An electrode lead delivery system that facilitates cutting removal of a sheath

Abstract

The electrode lead conveying system for facilitating cutting and removing a sheath belongs to the technical field of cardiac pacemaker implantation, and comprises a conveying carrier with a shell and a movable sheath seat, a cutting assembly movably arranged in the shell, and a driving handle movably arranged on the shell and below the sheath seat. A rotatable clamping piece is arranged in the sheath seat. A plow-shaped cutting edge is arranged on the cutting assembly and faces the sheath seat. The driving handle is in transmission connection with the clamping piece and the cutting assembly. When the driving handle moves, the clamping piece can drive the sheath to be radially abutted against the inner wall of the through hole, so that the sheath seat can drive the sheath to move synchronously, and the cutting edge can be synchronously driven to be higher than the electrode lead in the sheath by at least one sheath wall thickness and lower than the electrode lead in the sheath. The sheath seat can be driven by the clamping piece to move towards the direction close to the cutting edge, so that the cutting edge cuts into the end of the sheath to realize the cutting and removal of the sheath. The operation can be performed by one hand, and the operation is simple, stable, difficult and low-risk.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of cardiac pacemaker implantation, and particularly relates to an electrode lead delivery system facilitating cutting and removing of a sheath tube. BACKGROUND

[0002] The implantation of a cardiac pacemaker includes the implantation of an electrode lead and the implantation of a pacing pulse generator, wherein the implantation of the electrode lead needs to use a guide sheath tube to establish an implantation channel and to position and support the electrode lead during implantation, and the guide sheath tube needs to be removed after the implantation of the electrode lead, but due to the large size of the pacing pulse generator connected to the tail end of the electrode lead, the guide sheath tube needs to be cut axially before being removed, and meanwhile, the position of the electrode lead needs to be ensured unchanged during the cutting and removing process.

[0003] The axial cutting of the existing guide sheath tube is mostly in the form of manual cutting, and during the operation, the doctor first cuts the knife axially into the end of the sheath tube, then holds it with one hand so that it cannot move, and then slowly and uniformly pulls the sheath tube axially with the other hand to cut it, and during the cutting, the cutting depth needs to be accurately controlled to avoid cutting the electrode lead, and during the pulling, the force applied to the sheath tube also needs to be accurately controlled to avoid pressing the electrode lead to cause the displacement or falling off of the pacing electrode, which has many influencing factors, requires high operation skill and proficiency of the doctor, and has high surgical risk. SUMMARY

[0004] The purpose of the present application is to overcome one or more shortcomings in the prior art and provide an electrode lead delivery system facilitating cutting and removing of a sheath tube.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present application is an electrode lead delivery system facilitating cutting and removing of a sheath tube, which comprises:

[0006] A delivery carrier has a hand gun-shaped shell and a sheath tube seat movably arranged in the shell, the sheath tube seat is provided with a through hole for penetrating the sheath tube, the moving direction of the sheath tube seat is the axial direction of the through hole, the sheath tube seat is provided with a rotatable clamping member, the clamping member has a clamping working position and a releasing working position, when the clamping member is in the clamping working position, the clamping member abuts the sheath tube along the radial direction on the inner wall of the through hole, so that the sheath tube seat can drive the sheath tube to move synchronously, and when the clamping member is in the releasing working position, the clamping member is separated from the sheath tube, and the sheath tube seat can move relative to the sheath tube;

[0007] A cutting assembly is movably arranged in the shell and located on one side of the sheath tube seat, the cutting assembly is provided with a plow-shaped blade opening towards the sheath tube seat, and the cutting assembly has an upper working position and a lower working position, when the cutting assembly is in the upper working position, the blade opening is at least one sheath tube wall thickness higher than the lower edge of the through hole and lower than the electrode lead in the sheath tube, and when the cutting assembly is in the lower working position, the blade opening is lower than the lower edge of the through hole;

[0008] a driving handle movably arranged on the housing and below the sheath seat, the driving handle being in transmission connection with the embracing member and the cutting assembly, when the driving handle moves, the embracing member can be driven to change to the embracing working position and the cutting assembly can be driven to change to the upper working position at the same time, and the sheath seat can be driven to move to the direction close to the blade edge by the embracing member changed to the embracing working position, so that the blade edge cuts into the end of the sheath to realize the cutting and removal of the sheath.

[0009] Preferably, the embracing member has a pressing strip located in the through hole and a rotating strip vertically connected to the end of the pressing strip, the pressing strip extends along the axial direction of the through hole and is arranged close to the inner wall of the through hole, and the end of the rotating strip penetrates the sheath seat along the radial direction of the through hole.

[0010] Further preferably, the surface of the pressing strip towards the axial line of the through hole is a circular arc surface matched with the outer wall surface of the sheath, and a plurality of convex rib-shaped clamping teeth extending in the circumferential direction are arranged on the circular arc surface.

[0011] Further preferably, an avoiding groove for avoiding the pressing strip is arranged on the sheath seat, the avoiding groove extends from the root of the pressing strip to the end thereof, the length of the avoiding groove is shorter than the length of the pressing strip, a notch matched with the end of the avoiding groove is arranged on the pressing strip, and the notch is located on the opposite side of the clamping teeth.

[0012] Further preferably, the rotating direction of the embracing member is perpendicular to the moving direction of the sheath seat, the moving direction of the driving handle is parallel to the moving direction of the sheath seat, and the driving handle is in transmission connection with the embracing member through a first transmission plate.

[0013] Further preferably, the first transmission plate is located below the sheath seat, the extending direction of the first transmission plate is parallel to the moving direction of the driving handle, the two ends of the first transmission plate are respectively in rotating connection with the upper end of the driving handle and the end of the rotating strip, and the rotating axial lines of the two ends of the first transmission plate are parallel.

[0014] Further preferably, the electrode lead conveying system further comprises a reset tension spring for driving the driving handle to reset, one end of the reset tension spring is connected to the inner wall of the housing, and the other end is connected to the rotating strip and / or the first transmission plate.

[0015] Further preferably, the electrode lead delivery system further comprises a safety assembly for preventing the driving handle from malfunctioning, the safety assembly comprising a safety plate connected to the driving handle, a safety pin inserted into the housing, the safety plate being arranged in parallel below the first transmission plate and extending to the side where the sheath seat is located, an enclosed circular hole being formed in the end of the safety plate, the safety pin being matched in size with the circular hole, the relative position of the driving handle and the housing being locked when the safety pin is inserted into the circular hole, and the driving handle being able to move relative to the housing when the safety pin is separated from the circular hole.

[0016] Further preferably, the end of the safety plate is further provided with a flat hole, one end of the flat hole penetrating through the outer wall surface of the end of the safety plate, and the other end being communicated with the circular hole, the extension direction of the flat hole being parallel to the moving direction of the driving handle, the midpoint of the width direction of the flat hole constituting a virtual plane passing through the axis of the circular hole, the safety pin being rotatably inserted into the housing, the inner end of the safety pin being flat, the thickness of the inner end being matched with the width of the flat hole, and the driving handle being able to move relative to the housing when the safety pin is rotated to be aligned with the flat hole.

[0017] Further preferably, the end of the safety pin is connected with a driving plate, the driving plate being located outside the housing, and the driving plate being rotated to drive the middle part of the safety pin to be aligned with the flat hole, the housing being further provided with a limiting structure for limiting the rotation angle of the driving plate, so that the rotation angle of the driving plate is 0-90 degrees.

[0018] Preferably, the cutting assembly comprises a cutting seat provided with a blade, both side walls of the cutting seat being provided with vertical sliding grooves, the inside of the housing being provided with a vertical convex rib, the vertical convex rib being slidably embedded in the vertical sliding grooves, so that the cutting seat is movably connected to the housing, the blade being arranged at the upper end of the cutting seat, and the driving handle being transmissionally connected to the cutting seat through a second transmission plate.

[0019] Further preferably, one end of the second transmission plate is connected to the driving handle, and the other end extends towards the cutting seat, the extension direction of the second transmission plate being parallel to the moving direction of the driving handle, the end of the second transmission plate close to the cutting seat being provided with a first inclined surface, and the lower end of the cutting seat being provided with a second inclined surface matched with the first inclined surface, the second inclined surface being slidably fitted with the first inclined surface, the second inclined surface being driven to move by the first inclined surface when the driving handle moves towards the cutting assembly, so as to lift the cutting seat upwards, and the cutting assembly is changed to the upper working position.

[0020] Further preferably, the second transmission plate is further provided with a circular-arc-shaped protrusion near the end of the cutting seat, and the circular-arc-shaped protrusion is connected to the first inclined surface in transition, and after the second inclined surface is disengaged from the circular-arc-shaped protrusion when the driving handle is moved towards the cutting assembly, the second inclined surface can be reset by moving along the circular-arc-shaped protrusion.

[0021] Further preferably, the inner wall of the shell is further provided with a transverse sliding groove, and the two sides of the second transmission plate are slidably embedded in the transverse sliding groove.

[0022] Further preferably, the side wall of the cutting seat is further provided with a limiting hole, a removable limiting pin is connected to the shell, and a locking spring is arranged to drive the limiting pin to be inserted inwards, and when the cutting assembly is moved upwards to the upper working position, the limiting hole is aligned with the limiting pin, the locking spring drives the limiting pin to be inserted inwards, the end of the limiting pin is inserted into the limiting hole, and the relative position between the cutting seat and the shell is locked.

[0023] Further preferably, the upper end of the cutting seat is provided with two side baffles, and a wire channel through which the electrode lead wire is inserted is formed between the two side baffles, and the blade is connected to the end of the two side baffles facing the sheath seat and blocks the wire channel.

[0024] Further preferably, the cutting assembly further comprises a wire pressing plate, and the wire pressing plate is movably arranged between the two side baffles, the lower end surface of the wire pressing plate comprises a flat surface close to the blade and an inclined surface away from the blade, the inclined surface extends downwardly away from the blade, when the wire pressing plate is moved towards the blade, the flat surface straightens the electrode lead wire in the wire channel, and the inclined surface presses the electrode lead wire in the wire channel to prevent the electrode lead wire from moving relative to the sheath.

[0025] Further preferably, the cutting assembly further comprises a driving rod for driving the wire pressing plate to move, one end of the driving rod is movably inserted into a matching hole in the cutting seat, and the other end is disengaged from the end of the wire pressing plate away from the blade, so as to guide the electrode lead wire passing through the wire channel to be drawn obliquely downward.

[0026] Further preferably, a matching groove is provided below the matching hole and penetrates the matching hole, a clamping compression spring is arranged in the matching groove, the end of the driving rod has a downwardly extending resisting portion, and the two ends of the clamping compression spring are respectively abutted against the resisting portion and the side wall of the matching groove, and the clamping compression spring has a tendency to drive the driving rod to move the wire pressing plate towards the blade.

[0027] Preferably, the housing has an obliquely extending holding section and a mounting section connected to the upper end of the holding section, the sheath seat is connected to the front end of the mounting section, the cutting assembly is connected to the rear end of the mounting section and is located above the holding section, the driving handle is connected to one side of the holding section towards the sheath seat, and the blade can cut into the end of the sheath to realize the cutting removal of the sheath when the driving handle moves towards the holding section.

[0028] Further preferably, the rear end of the mounting section is provided with a step, the horizontal surface of the step is provided with a downward extending accommodation groove for accommodating the cutting assembly, and the vertical surface of the step is provided with a through hole for the sheath to pass through, the through hole is coaxially arranged with the through hole, and a guide seat for guiding the sheath and a hemostasis valve for hemostasis are inserted on the through hole.

[0029] Further preferably, the sheath is a bendable sheath which comprises a first bending section and a second bending section connected in sequence, the first bending section is a predetermined bending section, and the second bending section is located at one end of the first bending section towards the delivery carrier and is a adjustable bending section.

[0030] Further preferably, the connection between the second bending section and the first bending section is provided with a pull line ring, the sheath is provided with an adjustable bending pull line, one end of the adjustable bending pull line is connected with the pull line ring, and the other end is connected with an adjustable bending assembly arranged on the mounting section.

[0031] Further preferably, the adjustable bending assembly comprises an adjustable bending sleeve, an adjustable bending screw and an adjustable bending knob, the adjustable bending sleeve is composed of an oblique pipe section connected to the mounting section, the adjustable bending screw is arranged in the adjustable bending sleeve and connected with the end of the adjustable bending pull line, the adjustable bending knob is inserted into the end of the adjustable bending sleeve and threadedly connected with the adjustable bending screw, and rotating the adjustable bending knob can drive the adjustable bending screw to move up and down, thereby pulling the adjustable bending pull line and changing the bending state of the second bending section.

[0032] Further preferably, one side surface of the mounting section is provided with a wire exit outer groove, the wire exit outer groove penetrates the mounting section in the length direction, the sheath seat is provided with a wire exit inner groove corresponding to the wire exit outer groove, and the wire exit inner groove penetrates the sheath seat along the moving direction of the sheath seat.

[0033] Due to the use of the above technical scheme, the present application has the following advantages compared with the prior art:

[0034] The electrode lead wire conveying system for facilitating cutting and removing the sheath provided by the application comprises a conveying carrier with a shell and a sheath seat movably arranged in the shell, a cutting assembly movably arranged in the shell and located at one side of the sheath seat, and a driving handle movably arranged on the shell and below the sheath seat. The sheath seat is provided with a rotatable clamping member. The cutting assembly is provided with a plow-shaped blade facing the sheath seat. The driving handle is in transmission connection with the clamping member and the cutting assembly. When the driving handle moves, the clamping member can drive the sheath to abut against the inner wall of the through hole in the radial direction, so that the sheath seat can drive the sheath to move synchronously, and the blade of the cutting assembly can be driven to protrude from the lower edge of the through hole by at least one sheath wall thickness and below the electrode lead wire in the sheath. The sheath seat can also be driven by the clamping member to move towards the blade, so that the blade cuts into the end of the sheath to realize the cutting and removal of the sheath. The operation can be performed by one hand, and the operation is simple, stable, difficult and low-risk. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a perspective view of the preferred embodiment of the application.

[0036] Figure 2 is a left view of Figure 1 .

[0037] Figure 3 is a longitudinal section view of Figure 2 .

[0038] Figure 4 is an assembled and exploded view of Figure 1 with the sheath hidden.

[0039] Figure 5 is a partial enlarged view of the shell in Figure 3 .

[0040] Figure 6 is a perspective view of Figure 4 with the shell and other components hidden. The view angle is adjusted for observation.

[0041] Figure 7 is a partial enlarged view of the sheath seat and the driving handle in Figure 3 .

[0042] Figure 8 is a longitudinal section view of the sheath seat in Figure 7 .

[0043] Figure 9 is a sectional view of the A-A direction in Figure 2 .

[0044] Figure 10 is a partial enlarged view of the cutting assembly in Figure 2 .

[0045] Figure 11 is Figure 10 a perspective view.

[0046] Figure 12 is Figure 11 a perspective view after the sheath, electrode lead wire and cutting seat are hidden.

[0047] Wherein: 1. sheath; 2. electrode lead wire; 3. guide seat; 4. hemostatic valve; 5. first curved section; 6. second curved section; 11. housing; 11a. holding section; 11b. mounting section; 11c. lead wire exit outer groove; 111. limiting structure; 112. vertical protrusion; 113. transverse sliding groove; 114. limiting pin; 115. locking spring; 116. horizontal surface; 117. containing groove; 118. vertical surface; 119. through hole; 12. sheath seat; 121. through hole; 122. avoiding groove; 123. lead wire exit inner groove; 13. clamping member; 131. abutting strip; 132. rotating strip; 133. clamping tooth; 134. notch; 20. cutting assembly; 21. blade edge; 22. cutting seat; 221. vertical sliding groove; 222. side baffle; 223. lead wire passage; 224. second inclined surface; 225. limiting hole; 226. matching hole; 227. matching groove; 228. clamping compression spring; 23. wire pressing plate; 231. flat surface; 232. inclined surface; 24. driving rod; 241. resisting portion; 30. driving handle; 31. first transmission plate; 32. return tension spring; 33. safety plate; 331. round hole; 332. flat hole; 34. safety pin; 341. driving plate; 35. second transmission plate; 351. first inclined surface; 352. arc-shaped protrusion; 40. bending adjusting assembly; 41. bending adjusting sleeve; 42. bending adjusting screw; 43. bending adjusting knob. DETAILED DESCRIPTION

[0048] The up-down, front-back, left-right directions described in the present application are Figure 2 the up-down, left-right, inside-outside directions in the figure.

[0049] As Figures 1 to 12As shown, the electrode lead wire conveying system provided by the present application for facilitating cutting and removing the sheath tube comprises a conveying carrier, a cutting assembly 20, and a driving handle 30. The conveying carrier has a pistol-shaped shell 11 and a sheath tube seat 12 movably arranged in the shell 11. The sheath tube seat 12 is provided with a through hole 121 for penetrating the sheath tube 1. The through hole 121 extends in the front-rear direction. The moving direction of the sheath tube seat 12 is the axial direction of the through hole 121. The sheath tube seat 12 is provided with a rotatable clamping member 13. The clamping member 13 has a clamping working position and a loosening working position. When the clamping member 13 is in the clamping working position, the clamping member 13 abuts the sheath tube 1 along the radial direction against the inner wall of the through hole 121, so that the sheath tube seat 12 can drive the sheath tube 1 to move synchronously. When the clamping member 13 is in the loosening working position, the clamping member 13 is separated from the sheath tube 1, and the sheath tube seat 12 can move forward relative to the sheath tube 1. The cutting assembly 20 is movably arranged in the shell 11 and located at the rear side of the sheath tube seat 12. The cutting assembly 20 is provided with a plow-shaped blade 21 facing the sheath tube seat 12. The cutting assembly 20 has an upper working position and a lower working position. When the cutting assembly 20 is in the upper working position, the blade 21 is higher than the wall thickness of at least one sheath tube 1 and lower than the electrode lead wire 2 in the sheath tube 1. When the cutting assembly 20 is in the lower working position, the blade 21 is lower than the lower edge of the through hole 121. The driving handle 30 is movably arranged on the shell 11 and lower than the sheath tube seat 12. The driving handle 30 is in transmission connection with the clamping member 13 and the cutting assembly 20. When the driving handle 30 moves backward, the clamping member 13 can be driven to change to the clamping working position and synchronously drive the cutting assembly 20 to change to the upper working position. The sheath tube seat 12 can also be driven by the clamping member 13 in the clamping working position to move toward the blade 21 (move backward), so that the blade 21 cuts into the end of the sheath tube 1 to realize the cutting and removal of the sheath tube 1.

[0050] The advantages of such arrangement are that the doctor can perform the cutting and removal operation of the sheath tube 1 with one hand, only needs to move the driving handle 30, the operation is simple, the stability is good, the difficulty is small, the depth of the blade 21 cutting into the sheath tube 1 in the radial direction is controllable, the electrode lead wire is not easy to be damaged, and the surgical risk can be greatly reduced.

[0051] In the embodiment, the holding member 13 has a pressing strip 131 located in the through hole 121 and a rotating strip 132 vertically connected to the end of the pressing strip 131, the rotating shaft of the holding member 13 is located at the vertical connection of the pressing strip 131 and the rotating strip 132, the rotating direction of the holding member 13 is perpendicular to the moving direction of the sheath seat 12, that is, the rotating shaft of the holding member 13 extends horizontally along the left-right direction, the pressing strip 131 extends along the axial direction of the through hole 121 and is arranged close to the inner wall of the through hole 121, the surface of the pressing strip 131 towards the axial line of the through hole 121 is a circular arc surface matched with the outer wall surface of the sheath 1, a plurality of convex ridge-shaped clamping teeth 133 extending in the circumferential direction are arranged on the circular arc surface, the end of the rotating strip 132 penetrates the sheath seat 12 along the radial direction of the through hole 121 and extends downward to be in transmission connection with the driving handle 30.

[0052] The advantage of the arrangement is that the pressing strip 131 can be circumferentially clamped with the sheath 1 by rotating the holding member 13, the sheath 1 is uniformly stressed and is not easily deformed locally, when the sheath seat 12 drives the sheath 1 to move backward, the electrode lead 2 in the sheath 1 will not follow the movement, the movement of the sheath 1 can be avoided to cause the displacement or falling of the pacing electrode, and the risk of the surgery is reduced.

[0053] In the embodiment, the driving handle 30 is located between the sheath seat 12 and the cutting assembly 20, and moves in the front-back direction which is parallel to the moving direction of the sheath seat 12, the driving handle 30 is in transmission connection with the holding member 13 through the first transmission plate 31, specifically, the first transmission plate 31 is located below the sheath seat 12 and extends in the front-back direction which is parallel to the moving direction of the driving handle 30, that is, the first transmission plate 31 extends in the front-back direction, the front end of the first transmission plate 31 is in transmission connection with the end of the rotating strip 132 extending out of the sheath seat 12, and the rear end of the first transmission plate 31 is in transmission connection with the upper end of the driving handle 30, the transmission shafts of the two ends of the first transmission plate 31 are parallel and arranged at the same height to avoid the dead point during transmission; for the convenience of resetting, the electrode lead delivery system further comprises a reset tension spring 32 for driving the driving handle 30 to reset, the reset tension spring 32 is arranged from the front upper side to the rear lower side, the front end of the reset tension spring 32 is connected to the inner wall of the housing 11, and the rear end of the reset tension spring 32 is connected to the transmission shaft of the rotating strip 132 and the first transmission plate 31.

[0054] In the embodiment, the sheath seat 12 is provided with an avoiding groove 122 for avoiding the pressing strip 131, the avoiding groove 122 extends from the root of the pressing strip 131 to the end thereof, the length of the avoiding groove 122 is shorter than that of the pressing strip 131, the end of the pressing strip 131 is provided with a notch 134 matched with the end of the avoiding groove 122, and the notch 134 is located on the opposite side of the clamping tooth 133.

[0055] The advantage of the arrangement is that, during the reset, the rotation angle of the clamping member 13 can be limited by the abutting of the gap 134 and the end of the avoiding groove 122, thereby improving the reset efficiency. Meanwhile, the abutting of the gap 134 and the end of the avoiding groove 122 is one-way abutting, which only limits the downward rotation of the clamping member 13 and does not hinder the upward rotation of the clamping member 13 and the disengagement of the gap 134.

[0056] In the embodiment, the electrode wire conveying system further comprises a safety assembly for preventing the driving handle 30 from being misoperated. The safety assembly comprises a safety plate 33 connected to the driving handle 30 and a safety pin 34 inserted into the shell 11. The safety plate 33 is arranged parallel below the first transmission plate 31 and extends to the side where the sheath seat 12 is located. The rear end of the safety plate 33 is connected to the driving handle 30, and the front end of the safety plate 33 is provided with a closed circular hole 331. The safety pin 34 is matched in size with the circular hole 331. When the safety pin 34 is inserted into the circular hole 331, the relative position of the driving handle 30 and the shell 11 is locked. When the safety pin 34 is separated from the circular hole 331, the driving handle 30 can move relative to the shell 11.

[0057] In order to facilitate the locking and unlocking of the safety assembly, in the embodiment, the end of the safety plate 33 is further provided with a flat hole 332 extending in the front-rear direction. The front end of the flat hole 332 penetrates the outer wall surface of the front end of the safety plate 33, and the rear end is communicated with the circular hole 331. The extension direction of the flat hole 332 is parallel to the moving direction of the driving handle 30. The midpoint of the width direction of the flat hole 332 constitutes a virtual plane passing through the axis of the circular hole 331. The safety pin 34 is rotatably inserted into the shell 11. The inner end of the safety pin 34 is flat, and its thickness is matched (equal or slightly smaller than the width of the flat hole 332) with the width of the flat hole 332. When the safety pin 34 is rotated to be aligned with the flat hole 332, the driving handle 30 can move backward relative to the shell 11, so that the inner end of the safety pin 34 enters the flat hole 332, thereby separating from the circular hole 331 and the safety plate 33. In order to facilitate operation, further, the outer end of the safety pin 34 is vertically connected with a driving plate 341. The driving plate 341 extends upward, and is located outside the shell 11. Rotating the driving plate 341 can drive the middle part of the safety pin 34 to rotate to the state of being aligned with the flat hole 332. The shell 11 is further provided with a limiting structure 111 for limiting the rotation angle of the driving plate 341, so that the rotation angle of the driving plate 341 is 0-90 degrees. The limiting structure 111 comprises a circular tube with a 90-degree notch and a protrusion provided on the safety pin 34. The safety pin 34 is inserted into the circular tube, and the protrusion is located in the notch.

[0058] In the embodiment, the cutting assembly 20 comprises a cutting seat 22 provided with the blade 21, the left and right side walls of the cutting seat 22 are provided with vertical sliding grooves 221, the inner part of the shell 11 is provided with a vertical protrusion 112, the vertical protrusion 112 is slidably embedded in the vertical sliding grooves 221, so that the cutting seat 22 is movably connected to the shell 11 in the up-down direction, the blade 21 is arranged at the upper end of the cutting seat 22, specifically, the upper end of the cutting seat 22 is provided with two side plates 222 extending in the front-back direction, a wire passage 223 for the electrode wire 2 to pass through is formed between the two side plates 222, and the blade 21 is connected to the end of the two side plates 222 facing the sheath seat 12 (the front end of the two side plates 222) and blocks the wire passage 223.

[0059] In the embodiment, the driving handle 30 is in transmission connection with the cutting seat 22 through the second transmission plate 35, specifically, the second transmission plate 35 extends in the front-back direction, the front end of the second transmission plate 35 is connected to the driving handle 30, the rear end of the second transmission plate 35 extends rearward to the direction close to the cutting seat 22, the extending direction of the second transmission plate 35 is parallel to the moving direction of the driving handle 30, the end of the second transmission plate 35 close to the cutting seat 22 is provided with a first inclined surface 351, the lower end of the cutting seat 22 is provided with a second inclined surface 224 matched with the first inclined surface 351, the second inclined surface 224 is in sliding fit with the first inclined surface 351, when the driving handle 30 moves in the direction of the cutting assembly 20 (moves rearward), the second inclined surface 224 can be driven to move by the first inclined surface 351, the cutting seat 22 is lifted upward, and the cutting assembly 20 is changed to the upper working position; in order to facilitate resetting, further, the end of the second transmission plate 35 close to the cutting seat 22 is further provided with a circular-arc protrusion 352, the circular-arc protrusion 352 is in transition connection with the upper end of the first inclined surface 351, after the driving handle 30 moves in the direction of the cutting assembly 20 to make the second inclined surface 224 deviate from the circular-arc protrusion 352, the second inclined surface 224 can be reset by moving along the circular-arc protrusion 352; in order to realize sliding guide, further, the inner wall of the shell 11 is further provided with a horizontal sliding groove 113, the left and right sides of the second transmission plate 35 are slidably embedded in the horizontal sliding groove 113, the width of the horizontal sliding groove 113 is matched with the thickness of the second transmission plate 35, and the length of the horizontal sliding groove 113 is greater than the length of the second transmission plate 35, so that even if the bottom end of the driving handle 30 is gripped to exert force, the second transmission plate 35 will not be stuck in the horizontal sliding groove 113.

[0060] In order to enable the cutting assembly 20 to be stably kept in the upper working position, in the present embodiment, the side wall of the cutting seat 22 is further provided with a limiting hole 225, the shell 11 is connected with a removable limiting pin 114, and a locking spring 115 is arranged to drive the limiting pin 114 to be inserted inwardly. When the cutting assembly 20 is moved upwardly to the upper working position, the limiting hole 225 is aligned with the limiting pin 114, the locking spring 115 drives the limiting pin 114 to be inserted inwardly, so that the end portion of the limiting pin 114 is inserted into the limiting hole 225, the relative position between the cutting seat 22 and the shell 11 is locked, and thus the cutting assembly 20 is stably kept in the upper working position.

[0061] In order to prevent the electrode lead wire 2 from moving relative to the sheath tube 1 when the cutting removal sheath tube 1 is removed, in the present embodiment, the cutting assembly 20 further comprises a wire pressing plate 23, which is movably arranged between the two side baffles 222. The lower end surface of the wire pressing plate 23 comprises a flat surface 231 close to the blade edge 21 and an inclined surface 232 away from the blade edge 21. The inclined surface 232 extends downwardly and inclines away from the blade edge 21. When the wire pressing plate 23 is moved toward the blade edge 21, the flat surface 231 straightens the electrode lead wire 2 in the lead wire channel 223, and the inclined surface 232 presses the electrode lead wire 2 in the lead wire channel 223, so as to prevent the electrode lead wire 2 from moving relative to the sheath tube 1. In order to facilitate the movement of the wire pressing plate 23, further, the cutting assembly 20 further comprises a driving rod 24 for driving the wire pressing plate 23 to move. The driving rod 24 extends along the front-rear direction, the front end portion of the driving rod 24 is movably inserted into a matching hole 226 on the cutting seat 22, and the rear end portion is connected with the end portion (rear end portion) of the wire pressing plate 23 away from the blade edge 21, so as to guide the electrode lead wire 2 passing through the lead wire channel 223 to be drawn out obliquely downwardly. Further, the lower portion of the matching hole 226 is provided with a matching groove 227 penetrating through the matching hole 226. The matching groove 227 is provided with a clamping compression spring 228. The end portion of the driving rod 24 has a downwardly extending resisting portion 241. The two end portions of the clamping compression spring 228 are respectively abutted against the resisting portion 241 and the rear side wall of the matching groove 227. The clamping compression spring 228 has a tendency to drive the driving rod 24 to move the wire pressing plate 23 toward the blade edge 21.

[0062] In the embodiment, the housing 11 has an obliquely extending holding section 11a and a mounting section 11b connected to the upper end of the holding section 11a, the sheath seat 12 is connected to the front end of the mounting section 11b, the cutting assembly 20 is connected to the rear end of the mounting section 11b and located above the holding section 11a, the driving handle 30 is connected to the side of the holding section 11a facing the sheath seat 12, when the driving handle 30 moves towards the holding section 11a (moves rearward), the cutting edge 21 can cut into the end of the sheath tube 1 to realize the cutting removal of the sheath tube 1; further, the rear end of the mounting section 11b is provided with a step, the horizontal surface 116 of the step is provided with a downward extending accommodation groove 117 for accommodating the cutting assembly 20, and the vertical surface 118 of the step is provided with a through hole 119 for the sheath tube 1 to pass out, the through hole 119 is coaxially arranged with the through hole 121, and the guide seat 3 for guiding the sheath tube 1 and the hemostatic valve 4 for hemostasis are inserted on the through hole 119.

[0063] In the embodiment, the sheath tube 1 is a bendable sheath tube, which comprises a first bending section 5 and a second bending section 6 connected in sequence, the first bending section 5 is a predetermined type bending section, the second bending section 6 is located at one end of the first bending section 5 facing the conveying carrier, the second bending section 6 is an adjustable bending section, the first bending section 5 and the second bending section 6 are at an angle of 90° with the plane, the radial direction of the sheath tube 1 is a multi-layer structure, and the axial direction is segmented to arrange materials with different hardness; in order to facilitate bending adjustment, further, the connection between the second bending section 6 and the first bending section 5 is provided with a pull line ring, the sheath tube 1 is provided with a bending pull line, one end of the bending pull line is connected with the pull line ring, and the other end is connected with a bending assembly 40 arranged on the mounting section 11b, specifically, the bending assembly 40 comprises a bending sleeve 41, a bending screw 42 and a bending knob 43, the bending sleeve 41 is composed of an inclined pipe section connected to the mounting section 11b, the bending screw 42 is arranged in the bending sleeve 41 and connected with the end of the bending pull line, and the bending knob 43 is inserted into the end of the bending sleeve 41 and threadedly connected with the bending screw 42, rotating the bending knob 43 can drive the bending screw 42 to move up and down along the bending sleeve 41, thereby pulling the bending pull line and changing the bending state of the second bending section 6.

[0064] In order to facilitate the electrode lead 2 to exit, in the embodiment, one side surface of the mounting section 11b is provided with a lead exit outer groove 11c with a width greater than or equal to 10mm, the lead exit outer groove 11c penetrates the mounting section 11b in the length direction (front-rear direction), and the sheath seat 12 is provided with a lead exit inner groove 123 corresponding to the lead exit outer groove 11c, the lead exit inner groove 123 penetrates the sheath seat 12 in the moving direction (front-rear direction) of the sheath seat 12.

[0065] The present application solves the problem of inconvenient operation of the doctor when cutting and removing the sheath, simplifies the step of cutting and removing the sheath, and can be stably completed by single hand, greatly reduces the operation difficulty of the doctor during operation, reduces the risk of displacement and falling of the electrode lead wire during implantation, and improves the safety of the operation; specifically, the sheath is withdrawn by driving the handle backward, and the blade is raised at the same time, and the sheath is cut and removed after the sheath continues to withdraw, only the driving handle needs to be pinched, and the operation is simple, convenient and stable.

[0066] In use, first rotate the driving plate 341 to make the middle part of the safety pin 34 rotate to be aligned with the flat hole 332 (horizontal state), and then pinch the driving handle 30 backward, drive the abutting strip plate 131 of the clamping piece 13 to rotate through the first transmission plate 31, clamp the sheath 1 with the through hole 121 of the sheath seat 12, at the same time, drive the cutting seat 22 of the cutting assembly 20 to move upward through the second transmission plate 35, make the blade 21 rise, and cut the rear end of the sheath 1 when the sheath 1 follows the sheath seat 12 to move backward synchronously; after pinching, release the driving handle 30, and the reset spring 32 drives the driving handle 30, the sheath seat 12 and the clamping piece 13 to reset, and the cutting seat 22 is kept in the current position through the combined action of the limiting hole 225, the limiting pin 114 and the locking spring 115; after resetting, repeat the backward pinching of the driving handle 30, and the sheath 1 can be withdrawn to realize cutting and removal; after cutting and removing the sheath 1, the electrode lead wire 2 is withdrawn from the outer groove 11c and the inner groove 123 to exit laterally.

[0067] It should be noted that before rotating the driving plate 341, the wire pressing plate 23 also needs to be pulled backward, and then the tail end of the electrode lead wire 2 is inserted into the wire passage 223 of the cutting seat 22 and led out downward, and then the wire pressing plate 23 is released, and the wire pressing plate 23 is driven to move forward by the clamping spring 228 to clamp the electrode lead wire 2 in the wire passage 223.

[0068] The above embodiments are only for illustrating the technical concept and characteristics of the present application, the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application, any equivalent changes or modifications made according to the spirit and essence of the present application should be covered in the protection scope of the present application.

Claims

1. An electrode wire delivery system that facilitates the cutting and removal of a sheath, characterized in that, include: It has a pistol-shaped outer shell and a transport carrier with a sheath seat movably disposed inside the outer shell. The sheath seat has a through hole for inserting the sheath. The direction of movement of the sheath seat is the axial direction of the through hole. The sheath seat has a rotatable clamping member. The clamping member has a rotating strip with its end extending radially through the through hole into the sheath seat. The clamping member has clamping and releasing working positions. When it is in the clamping working position, the clamping member presses the sheath radially against the inner wall of the through hole, so that the sheath seat can drive the sheath to move synchronously. When it is in the releasing working position, the clamping member disengages from the sheath, and the sheath seat can move relative to the sheath. A cutting assembly is movably disposed within the housing and located on one side of the sheath seat. It has a plow-shaped cutting edge facing the sheath seat and has upper and lower working positions. When it is in the upper working position, the cutting edge is higher than the lower edge of the through hole by at least one sheath wall thickness and lower than the electrode wire inside the sheath. When it is in the lower working position, the cutting edge is lower than the lower edge of the through hole. A drive handle is movably mounted on the outer casing and positioned below the sheath seat. The drive handle is connected to the clamping member and the cutting assembly via first and second transmission plates, respectively. The two ends of the first transmission plate are rotatably connected to the upper end of the drive handle and the end of the rotating bar, respectively. One end of the second transmission plate is connected to the drive handle, and the other end extends towards the cutting seat. The end of the second transmission plate near the cutting seat has a first inclined surface, and the lower end of the cutting seat has a second inclined surface that matches and slides against the first inclined surface. When the drive handle moves, it can drive the clamping member to change to the clamping working position and simultaneously drive the cutting assembly to change to the upper working position. It can also drive the sheath seat to move towards the cutting edge through the clamping member in the clamping working position, so that the cutting edge cuts into the end of the sheath to achieve the cutting and removal of the sheath.

2. The electrode wire conveying system according to claim 1, characterized in that: The clamping member also has a clamping strip located in the through hole, the clamping strip extending along the axial direction of the through hole and disposed close to the inner wall of the through hole, and the rotating strip being vertically connected to the end of the clamping strip.

3. The electrode wire conveying system according to claim 2, characterized in that: The surface of the clamping strip facing the axis of the through hole is an arc surface that matches the outer wall surface of the sheath, and the arc surface is provided with multiple circumferentially extending convex clamping teeth.

4. The electrode wire conveying system according to claim 3, characterized in that: The sheath seat has a clearance groove for avoiding the abutment plate. The clearance groove extends from the root of the abutment plate to its end. The length of the clearance groove is shorter than the length of the abutment plate. The abutment plate has a notch that matches the end of the clearance groove. The notch is located on the opposite side of the clamping teeth.

5. The electrode wire conveying system according to claim 2, characterized in that: The rotation direction of the clamping member is perpendicular to the movement direction of the sheath seat, and the movement direction of the drive handle is parallel to the movement direction of the sheath seat.

6. The electrode wire conveying system according to claim 5, characterized in that: The first transmission plate is located below the sheath seat, and its extension direction is parallel to the movement direction of the drive handle. The rotation axis lines of the two ends of the first transmission plate are parallel.

7. The electrode wire conveying system according to claim 6, characterized in that: The electrode wire delivery system also includes a reset spring for resetting the drive handle. One end of the reset spring is connected to the inner wall of the housing, and the other end is connected to the rotating bar and / or the first transmission plate.

8. The electrode wire conveying system according to claim 5, characterized in that: The electrode wire delivery system also includes a safety assembly to prevent the drive handle from malfunctioning. The safety assembly includes a safety plate connected to the drive handle and a safety pin inserted into the housing. The safety plate is arranged parallel to the bottom of the first transmission plate and extends towards the side where the sheath seat is located. The end of the safety plate has a closed circular hole. The size of the safety pin matches the circular hole. When the safety pin is inserted into the circular hole, the relative position of the drive handle and the housing is locked. When the safety pin is disengaged from the circular hole, the drive handle can move relative to the housing.

9. The electrode wire conveying system according to claim 8, characterized in that: The end of the safety plate is also provided with a flat hole. One end of the flat hole penetrates the outer wall surface of the end of the safety plate, and the other end communicates with the round hole. The extension direction of the flat hole is parallel to the movement direction of the drive handle. The virtual plane formed by the midpoint of the width direction of the flat hole passes through the axis of the round hole. The safety pin is rotatably inserted into the housing. The inner end of the safety pin is flat and its thickness matches the width of the flat hole. When it rotates to align with the flat hole, the drive handle can move relative to the housing.

10. The electrode wire conveying system according to claim 9, characterized in that: The end of the safety pin is connected to a drive plate, which is located on the outside of the housing. Rotating the drive plate can drive the middle part of the safety pin to rotate to align with the flat hole. The housing is also provided with a limiting structure that limits the rotation angle of the drive plate, so that the rotation angle of the drive plate is 0-90 degrees.

11. The electrode wire delivery system according to claim 1, characterized in that: The cutting assembly includes a cutting seat with a cutting edge, vertical grooves on both sides of the cutting seat, and a vertical protrusion inside the outer shell. The vertical protrusion is slidably embedded in the vertical groove, so that the cutting seat can be moved up and down and connected to the outer shell. The cutting edge is located at the upper end of the cutting seat.

12. The electrode wire delivery system according to claim 11, characterized in that: The extension direction of the second transmission plate is parallel to the movement direction of the drive handle. When the drive handle moves in the direction of the cutting assembly, it can drive the second inclined surface to move through the first inclined surface, lift the cutting seat upward, and change the cutting assembly to the upper working position.

13. The electrode wire delivery system according to claim 12, characterized in that: The second transmission plate is also provided with an arc-shaped protrusion at the end near the cutting seat. The arc-shaped protrusion is connected to the first inclined surface. After the drive handle moves in the direction of the cutting assembly to make the second inclined surface and the arc-shaped protrusion misalign, the second inclined surface can be reset by moving along the arc-shaped protrusion.

14. The electrode wire delivery system according to claim 11, characterized in that: The inner wall of the outer casing is also provided with a transverse sliding groove, and the two sides of the second transmission plate are slidably embedded in the transverse sliding groove.

15. The electrode wire delivery system according to claim 11, characterized in that: The side wall of the cutting seat is also provided with a limiting hole. The housing is connected to a pull-out limiting pin and a locking spring that drives the limiting pin to insert inward. When the cutting assembly moves upward to the upper working position, the limiting hole is aligned with the limiting pin, and the locking spring drives the limiting pin to insert inward, so that its end is inserted into the limiting hole, thereby locking the relative position of the cutting seat and the housing.

16. The electrode wire delivery system according to claim 11, characterized in that: The upper end of the cutting seat is provided with two side baffles, and a wire channel for the electrode wire to pass through is formed between the two side baffles. The cutting edge is connected to the ends of the two side baffles facing the sheath seat and blocks the wire channel.

17. The electrode wire delivery system according to claim 16, characterized in that: The cutting assembly further includes a wire pressing plate, which is movably disposed between the two side baffles. The lower end face of the wire pressing plate includes a flat surface near the cutting edge and an inclined surface away from the cutting edge. The inclined surface extends downward at an angle away from the cutting edge. When the wire pressing plate moves towards the cutting edge, the flat surface straightens the electrode wire with the wire channel, and the inclined surface presses the electrode wire tightly within the wire channel to prevent the electrode wire from moving relative to the sheath.

18. The electrode wire delivery system according to claim 17, characterized in that: The cutting assembly also includes a drive rod for moving the pressure plate. One end of the drive rod is movably inserted into a mating hole on the cutting seat, and the other end is misaligned with the end of the pressure plate away from the cutting edge.

19. The electrode wire delivery system according to claim 18, characterized in that: Below the mating hole is a mating groove that passes through it. A clamping spring is provided in the mating groove. The end of the drive rod has a downwardly extending abutment. The two ends of the clamping spring abut against the abutment and the side wall of the mating groove, respectively. The clamping spring has the tendency to drive the drive rod to move the pressure plate closer to the cutting edge.

20. The electrode wire conveying system according to claim 1, characterized in that: The housing has an inclined grip section and a mounting section connected to the upper end of the grip section. The sheath seat is connected to the front end of the mounting section. The cutting assembly is connected to the rear end of the mounting section and located above the grip section. The drive handle is connected to the side of the grip section facing the sheath seat. When the drive handle moves toward the grip section, the cutting edge can cut into the end of the sheath to cut and remove the sheath.

21. The electrode wire conveying system according to claim 20, characterized in that: The rear end of the installation section is provided with a step, and the horizontal surface of the step is provided with a downwardly extending receiving groove for accommodating the cutting component. The vertical surface of the step is provided with a through hole for the sheath to pass through. The through hole is coaxially arranged with the through hole. A guide seat for guiding the sheath and a hemostatic valve for hemostasis are inserted into the through hole.

22. The electrode wire conveying system according to claim 20, characterized in that: The sheath is a flexible sheath, which includes a first curved section and a second curved section connected in sequence. The first curved section is a pre-shaped curved section, and the second curved section is located at the end of the first curved section facing the conveying carrier. The second curved section is an adjustable curved section.

23. The electrode wire delivery system according to claim 22, characterized in that: A pull wire ring is provided at the connection between the second bending section and the first bending section. An adjustment pull wire is provided inside the sheath. One end of the adjustment pull wire is connected to the pull wire ring, and the other end is connected to the adjustment assembly provided on the installation section.

24. The electrode wire conveying system according to claim 23, characterized in that: The bending assembly includes a bending sleeve, a bending screw, and a bending knob. The bending sleeve is composed of an inclined pipe section connected to the mounting section. The bending screw is located inside the bending sleeve and connected to the end of the bending cable. The bending knob is inserted into the end of the bending sleeve and threadedly connected to the bending screw. Rotating the bending knob can drive the bending screw to move up and down, thereby pulling the bending cable and changing the bending state of the second bending section.

25. The electrode wire conveying system according to claim 20, characterized in that: One side of the mounting section is provided with a wire exit outer groove, which extends through the mounting section in the length direction. The sheath seat is provided with a wire exit inner groove corresponding to the wire exit outer groove, which extends through the sheath seat in the direction of movement of the sheath seat.

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