of the endoscope 160 at various bending angles, the length of the straight tube segment may be less than or equal to 6 times the diameter of the straight section.
In some embodiments, the straight section(s) and the bent section(s) may be combined to form the flexible conductive part 121, in which the count of the straight section(s) and the bent section(s) and/or the form of combination thereof are not limited. For example, the flexible conductive part 121 may be formed based on a combination of one straight section and one bent section; or, as another example, the flexible conductive part 121 may be formed based on three straight sections and two bent sections, in the form of a cross combination of straight sections and bent sections, etc. In some embodiments, the flexible conductive part 121 may include two straight sections and two bent sections.
In some embodiments, the flexible conductive part 121 may include two straight sections, and the bent section is connected between the two straight sections. In some embodiments, in order to ensure the bending ability of the bent section and enhance the bendability of the flexible conductive part 121, the length of the bent section may be greater than or equal to two times the diameter of the bent section. In some embodiments, the diameter of the bent section may be equal to the diameter of the straight section.
In some embodiments, if the flexible conductive part 121 includes a bent section connected between two straight sections, the length of the straight section located at a front end (i.e., the straight section away from the operator of the treatment apparatus) may be greater than the length of the straight section located at a rear end (i.e., the straight section near the operator of the treatment apparatus) to better match the use of the expandable frame 140. In some embodiments, the exact length of the straight section located at the front end and that of the straight section located at the rear end may be determined based on actual circumstances.
In some embodiments of the present disclosure, by the design of the relationship between the length of the bent section and its diameter, it is possible to ensure not only the bendable angle of the flexible conductive part to fully ensure its over-bending performance, but also to guarantee the conductive performance between the flexible conductive part and the sliding contact part and between the straight section and the bent section of the flexible conductive part.
As shown in
In some embodiments of the present disclosure, by extending the front end of the sheath beyond the front end of the flexible conductive part, the electrical treatment part provided at the front end of the sheath may be kept at a distance from the flexible conductive part to avoid a short circuit (i.e., shorting out the first conductive part 131) caused by a liquid backflow (e.g., tissue fluid, etc.) into the flexible conductive part while the electrical treatment part is under clinical operation.
As shown in
The first distance may refer to a distance between the front end of the flexible conductive part and the front end of the sheath.
In some embodiments, a range of the first distance d1 may be from 0.5 mm to 1.5 mm. In some embodiments, the range of the first distance d1 may be other range intervals, which may be determined based on experiments, simulations, etc.
In some embodiments, the first distance d1 may be equal to a second distance d2 that exists between a front end of the sliding contact portion 132 and a front end of the transparent straight frame 141 of the expandable frame 140 to avoid a short circuit due to a liquid backflow (e.g., tissue fluid) during use of the apparatus, which in turn may ensure the safety of the apparatus during use and may protect the apparatus to a certain extent.
For more information about the transparent straight frame and the second distance of the expandable frame, please refer to
In some embodiments of the present disclosure, by setting the first distance between the front end of the flexible conductive part and the front end of the sheath, and limiting the range of the first distance, the flexible conductive part can be better used with the expandable frame to avoid a short circuit due to a liquid backflow during the use of the apparatus, thus ensuring the safety of the apparatus when it is used; at the same time, it can also protect the apparatus from damage due to the short circuit.
As shown in
In some embodiments, the variable diameter may mean that a diameter of the metal conductive layer 1311 provided at the periphery of the expandable frame 140 may vary based on a size of the diameter of the endoscope 160 so that it may be applicable to the endoscope 160 with various diameters.
In some embodiments, the metal conductive layer 1311 may be made of one or more conductive materials, such as copper, silver, etc. In some embodiments, the metal conductive layer 1311 may be a thin layer to reduce the volume thereof. Further, the metal conductive layer 1311 may be a smooth, thin layer to reduce harm to the human body. In some embodiments, a structure of the metal conductive layer 1311 is not limited. For example, the metal conductive layer 1311 may be a folded structure, a grid strip structure, etc.
In some embodiments, the metal conductive layer 1311 may be a bow shape structure.
As shown in
It can be understood that as the diameter of the endoscope 160 increases, the bow shape structure may be extended along a circumferential direction of the expandable frame 140 so that the diameter of the metal conductive layer 1311 increases accordingly to accommodate the endoscope and expandable frame with various diameters.
In some embodiments of the present disclosure, by using the bow shape structure to achieve the function of the variable diameter of the metal conductive layer, the metal conductive layer may have a simple structure, easy to be processed, and may have a low manufacturing cost.
In some embodiments of the present disclosure, by providing the metal conductive layer of a variable diameter around the periphery of the expandable frame, it can not only ensure a contact area between the metal conductive layer and the human tissue to avoid the risk of overheating burns that may occur due to a small contact area; but also enable the expandable frame to be adapted to the endoscopes of various diameters, which in turn can improve the applicability and practicality of the expandable frame.
As shown in
The metal shrapnel may be a thin sheet of metal having a certain degree of elasticity. In some embodiments, the metal shrapnel 1321 may be electrically connected to the first conductive part 131 based on a variety of ways. For example, the metal shrapnel 1321 may be a one-piece structure with the metal conductive layer 1311 of the first conductive part 131 to achieve the electrical connection; as another example, the metal shrapnel 1321 is a split structure with the metal conductive layer 1311 of the first conductive part 131, and the metal shrapnel 1321 is electrically connected to the first conductive part 131 through direct contact; as another example, the metal shrapnel 1321 may be electrically connected to the metal conductive layer 1311 of the first conductive part 131 by other conductors. The metal shrapnel 1321 may be electrically connected by contacting the metal conductive layer 1311 of the first conductive part 131 with other conductors, etc.
In some embodiments, when the sheath 120 is moved to the preset position, the sliding contact part 132 may contact and form an electrical connection with the flexible conductive part 121 on the sheath 120 through the inwardly protruding metal shrapnel 1321, thereby enabling a current conduction.
In some embodiments, a structure and a size of the metal shrapnel 1321 are not limited. For example, a portion of the metal shrapnel 1321 may be electrically connected through the expandable frame 140 to the metal conductive layer 1311 set on the periphery of the expandable frame 140, while another portion of the metal shrapnel 1321 may be an arc sheet adapted to the diameter size of the sheath 120, etc.
As shown in
The lugs may be an auxiliary structure for restraining the sheath. In some embodiments, a manner in which the lugs 1322 are provided may be related to the size of the diameter of the sheath 120. Exemplarily, if the diameter of the sheath 120 is relatively large, an angle between the two lugs 1322 may be relatively large, i.e., a space enclosed by the two lugs 1322 may be relatively large; if the diameter of the sheath 120 is relatively small, an angle between the two lugs 1322 may be relatively small, i.e., a space enclosed by the two lugs 1322 may be relatively small.
In some embodiments, the lugs 1322 and the metal shrapnel 1321 may be configured as one piece or separate pieces.
In some embodiments, the two lugs 1322 may form a semi-enveloping structure with the metal shrapnel 1321 against the flexible conductive part 121 for restraining the sheath 120.
Specifically, when the sheath 120 moves forward and through the semi-enveloping structure formed by the metal shrapnel 1321 and the two lugs 1322 to the preset position, the inwardly protruding metal shrapnel 1321 and the lugs 1322 provided on both sides of the metal shrapnel 1321 may be in sufficient contact with the flexible conductive part 121 on the sheath 120 to achieve a stable electrical connection.
In addition, the presence of the semi-enveloping structure can restrain the sheath 120 to a certain extent to avoid its swinging from side to side, thereby improving the stability of the electrical processing part 111 in the performance of the clinical operation.
In some embodiments of the present disclosure, the metal shrapnel is electrically connected to the first conductive part, and when the sheath is moved to the preset position, the inwardly protruding metal shrapnel may fully contact with the flexible conductive part on the sheath, and thus, a stable electrical connection may be formed between the first conductive part, the metal shrapnel and the flexible conductive part, which is conducive to the rapid drawing out of the current in the human tissue to ensure the safety of the apparatus in use and to avoid damage to the human body.
As shown in
The transparent straight frame may refer to a transparent portion of a front portion of the expandable frame. In some embodiments, the transparent straight frame 141 may be made of a transparent flexible insulating material, which may enable a more open and clear view of the endoscope 160, thereby allowing the operator to observe the lesion in more detail, and thus allowing better clinical operation.
As shown in
The second distance may be a distance between the front end of the sliding contact part and the front end of the transparent straight frame. In some embodiments, the second distance d2 may range from 0.5 mm to 1.5 mm. In some embodiments, a range of the second distance d2 may be other range intervals, which may be determined based on experiments, simulations, etc.
In some embodiments, the first distance d1 exists between the front end of the flexible conductive part 121 and the front end of the sheath 120, and the first distance d1 may be equal to the second distance d2, i.e., d1=d2. By setting the first distance d1 existing between the front end of the flexible conductive part 121 and the front end of the sheath 120, and the second distance d2 existing between the front end of the sliding contact part 132 and the front end of the transparent straight frame 141, the flexible conductive part 121 can be better used with the expandable frame 140 to avoid the short circuit caused by the a liquid backflow (e.g., tissue fluid) during the use of the apparatus, which can ensure the safety of the apparatus and protect the apparatus to a certain extent.
As shown in
The return conductor may be a component used to conduct the current back to the passive electrode. In some embodiments, a material of the return conductor 122 may be molybdenum wire, silver wire, etc., which is not limited.
In some embodiments, an electrical connection of the return conductor 122 to the flexible conductive part 121 may be achieved based on a variety of ways. For example, the return conductor 122 may be electrically connected by a direct contact with the flexible conductive part 121; as another example, the return conductor 122 may be electrically connected by other conductor(s) contacting the flexible conductive part 121, etc.
In some embodiments, the sheath 120 is provided with an opening (not shown in the figures) through which the return conductor 122 passes, and a metal restriction tube 123 is provided at the opening, and the flexible conductive part 121 is connected to the metal restriction tube 123.
The opening may be a through-hole in the sheath for the return conductor to pass through. The opening may be a circular hole, an oval or other shaped hole, and a shape of the opening may be not limited. In some embodiments, a size of the opening may be determined based on actual circumstances. For example, the size of the opening may be determined based on a size of the metal restriction tube 123.
The metal restriction tube may be a component used to connect the return conductor to the flexible conductive part. In some embodiments, a material of the metal restriction tube 123 may be a conductive metal such as copper, silver, etc., which is not limited.
In some embodiments, a connection of the metal restriction tube 123 to the flexible conductive part 121 may be a fixed connection. The fixed connection may include a non-detachable connection (e.g., welded, etc.) or a detachable connection (e.g., snap connection, etc.).
In some embodiments, based on the metal restriction tube 123 being connected to the flexible conductive part 121, the return conductor 122 may be electrically connected to the flexible conductive part 121 so that the current in the human tissue can be returned to the passive electrode via the first conductive part 131, the sliding contact part 132, the flexible conductive part 121, the metal restriction tube 123, and the return conductor 122.
In some embodiments of the present disclosure, the connection stability of the electrical connection can be better ensured by using the metal restriction tube to electrically connect the return conductor to the flexible conductive part.
In some embodiments of the present disclosure, by providing the return conductor inside the sheath and the return conductor passing through the sheath to achieve a stable electrical connection with the flexible conductive part, the current in the human tissue can be smoothly and quickly returned to the passive electrode, thus ensuring the smooth operation.
Some embodiments of the present disclosure provide a treatment apparatus for an endoscope, the apparatus includes a first electrode, the first electrode includes an electrical treatment part and an operating wire; a sheath, a surface of the sheath is provided with a bendable flexible conductive part; wherein the operating wire is threaded into the sheath, the electrical treatment part extends from a front end of the sheath, and the front end of the sheath extends from a front end of the flexible conductive part.
Some embodiments of the present disclosure provide an expandable frame used to be snapped onto an outside of the endoscope, with a first conductive part around a periphery of the expandable frame, the first conductive part includes a metal conductive layer of variable diameter.
Possible beneficial effects of the embodiments of the present disclosure include, but are not limited to: (1) based on the surface of the sheath, the bendable flexible conductive part is provided, which is simple, has low manufacturing cost and good conductive stability, and can allow the sheath to move freely in the instrument passage of the endoscope at various curved angles, thus making the apparatus more convenient to use; (2) based on the front end of the flexible conductive part and the front end of the sheath, the first distance is provided, and the range of the first distance is set so that the flexible conductive part can be better used with the expandable frame to avoid the short circuit due to a liquid backflow during the use of the apparatus, thus ensuring the safety of the apparatus in use, and also protecting the apparatus from damage due to the short circuit; (3) based on the provision of the expandable frame over the endoscope and the first conductive part on the periphery of the expandable frame, the first conductive part can be brought into full contact with the human tissue, and when the sheath is located at the preset position, the sliding contact part makes contact with the flexible conductive part and forms a stable electrical connection, which can realize the rapid drawing out of the current from the human tissue without flowing through the whole body, and thus can reduce the risk of causing damage to the human body; moreover, it can appropriately increase the current intensity and thus the speed of the clinical operation (e.g., cutting speed, etc.). It should be noted that different embodiments may produce different beneficial effects, and in different embodiments, the possible beneficial effects may be any one or a combination of the above, or any other beneficial effect that may be obtained.
The technical features in the foregoing embodiments may be randomly combined. For simplicity of description, all possible combinations of the technical features in the foregoing embodiments are not described. However, it should be considered that these combinations of technical features fall within the scope recorded in the specification provided that these combinations of technical features do not have any conflict.
The foregoing embodiments only describe several implementations of the present invention, and their description is specific and detailed, but cannot therefore be understood as a limitation to the patent scope of the present invention. It should be noted that a person of ordinary skill in the art may further make variations and improvements without departing from the conception of the present invention, and these all fall within the protection scope of the present invention. Therefore, the patent protection scope of the present invention should be subject to the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201710058825.2 | Jan 2017 | CN | national |
This application is a continuation in part of U.S. application Ser. No. 16/518,987, filed on Jul. 23, 2019, which is a continuation in part of International Application No. PCT/CN2018/071404, filed on Jan. 4, 2018, which claims priority to Chinese Patent Application No. 201710058825.2, filed on Jan. 23, 2017, the contents of each of which are hereby incorporated by reference in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| Parent | 16518987 | Jul 2019 | US |
| Child | 18314155 | US | |
| Parent | PCT/CN2018/071404 | Jan 2018 | US |
| Child | 16518987 | US |
