CN211935126U

CN211935126U - Adjustable bent sheath tube

Info

Publication number: CN211935126U
Application number: CN201922271986.7U
Authority: CN
Inventors: 江巍; 彭峰
Original assignee: Lifetech Scientific Shenzhen Co Ltd
Current assignee: Lifetech Scientific Shenzhen Co Ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-11-17
Anticipated expiration: 2029-12-17

Abstract

The utility model relates to an adjustable curved sheath pipe, including body, handle and traction wire, the near-end and the handle of body are connected, and the traction wire includes first traction wire, and the handle includes first guide rail spare, first slider and first rotating subassembly, and first slider is connected with first traction wire, and first rotating subassembly cover is established on first guide rail spare, is provided with first recess on the first guide rail spare, and first slider sets up in the first recess, be provided with the slide in the first recess, first slider includes first surface and second surface, and the inner wall of first surface and first rotating subassembly sets up relatively to be provided with the helicitic texture of mutually supporting, the second surface is provided with the slider, and the slider slides on the slide, realizes that the accent is bent accurately, convenient operation and laborsaving.

Description

Adjustable bent sheath tube

Technical Field

The utility model relates to the field of medical equipment, especially, relate to an adjustable curved sheath pipe.

Background

Medical sheaths have been widely used in minimally invasive interventional diagnostic and therapeutic procedures for creating channels, delivering or retrieving instruments, infusing drugs, or removing bodily fluids. The adjustable bending sheath tube has a function of adjusting the bending of the far end, and can quickly and reliably reach the target lesion position so as to reduce the operation time. The adjustable bent sheath tube for conveying medical instruments in the existing market is provided with a single bent far-end sheath tube head, the position of the far-end sheath tube head can be adjusted through free bending of the far end, but the problems that the angle cannot be accurately adjusted and the operation is laborious exist.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a bending-adjustable sheath tube, which can realize accurate bending adjustment, and is convenient and labor-saving to operate.

An adjustable bending sheath tube comprises a tube body, a handle and a traction wire, wherein the near end of the tube body is connected with the handle, the traction wire is connected with the tube body and the handle,

the traction wire comprises a first traction wire, the handle comprises a first guide rail piece, a first sliding block and a first rotating component, the first sliding block is connected with the first traction wire, the first rotating component is sleeved on the first guide rail piece,

the first guide rail part is provided with a first groove, the first slide block is arranged in the first groove, a slide way is arranged in the first groove,

the first sliding block comprises a first surface and a second surface, the first surface and the inner wall of the first rotating assembly are arranged oppositely and are provided with thread structures matched with each other, and the second surface is provided with a sliding piece which slides on the slide way.

Further, the first groove comprises a first bottom and a first side wall, the slide way is arranged at the first bottom, and the second surface of the first sliding block is arranged opposite to the first bottom.

Further, the first groove comprises a first bottom and a first side wall, the slide way is arranged on the first side wall, and the second surface of the first sliding block is arranged opposite to the first side wall.

Further, the slide is the recess slide, the slider is protruding slider, the recess slide with protruding slider mutually supports, protruding slider is in slide on the recess slide.

Further, the slide is protruding slide, the slider includes the slip recess, protruding slide with the slip recess is mutually supported, the slider is in slide on the protruding slide.

Furthermore, the first sliding block is provided with a containing groove and a through hole, the containing groove is communicated with the through hole, a fixing piece is arranged in the containing groove, one end of the first traction wire penetrates into the through hole and is connected with the fixing piece, and one end of the first traction wire is fixed through the fixing piece.

Furthermore, one end of the first traction wire is connected with the fixing piece through glue.

Further, one end of the first traction wire is wound on the fixing piece.

Furthermore, two slide way stop blocks are arranged on the slide way, and the sliding piece slides between the two slide way stop blocks.

Above-mentioned curved sheath pipe of adjustable sets up first slider in first recess through setting up the first recess on the first guide rail spare, and the first surface of first slider and the inner wall threaded connection of first rotating subassembly can make first slider slide in first recess through the first rotating subassembly of rotating to can control the gliding distance of first slider more easily, thereby can control the angle that the body was transferred and is bent comparatively accurately, convenient operation. Meanwhile, the sliding piece is arranged on the second surface of the first sliding block, the slide way is arranged in the first groove, and the sliding piece slides on the slide way, so that the contact area between the first sliding block and the first groove can be reduced, and the first rotating assembly can be rotated more easily.

Drawings

Fig. 1 is a schematic view of an adjustable bending sheath according to an embodiment.

Fig. 2 is a partial schematic view of an outer shell of an adjustable bending sheath according to an embodiment.

Fig. 3 is a schematic view of a first bending knob of the bending-adjustable sheath according to an embodiment.

Fig. 4 is a partial schematic view of an adjustable bending sheath according to an embodiment.

Fig. 5 is a schematic view of a first transmission thread sleeve of an adjustable bending sheath according to an embodiment.

Fig. 6 is a schematic view of a first rail member of an adjustable bending sheath according to an embodiment.

Fig. 7 is a schematic view of a first rail member and a support member of an adjustable bending sheath according to an embodiment.

Fig. 8 is a schematic view of a first rail member, a first sliding block, and a limiting member of the adjustable bending sheath according to an embodiment. Fig. 9 is a schematic view of a first sliding block of the adjustable bending sheath according to an embodiment.

Fig. 10 is a schematic view of another view of the first slider of the adjustable bending sheath according to an embodiment.

Fig. 11 is a schematic view of the first rail member, the first sliding block, and the tube body of the adjustable bending sheath according to an embodiment of the invention.

Fig. 12 is a schematic view of a second rail member of an adjustable bending sheath according to an embodiment.

Fig. 13 is a schematic view of another part of the adjustable bending sheath according to an embodiment.

Fig. 14 is a schematic view of fig. 13 viewed from a distal to proximal direction.

Fig. 15 is an enlarged view of a portion of the tube body of the adjustable bending sheath according to an embodiment.

Fig. 16 is an enlarged view of a portion of the tube body of the adjustable bending sheath according to yet another embodiment.

Fig. 17 is a schematic view of a first pull wire coupled to a first retaining ring according to one embodiment.

Fig. 18 is another angle view of fig. 17.

Fig. 19 is a schematic view of the operation of the adjustable bending sheath to enter the heart according to an embodiment.

Fig. 20 is a cross-sectional view a-a of fig. 19.

FIG. 21 is a schematic view of a medical device system in one embodiment.

Fig. 22 is a schematic view from another angle of fig. 21.

FIG. 23 is a diagram illustrating the fixing plate when the fixing member is in use according to an embodiment.

Fig. 24 is a schematic view of a fastening plate in a finished state (the outer profile of the fastening element coincides with the trajectory of the fastening element on the fastening plate) according to an embodiment of the invention.

Fig. 25 is a schematic view of a fixing plate in another embodiment of the fixing element in a finished state (the outer contour of the fixing element coincides with the trajectory of the fixing element on the fixing plate).

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

First, it should be emphasized that reference to "proximal" in embodiments of the present invention refers to the end that is closer to the operator during operation; "distal" means the end that is distal to the operator during operation; "axial" refers to a direction parallel to the line joining the center of the distal end and the center of the proximal end of the medical device; "radial" refers to a direction perpendicular to the axial direction.

Referring to fig. 1, the present embodiment provides an adjustable bending sheath 100, which includes a handle 1 and a tube 2, and the proximal end of the tube 2 is connected to the handle 1. In this embodiment, the adjustable bending sheath 100 is a double-adjustable bending sheath, that is, the tube 2 includes two bendable positions.

The handle 1 comprises a shell 11, a first bending adjusting knob 12, a second bending adjusting knob 13, a front end cover 17 and a rear end cover 16 in appearance. Wherein the housing 11 is arranged between the first bending knob 12 and the second bending knob 13. The distal end of the first bending knob 12 abuts against the proximal end of the housing 11, and the proximal end of the first bending knob 12 abuts against the rear end cap 16. The proximal end of the second bending knob 13 abuts against the distal end of the housing 11, and the distal end of the second bending knob 13 abuts against the front end cover 17.

A flared protective sleeve 171 is attached to the distal end of the front end cap 17, the material of the protective sleeve 171 is selected from silicone rubber or rubber, the proximal end of the tube 2 penetrates through the proximal end of the protective sleeve 171, and the protective sleeve 171 is used to prevent the portion of the tube 2 in contact with the protective sleeve 171 from being bent at an excessive angle and broken.

In the present embodiment, the first bending adjustment knob 12 and the second bending adjustment knob 13 respectively rotate relative to the housing 11, and an operator can hold the housing 11 by hand and directly hold the first bending adjustment knob 12 or the second bending adjustment knob 13 by thumb and forefinger to rotate the same, thereby facilitating the operation.

The first bending adjusting knob 12 and/or the second bending adjusting knob 13 and the housing 11 may not be directly abutted, a ring member 111 may be disposed between the first bending adjusting knob 12 and/or the second bending adjusting knob 13 and the housing 11, the ring member 111 is fixedly connected with the housing 11, the first bending adjusting knob 12 or the second bending adjusting knob 13 abuts against the ring member 111, and relative rotation between the first bending adjusting knob 12 or the second bending adjusting knob 13 and the ring member 111 can be realized. The fixed connection mode can be a snap connection or glue fixation. The ring member 111 is added for the purpose of extending the size of the handle 1 while performing a decorative function.

In other embodiments, the first bending adjustment knob 12 and/or the second bending adjustment knob 13 are located in the middle of the housing 11, that is, the middle of the housing 11 is cut off to form a plurality of housing portions, and the first bending adjustment knob 12 and the second bending adjustment knob 13 respectively abut against adjacent housing portions and can realize relative rotation.

The outer shell 11 is substantially a cylindrical structure, the middle of the outer wall of the outer shell 11 is recessed inwards, and the outer diameter of the middle of the outer wall of the outer shell 11 is smaller than the outer diameters of the two ends of the outer wall of the outer shell 11, so that an operator can hold the outer shell conveniently. Optionally, the outer wall of the housing 11 may be provided with anti-slip threads 110 for easy operation.

In fig. 2, a plurality of sets of arc-shaped protrusions are arranged inside the housing 11, each set of arc-shaped protrusions includes two adjacent arc-shaped

protrusions

101 and 103, an arc-shaped groove 104 is formed between the two adjacent arc-shaped

protrusions

101 and 103, and two groove stoppers 102 are arranged at two ends of the arc-shaped groove 104. In this embodiment, for convenience of processing and assembly, the housing 11 may be divided into two halves from the middle, that is, the housing includes a first housing and a second housing, a plurality of snap structures are disposed at the connection point of the first housing and the second housing, and the first housing and the second housing are buckled with each other to form a cylindrical housing. The first housing and the second housing may also be integrally formed.

Referring to fig. 3, the first bending adjustment knob 12 is in a ring structure, and the diameter of the distal opening of each ring structure may be the same as or different from the diameter of the proximal opening of the ring structure, and may be designed according to the shape of the handle. The outer wall of the first bending adjustment knob is provided with anti-slip members 120, such as stripe structures, thread structures, bump structures, and the like. The inner wall of the first bending adjusting knob 12 is provided with a slot structure 121. The second bending adjustment knob 13 and the first bending adjustment knob 12 have the same structure, and the second bending adjustment knob 13 and the first bending adjustment knob 12 may have the same size or different sizes.

Referring to fig. 4, the handle 1 further comprises a first bending adjustment module 14 and a second bending adjustment module 15. Wherein the distal end of the first bending adjustment module 14 is located opposite the proximal end of the second bending adjustment module 15. A first bending adjustment module 14 is disposed within the housing 11 and the first bending adjustment knob 12, and a second bending adjustment module 15 is disposed within the housing 11 and the second bending adjustment knob 13.

Referring to fig. 5, 6 and 7, the first bending adjustment module 14 includes a first transmission screw boss 141, a first rail member 142 and a first slider 143. Wherein the first slide block 143 is slidably disposed on the first rail member 142, and the first transmission screw sleeve 141 is fitted over the first rail member 142 and the first slide block 143.

Referring to fig. 5, the first driving screw 141 has a cylindrical shape, and the first driving screw 141 may be divided into halves from the middle or may be integrally formed, like the housing 11, for convenience of processing and assembly. The inner wall of the first transmission threaded sleeve 141 is provided with a threaded structure 1410, the outer wall of the first transmission threaded sleeve 141 is provided with a convex block structure 1411, and with reference to fig. 3 and 5, the convex block structure 1411 is matched with the slot structure 121 on the inner wall of the first bending adjusting knob 12, so that the first transmission threaded sleeve 141 and the first bending adjusting knob 12 are fixedly connected. It is understood that, in an embodiment, the outer wall of the proximal end of the first transmission threaded sleeve 141 may be provided with a notch structure, and the inner wall of the first bending adjustment knob 12 may be provided with a projection structure, and the notch structure and the projection structure are matched with each other. In an embodiment, the first turning knob 12 and the first transmission threaded sleeve 141 are directly fixed by glue. In the present embodiment, the bump structure 1411 on the outer wall of the first transmission threaded sleeve 141 is located at the proximal end of the first transmission threaded sleeve 141, in other embodiments, the bump structure 1411 may also be located at the middle or distal end of the first transmission threaded sleeve 141, and the position of the bump structure 1411 is mainly set according to the position of the first turning knob 12. In this embodiment, the outer wall of the first transmission screw thread bush 141 is further provided with an annular projection 1412, and it is understood that the inner wall of the housing 11 is provided with a groove structure which is matched with the annular projection 1412, so as to prevent the first transmission screw thread bush 141 from axially moving in the housing 11, but allow the first transmission screw thread bush 141 to rotate relative to the housing.

In the present embodiment, the first turning knob 12 and the first transmission thread bushing 141 constitute a first rotating component, and it is understood that, in other embodiments, the handle 1 may not include the first turning knob 12, that is, the first rotating component may not include the first turning knob 12, and only include the first transmission thread bushing 141, and the first slider is reciprocated on the first rail member by directly rotating the first transmission thread bushing 141.

The far end or the near end of the first guide rail part is provided with a clamping structure, and the clamping structure and the shell are mutually clamped and abutted to avoid axial and radial movement of the first guide rail part. Specifically, referring to fig. 6, the first rail member 142 has a tubular structure, and the distal opening of the first rail member 142 is provided with a holding structure, the holding structure is a "runway-type" annular convex part 1421, the outer circumference of the "runway-type" annular convex part 1421 includes two arc-shaped parts 1423 and two straight-shaped parts 1422, and the arc-shaped parts 1423 and the straight-shaped parts 1422 are alternately connected to form an appearance similar to a "runway-type". Referring to fig. 2 and 6, the "racetrack-type" annular protrusion 1421 is engaged with the plurality of arc-shaped grooves 104 disposed inside the housing 11, and specifically, the arc-shaped portion 1423 of the "racetrack-type" annular protrusion 1421 is engaged with the arc-shaped grooves 104 disposed inside the housing 11, and the straight portions 1422 of the "racetrack-type" annular protrusion 1421 are abutted against the groove stoppers 102 at two ends of the arc-shaped grooves 104, so as to fix the first rail member 142 to the housing 11 and prevent the first rail member 142 from moving axially and radially. In other embodiments, the "racetrack-type" annular protrusion may be replaced by a circular annular protrusion, and the circular annular protrusion may be directly clamped in the arc-shaped groove 104 without providing a stop at both ends of the arc-shaped groove 104 provided in the housing 11.

The first guide rail member 142 is disposed in the first transmission threaded sleeve 141, the first transmission threaded sleeve 141 is disposed in the housing 11, and with reference to fig. 2 and 5, the distal end 1413 of the first transmission threaded sleeve 141 abuts against the side wall of the arc-shaped protrusion 103 close to the proximal end of the two arc-shaped protrusions disposed inside the housing 11, so as to limit the position.

Referring again to fig. 6, a first groove 1424 is axially formed in the outer wall of the first rail member 142, at least a portion of the outer wall of the first rail member 142 is radially recessed toward the central axis of the first rail member 142 to form the first groove 1424, the first groove 1424 includes a first bottom portion 1426 and two first sidewalls 1427, and the first groove 1424 forms a track whose length depends on the range of bending angles of a bending position on the pipe body. In this embodiment, the first recess 1424 is linear, and in another embodiment, the first recess 1424 may also be curved from the proximal end to the distal end. In other embodiments, the first recess 1424 can also be disposed on an outer surface of the first rail member 142, the first sidewall 1427 is located on the outer surface of the first rail member 142, and the first bottom 1426 is at least a portion of the outer surface of the first rail member 142.

In this embodiment, the distal end 1425 of the first groove is located at the distal end of the first rail member 142, and the first annular convex portion 1421 and the distal end 1425 of the first groove 1424 enclose a first opening 1429, and the first opening 1429 is used for passing through the first pull wire. The contact position of the distal end 1425 of the first groove and the first traction wire can be set to be an arc structure, so that the corner of the distal end 1425 of the first groove is prevented from wearing the first traction wire, and the service life of the first traction wire is prolonged.

In one embodiment, the distal end 1425 of the first groove can be located in the middle of the first rail member 142. In one embodiment, the first opening 1429 may be disposed at any position on the first rail member 142, for example, at a position near the distal end of the first groove 1424, at a position near the proximal end of the first groove 1424, or at a proximal end of the first groove 1424, or the first opening 1429 may not be disposed on the first rail member 142, and the proximal end of the first pull wire passes through the tube wall of the tube body and directly enters the first groove to connect to the first slider.

The proximal end of the first rail member 142 is provided with a first connecting member 1428. referring to fig. 1 and 6, the first connecting member 1428 and the first rail member 142 are integrated or fixedly connected, and the first connecting member 1428 is screwed or buckled with the rear end cover 16.

Optionally, a slide way is disposed on the first groove, and the first slider slides on the slide way, in this embodiment, referring to fig. 7, the slide way is a groove slide way 14261, two groove slide ways 14261 are disposed on the first bottom 1426 of the first groove 1424, the groove slide way 14261 is parallel to the two first sidewalls 1427, and the length of the groove slide way 14261 is substantially the same as the length of the first sidewalls 1427, in other embodiments, the groove slide way 14261 may be a curved line or a broken line, the groove slide way 14261 does not need to be parallel to the two first sidewalls 1427, and the length of the groove slide way 14261 may also be different from the length of the first sidewalls 1427.

Both ends of the groove slideway 14261 are respectively provided with a slideway stopper 14262, and a surface (1436 in fig. 10) of the first slider opposite to the first bottom 1426 of the first groove 1424 is provided with a convex slider (refer to the structure of the first slider described below), and the first slider slides between the slideway stoppers 14262 of the groove slideway 14261, so that the sliding range of the first slider is controlled, and the first slider is prevented from being separated from the first groove 1424. In this embodiment, the two groove runners 14261 are respectively adjacent to the two first sidewalls 1427, in other embodiments, at least one of the two groove runners 14261 may be disposed near the middle of the first bottom 1426, or the number of the groove runners 14261 may be one, or multiple.

In another embodiment, the first side wall 1427 of the first groove 1424 is provided with a groove slide, and the surface of the first slider (see 1437 in fig. 9 or 10) opposite to the first side wall 1427 of the first groove 1424 is provided with a protrusion slider, and the protrusion slider slides in the groove slide, and both ends of the groove slide may be respectively provided with a slide stopper.

In other embodiments, the slide way may also be a raised slide way, the first slide block is provided with a slide groove in fit connection with the raised slide way, and the first slide block slides on the slide way. In other embodiments, at least two slide way stoppers are arranged at any position on the slide way, and the first slide block slides between any two slide way stoppers.

Referring to fig. 9, the first sliding block 143 is substantially cubic, and a first thread structure 1431 is provided on a first surface 1435 of the first sliding block 143, and referring to fig. 5 and 9, the first surface 1435 is disposed opposite to an inner wall of the first transmission thread bush 141, and the first thread structure 1431 of the first surface 1435 of the first sliding block 143 is engaged with a thread structure 1410 provided inside the first transmission thread bush 141.

The first slider 143 is provided with a slider, and referring to fig. 7 and 10, in this embodiment, the slider is a protrusion slider 1434, a second surface (a surface 1436 opposite to the first bottom 1426 of the first groove 1424) of the first slider 143 is provided with two protrusion sliders 1434, the two protrusion sliders 1434 are matched with two groove runners 14261 arranged in the first groove 1424, so that the first slider 143 can axially slide in the first groove 1424, and the slider 1434 and the groove runners 14261 are provided, so that the contact area between the bottom of the first slider 143 and the first groove 1424 can be reduced, friction is reduced, and operation is more convenient.

Referring to the above description of the first groove 1424 of the first rail member 142, in an embodiment, the slider includes a sliding groove, and in another embodiment, the second surface of the first slider 143 where the slider is disposed may also be a surface 1437 opposite to the first sidewall 1427 of the first groove 1424.

In fig. 10, the first slider 143 is further provided with a receiving groove 1438 and a through hole 1432, the receiving groove 1438 is communicated with the through hole 1432, and the receiving groove 1438 is provided with a fixing member, which may be a screw or a fixing member made of other materials, as long as the fixing member can be fixed in the receiving groove 1438. In this embodiment, the fixing member is a screw 1433, and one end of the first traction wire is connected to the screw 1433 after passing through the through hole 1432, so as to fix one end of the first traction wire. In an embodiment, the opening of the receiving groove 1438 may be disposed on any surface of the first slider 143 except the first surface 1435, as long as the first pull wire can be fixed. Wherein, the mode that one end of first pull wire and screw 1433 are connected is glue connection, perhaps, one end of first pull wire twines on screw 1433.

Referring to fig. 11, the first slider 143 is disposed within the first recess 1424 of the first rail member 142. When the first bending adjustment knob 12 is rotated, the first transmission threaded sleeve 141 is driven to rotate, the first sliding block 143 is driven to rotate, and because the first sliding block 143 is arranged in the first groove 1424 of the first guide rail member 142, the rotation of the first sliding block 143 is limited, the first sliding block 143 slides along the direction of the first groove 1424 of the first guide rail member 142, and cannot rotate together with the first transmission threaded sleeve 141.

It will be appreciated that in one embodiment, the handle may not include the first turning knob 12 and the first transmission screw 141, and the first slider 143 may be slid in the first groove 1424 of the first rail member 142 by other means, such as direct manual operation, so as to drive the first pull wire.

One end of the first pull wire 201 is fixedly connected to the first sliding block 143, and the other end of the first pull wire 201 extends distally along the first recess 1424, then passes through the distal end of the first recess 1424, and enters the tube body from an opening 2011 on the wall of the tube body 2, where the opening 2011 is close to the distal end of the first recess 1424. The first drawing wire 201 is driven to move along with the sliding of the first sliding block 143.

Referring to fig. 7 again, the support 19, which is engaged with the first rail member 142, includes a first catching portion 191, a first receiving portion 192, and a second catching portion 193, wherein the first catching portion 191 and the second catching portion 193 are axially connected, and the first receiving portion 192 axially penetrates through the first catching portion 191 and the second catching portion 193.

The first retaining portion 191 is an annular structure, when the support member 19 is inserted into the first guide rail member 142, the outer diameter of the first retaining portion 191 is larger than the inner diameter of the lumen structure of the first guide rail member 142, and the proximal end surface of the first retaining portion 191 abuts against the distal end surface of the "runway-type" annular protrusion 1421 at the distal opening of the first guide rail member 142. In other embodiments, the support 19 may be disposed at a proximal end portion of the first rail member 142, with the first catch 191 abutting a proximal end face of the first rail member.

The radial cross section of the first receiving portion 192 is substantially U-shaped, at least a portion of the first receiving portion 192 is disposed in the lumen structure of the first rail member 142, in this embodiment, the first receiving portion 192 includes a first portion 1921 and a second portion 1922, the first portion 1921 and the second portion 1922 are axially connected, when the support 19 is inserted into the first rail member 142, the first portion 1921 is disposed outside the lumen of the first rail member 142 due to the restriction of the first catch 191, the second portion 1922 is disposed in the lumen of the first rail member 142, and the second portion 1922 and at least a portion of the first bottom 1426 of the first groove 1424 form a channel space, an axial central axis of which is parallel to or coaxial with an axial central axis of the lumen of the first rail member 142. After the near end of the tube body passes through the channel space, the channel space can accommodate and support the tube body, and the near end of the tube body is further fixed. In other embodiments, the first catch 191 and the first receiving portion 192 are axially connected, and the first receiving portion 192 may also be entirely located within the lumen of the first rail member 142. In other embodiments, the first receiving portion 192 may be a hollow tubular structure, and the outer diameter of the tubular structure of the first receiving portion 192 is the same as the inner diameter of the tube.

Optionally, the support 19 further includes a second catch 193, the second catch 193 surrounding a portion (second portion 1922) of the first receiver 192 disposed within the lumen of the first rail member 142, the second catch 193 having an arcuate outer surface 1931, the second catch 193 entering the lumen of the first rail member 142 when the support 19 is inserted into the first rail member 142, the arcuate outer surface 1931 engaging at least a portion of an inner surface 1430 of the lumen of the first rail member 142.

When the lumen of the first rail member 142 has a larger inner diameter, the tube has a smaller diameter, and the first receiving portion 192 has a smaller outer diameter, the second catching portion 193 provides a function of supporting the first receiving portion 192 in the lumen of the first rail member 142. In one embodiment, the first receiving portion 192 and the second catching portion 193 may be integrated as a first receiving portion. When the inner diameter of the lumen of the first rail member 142 is small, the diameter of the tube body is large, and the outer diameter of the first receiving portion 192 is also large, the second retaining portion 193 may not be provided, and the outer wall of the first receiving portion 192 is directly attached to at least a part of the inner surface 1430 of the lumen of the first rail member 142. Optionally, the first rail member further includes a limiting member disposed in the first groove to cut off the length of the first groove, so as to limit the sliding distance of the first slider, thereby controlling the bending angle range of the pipe body. For example, referring to fig. 8, the limiting member is the limiting member 144, and the proximal end 1441 of the limiting member 144 abuts against the proximal end of the first recess 1424 to adjust the length of the first recess 1424, so as to control the sliding distance of the first sliding block 143. The number of the limiting blocks 144 is 1, the length of the limiting blocks 144 can be adjusted, for example, can be shortened or lengthened, and the length of the limiting blocks 144 is adjusted to match the required length of the first groove 1424; the number of the limiting blocks 144 is multiple, the length of each limiting block 144 is different, and the limiting blocks 144 with different lengths are selected to match the length of the different first grooves 1424. The limiting member may be a baffle, and two ends of the baffle may be clamped between two first sidewalls of the first groove 1424, so as to adjust a sliding distance of the first slider by adjusting a position of the baffle.

Likewise, the second bending adjustment module 15 includes a second drive threaded sleeve (not shown), a second rail member 152, and a second slide 153.

Referring to fig. 12, a "racetrack-shaped" annular protrusion 1521 is disposed at the opening of the proximal end of the second rail member 152, a second connector 1528 is disposed at the distal end of the second rail member 152, and the second connector 1528 and the second rail member 152 are integrally formed or fixedly connected.

A second groove 1524 is axially disposed on the outer wall of the second rail member 152, the second groove 1524 is disposed on the outer surface of the second rail member 152, the second groove 1524 includes a second bottom 1526 and two second side walls 1527, the second side walls 1527 are disposed on the outer surface of the second rail member 152, and the second bottom 1526 is at least a part of the outer surface of the second rail member 152. In another embodiment, at least a portion of the outer wall of the second rail member 152 may be radially recessed toward the central axis of the second rail member 152, as in the configuration of the first groove 1424 on the first rail member 142.

In this embodiment, a second opening 1529 is provided on the second rail member 152 at a location near the distal end of the second groove 1524 or at the distal end of the second groove 1524, and the second opening 1529 communicates with the lumen structure of the second rail member 152. In other embodiments, the second opening may be provided anywhere on the second track member 152 or no second opening may be provided, see in particular the first track member.

In fig. 13, one end of the second pull wire is fixedly connected to the second sliding block 153, and the other end of the second pull wire extends distally along the second groove 1524, passes through the distal end of the second groove 1524, enters the second opening 1529, and penetrates through the outer wall of the tube body 2 and enters the tube body. The proximal end of the second pull wire is moved along with the sliding of the second slider 153.

In this embodiment, a "racetrack-type" annular protrusion 1521 provided at the proximal opening of the second rail member 152 is disposed opposite the "racetrack-type" annular protrusion 1421 of the first rail member 142. A second connector 1528 disposed at the distal end of the second rail member 152 threadably or snap-fit to the front end cap 17. The proximal end of the tube body 2 is inserted into the protective sleeve 171 at the distal end of the front end cap 17, and then sequentially passes through the second rail member 152 and the first rail member 142 until it is connected to the proximal threaded connector 18, which is used to connect to the exhaust unit 18.

The length direction of the second groove 1524 and the length direction of the first groove 1424 disposed on the outer wall of the first guide rail 142 are not on the same straight line, that is, the movement track of the first slider 143 and the movement track of the second slider 153 are not on the same straight line, referring to fig. 14, in the distal direction to the proximal direction, in this embodiment, the included angle a between the perpendicular distance between the first slider 143 and the handle axis O and the perpendicular distance between the second slider 153 and the handle axis O is 90 degrees, in other embodiments, the included angle a is not equal to 0 degree, and this is set so as to avoid the first pull wire 201 and the second pull wire (connected to the second slider 153) from interfering with each other.

In this embodiment, the second turning knob 13 and the second driving thread bushing form a second rotating component, and it is understood that in other embodiments, the handle 1 may not include the second turning knob 13, that is, the second rotating component may not include the second turning knob 13, and only include the second driving thread bushing, and the second slider is made to reciprocate on the second guide rail by directly rotating the second driving thread bushing.

In the present embodiment, the second bending adjustment module 15 is the same as the first bending adjustment module 14 with respect to other structures. It will be appreciated that the structure within the housing 11 or on the first bend adjustment knob 12 in mating relationship with the first bend adjustment module 14, and correspondingly, the same structure within the housing 11 or on the second bend adjustment knob 13 in mating relationship with the second bend adjustment module 15. In other embodiments, the second bend adjustment module 15 may be identical to the first bend adjustment module 14.

In one embodiment, the tube of the bendable sheath 100 may have a plurality of bendable positions, such as 3 and 3 or more bendable positions, and the corresponding handle includes 3 and 3 or more bending adjusting modules, the 3 and 3 or more bending adjusting modules are axially disposed on the same straight line, and the proximal end of the tube sequentially passes through the 3 and 3 or more bending adjusting modules.

In an embodiment, the tube body of the bendable sheath tube 100 may be provided with only one bendable position, and the corresponding handle includes only one bending adjustment module, through which the proximal end of the tube body passes.

Referring again to fig. 1, in this embodiment, the adjustable bending sheath 100 is a double-adjustable bending sheath, and the distal end portion of the tube body comprises two bendable tube sections, a first tube section 21 and a second tube section 22, wherein a first pull wire is connected to the first tube section 21 and a second pull wire is connected to the second tube section 22. The tubular body 2 further comprises a third section 23, a fourth section 24 and a fifth section 25, which in fig. 1 are connected in the order of the fourth section 24, the second section 22, the third section 23, the first section 21 and the fifth section 25 from the distal end to the proximal end.

The hardness of the third pipe section 23 is greater than the hardness of the first pipe section 21 and the hardness of the second pipe section 22, the third pipe section 23 with the greater hardness is arranged between the two bendable pipe sections (the first pipe section 21 and the second pipe section 22), and when the second traction wire drives the second pipe section 22 to bend, the first pipe section 21 is prevented from being driven to bend, so that the second pipe section 22 is prevented from bending the first pipe section 21, and bending inaccuracy is caused.

The hardness of the fourth tube section 24 at the far end of the tube body 2 is greater than that of the second tube section 22, and when the far end of the tube body 2 is conveyed to a target position (for example, a left atrial appendage) through bending adjustment, the fourth tube section 24 at the far end of the tube body 2 is not bent under the influence of the bending of the second tube section 22, so that the far end of the tube body 2 is easier to keep coaxial with the target position, and the release is more accurate.

It can be understood that, when the tube body of the bendable sheath tube 100 is provided with only one bendable position, the tube body includes a distal end tube section, a bendable tube section and a proximal end tube section which are sequentially connected from a distal end to a proximal end, the traction wire is connected with the bendable tube section, the hardness of the distal end tube section is greater than that of the bendable tube section, and when the bendable tube section is bent, the bending of the distal end tube section cannot be driven, so that the distal end of the tube body is more easily kept coaxial with the target position, and the release is more accurate.

Referring to fig. 15 and 16, in the present embodiment, the pipe body 2 is made of a composite material, and the pipe body 2 includes an inner pipe 701, an intermediate layer and an outer pipe 703, wherein the inner pipe 701 and the outer pipe 703 are made of a polymer material, and the intermediate layer is a woven mesh pipe 702 or a spring pipe 802. The pipe body 2 is a tubular structure formed by hot melting the three-layer structure into a whole.

The inner tube 701 is made of a high-lubricity, low-friction and high-molecular material, such as Polytetrafluoroethylene (PTFE) and high-density polyethylene (HDPE), and the inner surface of the inner tube is smooth, so that other instruments can smoothly pass through the inner surface. The outer tube 703 is formed by splicing polymer materials with different hardness, such as PABAX with different hardness and Polyamide (PA) tube with different hardness.

For the intermediate layer of the woven mesh tube 702, the wires are woven using a braiding machine. In the process of manufacturing the pipe body 2, a section of woven net pipe is cut, tightened and adhered to the outer surface of the inner layer pipe 701, then the outer layer pipe 703 is sleeved on the woven net pipe, and hot melting molding is carried out to form an integral pipe cavity structure. Similarly, the spring tube 802 in the middle layer is formed by winding a spring machine for winding a spring, but the manufacturing process of the tube body 2 is the same as that of the woven mesh tube.

In this embodiment, referring again to fig. 1, the pipe body 2 may be pre-molded, and the hot-melted pipe body is placed in a molding mold to be molded into a desired pre-molded angle state, specifically, the first pipe section 21 or/and the second pipe section 22 is pre-molded into a bent state, and the first pipe section 21 or/and the second pipe section 22 is further bent within a certain arc range under the control of the handle 1. In one embodiment, the pipe body 2 may be a straight pipe.

A first fixing ring and a second fixing ring are arranged in the tube body 2, a first traction wire is connected with the first fixing ring, and the first fixing ring is arranged in the first tube section 21; the second pull wire is connected to the second retaining ring, which is arranged in the second tube section 22. The first fixing ring is sleeved on the outer surface of the middle layer of the pipe body 2 and embedded in the outer layer pipe 703 of the pipe body 2.

Referring to fig. 17, the sidewall of the first fixing ring 621 is provided with a first hole 6211, a second hole 6212 and a third hole 6213, the second hole 6212 is closer to the distal end of the first fixing ring 621 than the first hole 6211 and the third hole 6213, the proximal end of the first traction wire 201 is connected to the first slider, and the distal end of the first traction wire 201 passes through the first hole 6211, the second hole 6212 and the third hole 6213 in sequence or the third hole 6213, the second hole 6212 and the first hole 6211 in sequence, and then extends proximally along the tube body 2 to be connected to the first slider again.

Referring to fig. 18, a first line L1 exists between the center of the first hole 6211 and the center of the second hole 6212, a second line L2 exists between the center of the third hole 6213 and the center of the second hole 6212, and an included angle a1 between the first line L1 and the second line L2 is an obtuse angle. The first line L1 has an included angle a2 with the section L4 of the first traction wire 201, and the second line L2 has an included angle a3 with the section L3 of the first traction wire 201, wherein a2 and a3 are obtuse angles. So set up, can avoid the stress concentration of first traction wire to improve life.

Similarly, the sidewall of the second fixing ring is provided with a fourth hole, a fifth hole and a sixth hole, and the fifth hole is close to the distal end among the fourth hole, the fifth hole and the sixth hole, and the structure is the same as that of the first fixing ring 621, and the description thereof is omitted.

In this embodiment, the direction of the sidewall of the first fixing ring 621 provided with the first hole 6211, the second hole 6212 and the third hole 6213 and the direction of the sidewall of the second fixing ring provided with the fourth hole, the fifth hole and the sixth hole are not in the same direction, and as mentioned in connection with the handle, the length direction of the second groove 1524 and the length direction of the first groove 1424 provided on the outer wall of the first rail member 142 are not in the same line, that is, the movement track of the first slider 143 and the movement track of the second slider 153 are not in the same line, and meanwhile, the first pulling wire and the second pulling wire are parallel to each other in the tube body, and as a whole, in addition to the above description, the mutual interference of the first pulling wire and the second pulling wire can be avoided, and the bending direction of the first tube section 21 connected with the first pulling wire and the second tube section 22 connected with the second pulling wire can be different, the body of the adjustable bending sheath tube 100 can be bent in multiple directions, and the adjustable bending sheath tube is suitable for realizing accurate release under complex conditions and is convenient to operate.

It can be understood that the first fixing ring may not be provided with a hole structure, one end of the first traction wire is connected with the first sliding block, and the other end of the first traction wire passes through the first fixing ring along the inner wall of the first fixing ring, then reaches the far end of the first fixing ring, then extends along the outer wall of the first fixing ring until being connected with the first sliding block again. The second fixing ring can also be arranged in this way, and is not described in detail here.

In order to improve the fatigue life cycle of the connection of the traction wire and the fixing ring, the traction wire material made of a high-strength material can be adopted, such as carbon fiber wires, or nickel titanium (NiTi) multi-strand wires with high strength, and compared with NiTi single-root wires and NiTi multi-strand wires with the same outer diameter, the fatigue stress of the NiTi multi-strand wires is smaller, when the traction wire is connected with the fixing ring, the fatigue stress is not easy to concentrate and break, even if one wire breaks, the angles of the tube body can be adjusted by other wires, and the service life of the traction wire can be prolonged. Meanwhile, if one wire is broken, a bang early warning sound can be generated to remind an operator that the traction wire of the adjustable bent conveying sheath tube is damaged, the adjustable bent conveying sheath tube is used carefully, and the operation process is finished as soon as possible.

In this embodiment, taking the release of the left atrial appendage occluder at the left atrial appendage as an example, the operation process of the adjustable curved sheath 100 is as follows:

referring to fig. 19, amphiregulable curved sheath 100 passes through inferior vena cava 312 to right atrium 330 and passes through interatrial puncture point 323 to left atrium 350, at which time fourth tube segment 24 at the distal end of body 2 is attached to the inner wall of left atrial appendage 340, and fourth tube segment 24 is not coaxial with left atrial appendage 340, as can be seen from fig. 20, the position of fourth tube segment 24 after passing through interatrial 323 is x;

in order to adjust the coaxiality of the fourth pipe section 24 at the distal end of the pipe body 2 and the left auricle 340, the first bending adjusting knob 12 on the handle is rotated to apply force on the first traction wire 201, and the first traction wire 201 adjusts the angle of the first pipe section 21, so that the fourth pipe section 24 reaches the transverse midpoint of the left auricle 340 from the position x;

rotating a second bending adjusting knob 13 on the handle to apply a force on a second pull wire 202, wherein the second pull wire 202 adjusts the angle of the second pipe section 22 to enable a fourth pipe section 24 to reach a position z from a position y to reach the longitudinal midpoint of the left auricle 340, and accordingly, the fourth pipe section 24 at the far end of the pipe body 2 is completely coaxial with the left auricle 340, and the fourth pipe section 24 at the far end of the pipe body 2 is located at the position z;

the angle and the position of the fixed tube body 2 can be used for rapidly conveying, releasing and recovering the left auricle occluder by an operator, the operation time of the whole process is short, and the safety is high.

The adjustable bent sheath tube provided by the embodiment has the advantages that the tube body and the target lesion position are good in coaxial line, medical instruments can smoothly reach the target lesion position, the medical instruments can be firmly fixed in the target lesion area after being released, meanwhile, the dependence on the experience of operators who carry the medical instruments is effectively reduced, and the operators who are new hands can utilize the adjustable bent sheath tube to carry the medical instruments and release the medical instruments at will after simple training.

Referring to fig. 21 and 22, the present embodiment further provides a medical instrument system 1000, where the medical instrument system 1000 includes a medical instrument and a fixing plate 900 for fixing the medical instrument. In this embodiment, the medical device is an adjustable bending sheath 100. It is understood that in other embodiments, the medical device may include various delivery sheaths, implantation devices, or medical instruments, among others. It will be appreciated that the delivery sheath may include a tube and a handle, with the proximal end of the tube being connected to the handle.

In this embodiment, the fixing plate 900 includes a fixing plate body 990 and fixing members including fixing

members

901, 902, and 903. One end of the medical device (or the middle portion of the medical device) is fixed by a fixing member 901 and a fixing member 902, and the other end of the medical device (or the middle portion of the medical device) is fixed by a fixing member 903, specifically, the fixing member 901 and the fixing member 902 surround the outer surface of one end of the medical device, respectively, and the other end of the medical device passes through the fixing member 903. In other embodiments, one or more medical devices may be secured by 1 or more fasteners, and when multiple fasteners are provided, each fastener may be the same or different in construction, and may be selected and designed as desired.

Referring to fig. 23 and 24, fig. 23 shows the fastener in use and fig. 24 shows the fastener in a finished state (the outer contour of the fastener coincides with the trajectory of the fastener on the fastening plate).

Fixing element 901 is cut out along a track 904 of fixing plate 900, fixing element 901 includes a free end 908 and a connecting end 907, connecting end 907 is connected with fixing plate body 990, and free end 908 can protrude out of the plane of fixing plate body 990. Mount 902 is identical in structure to mount 901. The fixing part 901 is provided with a buckle 909, the fixing part 902 is provided with a buckle 910, and the buckle 909 and the buckle 910 can be mutually clamped and fixed. One end of the medical device is surrounded by the fixing part 901 and the fixing part 902 respectively and fixed on the outer surface of the medical device, in another embodiment, only one fixing part of the fixing part 901 and the fixing part 902 may be provided, and after the fixing part surrounds the outer surface of the medical device, the free end of the fixing part is fixed with the fixing plate body 990, and the fixing mode may be a snap mode or an adhesive mode. In this embodiment, the track 904 is in a non-closed state, and the connecting end of the fixing member 901 cut out according to the track 904 is not cut off from the fixing plate 900.

In another embodiment, in addition to the two fasteners being separately securable around the outer surface of the medical device, the medical device may be separately securable through the two fasteners. Referring to fastener 1003 and fastener 1004 in fig. 25, fastener 1003 has a connecting end 10031 and a free end 10032, and a hole 10033, and fastener 1004 has a connecting end 10041 and a free end 10042, and a hole 10043. The free end 10032 is interconnected with the free end 10042 (e.g., snapped or glued) and the medical instrument is passed through the aperture 10043 and the aperture 10033 in that order and secured. It is understood that the aperture 10043 and the aperture 10033 can be open or closed apertures, the shape of which is adapted to the shape of the medical device.

Referring to fig. 23 and 24 again, the fixing element 903 is cut out from the fixing plate 900 according to the track 9030, the fixing element 903 has a free end 9031 and a connecting end 9035, the free end 9031 can protrude out of the plane of the fixing plate body 990, and the connecting end 9035 is connected with the fixing plate body 990. The fixing element 903 is provided with a notch 9034, and after the fixing element 903 is bent along the notch 9034, the free end 9031 is connected with the fixing plate body 990. The fixing plate body 990 has an opening 9037 corresponding to the free end 9031, and the free end 9031 enters the opening 9037 and is clamped and fixed, and in other embodiments, the fixing plate body 990 may be glued. In other embodiments, a plurality of notches may be formed at different positions on the fixing member, the fixing member can be bent along the notches, and when the outer surface of the medical device is polyhedral, the bending formed by the notches can make the fixing member better fit with the outer surface of the medical device, so that the fixing member can better fix the medical device.

The fixing member 903 has a first hole 9032 and a second hole 9033, and the medical device can sequentially pass through the first hole 9032 and the second hole 9033 to fix the medical device. In other embodiments, the fixing member 903 may have only the first hole 9032, and the medical device may be fixed by passing through the first hole 9032. In fig. 24, the fixture 903 further comprises a third bore 9036, the third bore 9036 being adapted to accommodate the shape of the medical device to better secure the medical device to the fixture 903.

In fig. 24, the trace 904 includes a starting end 905 and an ending end 906, and the starting end 905 rotates outwards relative to the fixing member 901 (at this time, the outer contour of the fixing member coincides with the trace of the fixing member on the fixing plate) to form a first arc shape; the terminating end 906 is rotated outwardly relative to the fixture 901 (at which point the outer profile of the fixture coincides with the trajectory of the fixture on the fixation plate) to form a second arc. In other embodiments, referring to fig. 25, the beginning of the

fasteners

1001, 1002, 1005 and 1006 are rotated inwardly with respect to the fasteners (where the outer profile of the fasteners coincides with the trajectory of the fasteners on the fixation plate), and in particular to the fasteners 1001, the beginning 1007 and ending 1008 forming the trajectory of the fasteners 1001 are both rotated inwardly with respect to the fasteners 1001 (where the outer profile of the fasteners coincides with the trajectory of the fasteners on the fixation plate). In other embodiments, either the beginning or the ending of the trajectory forming the fixture (when the outer contour of the fixture coincides with the trajectory of the fixture on the fixation plate) is rotated inwardly with respect to the fixture, and the other is rotated outwardly with respect to the fixture (when the outer contour of the fixture coincides with the trajectory of the fixture on the fixation plate).

Through setting up curved design respectively near the initiating terminal and near the ending end, can disperse stress, avoid stress to concentrate at the junction between mounting and fixed plate, prevent effectively that the mounting that the big momentum in the twinkling of an eye in the transportation leads to from tearing for the fixed plate to avoid making the medical instrument that is fixed in on the fixed plate to appear rocking, lead to medical instrument's damage.

It will be appreciated that in securing a medical device, the beginning and ending ends of a portion of the fasteners may be provided with an arc and the beginning and ending ends of a portion of the fasteners may not be provided with an arc in the same securing plate 900.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An adjustable bending sheath tube, which comprises a tube body, a handle and a traction wire, wherein the near end of the tube body is connected with the handle, the traction wire is connected with the tube body and the handle, and the adjustable bending sheath tube is characterized in that,

2. The adjustable bend sheath of claim 1, wherein said first recess comprises a first bottom and a first sidewall, said slideway being disposed at said first bottom, said second surface of said first slider being disposed opposite said first bottom.

3. The adjustable bending sheath of claim 1, wherein the first groove comprises a first bottom and a first sidewall, the slideway is disposed on the first sidewall, and the second surface of the first slider is disposed opposite to the first sidewall.

4. The adjustable bend sheath of claim 1, wherein said slideway is a groove slideway and said sliding member is a protrusion sliding member, said groove slideway and said protrusion sliding member cooperating, said protrusion sliding member sliding on said groove slideway.

5. The adjustable bend sheath of claim 1, wherein said slideway is a raised slideway, and said sliding member comprises a sliding groove, said raised slideway and said sliding groove cooperate, and said sliding member slides on said raised slideway.

6. The adjustable bending sheath according to claim 1, wherein the first slider is provided with a receiving groove and a through hole, the receiving groove is communicated with the through hole, a fixing member is provided in the receiving groove, and one end of the first pulling wire penetrates through the through hole and is connected to the fixing member, and one end of the first pulling wire is fixed by the fixing member.

7. The adjustable bending sheath of claim 6, wherein one end of the first pull wire is connected to the fixing member by glue.

8. The adjustable bend sheath of claim 6, wherein an end of said first pull wire is wrapped around said anchor.

9. The adjustable bending sheath of claim 1, wherein two slide stops are provided on the slide, and the slider slides between the two slide stops.