Patent Application
20240074777
All publications and patent applications mentioned in this specification are herein incorporated by reference in their entirety to the same extent as if each individual publication or patent application was specifically and individually indicated to be incorporated by reference.
The present disclosure relates to the field of medical instruments, in particular to a driving handle, an apparatus and a method for recapturing an implant.
For patients with high-risk heart valve diseases, a heart valve prosthesis is implanted into a native valve site through a catheter, and the newly-implanted valve prosthesis replaces the native valve to perform a physiological function after it is completely released, which is an effective means to treat the heart valve diseases.
The heart valve prosthesis is one of the implants. In the event that the implant is improperly sized during surgery or the implant is damaged during implantation, resulting in the implant becoming unsuitable for the patient's physiological anatomy, the medical staff need to take the implants out of the human body and re-implant new implants.
In order to recapture the implant, it is generally necessary to use a recapturing apparatus, which usually comprises a recapturing tube, a sheath tube and a handle. A recapturing net for capturing the implant is connected to a distal end of the recapturing tube, and the sheath tube sleeves outside the recapturing tube, and both the sheath tube and the recapturing tube are connected with the handle. Firstly, the distal end of the recapturing tube and the recapturing net are moved to the outside of the sheath tube by operating the handle to move the sheath tube and recapturing tube; then, the recapturing net is unfolded to capture the implant to be recaptured. After the recapturing net has captured the implant, the recapturing net wraps around the implant. The implant can also be pulled into the sheath tube together with the recapturing tube by operating the handle. When the recapturing net enters the sheath tube, it is gradually reduced by the constraint of the sheath tube, so that it is convenient to recapture the implant.
As shown in
When recapturing larger implants, such as larger-sized heart valve prostheses, there is a problem in that it is difficult to accommodate the implant due to the smaller inner diameter of the sheath tube. In this case, since the inner diameter of the catheter sheath is larger than that of the sheath tube, the recapturing tube and the sheath tube can be pulled proximally after the expanded recapturing net captures the heart valve prosthesis to be recaptured, and simultaneously a delivery device (e.g., a positioning guide wire) connected to the heart valve prosthesis is pulled, to pull the recapturing net and the heart valve prosthesis directly into the catheter sheath. The recapturing net is gradually reduced by the constraint of the catheter sheath as it enters the catheter sheath. The heart valve prosthesis is wrapped tightly and pulled into the catheter sheath until the recapturing tube and heart valve prosthesis are pulled out of the body.
However, when the recapturing net that has captured the heart valve prosthesis is drawn into the catheter sheath, the resistance is relatively large, and the pulling force that needs to be applied to the recapturing tube and the sheath tube is relatively high.
An object of the present disclosure is to provide a driving handle for recapturing an implant, a recapturing apparatus including the driving handle and a recapturing method of recapturing an implant by using the recapturing apparatus, so as to alleviate the technical problem of difficult recapturing operation due to relatively high resistance when recapturing the implant.
The present disclosure provides a driving handle for recapturing an implant that may include a first slider, a second slider, a fixing barrel, and a movable barrel. The first slider and the second slider are distributed in a longitudinal direction. The fixing barrel defines a tube passage that receives the first slider and the second slider. The movable barrel sleeves on the fixing barrel. Wherein the movable barrel is configured to move spirally along the fixing barrel during at least a portion of a stroke to drive the first slider and the second slider to move synchronously and linearly along the tube passage. Alternatively, the movable barrel may move spirally along the fixing barrel over the entire stroke. Alternatively, the movable barrel may move linearly along the fixing barrel during a portion of the stroke and move spirally along the fixing barrel during another portion of the stroke.
Alternatively, the fixing barrel is provided with a first outer spiral groove, and the at least a portion of the stroke is defined by at least a portion of the first outer spiral groove. For example, the length of the first outer spiral groove may be set to correspond only to the stroke of the synchronous linear motion of the second slider and the first slider. As another example, the length of the first outer spiral groove may also be set to correspond to a partial stroke of the first slider before the first slider engages with the second slider as well as the stroke of synchronous linear motion of the first slider and the second slider. The movable barrel is connected with the first slider, and is provided with an inner protrusion. The inner protrusion is configured to be movable along the first outer spiral groove to guide spiral motion of the movable barrel. Preferably, the inner protrusion is configured as an inner spiral rib. Alternatively, the fixing barrel is provided with a first outer spiral groove, and the at least a portion of the stroke is defined by at least a portion of the first outer spiral groove. Preferably, the movable barrel is connected with the first slider. The movable barrel is provided with an inner protrusion. The spiral motion of the movable barrel causes the inner protrusion to move along the first outer spiral groove to produce the linear motion during the at least a portion of the stroke.
Alternatively, the movable barrel moves linearly along the fixing barrel during a portion of the stroke and move spirally along the fixing barrel during another portion of the stroke. For example, the outer wall of the fixing barrel is provided with a sliding cylindrical surface. The sliding cylindrical surface and the first outer spiral groove are sequentially distributed along the recapturing direction. The sliding cylindrical surface is adapted for the movement of the inner protrusion along the longitudinal direction. Preferably, the sliding cylindrical surface is provided with a longitudinal elongated rib extending in the longitudinal direction.
Alternatively, the movable barrel moves spirally along the fixing barrel over the entire stroke. For example, the outer wall of the fixing barrel is provided with a second outer spiral groove. The second outer spiral groove and the first outer spiral groove are sequentially distributed along the recapturing direction. The screw pitch of the second outer spiral groove is greater than that of the first outer spiral groove. Preferably, the inner protrusion is configured as a ball.
Preferably, the fixing barrel is provided with a first line-type groove extending in the longitudinal direction. The first slider is provided with a first slider bump extending to protrude out of the first line-type groove. The movable barrel is provided with an annular groove configured to receive the first slider bump and to allow the annular groove to be rotatable relative to the first slider bump. Alternatively, the second slider is provided with a second slider bump which extends to protrude out of the first line-type groove. In some embodiments, the movable barrel comprises a barrel body and a ring body fixedly connected to the inner side of the barrel body, and the inner protrusion is provided on the ring body.
Preferably, the first slider is a sheath tube piston, the second slider is a net piston, and the sheath tube piston and the net piston are sequentially distributed in the recapturing direction. The net piston is provided with a flexible member, and the side wall of the fixing barrel is provided with a limiting groove. The limiting groove is configured to be able to receive the flexible member to limit movement of the net piston relative to the fixing barrel in the recapturing direction. The sheath tube piston is connected with a sheath tube piston cap. The sheath tube piston cap is provided at one end of the sheath tube piston that is close to the net piston. The sheath tube piston cap is configured to be suitable for disengaging the flexible member from the limiting groove to release the limitation.
Preferably, the inner wall of the fixing barrel is provided with a limiting step, and the limiting step can limit the movement of the net piston in the reverse direction of the recapturing direction. In particular, the limiting step limits the movement of the net piston in the reverse direction of the recapturing direction when being abutted by the net piston.
The present disclosure provides another driving handle for recapturing an implant, the driving handle includes a first slider, a second slider, a first fixing barrel, a first movable barrel and a second movable barrel. The first slider and the second slider are distributed in a longitudinal direction. The first fixing barrel defines a tube passage that is configured to receive the first slider and the second slider. The first movable barrel and the second movable barrel sleeve outside the first fixing barrel at an interval. Wherein the first movable barrel is configured to rotatably move relative to the first fixing barrel in a first stroke stage to drive the first slider to move linearly, and the second movable barrel is configured to rotatably move relative to the first fixing barrel during at least a portion of a second stroke stage to drive the second slider and the first slider to move synchronously and linearly. For example, the entire stroke of the synchronous linear motion of the second slider and the first slider may be entirely produced by the driving of the second movable barrel, or one portion of the stroke of the synchronous linear motion is produced by the driving of the first movable barrel and the other portion of the stroke is produced by the driving of the second movable barrel.
Alternatively, the entire stroke of the synchronous linear motion of the second slider and the first slider may be entirely produced by the driving of the second movable barrel. Preferably, the first fixing barrel is provided with a second line-type groove in the longitudinal direction, the first slider is provided with a first outer protrusion, the second slider is provided with a second outer protrusion, the first outer protrusion and the second outer protrusion extend to protrude out of the second line-type groove. Preferably, the first movable barrel is provided with a first inner spiral groove, and the second movable barrel is provided with a second inner spiral groove. The rotational motion of the first movable barrel causes the first inner spiral groove to cooperate with the first outer protrusion to produce a linear motion during the first stroke stage. The rotational motion of the second movable barrel causes the second inner spiral groove to cooperate with the second outer protrusion to produce a synchronous linear motion during the second stroke stage. Preferably, the first outer protrusion is configured as a first outer spiral rib that cooperates with the first inner spiral groove, and the second outer protrusion is configured as a second outer spiral rib that cooperates with the second inner spiral groove. Preferably, the screw pitch of the second inner spiral groove is smaller than that of the first inner spiral groove.
Preferably, the first slider is provided with a longitudinal through hole and a rotatable locking ring, and a locking ring inner bump is provided on the inner side of the locking ring. Preferably, the second slider is provided with a second claw, and the second claw is adapted to pass through the longitudinal through hole during engagement of the first slider with the second slider. Preferably, a rotatable knob is arranged outside the first fixing barrel, and rotation of the knob causes the locking ring to rotate so that the locking ring inner bump engages the second claw. Alternatively, the first slider is provided with a first claw which is in rotatable engagement with the locking ring inner bump. Alternatively, an arc-shaped groove is provided on an inner side of the locking ring or an end surface of the locking ring close to the first slider. The first slider is provided with a convex portion adapted to the arc-shaped groove, and the convex portion is rotatably engaged with the arc-shaped groove.
Preferably, the first slider is a sheath tube piston and the second slider is a net piston. The handle further includes a second fixing barrel, and the second fixing barrel sleeves fixedly outside the first fixing barrel. A proximal end of the first movable barrel and a distal end of the second movable barrel are rotatably fixed between the first fixing barrel and the second fixing barrel. Preferably, the knob sleeves outside the second fixing barrel and is provided with a knob bump. The side wall of the second fixing barrel is provided with a knob through hole through which the knob bump passes. Preferably, the locking ring, the sheath tube piston and the net piston are all disposed within the first fixing barrel, and the first fixing barrel is provided with a third line-type groove extending in the longitudinal direction. A locking ring outer bump is provided on the outer side of the locking ring, and the locking ring outer bump extends to protrude out of the third line-type groove. The locking ring outer bump and the knob bump cooperate in a manner of a groove tenon to realize the engagement of the locking ring and the knob. Alternatively, the locking ring outer bump is provided with a protrusion, and a groove is arranged on the knob bump. Alternatively, the locking ring outer bump is provided with a groove, and a protrusion is arranged on the knob bump.
The present disclosure further provides an implant recapturing apparatus, comprising a recapturing net, a recapturing tube, a sheath tube and the driving handle for recapturing an implant as described above. Preferably, the recapturing tube and the sheath tube are slidably disposed within the tube passage. Preferably, the sheath tube sleeves outside the recapturing tube, and the distal end of the recapturing tube is connected with the recapturing net. Preferably, the proximal end of the sheath tube is connected with the first slider and the proximal end of the recapturing tube is connected with the second slider.
The present disclosure provides an implant recapturing method, comprising: providing an implant recapturing apparatus which includes a driving handle for recapturing an implant, a recapturing net, a recapturing tube and a sheath tube, the handle including a movable barrel; pulling or rotating the movable barrel to drive the sheath tube to move proximally, thereby releasing and unfolding the recapturing net at the distal end of the recapturing tube; and rotating the movable barrel to drive the recapturing tube, the recapturing net, the implant, and the sheath tube together to move proximally into the catheter sheath.
The present disclosure further provides an implant recapturing method, comprising: providing an implant recapturing apparatus which includes a driving handle for recapturing an implant, a recapturing net, a recapturing tube and a sheath tube, the handle including a first movable barrel and a second movable barrel; rotating the first movable barrel to drive the sheath tube to move proximally, thereby releasing and unfolding the recapturing net at the distal end of the recapturing tube; and rotating the second movable barrel to drive the recapturing tube, the recapturing net, the implant, and the sheath tube together to move proximally into the catheter sheath.
The present disclosure has the following features and advantages:
In order to more clearly explain the technical solution in the embodiments of the present disclosure, drawings that need to be used in description of the embodiments will be simply introduced below. Obviously the drawings in the following description are merely some examples of the present disclosure. For persons ordinarily skilled in the art, it is also possible to obtain other drawings according to these drawings without making creative efforts.
Hereinafter the technical solution in the embodiments of the present disclosure will be described clearly and completely in combination with the accompanying drawings in the embodiments of the present disclosure, and obviously the described embodiments are merely part of the embodiments, not all of the embodiments. Any other embodiment obtained by those skilled in the art based on the embodiments of the present disclosure without paying any creative labor fall within the protection scope of the present disclosure.
With reference to a driving handle for recapturing an implant shown in
The driving handle for recapturing an implant is applied to the surgery of recapturing the implant via a catheter. The first slider 70 acts as a sheath tube piston and the second slider 60 acts as the net piston. The sheath tube 11 sleeves outside the recapturing tube 12, and the proximal end of the recapturing tube 12 extends beyond the proximal end of the sheath tube 11. The sheath tube 11 and the recapturing tube 12 both pass through the tube passage 201 and are both movable within the tube passage 201. The sheath tube 11 is fixedly connected to a sheath tube piston, and the recapturing tube 12 is fixedly connected to the net piston. The recapturing tube 12 and the sheath tube 11 are capable of inserting from the proximal end of the fixing barrel 20, passing out from the distal end of the fixing barrel 20, and entering the blood vessel. The recapturing direction 200 is parallel to the longitudinal direction of the fixing barrel 20, in particular the direction in which the distal end of the fixing barrel 20 points towards the proximal end thereof. The proximal and distal ends are defined in a conventional manner of an implantation surgery, with the operator as the reference object, i.e. with the end close to the operator being the proximal end and the end remote from the operator being the distal end. The first slider 70 and the second slider 60 are sequentially distributed from distal to proximal along the recapturing direction 200.
In some embodiments, with reference to
With reference to
Continuing with reference to
With reference to
The driving handle for recapturing an implant can convert the spiral motion of the movable barrel 30 into longitudinal linear motion of the first slider 70 and the second slider 60 through the cooperation of the inner protrusion 522 of the movable barrel 30 with the first outer spiral groove 521 of the fixing barrel 20, and the cooperation between the annular groove 31 of the movable barrel 30 and the first slider bump 71, thereby providing a driving force to the sheath tube 11 and recapturing tube 12. The handle allows the operator to apply a large longitudinal force to the second slider 60, to drive the second slider 60 and the recapturing tube 12 to move in the recapturing direction 200, in order to smoothly pull the recapturing tube 12, the recapturing net 121 (referring to
With reference to
In some embodiments, the movement speed required by the movable barrel 30 in the first stroke stage is the same as that required in the second stroke stage. In some embodiments, the movement speed required by the movable barrel 30 during at least a portion of the first stroke stage is greater than the movement speed during the second stroke stage. In some embodiments, the movement speed required by the movable barrel 30 in the initial stage of the second stroke stage is similar to that of the first stroke stage.
In some embodiments, the length of the first outer spiral groove 521 is sufficiently long. In both the first and second stroke stages, the inner protrusion 522 engages the first outer spiral groove 521 in the entire strokes. In this case, in both stroke stages, the driving handle for recapturing an implant converts the spiral motion of the movable barrel 30 into longitudinal motion of the first slider 70, and also converts the spiral motion of the movable barrel 30 into synchronous longitudinal motion of the second slider 60 with the first slider 70 in the second stroke stage.
In other embodiments, the outer wall of the fixing barrel 20 may be provided with an inner protrusion mating structure. The inner protrusion mating structure and the first outer spiral groove 521 are distributed in sequence from distal to proximal in the recapturing direction 200.
Specifically, in some embodiments, the first outer spiral groove 521 is disposed corresponding to the second stroke stage, or the first outer spiral groove 521 is disposed corresponding to the second stroke stage and the end portion of the first stroke stage. The inner protrusion 522 on the movable barrel 30 moves in the longitudinal direction of the fixing barrel 20, and during at least one portion of the first stroke stage, the inner protrusion 522 may mate with the inner protrusion mating structure. In the second stroke stage, the inner protrusion 522 may mate with the first outer spiral groove 521. By providing such inner protrusion mating structure, the movement speed of the movable barrel 30 during at least a portion of the first stroke stage may be greater than the movement speed during the second stroke stage.
In other embodiments, the inner protrusion mating structure corresponds to the initial stage of the second stroke stage and the first stroke stage. By providing such inner protrusion mating structure, the movable barrel 30 may obtain a larger movement speed in both the first stroke stage and the initial stage of the second stroke stage.
In a preferred embodiment, the inner protrusion mating structure is disposed corresponding to the first stroke stage, and the first outer spiral groove 521 is disposed corresponding to the second stroke stage. In the first stroke stage, the movable barrel 30 provides a driving force to the first slider 70, the first slider 70 drives the sheath tube 11 to move proximally, the recapturing tube 12 remains stationary, and the distal end of the recapturing tube 12 and the recapturing net 121 are exposed from the distal end of the sheath tube 11, and the recapturing net 121 is released. In the second stoke stage, the first slider 70 moves together with the second slider 60, the movable barrel 30 provides a driving force for the movement of the first slider 70 and the second slider 60 through the cooperation of the inner protrusion 522 with the first outer spiral groove 521, so that the recapturing net 12 and the sheath tube 11 can both obtain a large longitudinal force, thus the recapturing net 121 and the captured implant are allowed to enter smoothly into the catheter sheath 15 as shown in
With reference to
Further, the sliding cylindrical surface 251 may be provided with a longitudinal elongated rib 252 extending in the longitudinal direction of the fixing barrel 20. As shown in
As shown in
With reference to
In some embodiments, the inner wall of the movable barrel 30 is provided with a plurality of inner spiral ribs 523, which are distributed at intervals in the circumferential direction. When the movable barrel 30 is rotated to a position where the longitudinal elongated rib 252 is positioned between two adjacent inner spiral ribs 523, the movable barrel 30 is in the unlocked state. Preferably, the number of the inner spiral ribs 523 is two. The central angle formed between the two inner spiral ribs 523 is 180°. There is an interval between the two inner spiral ribs 523. When the interval between the two inner spiral ribs 523 is rotated to be aligned with the longitudinal elongated rib 252, the movable barrel 30 is in the unlocked state.
In some embodiments, as shown in
In the case where the inner protrusion mating structure includes the sliding cylindrical surface 251, the inner protrusion 522 may be configured as an inner spiral structure engaged with the first outer spiral groove 521, and the inner spiral structure may slide on the sliding columnar surface 251. In other embodiments, as shown in
Specifically, with reference to
In some embodiments, the outer surface of the fixing barrel 20 is provided with only one outer spiral groove in the longitudinal direction, and the second ring body 332 is provide with a ball 524 which moves within the outer spiral groove. In other embodiments, the outer surface of the fixing barrel 20 is provided with several outer spiral grooves in the longitudinal direction, and the several outer spiral grooves are uniformly distributed at intervals in the circumferential direction of the fixing barrel 20. Accordingly, the second ring body 332 is provided with the same number of balls 524 as the number of the outer spiral grooves, and each ball 524 corresponds to one outer spiral groove. The plurality of balls 524 are arranged to cooperate with a plurality of outer spiral grooves on the fixing barrel 20, which is favorable for increasing the contact area of the balls 524 with the fixing barrel 20, is convenient for the movable barrel 30 to obtain a large driving force in the longitudinal direction of the fixing barrel 20 by rotating the movable cylinder 30. However, as the number of the outer spiral grooves increases, the outer spiral grooves are too close to each other so that the fixing barrel 20 may not be able to withstand a large torque. Therefore, preferably, as shown in
The structure of the inner protrusion 522 may have other embodiments. For example, the inner protrusion 522 may be a cylinder extending in the radial direction of the movable barrel 30. When the inner protrusion 522 moves into the first outer spiral groove 521, the cylindrical surface of the inner protrusion 522 is slidably engaged with the inner wall of the first outer spiral groove 521. When the inner protrusion 522 moves into the second outer spiral groove 26, it may also be slidably engaged with the inner wall of the second outer spiral groove 26.
As shown in
As shown in
As shown in
In some embodiments, the inner wall of the fixing barrel 20 is provided with a limiting step 27. The limiting step 27 is configured to limit movement of the second slider 60 in the reverse direction to the recapturing direction 200 when being abutted by the second slider 60. As shown in
Through the limiting step 27, the second slider 60 can be positioned, which is convenient for assembly. In the process of moving the second slider 60 in the reverse direction to the recapturing direction 200, at the same time when or after the flexible member 63 is snap fitted into the limiting groove 631, the second slider 60 abuts against the limiting step 27. The limiting step 27 and the flexible member 63 respectively limit the positions of the second slider 60 in two directions, so as to limit the position of the second slider 60.
In some embodiments, as shown in
In some embodiments, as shown in
In some embodiments, as shown in
In some embodiments, as shown in
Referring to
In some embodiments, such as the handle shown in
In other embodiments, the first movable barrel 40 is set to correspond to the initial stage of the second stroke stage and the first stroke stage. Accordingly, the first movable barrel 40 is configured to rotatably move with respect to the first fixing barrel 28 in the first stroke stage to drive the first slider 70 to produce a linear motion, and to rotatably move with respect to the first fixing barrel 28 during the initial stage of the second stroke stage to drive the second slider 60 and the first slider 70 to move synchronously and linearly. Accordingly, the second movable barrel 30 is configured to rotatably move with respect to the first fixing barrel 28 in the remaining stages other than the initial stage of the second stroke stage to drive the second slider 60 and the first slider 70 to move synchronously and linearly.
The driving handle for recapturing an implant is applied to the surgery of recapturing the implant via a catheter. The first slider 70 acts as a sheath tube piston and the second slider 60 acts as the net piston. The recapturing tube 12 and the sheath tube 11 can insert from the proximal end of the first fixing barrel 28, and pass out from the distal end of the first fixing barrel 28 and enter the blood vessel. The recapturing direction 200 is a direction in which the distal end of the first fixing barrel 28 is directed to the proximal end thereof. The proximal and distal ends are defined in a conventional manner of an implantation surgery, with the operator as the reference object, i.e. with the end close to the operator being the proximal end and the end remote from the operator being the distal end. The sheath tube piston 70 and the net piston 60 are sequentially distributed from distal to proximal in the recapturing direction 200.
In the driving handle for recapturing an implant shown in
Referring to
The driving handle for recapturing an implant can: convert rotational movement of the first movable barrel 40 into longitudinal movement of a first slider 70 through cooperation between the first inner spiral groove 41 of the first movable barrel 40, the first outer protrusion 42 of the first slider 70, and the second line-type groove 281; and can convert rotational movement of the second movable barrel 30 into longitudinal movement of the second slider 60 and the first slider 70 through cooperation between the second inner spiral groove 511 of the second movable barrel 30, the second outer protrusion 512 of the second slider 60, and the second line-type groove 281. By the foregoing cooperation, as shown in
In some embodiments, as shown in
In some embodiments, as shown in
In some embodiments, the screw pitch of the first inner spiral groove 41 is greater than that of the second inner spiral groove 511. The first inner spiral groove 41 corresponds to the first stroke stage as a fast section, and the second inner spiral groove 511 corresponds to the second stroke stage in as a slow section. Rotation of the first movable barrel 40 causes the sheath tube 11 to move in the recapturing direction 200 at a rapid speed during the first stroke stage so that the distal end of the recapturing net 121 and the recapturing net 121 are exposed from sheath tube 11 at the rapid speed. Rotation of the second movable barrel 30 causes the recapturing net 121 to move at a slow speed in the recapturing direction 200 during the second stroke stage, in order to provide a great pulling force to the recapturing tube 12 and the recapturing net 121, thus it is favorable to smoothly pull the recapturing net 121 into the catheter sheath 15 as shown in
In the case where the screw pitch of the first inner spiral groove 41 is greater than that of the second inner spiral groove 511, in other embodiments, the first inner spiral groove 41 on the first movable barrel 40 is sufficiently long. The first inner spiral groove 41 is arranged to correspond to the first stroke stage and the initial stage of the second stroke stage, and the second inner spiral groove 511 is arranged to correspond to the remaining stage except for the initial stage of the second stroke stage, and a faster movement speed than that in the remaining stage of the second stroke phase can be achieved in the first stroke phase and the initial stage of the second stroke phase.
Preferably, the number of the first outer protrusion 42 is of plural, and the plurality of first outer protrusions 42 are distributed at intervals along the longitudinal direction of the second fixing barrel 28 to increase the contact area of the first slider 70 with the first inner spiral groove 41, and this is convenient to apply a large driving force to the first slider 70. Similarly, the number of the second outer protrusions 512 is of plural to facilitate the application of a large driving force to the second slider 60.
The structure of the first outer protrusion 42 is not limited to the outer spiral rib 42. For example, the first outer protrusion 42 may also be a cylinder extending in the radial direction of the first movable barrel 40, and the cylinder extends into the first inner spiral groove 41. The cylindrical surface of the first outer protrusion 42 is slidably engaged with the inner wall of a first inner spiral groove 41. The structure of the second outer protrusion 512 is similar to this, and will not be described again.
As shown in
The first slider 70 is disposed within the first fixing barrel 28, the first slider 70 is provided with a first slider bump 71, the first slider bump 71 is slidably provided in the second line-type groove 281, the first outer protrusion 42 is disposed on the top of the first slider bump 71, and the first slider bump 71 protrudes out of the second line-type groove 281 so that the first outer protrusion 42 can contact and engage with the first inner spiral groove 41; and the first slider bump 71 moves in the longitudinal direction within the second line-type groove 281, and guides the movement of the first slider 70 within the first fixing barrel 28.
In some embodiments, as shown in
Specifically, with continued reference to
When recapturing the implant by using the driving handle for recapturing an implant, the first slider 70 first drives the sheath tube 11 to move in the recapturing direction 200 to release the recapturing net 121. After the recapturing net 121 captures the implant, both the recapturing tube 12 and the sheath tube 11 can move in the recapturing direction 200 to be pulled into the catheter sheath 15 as shown in
As shown in
As shown in
Specifically, as shown in
The locking ring 83 is rotatably provided on the first slider 70. The locking ring 83 is capable of moving together with the first slider 70, and it is able to rotate relative to the first slider 70. The locking ring 83 may be provided at a distal end side of the first slider 70. As shown in
Referring to
In some embodiments, as shown in
The locking ring outer bump 832 extends beyond the side wall of the first fixing barrel 28 through the third line-type groove 282. The knob bump 821 extends through the knob through hole 291 to the inner cavity of the second fixing barrel 29, so as to facilitate the engagement of the knob bump 821 and the locking ring outer bump 832. The third line-type groove 282 also serves to guide the movement of the locking ring outer bump 832 and the locking ring 83. In some embodiments, as shown in
The manner of engagement of the locking ring 83 with the first slider 70 is not limited to the above-described embodiment in which the first claw 812 cooperates with the locking ring inner bump 831, as long as the relative position of the locking ring 83 with respect to the first slider 70 in the longitudinal direction is limited and they are relatively rotatable about the axis. For example, the locking ring 83 is configured to provide an arc-shaped groove on its end surface facing the first slider 70. The first slider 70 is provided with a feature extending into the arc-shaped groove. The arc-shaped groove and the feature cooperate such that the locking ring 83 is rotatably disposed on the first slider 70. Specifically, the arc shape of the arc-shaped groove is an arc shape centering on the intersection point of the locking ring axis and the end face of the locking ring, and the central angle of this arc shape may be 60°. The feature may be a convex portion slidably disposed in the arc-shaped groove, and the convex portion is limited in the arc-shaped groove to keep the longitudinal movement of the locking ring 83 consistent with the longitudinal movement of the first slider 70. More specifically, the cross section of the arc-shaped groove may be T-shaped, and the convex portion may be a T-shaped block. In the above-described embodiment, the arc-shaped groove is provided on the end face of the locking ring 83 facing the first slider 70, and besides, the arc-shaped groove may also be provided on the inner side of the locking ring 83. The feature on the first slider 70 is arranged in a similar manner to cooperate with the arc-shaped groove. In this embodiment, when the locking ring 83 and the locking ring inner bump 831 are rotated, only the second claw 811 is engaged with the locking ring inner bump 831.
In addition to achieving the engagement of the first slider 70 with the second slider 60 by means of the locking ring 83, other means may also be used. For example, the proximal end of the first slider 70 is provided with a buckle, and the distal end of a second slider 60 is provided with a buckling groove for engaging with the buckle. When the first slider 70 moves close to the second slider 60, the buckle and the buckling groove are buckled together, so that the first slider 70 and the second slider 70 can be engaged.
It should be noted here that the handle does not necessarily include the second fixing barrel 29. When the handle includes only the first fixing barrel 28, the first fixing barrel 28 doesn't need to be provided with the fixed post 283. At this time, the knob 82 rotatably sleeves outside the first fixing barrel 28 relative to the first fixing barrel 28. Specifically, the knob 82 and the first fixing barrel 28 may be fixed through teeth-groove cooperation. In some embodiments, the spacer may be an arc-shaped bump provided in the middle portion of the outer peripheral wall of the first fixing barrel 28, for separating the first movable barrel 40 from the second movable barrel 30 and for longitudinally limiting the same. In some embodiments, peripheries of both the proximal end and the distal end of the first fixing barrel 28 may be removably provided with limiting rings. The spacer cooperates with the two limiting rings to further limit the longitudinal movement of the first movable barrel 40 and the second movable barrel 30.
The driving handle for recapturing an implant provided by the present disclosure has been described above. During at least part of the stroke in which the recapturing tube 12, the recapturing net 121 and the captured implant are pulled into the catheter sheath 15 as shown in
Accordingly, during at least part of the stroke in which the recapturing tube 12, the recapturing net 121 and the captured implant are pulled into the catheter sheath 15 as shown in
The driving handle for recapturing an implant may be applied to recapturing of a heart valve prosthesis in a catheter-implanted heart valve prosthetic procedure. The driving handle for recapturing an implant may also be applied to other procedures for recapturing implants or other procedures involving similar operation.
Implant Recapturing Apparatus
With reference to
In some embodiments, the recapturing apparatus further includes an inner tube 131 and a hemostatic valve device 132 disposed at the proximal end of the inner tube 131, and the inner tube 131 penetrates through the recapturing tube 12. In some cases, no catheter is provided outside the positioning guide wire to which the implant is connected, and the positioning guide wire penetrates through the inner tube 131 to extend out from the proximal end of the hemostatic valve device 132.
In some embodiments, as shown in
Implant Recapturing Method
The present disclosure provides an implant recapturing method using the above-described driving handle for recapturing an implant, wherein the catheter sheath 15 shown in
Specifically, when the implant is recaptured using the handle shown in
When the implant is recaptured using the handle shown in
When the implant is recaptured using the handle shown in
In the various steps S30 described above, as shown in
The longitudinal direction in the above embodiment specifically refers to the length direction of the handle. The foregoing are only several embodiments of the present disclosure, and those skilled in the art may make various modifications or variations to the embodiments of the present disclosure according to the disclosure of the application documents without departing from the spirit and scope of the present disclosure.
The present disclosure is a continuation application of International Application No. PCT/US2022/015759, filed Feb. 9, 2022, entitled “DRIVING HANDLE, APPARATUS AND METHOD FOR RECAPTURING AN IMPLANT”, which claims the benefit of U.S. Provisional Application No. 63/148,000, filed on Feb. 10, 2021, entitled “DRIVING HANDLE, APPARATUS AND METHOD FOR RECAPTURING AN IMPLANT”, the entire disclosures of which are incorporated herein by reference for all purposes.
| Number | Date | Country | |
|---|---|---|---|
| 63148000 | Feb 2021 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/US2022/015759 | Feb 2022 | US |
| Child | 18448063 | US |
