CN217660063U - Control mechanism of adjustable bending delivery system - Google Patents

Abstract

The utility model discloses a mechanism of controlling of delivery system can bend, include: a steering handle comprising a base portion and a body portion, the base portion connected to a proximal end of the body portion, the base portion comprising a base housing and a delivery assembly mounted to the base housing; the proximal end of the control catheter is fixed on the control handle, and the control mechanism is also provided with a control channel which penetrates through the control handle and the control catheter; the delivery rod is arranged in the control channel, the proximal end of the delivery rod is connected with the delivery assembly, and the distal end of the delivery rod extends out of the control catheter; the delivery assembly comprises a delivery gear and a delivery knob, the delivery gear and the delivery knob are respectively arranged on the inner side and the outer side of the base shell, the proximal end of the delivery rod is positioned in the base shell, a plurality of meshing teeth are arranged at a preset position of the proximal end of the delivery rod, and the delivery gear is meshed with the meshing teeth. The control mechanism of the adjustable bending delivery system controls the delivery rod to move back and forth along the axial direction through the mutual meshing structure between the gears, and can control the delivery rod to stably move.

Description

Control mechanism of adjustable bending delivery system

Technical Field

The utility model relates to a medical field further relates to the mechanism of controlling of delivery system that can bend.

Background

The human body valve mainly comprises an arterial valve, a venous valve and an atrioventricular valve, and the valve mainly plays an important role in preventing blood backflow in the blood circulation of the human body. Atrioventricular valves are valves that connect the atria of the heart to the ventricles of the heart, and prevent backflow of blood into the atria.

Many mechanical defects of the atrioventricular valve or the ventricle, such as damage to the leaflets, the chordae tendineae of the valve connecting the leaflets to the papillary muscles, the papillary muscles or the ventricular wall, etc., may cause regurgitation of blood at the atrioventricular valve, i.e. valve regurgitation. Valve regurgitation can cause the annulus to become damaged, dilated or weakened, which can limit the ability of the valve to close adequately against the high pressure of the ventricle, possibly further exacerbating valve regurgitation.

The most common treatment of valve regurgitation relies on valve replacement or repair, including remodeling of the leaflets and annulus, commonly referred to as valvuloplasty. The technique of valve repair relies on suturing adjacent segments of opposing leaflets together, commonly referred to as "bow tie", "edge-to-edge", or "edge-to-edge" techniques.

Clinical studies have shown that suture repair for the mitral valve is very effective, but this technique typically relies on open heart surgery, during which the patient's chest typically needs to be cut through a sternotomy, and the patient is placed in cardiopulmonary bypass. Surgical procedures that open the patient's chest and place the patient in diversion are traumatic, with a high mortality and complication rate.

Minimally invasive catheter-based procedures have been developed to deliver a clamping instrument to an incompetent valve, such as using a clamping instrument to hold a portion of the valve leaflets together, thereby reducing regurgitation. Suture repair of the valve can be effectively performed by delivering the clamping instrument through the femoral vein in a minimally invasive interventional manner. In the prior art, the release of the clamping device is controlled by controlling the delivery rod to move back and forth along the axial direction, but the distance of the delivery rod moving back and forth along the axial direction cannot be controlled stably, and the operation requirement is high.

SUMMERY OF THE UTILITY MODEL

To the technical problem, the utility model aims to provide an adjustable curved mechanism of controlling of delivering system, adjustable curved mechanism of delivering system passes through the intermeshing structure control between the gear and delivers the pole along axial direction back-and-forth movement, can control and deliver the stable removal of pole.

In order to achieve the above object, the present invention provides a control mechanism for a bendable delivery system, including:

a steering handle comprising a base portion and a body portion, the base portion connected to a proximal end of the body portion, the base portion comprising a base housing and a delivery assembly mounted to the base housing;

the proximal end of the control catheter is fixed on the control handle, and the control mechanism is also provided with a control channel which penetrates through the control handle and the control catheter;

a delivery rod mounted to the steering channel, the delivery rod having a proximal end connected to the delivery assembly and a distal end extending out of the steering catheter;

the delivery assembly comprises a delivery gear and a delivery knob, the delivery gear and the delivery knob are respectively installed on the inner side and the outer side of the base shell, the proximal end of the delivery rod is located in the base shell, a plurality of meshing teeth are arranged at a preset position of the proximal end of the delivery rod, the delivery gear is meshed with the meshing teeth, the delivery gear can be driven to rotate by rotating the delivery knob, and the delivery gear can drive the delivery rod to axially move in the control channel.

In some preferred embodiments, the delivery rod further includes a delivery rod handle, a delivery rod chuck and a delivery rod base rod, the distal end of the delivery rod chuck is opened with a clamping groove, the proximal end of the delivery rod base rod is fixed in the clamping groove, the delivery rod handle is fixed at the proximal end of the delivery rod chuck, at least a part of the delivery rod handle is located at the outer side of the base shell, the delivery rod handle is operated to drive the delivery rod chuck and the delivery rod base rod to rotate, and the engaging teeth are formed at the outer side wall of the delivery rod chuck.

In some preferred embodiments, the distal end side of the delivery rod collet has an anti-rotation limiting portion, and the base further includes an anti-rotation pin adapted to be mounted to the base shell and abut against the anti-rotation limiting portion to limit the delivery rod collet.

In some preferred embodiments, the anti-rotation limiting portion is an anti-rotation flat or an anti-rotation slot of the distal side of the delivery rod collet.

In some preferred embodiments, the delivery rod includes a distal segment formed by winding a wire, a proximal segment formed by helically winding an elastic wire, and a transition element between the distal segment and the proximal segment, and the distal segment has a diameter smaller than the diameter of the proximal segment.

In some preferred embodiments, the steering mechanism of the steerable delivery system further comprises a steering pull wire; the body part comprises a body shell and a control assembly arranged in the body shell, the proximal end of the control pull wire is connected with the control assembly, and the distal end of the control pull wire is suitable for being connected with a clamping instrument;

the control assembly comprises a capturing pull wire rod and a locking pull wire rod, the control pull wire comprises a capturing pull wire and a locking pull wire, the far ends of the capturing pull wire and the locking pull wire are respectively connected to the clamping apparatus, and the near ends of the capturing pull wire and the locking pull wire are respectively connected to the capturing pull wire rod and the locking pull wire rod; the body part is also provided with a wire pulling cavity formed in the body shell, and the far ends of the capturing wire pulling rod and the locking wire pulling rod are movably arranged in the wire pulling cavity respectively.

In some preferred embodiments, a set of first latch teeth is oppositely arranged on the outer side wall of the capturing pull rod and/or the locking pull rod, a set of second latch teeth is oppositely arranged on the inner wall of the pull cavity, when the first latch teeth are latched to the second latch teeth, the first latch teeth and the second latch teeth are mutually latched and limited, and the capturing pull rod and/or the locking pull rod cannot axially move in the pull cavity; the catching wire pulling rod and/or the locking wire pulling rod are/is rotated to enable the first clamping teeth and the second clamping teeth to be staggered mutually, and the catching wire pulling rod and/or the locking wire pulling rod can move along the length extending direction of the wire pulling cavity.

In some preferred embodiments, the distal end of the capturing pull wire and/or the locking pull wire rod is in threaded connection with the pull wire cavity, a sliding fixture is rotatably mounted in the capturing pull wire and/or the locking pull wire rod respectively, and the proximal end of the capturing pull wire and/or the locking pull wire is fixed to the sliding fixture.

In some preferred embodiments, the steering mechanism further comprises a bend-adjusting pull wire, and the steering catheter further has a pull wire channel; the body part further comprises a bending adjusting component arranged in the body shell; the bending adjusting pull wire is movably arranged in the pull wire channel, the near end of the bending adjusting pull wire is connected with the bending adjusting assembly, and the far end of the bending adjusting pull wire is connected with the far end of the control catheter.

In some preferred embodiments, the bend regulating assembly includes a base block having an accommodating passage to which the proximal end of the steering catheter is mounted, a reel rotatably mounted to the base block and located at one side of the accommodating passage, and a knob attached to the reel to which the proximal end of the bend regulating wire is attached.

Compared with the prior art, the utility model provides an adjustable curved delivery system's the mechanism of controlling has following at least one beneficial effect:

1. the utility model provides an operation and control mechanism of an adjustable bending delivery system, which controls a delivery rod to move back and forth along the axial direction through a mutual meshing structure between gears, and can control the delivery rod to move stably;

2. the utility model provides a control mechanism of a bending-adjustable delivery system, the far end of a control handle is provided with a body part, the near end is provided with a base part, the body part is provided with a bending-adjusting component and a control component which are respectively used for controlling the angle of the far end of a control catheter and the state of a clamping apparatus, and the base part is provided with a delivery component used for controlling the axial movement of a delivery rod;

3. the utility model provides a delivery system that can transfer and bend, the first reel and the second reel of the subassembly that transfers and bend pass through driving gear and impulsive gear intermeshing, rotate first knob and can drive first reel with second reel antiport, in order to adjust the angle of controlling the pipe distal end.

Drawings

The above features, technical features, advantages and modes of realisation of the present invention will be further described in the following detailed description of preferred embodiments thereof, which is to be read in conjunction with the accompanying drawings.

Fig. 1 is a schematic perspective view of a flexible delivery system according to a preferred embodiment of the present invention;

fig. 2 is an exploded schematic view of the adjustable bend delivery system of the preferred embodiment of the present invention;

fig. 3 is a schematic perspective view of the distal end of the adjustable bend delivery system of the preferred embodiment of the present invention;

fig. 4 is a schematic distal side view of the adjustable bend delivery system of the preferred embodiment of the present invention;

fig. 5 is a schematic distal sectional structural view of the adjustable bend delivery system of the preferred embodiment of the present invention;

fig. 6 is a schematic distal end configuration of the adjustable bend delivery system of the preferred embodiment of the present invention;

FIG. 7 is a schematic view of the connection of the clamping device and the steering catheter of the adjustable bend delivery system of the preferred embodiment of the present invention;

fig. 8 is a schematic top view of a steering handle of the adjustable bend delivery system of the preferred embodiment of the present invention;

FIG. 9 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 8;

FIG. 10 is a cross-sectional view taken along line B-B of FIG. 8;

fig. 11 is a side view of the steering handle of the adjustable bend delivery system of the preferred embodiment of the present invention;

FIG. 12 is a cross-sectional view taken along line C-C of FIG. 11;

fig. 13 is a schematic perspective view of a bending assembly of a steering handle of the bending-adjustable delivery system according to the preferred embodiment of the present invention;

fig. 14 is a schematic top view of a bend adjustment assembly of a steering handle of the bend adjustable delivery system of the preferred embodiment of the present invention;

FIG. 15 is a cross-sectional view taken along line D-D of FIG. 14;

fig. 16 is a schematic structural view of a steering catheter of the adjustable bend delivery system of the preferred embodiment of the present invention;

fig. 17 is a schematic cross-sectional view of a steering catheter of the adjustable bend delivery system of the preferred embodiment of the present invention;

fig. 18 and 19 are schematic structural views of the guide handle of the adjustable bending delivery system according to the preferred embodiment of the present invention;

FIG. 20 is a cross-sectional view taken along line E-E of FIG. 19;

fig. 21 is a perspective view of the steering assembly of the guide handle of the adjustable bend delivery system of the preferred embodiment of the present invention;

fig. 22 is a schematic cross-sectional view of a guide catheter of the adjustable bend delivery system of the preferred embodiment of the present invention;

fig. 23 and 24 are schematic views of the steering catheter of the adjustable bend delivery system of the preferred embodiment of the present invention;

fig. 25 is a schematic structural view of a delivery rod of the adjustable bend delivery system of the preferred embodiment of the present invention;

fig. 26 is a diagram of an application of the adjustable bend delivery system of the preferred embodiment of the present invention;

fig. 27 is an operational schematic diagram of the adjustable bend delivery system of the preferred embodiment of the present invention;

fig. 28 is a perspective view of a stent of the adjustable bend delivery system of the preferred embodiment of the present invention.

The reference numbers indicate:

a guide mechanism 10, a guide handle 11, a guide body 111, a guide cartridge 1111, a guide flushing head 1112, a first snap groove 1113, a second snap groove 1114, a steering assembly 112, a steering base block 1121, a mounting channel 1120, a steering knob 1123, a steering link 1124, a knob gear 1125, a gear plate 1126, a first steering assembly 1127, a second steering assembly 1128, a hemostasis valve 113, a bonnet 1131, a pusher 1132, a choke 1133, a guide catheter 12, an inner catheter 121, an intermediate catheter 122, an outer catheter 123, a steering channel 124, a guide channel 13, a steering wire 14, a first steering wire 141, a second steering wire 142, a manipulation mechanism 20, a manipulation handle 21, a base 211, a base housing 2111, a delivery assembly 2112, a delivery gear 21121, a delivery knob 21122, an anti-rotation pin 2113, a body portion 212, a body housing 2121, a vent hole 2120, a bending adjustment assembly 2122, a base block 21221, a receiving channel 21220, a first reel 21222, a second reel 21223, a third reel 21224, a first knob 21225, a second knob 21226, a drive gear 21227, a driven gear 21228, a first knob post 21231, a second knob post 21232, a first stop 21233, a first resistance 21234, a second stop 21235, a second resistance 21236, a steering assembly 2124, a capture pull rod 21241, a locking pull rod 21242, a rod body 2161, a rod cap 2162, a flow stop 2163, a grip 2164, a pull rod cavity 2127, a first latch 21271, a second latch 21272, a fixed element 2129, a steering catheter 22, a pull wire channel 220, a visualization element 221, a tuning channel 222, a steering tube 223, a delivery rod 23, an engagement tooth 231, a delivery rod handle 232, a delivery rod cartridge 233, an anti-rotation plane 2331, a delivery rod base rod 234, a distal segment 2351, a proximal segment 2, a transition element 2353, a control pull wire 24, a steering pull wire 241, a locking pull wire handle 2, a capture pull rod cartridge 2411, a capture pull rod base 2351, the adjustable bending device comprises a first bending adjusting pull wire 2431, a second bending adjusting pull wire 2432, a third bending adjusting pull wire 2433, a control channel 25, a connecting column 26, a connecting element 261, a protrusion 2611, a clamping instrument 30, a bracket 31, a locking groove 310, a containing space 311, an attaching column 32, a connecting hub 321, a connecting hole 3210, an anchoring arm 33, an anchoring hook 330, a clamping arm 34, a clamping hole 340, an actuating rod 35, a central pin 351, a limiting protrusion 352, a locking mechanism 36, a locking block 361, a locking end 3611, a connecting end 3612, an elastic element 362, a flow blocking membrane 37, a bracket 40, a base 41, a first sliding block 42, a second sliding block 43, a first adjusting button 44 and a second adjusting button 45.

Detailed Description

In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.

For the sake of simplicity, only the parts related to the utility model are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "a" means not only "only one of this but also a case of" more than one ".

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.

In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In addition, in the description of the present application, the terms "first," "second," and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

Referring to fig. 1-28, the present invention provides a flexible delivery system that includes a steering mechanism 20. The control mechanism 20 comprises a control handle 21, a control catheter 22 and a control pull wire 24, the control pull wire 24 further comprises a bending pull wire 243, the proximal end of the control catheter 22 is fixed to the control handle 21, and the control mechanism 20 further comprises a control channel 25 which penetrates through the control handle 21 and the control catheter 22; the control catheter 22 further has a pull wire channel 220, the bending wire 243 is movably mounted in the pull wire channel 220, a proximal end of the bending wire is connected to the control handle 21, and a distal end of the bending wire is connected to the distal end of the control catheter 22.

The adjustable bending delivery system further comprises a guide mechanism 10 and a clamping device 30, the control mechanism 20 further comprises a delivery rod 23, and the control pull wire 24 comprises a control pull wire 241. The guiding mechanism 10 comprises a guiding handle 11 and a guiding catheter 12, the proximal end of the guiding catheter 12 is fixed on the guiding handle 11, the guiding mechanism 10 further comprises a guiding channel 13 penetrating the guiding handle 11 and the guiding catheter 12, the control catheter 22 is suitable for being installed on the guiding channel 13, and the distal end of the control catheter 22 passes through the guiding channel 13. The clamping device 30 is adapted to be mounted on the distal end of the steering catheter 22, and the distal ends of the delivery rod 23 and the steering wire 241 are respectively adapted to be connected to the clamping device 30 for controlling the clamping device 30.

Referring to fig. 26 and 27, the preset position of the clamping instrument 30 implanted in the heart can be controlled by the guide mechanism 10 and the manipulation mechanism 20, and the posture of the clamping instrument 30 can be manipulated by the manipulation mechanism 20 to fix a portion of the valve leaflets together by the clamping instrument 30, thereby reducing regurgitation. The control mechanism 20 has high controllability, and can realize accurate positioning and improve the implantation precision of the clamping apparatus 30.

It should be noted that the bendable delivery system formed by the guide mechanism 10, the manipulating mechanism 20 and the clamping device 30 can precisely deliver the clamping device 30 to the target implantation position through the guide mechanism 10 and the manipulating mechanism 20, i.e. through the blood vessel, especially the femoral vein to deliver the clamping device 30 to the mitral valve between the left atrium and the left ventricle, and can control the clamping device 30 to capture, clamp and separate from the mitral valve outside the human body.

It should be further noted that, in the preferred embodiment, the bending control wire 243 and the control handle 21 of the control mechanism 20 can control the bending of the distal end of the control catheter 22, and the delivery of the clamping device 30 can be completed by the two-layer catheter structure formed by the control mechanism 20 and the guiding mechanism 10 cooperating with each other, so that the external dimension of the part of the bending-adjustable delivery system entering the human body is reduced, and the bending-adjustable delivery system is more adaptive to the human body, especially more easily passes through the blood vessels and the atrial septum, and is less likely to cause surgical defects to the atrial septum.

Referring to fig. 3, 4, 5 and 6, further, the control mechanism 20 further includes a connecting post 26 disposed at the distal end of the control catheter 22. The clamping instrument 30 comprises a bracket 31, an attachment post 32, an anchoring arm 33, a clamping arm 34, and an actuating rod 35, the distal end of the attachment post 32 being fixed to the bracket 31, the proximal end being detachably connected to the distal end of the attachment post 26, the clamping arm 34 being rotatably mounted to the bracket 31, the anchoring arm 33 being movably mounted to the bracket 31 so as to be able to move closer to or away from the attachment post 32, the actuating rod 35 being movably mounted in the attachment post 32, and the distal end of the actuating rod 35 being connected to the clamping arm 34, the proximal end of the actuating rod 35 being detachably connected to the distal end of the delivery rod 23, axial movement of the actuating rod 35 being able to bring about rotation of the clamping arm 34 relative to the bracket 31.

The control pulling wire 241 comprises a capturing pulling wire 2411, the proximal end of the capturing pulling wire 2411 is connected to the control handle 21, the distal end of the capturing pulling wire 2411 is connected to the anchoring arm 33, and axial movement of the capturing pulling wire 2411 can drive the anchoring arm 33 to approach or separate from the attachment column 32.

Further, the clamping instrument 30 also includes a locking mechanism 36. The locking mechanism 36 includes a locking block 361 and an elastic element 362, the distal end of the bracket 31 has a locking groove 310, the locking block 361 is rotatably installed in the locking groove 310, the locking block 361 has a locking end 3611 and a connecting end 3612, and the elastic element 362 is installed in the locking groove 310 and abuts against the locking block 361.

The control pulling wire 24 further comprises a locking pulling wire 2412, a proximal end of the locking pulling wire 2412 is connected to the control handle 21, and a distal end is connected to the connecting end 3612 of the locking block 361. In the locked state, the locking end 3611 abuts against the distal end of the actuating lever 35; pulling the locking pulling wire 2412 drives the locking block 361 to rotate, so that the locking end 3611 is separated from the actuating rod 35, and the elastic element 362 is compressed. After the locking pulling wire 2412 is released, the locking block 361 is pushed to rotate to return under the elastic restoring force of the elastic element 362, and the locking end 3611 abuts against the actuating rod 35 to limit the actuating rod 35.

Referring to fig. 3 and 4, the distal end of the steering catheter 22 is provided with a visualization element 221 for marking the position of the distal end of the steering catheter 22 for easy manipulation by the operator. Preferably, the visualization element 221 is annularly arranged around the distal end of the manipulation catheter 22.

Referring to fig. 3 to 6, the proximal end of the attachment post 32 is provided with a connecting hub 321, the proximal end of the connecting hub 321 being detachably connected to the distal end of the attachment post 26, the distal end of the connecting hub 321 being fixed to the attachment post 32.

The side wall of the connecting hub 321 is provided with a connecting hole 3210. The distal end of the connecting column 26 is provided with at least one connecting member 261, the proximal end of the connecting member 261 is rotatably connected to the connecting column 26, and the distal end of the connecting member 261 is provided with a protrusion 2611. A portion of the connection member 261 protrudes into the connection hub 321, and the protrusion 2611 protrudes into the connection hole 3210. The proximal end of the actuation rod 35 extends into the interior of the coupling hub 321, and the distal end of the delivery rod 23 extends from the interior of the coupling post 26 to the interior of the coupling hub 321 and is removably coupled to the proximal end of the actuation rod 35. At this time, the delivery rod 23 abuts on the connecting element 261, the space inside the connecting hub 321 is not enough to make the protrusion 2611 fall out of the connecting hole 3210, and the control catheter 22 and the clamping device 30 are kept in a connected state.

After the distal end of the delivery rod 23 is separated from the proximal end of the actuating rod 35, the delivery rod 23 can be separated from the connecting element 261, the protrusion 2611 of the connecting element 261 can be removed from the connecting hole 3210 of the connecting hub 321, and the steering catheter 22 can be separated from the clamping device 30.

Preferably, the distal end of the delivery rod 23 is threadedly coupled to the proximal end of the actuating rod 35, and the coupling or decoupling of the delivery rod 23 to or from the actuating rod 35 can be controlled by rotating the delivery rod 23.

Referring to fig. 4, the clamping device 30 further includes a choke membrane 37 disposed outside the clamping arm 34 and the locking mechanism 36.

The clamping arm 34 and the anchoring arm 33 are configured to cooperate to clamp a target tissue therebetween, such as, but not limited to, a valve or the like.

The clamping arm 34 is provided with a clamping hole 340, the anchoring arm 33 is provided with an anchoring hook 330, and when the clamping arm 34 and the anchoring arm 33 are close enough, the anchoring hook 330 can extend into the clamping hole 340 to fix the valve between the clamping arm 34 and the anchoring arm 33. The anchoring hooks 330 are sized to extend partially into the target tissue to increase friction and improve stability of the target tissue fixation, and the anchoring hooks 330 are sized small enough to be separated from the captured target tissue without causing irreversible damage to the target tissue.

The bracket 31 is a hollow structure and includes a front outer side wall and a rear outer side wall, and a receiving space 311 is formed between the two outer side walls. The connecting end of the clamping arm 34 has an inner hole and an outer hole (not shown in the figure), the connecting end of the clamping arm 34 extends into the accommodating space 311 of the bracket 31, and the outer hole is rotatably connected with the bracket 31 through a pin and can rotate around the pin.

A central pin 351 is arranged at a preset position of the actuating rod 35, and the central pin 351 is clamped in the inner hole of the clamping arm 34. The actuating rod 35 can move the central pin 351 during the distal or proximal movement under the action of the external force, and the central pin 351 can rotate the clamping arm 34 relative to the bracket 31.

Illustratively, when the actuating rod 35 is pulled to move proximally, the central pin 351 drives the clamping arm 34 to move away from the bracket 31, and the clamping arm 34 is unfolded; when the actuating rod 35 is pushed to move distally, the central pin 351 drives the clamping arm 34 to move in a direction close to the bracket 31, and the clamping arm 34 abuts against one side of the bracket 31 to form a closed state. The locking piece 361 abuts on the distal end of the actuating lever 35, and when the locking mechanism 36 is in the locked state, the actuating lever 35 cannot be pulled, and the position of the clamping arm 34 is fixed.

The connecting end of the anchoring arm 33 extends into the accommodating space 311 of the bracket 31, the connecting end of the anchoring arm 33 is rotatably connected to the bracket 31, the distal end of the capturing wire 2411 is connected to the anchoring arm 33, and pulling the capturing wire 2411 can drive the anchoring arm 33 to rotate relative to the bracket 31.

Referring to fig. 5, which shows the clamping instrument 30 in a closed state, the clamping arm 34 is disposed against the holder 31; the locking mechanism 36 is in the locked state and the actuating rod 35 is locked. In some modified embodiments, a plurality of locking grooves are formed at a predetermined position at the distal end of the actuating rod 35 for accommodating the locking end 3611 of the locking block 361, so as to increase the friction force of the locking end 3611 abutting against the actuating rod 35, increase the locking force, and maintain the stability of the locking mechanism 36 in the locking state.

In some variant embodiments, the bottom wall of the housing space 311 of the bracket 31 is provided with a housing groove, and at least a part of the elastic element 362 is mounted in the housing groove. In some variant embodiments, the predetermined position of the anchoring arms 33 is also open with a housing groove for housing the elastic element 362.

Referring to fig. 5, in some variant embodiments, the preset position of the actuating rod 35 is further provided with a limiting protrusion 352, the limiting protrusion 352 is a column with a substantially circular plane or a small height, and is preferably provided at the connection between the attaching column 32 and the bracket 31, and the connection between the attaching column 32 and the bracket 31 can limit the moving range of the actuating rod 35, and limit the distance of the actuating rod 35 moving towards the proximal end.

Referring to fig. 8, 9 and 17, the manipulation handle 21 includes a base portion 211 and a body portion 212, the base portion 211 is connected to a proximal end of the body portion 212, and the manipulation channel 25 penetrates the base portion 211 and the body portion 212. The proximal end of the steering catheter 22 is secured to the body portion 212.

Further, the body portion 212 includes a body housing 2121 and a bending adjusting assembly 2122, and the bending adjusting assembly 2122 is mounted to the body housing 2121. The distal end of the bending wire 243 is connected to the distal end of the control catheter 22, the proximal end is connected to the bending assembly 2122, and the bending assembly 2122 can be operated to tighten or loosen the bending wire 243 to adjust the bending angle of the distal end of the control catheter 22. The steering catheter 22 further has a bend-adjusting channel 222, and the bend-adjusting pull wire 243 is installed in the bend-adjusting channel 222.

Referring to fig. 17, preferably, the number of the bending cables 243 is three, which are a first bending cable 2431, a second bending cable 2432 and a third bending cable 2433, the distal ends of the three bending cables 243 are arranged in a substantially triangular shape, and the straight line where the distal ends of the first bending cable 2431 and the second bending cable 2432 are located passes through the center of the steering catheter 22. Correspondingly, the number of the bending adjusting passages 222 is also three, and the first bending adjusting pulling wire 2431, the second bending adjusting pulling wire 2432 and the third bending adjusting pulling wire 2433 are respectively accommodated in the passages.

The kick-up assembly 2122 includes a base block 21221, a reel to which the proximal end of the kick-up wire 243 is connected, and a knob, the base block 21221 having a receiving passage 21220, the proximal end of the steering catheter 22 being mounted to the receiving passage 21220, the reel being rotatably mounted to the base block 21221 and located at one side of the receiving passage 21220.

The reels include a first reel 21222, a second reel 21223, and a third reel 21224; the knobs include a first knob 21225 and a second knob 21226. The first and second reels 21222 and 21223 are rotatably mounted to the base 21221 on opposite sides of the receiving passage 21220, respectively, the third reel 21224 is rotatably mounted to the base 21221, the first tuning bend wire 2431 is connected at a proximal end thereof to the first reel 21222, the second tuning bend wire 2432 is connected at a proximal end thereof to the second reel 21223, and the third tuning bend wire 2433 is connected at a proximal end thereof to the third reel 21224.

Preferably, the proximal ends of the first bending wire 2431, the second bending wire 2432 and the third bending wire 2433 respectively exit from the proximal sidewall of the control catheter 22.

Referring to fig. 13 and 14, the steering assembly 2122 further includes a driving gear 21227 and a driven gear 21228, the driving gear 21227 is fixed to the first reel 21222, the driven gear 21228 is fixed to the second reel 21223, and the driving gear 21227 is engaged with the driven gear 21228.

The first knob 21225 is connected to the first reel 21222, at least a part of the first knob 21225 extends to the outside of the body housing 2121, the first reel 21222 and the second reel 21223 can be driven to rotate reversely by rotating the first knob 21225, and the second reel 21223 releases the second bend-adjusting cable 2432 when the first reel 21222 winds the first bend-adjusting cable 2431; the second knob 21226 is attached to the third reel 21224, and at least a portion of the second knob 21226 extends to the outside of the body case 2121, and rotation of the second knob 21226 causes the third reel 21224 to rotate.

Preferably, the base block 21221 has three rotation grooves in which the three reels are mounted, respectively, of the first reel 21222, the second reel 21223, and the third reel 21224.

In some variant embodiments, the drive gear 21227 is integrally formed with the first reel 21222, and the driven gear 21228 is integrally formed with the second reel 21223.

Preferably, the first knob 21225 and the second knob 21226 are respectively located at two opposite sides of the body housing 2121, and the two knobs are arranged in a staggered manner, so that the space of the body housing 2121 can be fully utilized. Preferably, the first knob 21225 is connected to the first reels 21222 via a first knob post 21231, and the second knob 21226 is connected to the third reels 21224 via a second knob post 21232.

Referring to fig. 15, a predetermined position of the first knob post 21231 is provided with a first blocking member 21233, the base block 21221 is provided with a first resistance member 21234 corresponding to the first blocking member 21233, the first blocking member 21233 abuts against the first resistance member 21234, and the first knob post 21231 is limited by a friction force between the first blocking member 21233 and the first resistance member 21234, such that the first knob post 21231 is not spontaneously rotated when not subjected to an external force. Accordingly, the preset position of the second knob post 21232 is provided with a second stopper 21235, the base block 21221 is provided with a second resistance 21236 corresponding to the second stopper 21235, the second stopper 21235 abuts against the second resistance 21236, and the second knob post 21232 is limited by the friction force between the second stopper 21235 and the second resistance 21236, so that the second knob post 21232 is not spontaneously rotated when not being subjected to an external force.

Referring to fig. 8, the body portion 212 further includes a steering assembly 2124, the steering assembly 2124 includes two wire rods, each being a capturing wire rod 21241 and a locking wire rod 21242, the capturing wire rod 21241 and the locking wire rod 21242 being movably mounted to the body housing 2121, the capturing wire 2411 being connected at a proximal end thereof to the capturing wire rod 21241, and the locking wire 2412 being connected at a proximal end thereof to the locking wire rod 21242, the capturing wire rod 21241 being operable to axially move the capturing wire 2411, and the locking wire rod 2412 being operable to axially move the locking wire rod 21242.

The wire pulling rod comprises a rod body 2161, a rod cap 2162, a flow resisting part 2163 and a holding part 2164. The lever body 2161 is a hollow tube, the proximal end of the catching wire 2411 or the locking wire passes through the lever body 2161 and is fixed between the lever cap 2162 and the proximal end of the lever body 2161, the flow blocking member 2163 is arranged at the connection between the lever cap 2162 and the lever body 2161, and the grip member 2164 extends outwards from one side of the lever body 2161 to facilitate the grip of an operator.

The body housing 2121 further has a wire cavity 2127 at a predetermined position, and distal ends of the capturing wire rod 21241 and the locking wire rod 21242 are movably mounted in the wire cavity 2127.

Referring to fig. 10, a set of first latch 21271 is respectively disposed on the upper side and the lower side of the wire pulling rod, a set of second latch 21272 is respectively disposed on the upper inner wall and the lower inner wall of the wire pulling cavity 2127, when the first latch 21271 is latched to the second latch 21272, the first latch 21271 and the second latch 21272 are latched to limit each other, and the wire pulling rod cannot axially move in the wire pulling cavity 2127; rotating the wire pulling rod to make the first latch 21271 and the second latch 21272 staggered from each other can pull the wire pulling rod axially in the wire pulling cavity 2127.

In some variations, the distal end of the wire pulling rod is threaded to the inner wall of the wire pulling lumen 2127, and turning the wire pulling rod can control the wire pulling rod to tighten or loosen the capture wire 2411 or the locking wire 2412. The wire pulling rod further comprises a sliding fixture (not shown in the figures), the proximal end of the capturing pulling wire 2411 or the locking pulling wire 2412 is fixed on the sliding fixture, and the sliding fixture is rotatably arranged at the proximal end of the rod body 2161. When the lever body 2161 is rotated, the slide latch can be rotated with respect to the lever body 2161, thereby preventing or reducing the rotation of the catching wire 2411 or the locking wire 2412.

Referring to fig. 12, a fixing element 2129 is further disposed in the pull wire lumen 2127, and the delivery rod 23 extends distally from the base 211 through the fixing element 2129, and the fixing element 2129 can improve the stability of the delivery rod 23 and also has a liquid leakage preventing effect.

Referring to fig. 9, the base 211 includes a base 2111 and a delivery assembly 2112, the delivery assembly 2112 includes a delivery gear 21121 and a delivery knob 21122, and the delivery gear 21121 and the delivery knob 21122 are respectively installed at inner and outer sides of the base 2111. The proximal end of the delivery rod 23 is located in the base housing 2111, a plurality of engaging teeth 231 are formed at a predetermined position of the proximal end of the delivery rod 23, the delivery gear 21121 is engaged with the plurality of engaging teeth 231 on the delivery rod 23, the delivery gear 21121 can be driven to rotate by rotating the delivery knob 21122, and the delivery rod 23 can be driven to axially move by the delivery gear 21121.

Further, the delivery rod 23 further includes a delivery rod handle 232, a delivery rod clamp 233 and a delivery rod base rod 234, a clamping slot is opened at a distal end of the delivery rod clamp 233, a proximal end of the delivery rod base rod 234 is fixed in the clamping slot, the delivery rod handle 232 is fixed at a proximal end of the delivery rod clamp 233, at least a portion of the delivery rod handle 232 is located outside the base shell 2111, and the delivery rod clamp 233 and the delivery rod base rod 234 can be driven to rotate by operating the delivery rod handle 232. The engagement teeth 231 are formed at the outer side wall of the delivery rod cartridge 233.

Referring to fig. 9, the distal side of the delivery rod collet 233 has an anti-rotation flat 2331. The base 211 further comprises anti-rotation pins 2113, the anti-rotation pins 2113 are mounted to the base housing 2111, and the anti-rotation pins 2113 abut against the anti-rotation plane 2331 to prevent rotation of the delivery rod collet 233; after the anti-rotation pins 2113 are disengaged from the anti-rotation plane 2331, the delivery rod cartridge 233 can be rotated within the base housing 2111.

Further, a vent hole 2120 is formed at one side of the body housing 2121 of the body portion 212, and the vent hole 2120 communicates with the wire chamber 2127.

Referring to fig. 18, 19 and 20, the guide handle 11 includes a guide body 111 and a steering assembly 112, and the steering assembly 112 is mounted to the guide body 111.

Referring to fig. 22, the guiding mechanism 10 further includes a steering wire 14, a proximal end of the steering wire 14 is connected to the steering assembly 112, a distal end of the steering wire 14 is connected to the distal end of the guiding catheter 12, and the steering assembly 112 is operated to axially move the steering wire 14 to adjust the angle of the distal end of the guiding catheter 12.

Specifically, the number of the steering assemblies 112 is two, the number of the steering wires 14 is also two, the proximal ends of the two steering wires 14 are respectively connected to the two steering assemblies 112, and the distal ends of the two steering wires 14 are respectively connected to different positions of the distal end of the guiding catheter 12. Preferably, the connecting line of the connection of the distal ends of the two steering wires 14 and the distal end of the guiding catheter 12 does not pass through the center of the guiding catheter 12. The two steering wires 14 are a first steering wire 141 and a second steering wire 142, respectively, the two steering members 112 are a first steering member 1127 and a second steering member 1128, respectively, the proximal end of the first steering wire 141 is attached to the first steering member 1127, and the proximal end of the second steering wire 142 is attached to the second steering member 1128. The first steering wire 141 and the second steering wire 142 are respectively installed in the two steering channels 124 of the guide catheter 12.

Further, the steering assembly 112 includes a steering base block 1121, a steering reel (not shown in the drawings) rotatably mounted to the steering base block 1121, and a steering knob 1123 connected to the steering reel, and at least a portion of the steering knob 1123 extends to the outside of the guide body 111, and turning the steering knob 1123 causes the steering reel to rotate to control the steering wire 14 to axially move.

The steering assembly 112 further includes a steering link 1124, a knob gear 1125, and a gear plate 1126, the steering knob 1123 is mounted to one end of the steering link 1124, the knob gear 1125 is mounted to the other end of the steering link 1124, the gear plate 1126 is connected to the steering reel, and the gear plate 1126 and the knob gear 1125 are engaged with each other, turning the steering knob 1124 rotates the steering link 1124 and the knob gear 1125, and the knob gear 1125 rotates the gear plate 1126 and the steering reel.

Further, the steering assembly 112 further includes a stopper mounted to the rotating wheel of the steering reel and a resistance piece mounted inside the steering base block 1121, the stopper abutting against the resistance piece to increase resistance to rotation of the steering reel, improving stability of the steering reel when not subjected to force.

The steering base block 1121 has a mounting channel 1120 at a predetermined position, the proximal end of the guide catheter 12 is mounted to the mounting channel 1120, and the proximal end of the steering wire 14 extends out of the proximal end of the guide catheter 12 and is connected to the steering reel.

Preferably, the steering knobs 1123 and the gear plate 1126 are respectively located at both sides of the steering base block 1121, and the two steering knobs 1123 of the two steering assemblies 112 are respectively located at different sides of the guide body 111, so that the space of the guide body 111 can be sufficiently utilized, the volume of the guide body 111 can be reduced, and the mutual interference when the knobs are turned can be prevented.

Referring to fig. 18 and 21, the guiding handle 11 further includes a hemostasis valve 113 disposed at the proximal end of the guiding body 111, the hemostasis valve 113 includes a bonnet 1131, a pushing portion 1132 installed on the bonnet 1131, and a blocking member 1133, the blocking member 1133 is installed at the proximal end of the guiding body 111, the bonnet 1131 is installed at the proximal end of the guiding body 111, the pushing portion 1132 abuts against the blocking member 1133, the guiding channel 13 passes through the bonnet 1131, the pushing portion 1132 and the blocking member 1133, and the pushing portion 1132 can press the blocking member 1133 by pushing the pushing portion 1132 distally, so that the blocking member 1133 radially deforms and blocks the guiding channel 13 to achieve a sealing effect.

Further, the proximal end of the guiding body 111 is provided with a guiding collet 1111, the proximal end of the guiding catheter 12 is fixed to the distal end of the guiding collet 1111, and the valve cap 1131 of the hemostatic valve 113 is rotatably mounted to the proximal end of the guiding collet 1111. Preferably, the bonnet 1131 is threadably coupled to a proximal end of the guide collet 1111, and rotating the bonnet 1131 relative to the guide collet 1111 controls the axial movement of the bonnet 1131.

Further, the preset position of the guiding collet 1111 is further provided with a guiding flushing head 1112, and the guiding flushing head 1112 is communicated with the guiding catheter 12.

Referring to fig. 27, pulling the first steering pull wire 141 proximally can move the distal end of the guiding catheter 12 in one or three directions of movement, controlling the distal end of the guiding catheter 12 to move in a direction approaching the plane of the ring; operation of the first steering assembly 1127 controls distal movement of the first steering wire 141, which controls movement of the distal end of the guiding catheter 12 in the second direction of movement, and movement of the distal end of the guiding catheter 12 away from the plane of the ring. Operation of the second steering assembly 1128 causes axial movement of the second steering pull wire 142, which controls the fine adjustment of the distal end of the guiding catheter 12 to one side.

Rotation of the first knob 21225 can control axial movement of the first and second bend wires 2431, 2432 to control movement of the distal end of the operating catheter 22 in either the fourth or fifth direction of movement; rotation of the second knob 21226 controls axial movement of the third bend wire 2433 to control movement of the distal end of the operating catheter 22 in the direction of movement six.

Referring to fig. 27, the distal end of the guiding catheter 12 is controlled to bend along the moving direction by operating the guiding handle 11, so that the distal end of the guiding catheter 12 moves to a positioning position above the annular plane (valve annulus position), wherein the distal plane of the guiding catheter 12 is substantially parallel to the annular plane; the guiding handle 11 is further operable to control the guiding catheter 12 to move from the positioning position in the second moving direction until the distal plane of the guiding catheter 12 is substantially perpendicular to the plane of the ring, at which time the guiding catheter 12 is in a substantially straightened state, which is more convenient for the steering catheter 22 and the clamping device 30 to pass through, and may be referred to as a delivery position; the distal end of the guiding catheter 12 is controlled by operating the guiding handle 11 to move in the third direction of movement, returning to a position above the plane of the ring. In the positioning position, a portion of the steering catheter 22 extends from the distal end of the guiding catheter 12, and the operation handle 21 is operable to control the distal end of the steering catheter 22 to move along a fourth moving direction, a fifth moving direction and a sixth moving direction, wherein the fourth moving direction and the fifth moving direction are substantially along the same axis x, the sixth moving direction is substantially along the axis y, and the plane of the axis x and the axis y is substantially the plane of the distal end of the steering catheter 22. In the positioning position, operation of the guiding handle 11 also controls the distal end of the guiding catheter 12 to be movable in an auxiliary direction, which is arranged to be a minor position adjustment of the distal end of the guiding catheter 12 to produce a position change in the auxiliary direction for the position of the distal end of the steering catheter 22.

Referring to fig. 16, 17 and 22, the guiding catheter 12 and the steering catheter 22 are three-layer catheters comprising an inner catheter 121, an intermediate catheter 122 and an outer catheter 123, respectively. In the guide catheter 12, the steering wires 14 are provided between the inner layer catheter 121 and the intermediate layer catheter 122. In the steering catheter 22, the bending wire 243 is disposed between the inner catheter 121 and the middle catheter 122, and the wire passage 220 is formed in the space surrounded by the inner catheter 121.

During the manufacturing process of the steering catheter 22, the catheter forming the pull wire channel 220 is placed outside the catheter forming the steering channel 25; then the inner layer conduit 121 is coated on the outer side; a conduit for forming the bend-adjusting channel 222 is arranged on the outer side of the inner conduit 121, and a gap between the two forms the bend-adjusting channel 222; the catheter for forming the bending wire 243 is externally covered with the intermediate catheter 122, and then externally covered with the outer catheter 123. Preferably, the intermediate layer conduits 122 are a mesh structure. The manufacturing process of the guiding catheter 12 is similar to that of the steering catheter 22, and will not be described herein.

Referring to fig. 23 and 24, the steering tube 223 of the steering catheter 22 forming the steering channel 25 is formed by several wires arranged in sequence and surrounded by a plurality of layers of wire in a stacked arrangement. Preferably, the plurality of wires forming the manipulation channel 25 are respectively spirally bent in a length direction, so that the overall structural strength can be increased.

Preferably, the catheter forming the steering channel 25 has an outer diameter equal to the outer diameter of the attachment post 26 and is connected to the proximal end of the attachment post 26.

The delivery rod 23 is an elongated rod, and the delivery rod 23 is also formed by several wires arranged in sequence and surrounded, in some variant embodiments, by a multi-layer wire stack arrangement. Preferably, the distal diameter of the delivery rod 23 is smaller than the diameter of the proximal end.

Referring to fig. 25, in some variant embodiments, the delivery rod 23 is a segmented structure including a distal segment 2351, a proximal segment 2352, and a transition element 2353 between the distal segment 2351 and the proximal segment 2352, the proximal segment 2351 is formed by a wire wrap, the distal segment 2351 is formed by a spring wire spiral wrap, and the distal segment 2351 has a diameter smaller than the diameter of the proximal segment 2352, effective to reduce the stiffness of the distal end of the delivery rod 23 to reduce the effect of the delivery rod 23 on the clamping instrument 30.

Referring to fig. 28, the bendable delivery system further includes a bracket 40, and the guide mechanism 10 and the manipulation mechanism 20 are respectively mounted to the bracket 40. The bracket 40 includes a base 41, a first slider 42 and a second slider 43, the first slider 42 and the second slider 43 are slidably mounted on the base 41, the guiding mechanism 10 is mounted on the first slider 42, and the operating mechanism 20 is mounted on the second slider 20.

The distal end of the guide body 111 of the guide handle 11 is provided with a first clamping groove 1113, the distal end of the body part 212 of the control handle 21 is provided with a second clamping groove 1114, the first clamping groove 1113 is suitable for being clamped in a first clamping portion of the first slider 42, and the second clamping groove 1114 is suitable for being clamped in a second clamping portion of the second slider 43.

The bracket 40 further includes a first adjusting knob 44 and a second adjusting knob 45 mounted on the base 41, the first adjusting knob 44 is connected to the first slider 42, the second adjusting knob 45 is connected to the second slider 43, and the first slider 42 and the second slider 43 can be controlled to move relative to the base 41 by operating the first adjusting knob 44 and the second adjusting knob 45.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and embellishments can be made without departing from the principle of the present invention, and these modifications and embellishments should also be regarded as the protection scope of the present invention.

Claims (10)

1. A steering mechanism for a flexible delivery system, comprising:

a steering handle comprising a base portion and a body portion, the base portion connected to a proximal end of the body portion, the base portion comprising a base housing and a delivery assembly mounted to the base housing;

the proximal end of the control catheter is fixed on the control handle, and the control mechanism is also provided with a control channel which penetrates through the control handle and the control catheter;

a delivery rod mounted to the steering channel, the delivery rod having a proximal end connected to the delivery assembly and a distal end extending out of the steering catheter;

the delivery assembly comprises a delivery gear and a delivery knob, the delivery gear and the delivery knob are respectively installed on the inner side and the outer side of the base shell, the proximal end of the delivery rod is located in the base shell, a plurality of meshing teeth are arranged at a preset position of the proximal end of the delivery rod, the delivery gear is meshed with the meshing teeth, the delivery gear can be driven to rotate by rotating the delivery knob, and the delivery gear can drive the delivery rod to axially move in the control channel.

2. The steering mechanism of an adjustable bending delivery system according to claim 1, wherein the delivery rod further comprises a delivery rod handle, a delivery rod chuck and a delivery rod base rod, a clamping groove is formed at a distal end of the delivery rod chuck, a proximal end of the delivery rod base rod is fixed in the clamping groove, the delivery rod handle is fixed at the proximal end of the delivery rod chuck, at least a portion of the delivery rod handle is located at an outer side of the base shell, the delivery rod chuck and the delivery rod base rod can be driven to rotate by operating the delivery rod handle, and the engaging teeth are formed at an outer side wall of the delivery rod chuck.

3. The steering mechanism of claim 2, wherein the distal end of the delivery rod clamp has an anti-rotation limiting portion, and the base further comprises an anti-rotation pin adapted to be mounted to the base housing and abut against the anti-rotation limiting portion to limit the delivery rod clamp.

4. The steering mechanism of an adjustable bending delivery system according to claim 3, wherein the anti-rotation limiting part is an anti-rotation plane or an anti-rotation slot on the distal side of the delivery rod chuck.

5. The steering mechanism of the steerable delivery system of claim 2, wherein the delivery rod comprises a distal segment, a proximal segment, and a transition element between the distal segment and the proximal segment, wherein the proximal segment is formed by a wire wrap, wherein the distal segment is formed by a helical wrap of an elastic wire, and wherein the distal segment has a diameter that is smaller than the diameter of the proximal segment.

6. The steering mechanism of the tunable delivery system of any one of claims 1-5, further comprising a steering pull wire; the body part comprises a body shell and a control assembly arranged in the body shell, the proximal end of the control pull wire is connected with the control assembly, and the distal end of the control pull wire is suitable for being connected with a clamping instrument;

the control assembly comprises a capturing pull wire rod and a locking pull wire rod, the control pull wire comprises a capturing pull wire and a locking pull wire, the far ends of the capturing pull wire and the locking pull wire are respectively connected to the clamping apparatus, and the near ends of the capturing pull wire and the locking pull wire are respectively connected to the capturing pull wire rod and the locking pull wire rod; the body part is also provided with a wire pulling cavity formed in the body shell, and the far ends of the capturing wire pulling rod and the locking wire pulling rod are movably arranged in the wire pulling cavity respectively.

7. The control mechanism of the adjustable bending delivery system according to claim 6, wherein the outer side wall of the capturing wire-pulling rod and/or the locking wire-pulling rod is provided with a set of first latch teeth oppositely, the inner wall of the wire-pulling cavity is provided with a set of second latch teeth oppositely, when the first latch teeth are latched with the second latch teeth, the first latch teeth and the second latch teeth are mutually latched and limited, and the capturing wire-pulling rod and/or the locking wire-pulling rod cannot move axially in the wire-pulling cavity; the catching wire pulling rod and/or the locking wire pulling rod are/is rotated to enable the first clamping teeth and the second clamping teeth to be staggered mutually, and the catching wire pulling rod and/or the locking wire pulling rod can move along the length extending direction of the wire pulling cavity.

8. The steering mechanism of an adjustable bend delivery system according to claim 6, wherein the distal end of the capturing pull wire and/or the locking pull wire rod is screwed to the pull wire cavity, a sliding block is rotatably mounted in the capturing pull wire and/or the locking pull wire rod, respectively, and the proximal end of the capturing pull wire and/or the locking pull wire is fixed to the sliding block.

9. The steering mechanism of the tunable bend delivery system of claim 6, further comprising a bend tuning pull wire, the steering catheter further having a pull wire channel; the body part further comprises a bending adjusting component arranged in the body shell; the bending adjusting pull wire is movably arranged in the pull wire channel, the near end of the bending adjusting pull wire is connected with the bending adjusting component, and the far end of the bending adjusting pull wire is connected with the far end of the control catheter.

10. The steering mechanism of the adjustable bend delivery system according to claim 9, wherein the bend adjustment assembly includes a base block having a receiving channel, a reel to which the proximal end of the steering catheter is mounted, and a knob rotatably mounted to the base block and located to one side of the receiving channel, the knob being connected to the reel to which the proximal end of the bend adjustment cable is connected.

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