Conveying system

Abstract

The invention relates to a conveying system which comprises a catheter assembly, a first handle and a second handle, the catheter assembly comprises a balloon catheter and a bending control catheter arranged outside the balloon catheter in a sleeving mode, the first handle comprises a first shell and a bending control module arranged on the first shell, and the first shell is fixedly connected with the near end of the bending control catheter; the second handle comprises a second shell, a twisting control module and a locking module, the twisting control module and the locking module are arranged on the second shell, the near end of the balloon catheter is rotatably arranged on the second shell through the twisting control module, the locking module is arranged at the position, connected with the first shell in a sleeving mode, of the second shell and has a locking state and a releasing state, and when the locking module is in the locking state, the balloon catheter is locked. The second shell is limited in the first shell in the axial direction, and when the locking module is in the release state, the second shell and the first shell can move relatively in the axial direction. According to the conveying system, bending control, torsion control, fine adjustment and rapid withdrawing can be easily and conveniently carried out, and the operation convenience of the conveying system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a delivery system. Background Art

[0002] With the continuous advancement of medical technology, aortic valve surgery is becoming increasingly common in the treatment of heart diseases such as aortic stenosis. This surgery requires highly sophisticated equipment and tools, of which the delivery system, as a key component, plays a vital role in the successful implementation of the surgery.

[0003] In the related art, the control handle has the problem of inconvenient operation, for example, it is impossible to conveniently perform operations such as system entry, arch crossing, bending control, twisting control, and release. Summary of the Invention

[0004] Based on this, a conveying system is provided, which can easily perform bending control, twist control, fine adjustment and rapid retraction to solve the problem of inconvenient operation.

[0005] The present application provides a delivery system, comprising:

[0006] The catheter assembly comprises a balloon catheter and a bend control catheter sheathed outside the balloon catheter;

[0007] A first handle includes a first shell and a bending control module provided in the first shell, wherein the first shell is fixedly connected to the proximal end of the bending control catheter, and the bending control module is used to drive the distal end of the bending control catheter to bend;

[0008] The second handle includes a second shell and a torque control module and a locking module arranged on the second shell. The proximal end of the balloon catheter is rotatably arranged on the second shell through the torque control module. The torque control module is used to drive the balloon catheter to twist around the central axis of the bending control catheter. The distal end of the second shell is sleeved on the proximal end of the first shell. The locking module is arranged at a position where the second shell is sleeved with the first shell, and has a locking state for locking the relative positions of the two and a releasing state for releasing the relative positions of the two. When the locking module is in the locking state, the second shell is axially limited to the first shell. When the locking module is in the releasing state, the second shell and the first shell can move relative to each other in the axial direction.

[0009] In one embodiment, the first shell includes a main shell and a supporting shell, the supporting shell is fixed to the proximal end of the main shell, the second shell is sleeved on the supporting shell, the outer wall of the supporting shell is provided with a plurality of meshing teeth arranged along the axial direction, the locking module includes a locking ring, an elastic member and a button, the locking ring is sleeved outside the supporting shell and has a latching tooth opposite to the meshing tooth, the elastic member is arranged between the locking ring and the second shell, the elastic member is used to drive the latching tooth to cooperate with at least one of the meshing teeth, the button is connected to the locking ring, and the button has a pressing part. When the button is pressed by the pressing part, the locking ring overcomes the elastic force of the elastic member and moves radially relative to the supporting shell, and separates the latching tooth from the meshing tooth.

[0010] In one embodiment, the outer diameter of the supporting shell is smaller than the outer diameter of the main shell; and / or the outer diameter of the second shell is equal to the outer diameter of the main shell.

[0011] In one embodiment, the locking ring is limited to the second shell in the axial direction and the circumferential direction of the second shell.

[0012] In one embodiment, a mounting groove is provided in the second shell, and a through hole is provided on a side of the second shell opposite to the mounting groove. The elastic member includes a spring provided in the mounting groove, and the spring is abutted against a side of the locking ring facing away from the button. One end of the button is connected to the locking ring, and the other end can be movably passed through the through hole to exit the second shell.

[0013] In one embodiment, the bending control module includes a knob, a screw, an inner rod and a traction member. The knob is rotatably connected to the first shell and is used to drive the screw to rotate axially around the inner rod in the first shell. The inner rod is inserted into the screw and fixed to the first shell. The traction member is arranged between the inner rod and the screw. The traction member is threadedly engaged with the screw. When the knob drives the screw to rotate, the screw drives the traction member to move along the inner rod. The traction member is used to pull the distal end of the bending control catheter through the bending wire.

[0014] In one embodiment, the traction member includes a threaded block and a fixing ring connected to each other, the threaded block is threadedly engaged with the screw rod, and the fixing ring is sleeved on the inner rod and connected to the bending control wire;

[0015] And / or, one of the pulling member and the inner rod is provided with a protrusion, and the other one is provided with a sliding groove, and the protrusion cooperates with the sliding groove so that the pulling member is limited to the inner rod around the axial direction of the inner rod.

[0016] In one embodiment, the first shell is provided with a scale window, and an indicator corresponding to the scale window is provided in the first shell. The indicator is engaged with the outer wall thread of the screw. When the screw rotates in the first shell, the indicator moves axially driven by the screw.

[0017] In one embodiment, the indicator includes a ring and a boss connected to the outer circumference of the ring, and the first shell is provided with a slide groove parallel to the screw corresponding to the position of the scale window. The ring is threadedly engaged with the outer wall of the screw, and the boss is slidably engaged with the slide groove and has an indicator mark for being opposite to the scale of the scale window.

[0018] In one embodiment, the torque control module includes a transmission rod and a torque control knob. The transmission rod is fixed to the balloon catheter. The transmission rod is axially limited in the second shell and can be rotated axially in the second shell under the drive of the torque control knob to drive the balloon catheter to twist around the central axis of the bending control catheter. When the torque applied to the transmission rod by the torque control knob is released, the balloon catheter drives the torque control knob to rotate relative to the second shell via the transmission rod.

[0019] In one embodiment, the twist control knob is rotatably connected to the proximal end of the second shell, the surface of the transmission rod is provided with a latching protrusion, the inner wall of the twist control knob is provided with a latching groove arranged axially therethrough, and the twist control knob is sleeved on the transmission rod so that the latching protrusion cooperates with the latching groove.

[0020] The above-mentioned delivery system utilizes a bending control module and a twist control module to realize the bending of the bending control catheter and the twisting of the balloon catheter respectively, so as to facilitate the delivery system to pass smoothly through positions such as the aortic arch. Since the locking module can lock or release the relative position of the first shell and the second shell, when the locking module locks the relative position of the first shell and the second shell, the second shell is axially limited to the first shell. At this time, the system can be entered, passed through the arch, controlled, twisted, released, etc. When the locking module releases the relative position of the first shell and the second shell, the second shell and the first shell can be moved relative to each other in the axial direction. At this time, the second shell is fixed and the first handle is moved proximally relative to the second shell to realize the rapid withdrawal of the bending control catheter. When the locking module releases the second shell, the first shell can also be fixed and the second handle can be moved axially relative to the first shell to realize the axial fine adjustment of the balloon catheter. Therefore, the delivery system of the present application can be easily controlled, twisted, fine-tuned and quickly withdrawn, thereby improving the convenience of operation of the delivery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, without paying any creative work, they can also obtain drawings of other embodiments based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of a conveying system according to one embodiment.

[0023] Figure 2 It is a schematic cross-sectional structural diagram of a conveying system according to one embodiment.

[0024] Figure 3 It is a schematic diagram of the partial structural decomposition of a conveying system according to one embodiment.

[0025] Figure 4 for Figure 3 Schematic diagram of the local enlarged structure at circle A in FIG.

[0026] Figure 5 Schematic diagram of the internal structure of a conveying system according to one embodiment.

[0027] Figure 6 for Figure 5 Schematic diagram of the local enlarged structure at circle B in FIG.

[0028] Figure 7 for Figure 5 Schematic diagram of the local enlarged structure at circle C in FIG.

[0029] Figure 8 Schematic diagram of the connection between the catheter assembly and the balloon of a delivery system according to one embodiment.

[0030] Reference numerals:

[0031] 100, delivery system; 10, catheter assembly; 11, balloon catheter; 12, bend control catheter; 20, first handle; 20a, scale window; 21, first housing; 21a, main housing; 21b, support housing; 21c, meshing teeth; 22, bend control module; 221, knob; 222, screw; 223, inner rod; 224, traction member; 224a, threaded block; 224b, fixing ring; 23, indicator; 231, collar; 232, boss; 30, second handle; 31, second housing Body; 31a, upper shell; 31b, lower shell; 311, limit baffle; 312, mounting groove; 313, through-hole; 314, groove; 32, twist control module; 321, transmission rod; 321a, latch; 321b, outer boss; 322, twist control knob; 322a, latch slot; 33, locking module; 331, locking ring; 331a, latch tooth; 332, elastic member; 332a, spring; 333, button; 333a, pressing portion; 101, TIP head; 102, balloon. DETAILED DESCRIPTION

[0032] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0034] The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions are for illustrative purposes only and do not represent the only implementations.

[0035] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present application.

[0036] It should be noted that the terms "distal" and "proximal" are commonly used in the field of interventional medical devices. "Distal" refers to the end away from the operator (e.g., physician) during surgery, while "proximal" refers to the end closer to the operator. Axial refers to the direction along which the central axis of the medical device extends, while radial refers to the direction perpendicular to the axial direction.

[0037] See Figure 1 and Figure 2 As shown, an embodiment of the present application provides a delivery system 100, comprising a catheter assembly 10, a first handle 20, and a second handle 30. The catheter assembly 10 comprises a balloon catheter 11 and a bend control catheter 12 sleeved outside the balloon catheter 11. The first handle 20 comprises a first shell 21 and a bend control module 22 disposed on the first shell 21. The first shell 21 is fixedly connected to the proximal end of the bend control catheter 12. The bend control module 22 is used to drive the distal end of the bend control catheter 12 to bend. The second handle 30 comprises a second shell 31 and a torque control module 32 and a locking module 33 disposed on the second shell 31. The proximal end of the balloon catheter 11 is rotatably disposed on the second shell 31 via the torque control module 32. The torque control module 32 is used to drive the balloon catheter 11 to twist around the central axis of the bend control catheter 12. The distal end of the second shell 31 is sleeved on the proximal end of the first shell 21. The locking module 33 is disposed at a position of the second shell 31 where it is sleeved with the first shell 21. In this embodiment, the locking module 33 has a locked state, which locks the relative position of the first housing 21 and the second housing 31, and a released state, which releases the first housing 21 and the second housing 31. When the locking module 33 is in the locked state, the second housing 31 is axially constrained to the first housing 21; when the locking module 33 is in the released state, the second housing 31 and the first housing 21 can move relative to each other in the axial direction.

[0038] The bend control module 22 and the twist control module 32 are used to achieve bending of the bend control catheter 12 and twisting of the balloon catheter 11, respectively, to facilitate smooth passage of the delivery system 100 through locations such as the aortic arch. When the locking module 33 is in the locked state, the second housing 31 is axially restricted to the first housing 21. At this time, system entry, arch crossing, bend control, twist control, and release operations can be performed. When the locking module 33 is in the released state, the second housing 31 and the first housing 21 can move relative to each other in the axial direction. At this time, the second housing 31 can be fixed and the first handle 20 can be moved proximally relative to the second housing 31 to achieve rapid retraction of the bend control catheter 12. When the locking module 33 is in the released state, the first housing 21 can also be fixed and the second handle 30 can be moved axially relative to the first housing 21 to achieve axial fine-tuning of the balloon catheter 11. Therefore, the delivery system 100 of the present application can easily perform bend control, twist control, fine-tuning, and rapid retraction, improving the ease of operation of the delivery system 100.

[0039] Combine Figure 2 As shown, in some embodiments, the first housing 21 includes a main housing 21a and a supporting housing 21b. The main housing 21a and the supporting housing 21b can be integrally formed or connected by snap fastening or gluing.

[0040] The support shell 21b is fixed to the proximal end of the main shell 21a. The second shell 31 is sleeved on the support shell 21b, and the outer wall of the support shell 21b is provided with a plurality of meshing teeth 21c arranged along the axial direction. The locking module 33 includes a locking ring 331, an elastic member 332 and a button 333. The locking ring 331 is sleeved outside the support shell 21b and has a latching tooth 331a opposite to the meshing tooth 21c. The elastic member 332 is provided between the locking ring 331 and the second shell 31, and the elastic member 332 is used to drive the latching tooth 331a to cooperate with at least one meshing tooth 21c. The button 333 is connected to the locking ring 331, and the button 333 has a pressing portion 333a. When the button 333 is pressed via the pressing portion 333a, the locking ring 331 overcomes the elastic force of the elastic member 332 and moves radially relative to the support shell 21b, causing the latching tooth 331a to separate from the meshing tooth 21c. In this way, the locking module 33 can be released by pressing the button 333. After releasing the pressing force on the button 333, the elastic member 332 can drive the locking ring 331 to reset, so that the locking teeth 331a of the locking ring 331 re-engage with the meshing teeth 21c to re-lock the relative positions of the first shell 21 and the second shell 31, so that the second shell 31 cannot continue to move relative to the first shell 21, and then the first handle 20 and the second handle 30 can be used as a whole to adapt to the needs of the delivery system 100 for entry, arch crossing, bend control, twist control, release, etc. It should be noted that since the second shell 31 and the first shell 21 can move relative to each other in the axial direction when the locking module 33 is in the released state, the locking teeth 331a can be matched with the meshing teeth 21c in different positions to adapt to the locking of the second shell 31 in multiple positions.

[0041] For ease of understanding, the retraction and fine-tuning operations of the conveying system 100 are described below in conjunction with the structure of the locking module 33 of this embodiment.

[0042] Combine Figure 2 As shown, when the button 333 is not pressed, the elastic member 332 pushes up the locking ring 331, causing the locking teeth 331a of the locking ring 331 to engage with the meshing teeth 21c of the second housing 31, thereby locking the axial relative movement between the first housing 21 and the second housing 31. At this point, the first handle 20 and the second handle 30 form a single unit, allowing for operations such as approach, arch crossing, bend control, twist control, and release.

[0043] When the button 333 is pressed, the locking ring 331 moves radially relative to the support shell 21b, so that the locking tooth 331a of the locking ring 331 disengages from the meshing tooth 21c, thereby losing the meshing limit between the locking tooth 331a and the meshing tooth 21c between the second shell 31 and the support shell 21b, and the second shell 31 can move axially relative to the support shell 21b.

[0044] The relative movement between the second shell 31 and the first shell 21 in the axial direction includes, but is not limited to, one of them remaining fixed while the other moves in the axial direction. For example, in some embodiments, after pressing the button 333 to disengage the latching teeth 331a from the meshing teeth 21c, if the second shell 31 is fixed and the first shell 21 is moved proximally, the first shell 21 can drive the bend control catheter 12 to move proximally, thereby achieving rapid retraction of the bend control catheter 12. Correspondingly, if the first shell 21 is fixed after pressing the button 333 to disengage the latching teeth 331a from the meshing teeth 21c, moving the second shell 31 can cause the second shell 31 to drive the balloon catheter 11 to move in the axial direction of the bend control catheter 12, thereby achieving axial fine-tuning of the balloon catheter 11. It can be seen that the delivery system 100 of the present application is simple and reliable to operate. By simply pressing the button 333 of the locking module 33, the first handle 20 or the second handle 30 can be moved to achieve functions such as rapid retraction of the bending control catheter 12 or axial fine-tuning of the balloon catheter 11.

[0045] Combine Figure 2 As shown, the outer diameter of the support shell 21b is smaller than the outer diameter of the main shell 21a, so that after the second shell 31 is mounted on the support shell 21b, the overall outer diameter can be as small as possible, which is conducive to the miniaturization of the second handle 30, meets the ergonomic size and shape, and is easy to hold.

[0046] In some embodiments, the outer diameter of the second housing 31 is equal to the outer diameter of the main housing 21 a , thereby improving the grip feel of the first handle 20 and the second handle 30 of the delivery system 100 .

[0047] It should be noted that the first shell 21 and the second shell 31 serve as the carriers for the gripping portion and other structural components of the conveying system 100. The first shell 21 and the second shell 31 can be composed of two or more shells to facilitate the assembly of other structural components into the corresponding shells. Figure 3 and Figure 4 As shown, the second housing 31 includes an upper housing 31 a and a lower housing 31 b , which are connected by screws or snaps to form an assembly space for the torque control module 32 and the locking module 33 .

[0048] In some embodiments, the locking ring 331 is limited to the second housing 31 in the axial and circumferential directions of the second housing 31. A limiting baffle 311 may be provided on the inner wall of the second housing 31 to axially limit the locking ring 331, preventing the locking ring 331 from moving axially relative to the second housing 31. Thus, when the latching teeth 331a of the locking ring 331 disengage from the meshing teeth 21c of the support shell 21b, the second housing 31 and the support shell 21b are moved axially relative to each other, and the locking ring 331 moves axially along with the second housing 31 relative to the support shell 21b. Thus, the latching teeth 331a of the locking ring 331 correspond to different meshing teeth 21c of the support shell 21b, so that the engagement of the latching teeth 331a with the meshing teeth 21c at different positions satisfies the need for locking the second housing 31 when it is moved axially to different positions relative to the first housing 21.

[0049] The number of latching teeth 331a and meshing teeth 21c is not limited herein. For example, in some embodiments, the number of meshing teeth 21c is 5 to 10 times the number of latching teeth 331a. The number of latching teeth 331a and meshing teeth 21c, as well as the spacing between the meshing teeth 21c, can be set based on the appropriate axial motion range of the first housing 21 and the second housing 31 relative to each other, as long as it can ensure that the conveying system 100 can be locked by the locking module 33 within the corresponding range during normal use.

[0050] Combine Figures 2 to 4 As shown, in some embodiments, a mounting groove 312 is provided in the second housing 31, and a perforation 313 is provided on a side of the second housing 31 opposite the mounting groove 312. The elastic member 332 includes a spring 332a disposed in the mounting groove 312. The spring 332a abuts against a side of the locking ring 331 facing away from the button 333. One end of the button 333 is connected to the locking ring 331, and the other end can be movably extended out of the second housing 31 through the perforation 313. With this structural arrangement, the spring 332a can stably press the locking ring 331, causing the locking teeth 331a of the locking ring 331 to engage with the meshing teeth 21c on the outer wall of the support shell 21b. To release the relative position between the first housing 21 and the second housing 31, simply press the button 333 to overcome the elastic force of the spring 332a, thereby driving the locking ring 331 to move radially relative to the support shell 21b, causing the locking teeth 331a to disengage from the meshing teeth 21c.

[0051] Combine Figure 2 、 Figure 5 and Figure 6As shown, in some embodiments, the bending control module 22 includes a knob 221, a screw 222, an inner rod 223, and a pulling member 224. The knob 221 is rotatably connected to the first housing 21 and is used to drive the screw 222 to rotate axially around the inner rod 223 within the first housing 21. The inner rod 223 is disposed within the screw 222 and is fixed to the first housing 21. The pulling member 224 is disposed between the inner rod 223 and the screw 222 and is threadedly engaged with the screw 222. In this embodiment, when the knob 221 drives the screw 222 to rotate, the screw 222 drives the pulling member 224 to move along the inner rod 223. The pulling member 224 is used to pull the distal end of the bending control catheter 12 via the bending control wire, thereby adjusting the degree of bending of the bending control catheter 12.

[0052] The traction member 224 comprises a threaded block 224a and a fixed ring 224b. The threaded block 224a is threadedly engaged with the screw rod 222, so that the rotation of the screw rod 222 drives the threaded block 224a to move. The fixed ring 224b is sleeved onto the inner rod 223 and connected to the bend control wire. Driven by the threaded block 224a, the fixed ring 224b can pull the distal end of the bend control catheter 12 via the bend control wire, thereby adjusting the degree of curvature of the bend control catheter 12.

[0053] It should be noted that, since the screw 222 can drive the traction member 224 to move along the inner rod 223 when it rotates, the traction member 224 can be circumferentially limited to the inner rod 223 to prevent the traction member 224 from rotating along with the screw 222. In other words, the traction member 224 is axially limited to the inner rod 223. For example, in some embodiments, one of the traction member 224 and the inner rod 223 is provided with a protrusion, and the other is provided with a slot, and the protrusion cooperates with the slot, so that the traction member 224 is axially limited to the inner rod 223.

[0054] Combine Figure 6 As shown, in some embodiments, the first housing 21 is provided with a graduated window 20a. An indicator 23 corresponding to the graduated window 20a is disposed within the first housing 21. The indicator 23 engages with a threaded outer wall of the screw 222. When the screw 222 rotates within the first housing 21, the indicator 23 moves axially driven by the screw 222. Since the screw 222 drives the traction member 224 axially when rotating within the first housing 21, causing the traction member 224 to pull the distal end of the bending control catheter 12, the position of the indicator 23 along the axial movement of the screw 222 can be used to represent the displacement change of the traction member 224 under the drive of the screw 222, thereby indicating the current bending amount of the bending control catheter 12. This allows the bending operation of the bending control catheter 12 to be quantified, thereby improving the accuracy of the bending operation.

[0055] Combine Figure 6 As shown, in some embodiments, the indicator 23 includes a collar 231 and a boss 232 connected to the outer periphery of the collar 231. A slot parallel to the screw 222 is provided at the position of the first housing 21 corresponding to the scale window 20a. The collar 231 is threadedly engaged with the outer wall of the screw 222, and the boss 232 is slidably engaged with the slot. In this embodiment, the boss 232 has an indicator mark corresponding to the scale of the scale window 20a. As the screw 222 rotates, the screw 222 drives the collar 231 to move axially, so that the indicator mark on the boss 232 moves along the axial direction of the screw 222 to correspond to the corresponding scale on the scale window 20a. At this time, the current bending amount of the bend control catheter 12 can be read or the degree of bending of the bend control catheter 12 can be understood by referring to the scale corresponding to the indicator mark.

[0056] Combine Figure 8 As shown, balloon 102 is located at the distal end of balloon catheter 11, and the prosthesis is pressed against the outer surface of balloon 102. Both balloon 102 and the prosthesis are equipped with imaging structures, allowing visualization of the relative position of the prosthesis and anatomical structures. Balloon catheter 11 can rotate balloon 102, causing the prosthesis on the outer surface of balloon 102 to rotate with it, thereby aligning the prosthesis with the native aortic valve and preventing coronary artery obstruction. The distal end of balloon 102 can be connected to a tip 101, which can be used to reduce damage to internal tissues during delivery system 100 entry.

[0057] When the balloon catheter 11 is twisted, it will encounter resistance from the anatomical structure. The distal end will only twist when the torque value transmitted from the proximal end to the distal end is sufficient to overcome the resistance. In addition, since the balloon catheter 11 is not a completely rigid body, the balloon catheter 11 itself will be twisted to a certain extent during the torque transmission process and store some elastic energy. If the proximal end of the balloon catheter 11 is locked after the balloon catheter 11 is twisted, the elastic energy will be stored in the balloon catheter 11. When other operations such as prosthesis release are performed, this part of energy may be released from the distal end, causing the positioned prosthesis to shift. In order to avoid this situation, in the embodiment of the present application, the twist control knob 322 is designed to be a non-damping structure, that is, after the twisting operation is completed, the twist control knob 322 is released, and the twist control knob 322 will rotate to a certain extent, and the elastic energy in the balloon catheter 11 will be released from the end of the twist control knob 322. Specifically, in combination Figure 2 、 Figure 5 and Figure 7As shown, the torque control module 32 includes a transmission rod 321 and a torque control knob 322. The transmission rod 321 is fixed to the balloon catheter 11 and axially constrained within the second housing 31. Driven by the torque control knob 322, the transmission rod 321 can rotate axially within the second housing 31 to drive the balloon catheter 11 to twist about the central axis of the bend control catheter 12. When the torque applied by the torque control knob 322 to the transmission rod 321 is released, the balloon catheter 11, via the transmission rod 321, drives the torque control knob 322 to rotate relative to the second housing 31.

[0058] The control knob 322 is rotatably connected to the proximal end of the second housing 31. A latching protrusion 321a is provided on the surface of the transmission rod 321, and a latching slot 322a is provided on the inner wall of the control knob 322, extending axially therethrough. The control knob 322 is sleeved onto the transmission rod 321, with the latching protrusion 321a mating with the latching slot 322a. With this structural design, when assembling the control knob 322, the control knob 322 can be sleeved from the proximal end of the transmission rod 321 and moved toward the distal end, finally mating the latching protrusion 321a with the latching slot 322a. At this point, the control knob 322 can be used to operate the transmission rod 321 to rotate axially relative to the second housing 31.

[0059] The transmission rod 321 includes an external boss 321b that rotatably engages with the second housing 31. Specifically, the second housing 31 is provided with a groove 314 axially disposed around the balloon catheter 11. The outer wall of the transmission rod 321 is formed with an external boss 321b that engages with the groove 314. When the transmission rod 321 rotates, the groove 314 provides a clearance for the external boss 321b. In this embodiment, the engagement of the external boss 321b with the groove 314 allows the transmission rod 321 to be axially constrained within the second housing 31. Thus, when the second housing 31 moves relative to the first housing 21, the second housing 31 drives the balloon catheter 11, via the transmission rod 321, to move axially relative to the bend control catheter 12 of the first housing 21.

[0060] It should be noted that, in the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0061] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0062] In the present application, unless otherwise clearly specified and limited, a first feature being “on” or “under” a second feature may mean that the first and second features are in direct contact with each other, or the first and second features are in indirect contact with each other through an intermediate medium.

[0063] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above embodiments merely illustrate several implementation methods of the present application, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the inventive concept of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A conveying system, characterized in that: include: The catheter assembly comprises a balloon catheter and a bend control catheter sheathed outside the balloon catheter; A first handle includes a first shell and a bending control module provided in the first shell, wherein the first shell is fixedly connected to the proximal end of the bending control catheter, and the bending control module is used to drive the distal end of the bending control catheter to bend; The second handle includes a second shell and a torque control module and a locking module arranged on the second shell. The proximal end of the balloon catheter is rotatably arranged on the second shell through the torque control module. The torque control module is used to drive the balloon catheter to twist around the central axis of the bending control catheter. The distal end of the second shell is sleeved on the proximal end of the first shell. The locking module is arranged at a position where the second shell is sleeved with the first shell, and has a locking state for locking the relative positions of the two and a releasing state for releasing the relative positions of the two. When the locking module is in the locking state, the second shell is axially limited to the first shell. When the locking module is in the releasing state, the second shell and the first shell can move relative to each other in the axial direction.

2. The conveying system according to claim 1, characterized in that The first shell includes a main shell and a supporting shell, the supporting shell is fixed to the proximal end of the main shell, the second shell is sleeved on the supporting shell, the outer wall of the supporting shell is provided with a plurality of meshing teeth arranged along the axial direction, the locking module includes a locking ring, an elastic member and a button, the locking ring is sleeved outside the supporting shell, and has a latching tooth opposite to the meshing tooth, the elastic member is arranged between the locking ring and the second shell, the elastic member is used to drive the latching tooth to cooperate with at least one of the meshing teeth, the button is connected to the locking ring, and the button has a pressing part. When the button is pressed by the pressing part, the locking ring overcomes the elastic force of the elastic member and moves radially relative to the supporting shell, and separates the latching tooth from the meshing tooth.

3. The conveying system according to claim 2, characterized in that The outer diameter of the supporting shell is smaller than the outer diameter of the main shell; and / or the outer diameter of the second shell is equal to the outer diameter of the main shell.

4. The conveying system according to claim 2, characterized in that The locking ring is located in the second shell in the axial direction and the circumferential direction of the second shell.

5. The conveying system according to claim 2, characterized in that A mounting groove is provided in the second shell, and a through hole is provided on a side of the second shell opposite to the mounting groove. The elastic member includes a spring provided in the mounting groove, and the spring is abutted against the side of the locking ring facing away from the button. One end of the button is connected to the locking ring, and the other end can be movably passed through the through hole to exit the second shell.

6. The conveying system according to claim 1, characterized in that The bending control module includes a knob, a screw, an inner rod and a traction member. The knob is rotatably connected to the first shell and is used to drive the screw to rotate around the axial direction of the inner rod in the first shell. The inner rod is inserted into the screw and fixed to the first shell. The traction member is arranged between the inner rod and the screw. The traction member is threadedly engaged with the screw. When the knob drives the screw to rotate, the screw drives the traction member to move along the inner rod. The traction member is used to pull the distal end of the bending control catheter through the bending wire.

7. The conveying system according to claim 6, characterized in that The traction member includes a threaded block and a fixing ring connected to each other, the threaded block is threadedly matched with the screw rod, and the fixing ring is sleeved on the inner rod and connected to the bending control wire; And / or, one of the pulling member and the inner rod is provided with a protrusion, and the other one is provided with a sliding groove, and the protrusion cooperates with the sliding groove so that the pulling member is limited to the inner rod around the axial direction of the inner rod.

8. The conveying system according to claim 6, characterized in that The first shell is provided with a scale window, and an indicator corresponding to the scale window is provided in the first shell. The indicator is engaged with the outer wall thread of the screw. When the screw rotates in the first shell, the indicator moves axially driven by the screw.

9. The conveying system according to claim 8, characterized in that The indicator includes a ring and a boss connected to the outer circumference of the ring. The first shell is provided with a sliding groove parallel to the screw corresponding to the position of the scale window. The ring is threadedly engaged with the outer wall of the screw. The boss is slidably engaged with the sliding groove and has an indicator mark for being opposite to the scale of the scale window.

10. The conveying system according to claim 1, characterized in that The torque control module includes a transmission rod and a torque control knob. The transmission rod is fixed to the balloon catheter. The transmission rod is axially limited in the second shell and can rotate axially in the second shell under the drive of the torque control knob to drive the balloon catheter to twist around the central axis of the bending control catheter. When the torque applied to the transmission rod by the torque control knob is released, the balloon catheter drives the torque control knob to rotate relative to the second shell via the transmission rod.

11. The conveying system according to claim 10, characterized in that The twist control knob is rotatably connected to the proximal end of the second shell, the surface of the transmission rod is provided with a locking protrusion, the inner wall of the twist control knob is provided with a locking groove arranged axially, and the twist control knob is sleeved on the transmission rod so that the locking protrusion cooperates with the locking groove.

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