Patent Application
20130338580
The present invention relates to an endoscopic device that collects a liquid in a body.
This application is a continuation based on U.S. Patent Application No. 61/572,286 provisionally applied in the United States on Aug. 8, 2011 and PCT/JP2012/070116, filed on Aug. 7, 2012. The contents of both the United States Patent Application and the PCT Application are incorporated herein by reference.
In the related art, a catheter is known as an endoscopic device that suctions tissues or liquids in a body. For example, a catheter that has a plurality of suction passages formed in an outer surface thereof is disclosed in Published Japanese Translation No. 2009-537254 of the PCT International Publication. The catheter disclosed in Published Japanese Translation No. 2009-537254 of the PCT International Publication has four suction passages that are punched in an outer surface of the catheter and that lead to an internal lumen, and blood or other fluids are suctioned into the inside of the catheter through the plurality of suction passages.
According to a first aspect of the present invention, an endoscopic device includes a longitudinal member which has a lumen provided to extend along a longitudinal axis; and a bending portion which is formed on a distal end side of the longitudinal member and has a restoring force that restores the bending portion to a bent shape, the bending portion has an opening portion, which opens to communicate with the lumen, in an inside surface of a bend in the bent shape restored by the restoring force, and pressing surface faces the opening portion in order to press a tissue using an outside surface of the bend in the bent shape restored by the restoring force and is provided in the outside surface of the bend.
According to a second aspect of the present invention, in the first aspect, a suction portion that suctions a liquid through the lumen, and a connection port which is capable of being attached or removed to a suction portion that suctions a liquid through the lumen may be attached to a proximal end side of the longitudinal member.
According to a third aspect of the present invention, in the flint aspect, a connection port that is tubular shape and communicates with the lumen and a suction portion that is connected to the connection port and suctions a liquid through the lumen may be provided on a proximal end side of the longitudinal member.
According to a fourth aspect of the present invention, in the first aspect, the pressing surface may press the tissue by the restoring force.
According to a fifth aspect of the present invention, in the second aspect or the third aspect, the longitudinal member may have openings at the distal end and the proximal ends, respectively, the proximal end of the longitudinal member may be provided with an operating portion formed with a wire passage for inserting a stylet into the longitudinal member, and the connection port may branch from the passage and open to an external surface of the operating portion.
According to a sixth aspect of the present invention, in the first aspect., the bending portion may be spirally formed.
According to a seventh aspect of the present invention, in the first aspect, the bending portion may be provided on the distal end side of the longitudinal member, and the longitudinal member may be provided with a curved portion formed such that a central axis of the longitudinal member is curved closer to the proximal end side than the bending portion.
According to a eighth aspect of the present invention, in the first aspect, the longitudinal member may have flexibility and be insertable through a channel of an endoscope.
According to a ninth aspect of the present invention, in the sixth aspect, the bending portion may be provided on the distal end side of the longitudinal member and may be formed in a conical coil shape.
According to a tenth aspect of the present invention, in the ninth aspect, a positional relationship between a central axis of the longitudinal member closer to the proximal end side than the bending portion and a centerline of the bending portion may be an intersecting or twisted position.
According to a eleventh aspect of the present invention, in the tenth aspect, a balloon may be provided on at least one of the proximal end side of the bending portion and the distal end side of the bending portion, the longitudinal member may be inserted into a digestive tract, and the balloon may inflate larger than the internal diameter of the lumen tissue by supplying a fluid thereinto.
According to a twelfth aspect of the present invention, in the first aspect, a plurality of opening portions may be provided, and all the plurality of opening portions may be directed to the inner side in the state where the bending portion is unloaded.
An endoscopic device 1 of a first embodiment of the present invention will be described below with reference to
First, the configuration of the endoscopic device 1 of the present embodiment will be described.
As shown in
The tube member 2 is a longitudinal member that has an internal space (lumen) provided to extend along a longitudinal axis. The tube member 2 is a tubular member that has flexibility and has an external diameter such that the tube member is insertable through a channel 102 (refer to
The tube member 2 is transparent at least in a part or preferably the whole of the vicinity of the distal end 2a.
The bending portion 3 is formed by a bending tendency being given to the tube member 2. The shape of the bending portion 3 is a shape such that the bending portion is bent in a U-shape in an unloaded state and such that an opening formed at the distal end 2a of the tube member 2 is directed to the proximal end 2b side. When the bending portion 3 is inserted through the channel 102 shown in
The plurality of through holes 4 are arranged side by side along the central axis O1 of the tube member 2, and when the bending portion 3 is bent, the through holes open toward the inner side of a bend of the bending portion 3. That is, in the present embodiment, the plurality of through boles 4 are directed to the inner side in the unloaded state of the bending portion 3.
The connection port 5 is a tubular member that communicates with the opening of the proximal end of the tube member 2, and has a lure lock structure or the like. The connection port 5 communicates with the internal space of the tube member 2. A distal end of a syringe 11 of the syringe 10 (suction portion) corresponding to a lure lock is attached to the connection port 5 when the endoscopic device 1 is used. The syringe 10 is connected to the connection port 5 and suctions a liquid through the internal space of the tube member 2. The endoscopic device 1 may have a configuration in which the tube member does not have the connection port 5, and the syringe 11 is directly attached to the proximal end opening of the tube member 2 or may have a configuration in which the proximal end opening of the tube member 2 is directly connected to a connection port of a suction pump.
Next, the operation of the endoscopic device 1 will be described.
The endoscopic device 1 of the present embodiment is inserted into the body, and is used in order to collect liquids accumulated in the body.
As shown in
During treatment, first, an operator performs delivery to a treatment target, for example, using the endoscope 100 (refer to
The tube member 2 deforms elastically in a shape along the inner surface of the channel 102 within the channel 102 due to the flexibility of the tube member 2. If the tube member 2 is pushed into the channel 102, the distal end 2a of the tube member 2 is pushed out of the distal end of the channel 102 (refer to
The operator brings the bending portion 3 into contact with the surface of a tissue T by moving the endoscope 100 in the body, moving the tube member 2 with respect to the endoscope 100, or operating the angle of the endoscope 100. For example, as shown in
Since the bending portion 3 has a bent shape, the distal end 2a of the tube member 2 is directed to a direction away from the surface of the tissue T in any orientations shown in
If the bending portion 3 is pressed against the surface of the tissue T, the pliable tissue T is be pushed and deformed by the bending portion 3, and as shown in
A liquid in the body may be dammed by pleats in the surface of the tissue T. If the above depression X is formed by the bending portion 3, the pleats of the tissue T is smoothed out, whereby a liquid in the body is gathered in the depression X.
Additionally, as a method of forming the depression X, there is also a method of using the restoring force of the bending portion 3. Specifically, there is a method of forming the depression X when the bending portion 3 is restored to its original bent shape while pressing the tissue T. According to this method, even in a narrow lumen tissue where the angle of the endoscope 100 cannot be operated, the depression X can be formed in the surface of the tissue T and a liquid can be accumulated.
Moreover, if the pressing force with which the pressing surface 4a presses the tissue T is also used together by the restoring force of the aforementioned bending portion 3 when the bending portion 3 is pressed against the surface of the tissue T by the angle operation of the endoscope 100, the depression X can be formed with a larger force. This enables the depression X to be also formed on the surface of the fiberized hard tissue T, for example.
The operator can move the bending portion 3 along the surface of the tissue Tin a state where the bending portion 3 is pressed against the surface of the tissue T if necessary. Accordingly, the pleats of the tissue T can be smoothed and a liquid can be moved to a desired position. At this time, since the outside surface of the bend of the bending portion 3 is a smooth surface without the opening formed at the distal end 2a of the tube member 2 or the openings of the through holes 4, there is no concern that the tissue T is damaged.
The operator tows the plunger 12 with respect to the syringe 11 as shown in
If all or a required amount of liquid is collected into the syringe 11, the tube member 2 is removed from the channel 102. Thereafter, if the observation or the like using the endoscope 100 is completed, the endoscope 100 is removed from the inside of the body. The endoscope 100 and the tube member 2 may be integrally removed from the inside of the body.
As described above, according to the endoscopic device 1 of the present embodiment, the surface directed to the outer side of the bend in the external surfaces of the bending portion 3 is pressed against the tissue T, so that the depression X can be formed in the tissue T and a liquid can be collected through the through holes 4 on the inner side of the bend. As a result, since a liquid can be collected in the depression X, the liquid can be efficiently collected.
Additionally, since the bending portion 3 of the tube member 2 are formed with the through holes 4, all the through holes 4 can be arranged in the depression X. For this reason, when a liquid is gathered within the depression X, the openings of substantially all the through holes 4 are located below the level of the liquid. As a result, the amount of the external air that is suctioned through the through holes 4 can be suppressed to be low, and the suction efficiency of a liquid can be enhanced. Moreover, since the through holes 4 opens to the inner side of the bend of the bending portion 3, the openings of the through holes 4 are not closed by the tissue T, and a liquid can be efficiently collected. Additionally, according to the endoscopic device 1 of the present embodiment, the tissue T can also be prevented from being suctioned through the through holes 4.
In addition, the endoscopic device 1 of the present embodiment can favorably collect liquids accumulated in lumen tissues, such as an alimentary canal, a bile duct, a blood vessel, and a ureter, or saccate regions, such as a cyst Additionally, according to the endoscopic device 1 of the present embodiment, even in regions other than the aforementioned tissues, liquids adhering to the tissue T that has pliability can be collected.
In addition, in the present embodiment, the endoscope 100 has been described as an example as the delivery instrument. However, if the delivery instrument is an instrument that can perform delivery to the inside of the body, such as an overtube, the delivery instrument is not particularly limited.
A modified example of the endoscopic device 1 of the above-described first embodiment will be described.
As shown in
The connection port 5 includes a first connection port 5a that protrudes toward a proximal end side of the operating portion 6, and a second connection port 5b that protrudes toward a side of the operating portion 6. In the present modified example, the first connection port 5a has a cylindrical shape that is coaxial with the passage 7, and the second connection port 5b has a cylindrical shape that branches from the passage 7 and opens to an external surface of the operating portion 6. The first connection port 5a and the second connection port 5b have a configuration in which the syringe 11 can be attached to any of the connection ports. Additionally, the first connection port 5a and the second connection port 5b have a configuration in which the connection ports can be closed by a cap 5c when not used.
As shown in
As shown in
The connection port 5 provided in the operating portion 6 branches from the passage 7, and opens to an external surface of the operating portion 6.
As shown in
As shown in
In the present modified example, the operator passes the stylet W to the distal end 2a of the tube member 2 via the passage 7 of the operating portion 6 before the tube member 2 is inserted through the channel 102. Accordingly, the bending portion 3 is bought into a linear state by the stylet W, and the rigidity thereof is made higher than that of the tube member 2 itself by the stylet W. For this reason, the distal end 2a and the bending portion 3 of the tube member 2 is easily inserted into the channel 102.
Additionally, in the bending portion 3, the distal end of the stylet W is advanced to the opening formed at the distal end 2a of the tube member 2 along the surface located on the outer side of the bend in the inner surface of the bending portion 3. In the case of the present modified example, the through holes 4 formed in the bending portion 3 open to the inner side of the bend. Thus, the distal end of the stylet W is not caught in the through holes 4, and the stylet W does not come out of the through holes 4.
After the distal end 2a of the tube member 2 is exposed from the distal end of the channel 102, the stylet W is removed from the tube member 2. Accordingly, the bending portion 3 is brought into the original bent state even by the restoring force of the bending portion 3.
Thereafter, a liquid in the body can be collected, similar to the above-described first embodiment
Next, an endoscopic device of a second embodiment of the present invention will be described.
The curved portion 8 is arranged at a position where the curved portion comes out of the distal end of the channel 102 in a state where the endoscopic device 1A is attached to the channel 102 of the endoscope 100.
By forming the curved portion 8, the bending portion 3 is directed to a direction that intersects the central axis O2 of the channel 102 in a state where the endoscopic device 1A is combined with the endoscope 100.
The operation of the endoscopic device 1A of the present embodiment will be described.
When the endoscopic device 1A is used, the operator inserts the tube member 2 into the channel 102 from its distal end, similar to the above-described first embodiment
In a state where the distal end 2a of the tube member 2 protrudes from the distal end of the channel 102, the bending portion 3 and the curved portion 8 are restored to their original shapes, respectively.
Since the bending portion 3 is directed to a direction that intersects the central axis O2 of the channel 102 by the curved portion 8, even when there is not sufficient space where an insertion portion 101 of the endoscope 100 is moved, the depression X (refer to
In addition, in the case of the present embodiment, a large depression X can be formed by greatly setting the curvature of the curved portion 8 or greatly setting the length between the bending portion 3 and the curved portion 8.
Next, a modified example of the endoscopic device 1A of the present embodiment will be described.
As shown in
According to the configuration as in the present modified example, the orientation of the bending portion 3 of the present modified example can be brought into a orientation in which this bending orientation is moved parallel to the bending portion 3 described in the above-described first embodiment.
Next, an endoscopic device of a third embodiment of the present invention will be described.
As shown in
The positional relationship between the central axis O1 of the tube member 2 closer to the proximal end side than the bending portion 3A formed in the conical coil shape and a centerline L1 of the bending portion 3A is an intersecting or twisted position. In other words, the centerline L1 of the bending portion 3A is arranged at a position where the centerline is twisted with respect to the central axis O1 of the tube member 2.
In the present embodiment, the openings of the through holes 4 formed in the bending portion 3A are directed to the inner side of the bend or to the centerline L1 side.
The operation of the endoscopic device 1B of the present embodiment will be described.
The bending portion 3A is brought into a state where the bending portion protrudes from the distal end of the channel 102 in a state where the endoscopic device 1B is inserted through the channel 102 of the endoscope 100.
At this time, the distal end of the bending portion 3A extends spirally toward a direction that intersects the central axis O2 of the channel 102. The operator presses the bending portion 3A against the surface of the tissue T and forms the depression X in the tissue T, similar to the above-described first embodiment (refer to
The shape of the depression X formed in the tissue T by the bending portion 3A is a shape along an envelope that connects the external surface of the bending portion 3A. A liquid in the vicinity of the depression X is gathered in the depression X. Since the bending portion 3A is formed in a conical coil shape, the bending portion 3A may be slightly pushed back in the direction of the centerline L1 by the repulsive force of the tissue T.
Most of the through holes 4 formed in the bending portion 3A are located within the liquid without touching the tissue T inside the depression X. For this reason, the liquid can be suctioned through the through holes 4 and can be collected within the syringe 11 (refer to
As described above, according to the endoscopic device 113 of the present embodiment, a large depression X can be formed in the tissue T. Additionally, since the bending portion 3A deforms due to the repulsive force of the tissue T, the depression X can be formed without damaging the tissue T even in the tissue T where a hard portion and a soft portion coexist.
The positional relationship (positional relationship between the central axis O1 of the tube member 2 and the centerline L1 of the bending portion 3A) between the centerline L1 of the bending portion 3A to the central axis O1 of the tube member 2 may be intersecting or orthogonal.
Next, an endoscopic device of a fourth embodiment of the present invention will be described.
As shown in
A distal end portion and a proximal end portion of the bending portion 3B are located on the central axis O1 of the tube member 2, and the bending portion 3B is formed in a bent shape that has a peak P1 at a position that is eccentric by a predetermined distance from the central axis O1 of the tube member 2 in an intermediate portion. Additionally, in the present embodiment, the opening of the distal end 2a of the tube member 2 is closed. The above predetermined distance is set on the basis of the size of a tissue that is a target from which a liquid is collected. For example, when a liquid is collected within a lumen tissue T1, the predetermined distance is set to about a distance such that the peak P1 of the bending portion 3B presses the inner surface of the lumen tissue T1 in a state where the distal end portion and proximal end portion of the bending portion 3B are located on the central axis O3 of the lumen tissue T1, that is, to a dimension slightly larger than the radius of the lumen tissue T1.
The balloon 9 is formed from a stretchable member that inflates if a fluid flows thereinto. The balloon 9 is provided with an operation tube 9a that communicates with the inside of the balloon 9. The operation tube 9a extends to the proximal end 2b side parallel to the tube member 2.
The maximum diameter when a fluid flows into the balloon 9 is set on the basis of the size of a tissue that is a target from which a liquid is collected. For example, when a liquid is collected within the lumen tissue T1, the maximum diameter is set so as to be larger than the internal diameter of the lumen tissue T1 when the balloon 9 has inflated within the lumen tissue T1.
The operation of the endoscopic device 1C of the present embodiment will be described.
The endoscopic device 1C of the present embodiment is configured so that a liquid can be favorably collected within the lumen tissue T1. Specifically, when the endoscopic device 1C is used, the bending portion 3B is guided to a region where a liquid is collected within the lumen tissue T1. Subsequently, if the operator inflates the balloon 9, the balloon 9 inflates larger than the internal diameter of the lumen tissue T1, and the inner surface of the lumen tissue T1 is pressed. Accordingly, the lumen tissue T1 is brought into a blocked state by the balloon 9, and a portion closer to the proximal end side than the balloon 9 is brought into a state where a liquid in the body does not flow thereinto. Moreover, as the balloon 9 and the lumen tissue T1 abut against each other, the proximal end and distal end of the bending portion 3B are positioned on the central axis O3 of the lumen tissue T1, respectively.
The operator rotates the tube member 2 around the central axis O1 of the tube member 2 as a rotation center. If the proximal end of the tube member 2 is rotated around the central axis O1 outside the body, a rotative force is transmitted to the distal end of the tube member 2, and the bending portion 3B also rotate around the central axis O1 of the tube member 2. The surface directed to the outer side of the bend in the external surface of the bending portion 3B comes into contact with the inner surface of the lumen tissue T1, and the depression X is formed in this contact place. As the bending portion 3B rotates around the central axis O1, the position of the depression X on the inner surface of the lumen tissue T1 varies gradually, pleats are smoothed, and the liquid is collected.
If the liquid is collected in the depression X, the liquid can be collected within the syringe 11 (refer to
According to the endoscopic device 1C of the present embodiment, a liquid can be efficiently collected while preventing the liquid from flowing into the proximal end side of the tube member 2.
Another balloon may be arranged at the distal end of the bending portion 3B in addition to the proximal end of the bending portion 3B. In this case, a region where the liquid is collected can be limited to between the proximal end side and the distal end side of the bending portion 3B. As a method of using an endoscopic device including the balloon 9 and the other balloon, for example, an example in which bile is collected from the inside of the duodenum to the outside of the body can be mentioned. That is, by arranging the base-end-side balloon 9 on the upstream side of duodenal papilla and arranging the other balloon on the downstream side of the duodenal papilla, bile can be prevented from flowing into other portions within the duodenum from the vicinity of the duodenal papilla.
While preferred embodiments of the present invention have been described and illustrated above, it should be understood that these are exemplary of the present invention and are not to be considered as limiting. Additions, omissions, substitutions, and other modifications can be made without departing from the concept of the present invention. The present invention is not to be considered as being limited by the foregoing description, and is limited only by the scope of the appended claims.
For example, the distal end 2a of the tube member 2 does not necessarily opens. For example, as shown in
Additionally, the bending portion 3 may have a predetermined restoring force that bends the bending portion such that the through hole 4 is directed to the inner side of the bend of the bending portion 3.
Additionally, the bending portion 3 may be spirally formed.
| Number | Date | Country | |
|---|---|---|---|
| 61572286 | Aug 2011 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/JP2012/070116 | Aug 2012 | US |
| Child | 13903425 | US |
