CN115779232A - Adjustable Curved Sheath - Google Patents

Abstract

The invention relates to an adjustable curved sheath tube, which includes a tube body, a handle and a pulling wire. The handle includes a first rail piece, a second rail piece, a first slide block and a second slide block. The proximal end of the second guide rail is oppositely arranged, and the proximal end of the pipe body passes through any one of the first guide rail and the second guide rail in turn, and then passes through the first guide rail and the second guide rail. In another, the first slider reciprocates on the first guide rail, and the second slider reciprocates on the second guide rail; the pipe body includes the first pipe section, the second pipe section and the third pipe section, and the two ends of the third pipe section The first pipe section and the second pipe section are respectively connected, and the hardness of the third pipe section is greater than that of the first pipe section and the hardness of the second pipe section, so that the double-adjustable bending operation of the distal end of the pipe body is realized, and the operation is convenient and the release is accurate.

Description

adjustable curved sheath

technical field

The invention relates to the field of medical instruments, in particular to an adjustable curved sheath tube.

Background technique

Medical sheaths have been widely used in minimally invasive interventional diagnostic and therapeutic operations to establish channels, transport or retrieve instruments, inject drugs, or export body fluids. Among them, the adjustable curved sheath has the function of adjustable distal end, which can reach the target lesion quickly and reliably, so as to reduce the operation time. The adjustable curved sheath for transporting medical devices in the market has a monotonically curved distal sheath head, and the position of the distal sheath head can be adjusted through the free bending of the distal end.

However, the anatomical structure of the human body is quite different, and the sheath delivery device through the monotonously curved distal sheath head cannot completely solve specific cases, and it is easy to cause the medical device to fail to reach the target lesion, or the medical device to reach the target lesion, but release The failure of the medical device causes the device to fall off, causing serious personal injury to the patient.

Contents of the invention

Based on this, it is necessary to provide an adjustable bending sheath, which can realize the double-bending operation of the distal end of the tube body, and is convenient in operation and accurate in release.

An adjustable curved sheath tube, comprising a tube body, a handle and a pulling wire, the proximal end of the tube body is connected to the handle, and the pulling wire connects the tube body and the handle,

The handle includes a first rail piece, a second rail piece, a first slider and a second slider, the far end of the first rail piece is opposite to the proximal end of the second rail piece, and the tubular body The proximal end passes through any one of the first rail part and the second rail part in turn, and then passes through the other of the first rail part and the second rail part, so The first slider reciprocates on the first guide rail, and the second slider reciprocates on the second guide rail;

The pipe body includes a first pipe section, a second pipe section and a third pipe section, both ends of the third pipe section are respectively connected to the first pipe section and the second pipe section, and the hardness of the third pipe section is greater than that of the first pipe section. the hardness of a pipe section and the hardness of said second pipe section;

The pulling wire includes a first pulling wire and a second pulling wire, the first pulling wire connects the first pipe section and the first slider, and the second pulling wire connects the second pipe section and the The second slider, the reciprocating movement of the first slider drives the bending and straightening movement of the first pipe section, and the reciprocating movement of the second slider drives the bending and straightening movement of the second pipe section .

Further, the handle also includes a housing, a first rotating assembly and a second rotating assembly, the first rotating assembly is rotatably connected to the housing, and the first slider is arranged on the first rotating assembly. In the component and the inner wall of the first rotary component is screwed with the first slider, the second rotary component is also rotatably connected with the housing, and the second slider is arranged on the second rotary The inner wall of the second rotating assembly is threadedly connected with the second sliding block.

Further, the first rotating assembly includes a first driving screw sleeve and a first bending adjustment knob, the first driving screw sleeve is arranged in the housing, and the first driving screw sleeve is connected to the first adjustment knob. The curved knob rotates synchronously, the first slider is arranged in the first transmission threaded sleeve and the inner wall of the first transmission threaded sleeve is threadedly connected with the first slider; the second rotating assembly includes a second Two transmission threaded sleeves and a second bending adjustment knob, the second transmission threaded sleeve is arranged in the housing and the second transmission threaded sleeve rotates synchronously with the second bending adjustment knob, and the second slider is set The inner wall of the second driving thread sleeve is in the second driving thread sleeve and is threadedly connected with the second sliding block.

Further, the outer wall of the first rail member is provided with a first groove in the axial direction, the first groove includes a first bottom and a first side wall, and the first slider is positioned in the first groove. slides inside along the first side wall,

At least part of the outer wall of the first rail member is radially recessed toward the central axis of the first rail member to form the first groove, or,

The first bottom of the first groove is at least part of the outer surface of the first rail member, and the first side wall is located on the outer surface of the first rail member;

The outer wall of the second rail member is provided with a second groove in the axial direction, the second groove includes a second bottom and a second side wall, and the second slider moves along the second groove in the second groove. The second side wall slides,

At least part of the outer wall of the second rail member is radially recessed toward the central axis of the second rail member, or,

The second bottom of the second groove is at least part of the outer surface of the second rail member, and the second side wall is located on the outer surface of the second rail member.

Further, the length direction of the first groove and the length direction of the second groove are not on a straight line.

Further, the first guide rail part and the second guide rail part are respectively provided with a clamping structure, and the clamping structure and the housing are clamped and abutted against each other.

Further, the first guide rail part and the second guide rail part have a lumen structure,

The proximal end of the first pulling wire passes through the side wall of the tubular body, enters the first groove and connects with the first slider, or,

There is a first opening on the first rail member, the proximal end of the first pulling wire passes through the first opening, enters the first groove and connects with the first slider;

The proximal end of the second pulling wire passes through the side wall of the tubular body, enters the second groove and connects with the second slider, or,

The second rail member has a second opening, and the proximal end of the first pulling wire passes through the second opening and enters the second groove to connect with the second sliding block.

Further, the handle also includes a front end cover and a rear end cover, a first connecting piece is provided at the proximal end of the first guide rail, and the first connecting piece is integrally structured or fixedly connected with the first guide rail , the first connecting piece is screwed or buckled to the rear end cover; the distal end of the second guide rail is provided with a second connecting piece, and the second connecting piece is integrated with the second guide rail structural or fixed connection, and the second connecting member is screwed or buckled connected to the front end cover.

Further, a horn-shaped protective sleeve is connected to the distal end of the front cover, and the material of the protective sleeve is selected from silica gel or rubber.

Further, the pipe body also includes a fourth pipe section, the fourth pipe section is located at the far end of the pipe body, the proximal end of the fourth pipe section is connected to the second pipe section, and the hardness of the fourth pipe section is greater than the hardness of the second pipe section.

The above-mentioned adjustable curved sheath is provided with the interaction between the first guide rail, the first slider and the first drawing wire, and the interaction between the second guide rail, the second slider and the second drawing wire, In this way, at least two positions of the tubular body part of the adjustable bending sheath can be controlled to adjust the bending; by setting the proximal end of the tubular body to pass through any one of the first guide rail part and the second guide rail part in sequence, and then pass through the second guide rail part The other of the first guide rail and the second guide rail makes the whole device more compact; by setting the two ends of the third pipe section to connect the first pipe section and the second pipe section respectively, the hardness of the third pipe section is greater than that of the first pipe section The hardness of the second pipe section can prevent the bending process of the first pipe section and the second pipe section from interfering with each other, and can achieve precise control and precise release.

Description of drawings

Fig. 1 is a schematic diagram of an adjustable curved sheath provided by an embodiment.

Fig. 2 is a partial schematic diagram of an outer shell of an adjustable curved sheath provided by an embodiment.

Fig. 3 is a schematic diagram of a first bending adjustment knob of an adjustable bending sheath provided by an embodiment.

Fig. 4 is a partial schematic diagram of an adjustable curved sheath provided by an embodiment.

Fig. 5 is a schematic diagram of the first driving screw sleeve of the adjustable curved sheath provided by an embodiment.

Fig. 6 is a schematic diagram of the first rail member of the adjustable curved sheath provided by an embodiment.

Fig. 7 is a schematic diagram of a first rail member and a support member of an adjustable curved sheath provided by an embodiment.

Fig. 8 is a schematic diagram of a first rail member, a first slider and a stopper of an adjustable curved sheath provided by an embodiment.

Fig. 9 is a schematic diagram of the first slider of the adjustable curved sheath provided by an embodiment.

Fig. 10 is a schematic diagram of another viewing angle of the first slider of the adjustable curved sheath provided by an embodiment.

Fig. 11 is a schematic diagram of cooperation between the first rail part, the first slider and the tube body of the adjustable curved sheath provided by an embodiment.

Fig. 12 is a schematic diagram of the second rail member of the adjustable curved sheath provided by an embodiment.

Fig. 13 is another partial schematic view of the adjustable curved sheath provided by an embodiment.

FIG. 14 is a schematic view of FIG. 13 viewed from the distal end to the proximal end direction.

Fig. 15 is an enlarged structural view of part of the tube body of the adjustable curved sheath provided by an embodiment.

Fig. 16 is an enlarged structural view of part of the tube body of the adjustable curved sheath provided in yet another embodiment.

Fig. 17 is a schematic diagram of the connection between the first traction guide wire and the first fixing ring provided by an embodiment.

FIG. 18 is a schematic diagram of another angle of FIG. 17 .

Fig. 19 is a schematic diagram of the operation of entering the heart with the adjustable curved sheath provided by an embodiment.

Fig. 20 is a sectional view of A-A in Fig. 19 .

Figure 21 is a schematic diagram of a medical device system in one embodiment.

FIG. 22 is a schematic diagram of another angle of FIG. 21 .

Fig. 23 is a schematic diagram of the fixing plate when the fixing member is in use in an embodiment.

Fig. 24 is a schematic diagram of the fixing plate in an embodiment when the fixing piece is in a completed state (the outer contour of the fixing piece coincides with the track of the fixing piece on the fixing plate).

Fig. 25 is a schematic diagram of the fixing plate when the fixing piece is in a completed state (the outer contour of the fixing piece coincides with the track of the fixing piece on the fixing plate) in another embodiment.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific implementations disclosed below.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

First of all, it needs to be emphasized here that the "near end" mentioned in the embodiments of the present invention refers to the end close to the operator during the operation; the "far end" refers to the end far away from the operator during the operation; "Axial" refers to the direction parallel to the line connecting the center of the distal end and the center of the proximal end of the medical device; "radial" refers to the direction perpendicular to the axial direction.

Referring to FIG. 1 , this embodiment provides an adjustable curved sheath tube 100 , which includes a handle 1 and a tube body 2 , the proximal end of the tube body 2 is connected to the handle 1 . In this embodiment, the adjustable bend sheath 100 is a double adjustable bend sheath, that is, the tube body 2 includes two bendable positions.

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

The far end of the front end cover 17 is connected with a trumpet-shaped protective sleeve 171, the material of which is selected from silica gel or rubber, and the proximal end of the tube body 2 penetrates from the proximal end of the protective sleeve 171, and the protective sleeve 171 is used to avoid The portion of the tube body 2 that is in contact with the protective cover 171 is broken due to an excessively large bending angle.

In this embodiment, the first bending knob 12 and the second bending knob 13 rotate relative to the housing 11 respectively, and the operator can hold the housing 11 and hold the first bending knob 12 directly with the thumb and forefinger Or the second bending knob 13 is rotated to make the operation more convenient.

The first bend adjustment knob 12 and/or the second bend adjustment knob 13 and the housing 11 need not be directly opposed to each other, and can be arranged between the first bend adjustment knob 12 and/or the second bend adjustment knob 13 and the housing 11. Ring piece 111, the ring piece 111 is fixedly connected with the shell 11, the first bending adjustment knob 12 or the second bending adjustment knob 13 is against the ring piece 111, and can realize the first bending adjustment knob 12 or the second bending adjustment knob 13 Rotate relative to the ring 111. The way of fixed connection can be snap connection or glue fixing. The purpose of adding the ring piece 111 is to extend the size of the handle 1 and at the same time play a decorative role.

In other embodiments, the first bending knob 12 and/or the second bending 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 parts, the first bending knob 12 and the second bending knob The two bending knobs 13 respectively abut against the adjacent shell parts and can realize relative rotation.

Wherein, the housing 11 is roughly cylindrical in shape, the middle part of the outer wall of the housing 11 is sunken inward, and the outer diameter of the middle part of the outer wall of the housing 11 is smaller than the outer diameters of both ends of the outer wall of the housing 11, which is convenient for the operator to hold. Optionally, anti-skid lines 110 may be provided on the outer wall of the housing 11 to facilitate operation.

In Fig. 2, the interior of the housing 11 is provided with multiple groups of arc-shaped protrusions, each group of arc-shaped protrusions includes two adjacent arc-shaped protrusions 101, 103, and the adjacent two arc-shaped protrusions 101 An arc-shaped groove 104 is formed between , 103 , and two groove stops 102 are provided at both ends of the arc-shaped groove 104 . In this embodiment, in order to facilitate processing and assembly, the shell 11 can be designed in half from the middle, that is, the shell includes a first shell and a second shell, and a plurality of buckle structures are provided at the connection between the first shell and the second shell , the first shell and the second shell form a column-shaped shell by fastening each other. The first shell and the second shell can also be integrally formed.

Referring to Fig. 3, the first bending knob 12 has a ring structure, and the diameter of the distal opening of each ring structure and the diameter of the proximal opening of the ring structure can be the same or different, and can be designed according to the shape of the handle . Anti-slip elements 120 are provided on the outer wall of the first bending adjustment knob, such as stripe structure, thread structure, bump structure and the like. The inner wall of the first bending adjustment knob 12 is provided with a locking groove structure 121 . The structure of the second bending knob 13 is the same as that of the first bending knob 12 , and the size of the second bending knob 13 and the first bending knob 12 may be the same or different.

Referring to FIG. 4 , the handle 1 further includes a first bend adjustment module 14 and a second bend adjustment module 15 . Wherein, the distal end of the first bending adjustment module 14 is opposite to the proximal end of the second bending adjustment module 15 . The first bending adjustment module 14 is disposed in the housing 11 and the first bending adjustment knob 12 , and the second bending adjustment module 15 is disposed in the housing 11 and the second bending adjustment knob 13 .

Referring to FIG. 5 , FIG. 6 and FIG. 7 , the first bending adjustment module 14 includes a first driving screw sleeve 141 , a first rail member 142 and a first sliding block 143 . Wherein the first slider 143 is slidably disposed on the first rail member 142 , and the first driving threaded sleeve 141 is sleeved on the first rail member 142 and the first slider 143 .

Referring to FIG. 5 , the first driving threaded sleeve 141 is cylindrical. In order to facilitate processing and assembly, the first driving threaded sleeve 141 , like the shell 11 , can be designed in half from the middle, or integrally formed. The inner wall of the first transmission threaded sleeve 141 is provided with a threaded structure 1410, and the outer wall of the first transmission threaded sleeve 141 is provided with a bump structure 1411. With reference to Figures 3 and 5, the bump structure 1411 is compatible with the first bending adjustment The locking groove structures 121 on the inner wall of the knob 12 cooperate with each other to realize the fixed connection between the first driving threaded sleeve 141 and the first bending adjustment knob 12 . It can be understood that, in an embodiment, the outer wall of the proximal end of the first driving threaded sleeve 141 may be provided with a slot structure, and the inner wall of the first bending adjustment knob 12 may be provided with a protrusion structure, and the slot structure is compatible with The bump structures cooperate with each other. In one embodiment, the first bending adjustment knob 12 is directly connected to the first driving threaded sleeve 141 by glue. In this embodiment, the protrusion structure 1411 on the outer wall of the first driving thread sleeve 141 is located at the proximal end of the first driving thread sleeve 141. In other embodiments, the protrusion structure 1411 can also be located at the first driving thread sleeve. 141 , the position of the protrusion structure 1411 is mainly set according to the position of the first bending knob 12 . In this embodiment, an annular protrusion 1412 is also provided on the outer wall of the first driving threaded sleeve 141. It can be understood that a groove structure that cooperates with the annular protrusion 1412 is provided on the inner wall of the housing 11, so as to avoid The first driving threaded sleeve 141 moves axially in the casing 11 , but the first driving threaded sleeve 141 can be allowed to rotate relative to the casing.

In this embodiment, the first bending adjustment knob 12 and the first transmission threaded sleeve 141 form a first rotating assembly. It can be understood that in other embodiments, the handle 1 may not include the first bending adjustment knob 12, or That is, the first rotating assembly may not include the first bending adjustment knob 12, but only include the first driving threaded sleeve 141, and by directly rotating the first driving threaded sleeve 141, the first slider can reciprocate on the first guide rail sports.

The distal end or the proximal end of the first guide rail is provided with a clamping structure, and the clamping structure and the housing are clamped and abutted against each other to prevent the first guide rail from moving axially and radially. Specifically, referring to FIG. 6 , the first rail member 142 has a lumen structure, and the distal opening of the first rail member 142 is provided with a clamping structure, which is a “racetrack-shaped” annular raised portion 1421 The outer periphery of the "racetrack-shaped" annular raised portion 1421 includes two sections of arcs 1423 and two sections of straight lines 1422, the arcs 1423 and straight sections 1422 are alternately connected to form a similar "racetrack" shape. 2 and 6, the "racetrack-shaped" annular raised portion 1421 cooperates with a plurality of arc-shaped grooves 104 provided inside the housing 11, specifically, the "racetrack-shaped" annular raised portion 1421 The arc portion 1423 is stuck in the arc groove 104 provided inside the housing 11, and the straight portion 1422 of the “racetrack-shaped” annular raised portion 1421 abuts against the groove stoppers 102 at both ends of the arc groove 104, It is used 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-shaped" annular raised portion can be replaced with a circular annular raised portion, and the two ends of the arc-shaped groove 104 provided inside the housing 11 can also be directly placed without a stopper. The circular ring-shaped raised part is locked in the arc-shaped groove 104 .

The first rail member 142 is arranged in the first transmission threaded sleeve 141, and the first transmission threaded sleeve 141 is arranged in the housing 11. Referring to FIG. 2 and FIG. Among the two arc-shaped protrusions, the side wall of the arc-shaped protrusion 103 close to the proximal end is opposed to play a position-limiting role.

Referring again to FIG. 6 , the outer wall of the first rail member 142 is axially provided with a first groove 1424 , and at least part 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. Groove 1424, this first groove 1424 comprises first bottom 1426 and two first side walls 1427, this first groove 1424 forms a track, the length of this track depends on the scope of the bending angle of a bending position on the pipe body . In this embodiment, the first groove 1424 is linear, and in another embodiment, the first groove 1424 may also be arc-shaped extending from the proximal end to the distal end. In other embodiments, the first groove 1424 can also be arranged on the outer surface of the first rail member 142, the first side wall 1427 is located on the outer surface of the first rail member 142, and the first bottom 1426 is the first rail member At least part of the outer surface of 142.

In this embodiment, the distal end 1425 of the first groove is located at the distal end of the first rail member 142 , the first annular protrusion 1421 and the distal end 1425 of the first groove 1424 enclose a first opening 1429 , The first opening 1429 is used for passing the first pulling wire. The position where the distal end 1425 of the first groove is in contact with the first pulling wire can be set in an arc-shaped structure, thereby avoiding the corners of the distal end 1425 of the first groove from wearing the first pulling wire and prolonging the use of the first pulling wire life.

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 can be provided at any position on the first rail member 142, for example, the position near the distal end of the first groove 1424, the distal end of the first groove 1424, the first groove 1424 or the proximal end of the first groove 1424, or the first opening 1429 may not be set on the first rail member 142, and the proximal end of the first pulling wire passes through the tube wall of the tube body, directly Enter the first groove and connect with the first slider.

The proximal end of the first rail member 142 is provided with a first connecting piece 1428. Referring to FIG. 1 and FIG. Buckle connects rear end cover 16.

Optionally, a slideway is provided on the first groove, and the first slider slides on the slideway. In this embodiment, referring to FIG. 7, the slideway is a groove slideway 14261, and the first groove 1424 Two groove slides 14261 are arranged on the first bottom 1426, the groove slides 14261 are parallel to the two first side walls 1427, and the length of the groove slides 14261 is the same as the length of the first side walls 1427 The lengths are approximately the same. In other embodiments, the grooved slideway 14261 can be curved or broken line. The grooved slideway 14261 and the two first side walls 1427 do not need to be parallel to each other. The grooved slideway 14261 The length of and the length of the first side wall 1427 may also be different.

Both ends of the groove slideway 14261 are provided with slideway stoppers 14262 respectively, and the surface (1436 in FIG. 10 ) opposite to the first bottom 1426 of the first groove 1424 on the first slider is provided with a raised sliding part ( Specifically refer to the structure of the first slider below), the first slider slides between the slideway stoppers 14262 of the groove slideway 14261, thereby controlling the sliding range of the first slider and preventing the first slider from breaking away from the first slider. groove 1424 . In this embodiment, the two grooved slideways 14261 are respectively close to the two first side walls 1427. In other embodiments, at least any one of the two grooved slideways 14261 can be arranged on the first bottom The position near the middle of 1426, or the number of groove slideways 14261 can be one or more.

In another embodiment, the first side wall 1427 of the first groove 1424 is provided with a groove slideway, and the surface opposite to the first side wall 1427 of the first groove 1424 on the first slider (see FIG. 9 or 1437 in FIG. 10) is provided with a protruding sliding part, and the protruding sliding part slides in the groove slideway, and the two ends of the groove slideway can be respectively provided with slideway stoppers.

In other embodiments, the sliding track can also be a raised sliding track, the first sliding block is provided with a sliding groove matched with the raised sliding track, and the first sliding block slides on the sliding track. In other embodiments, at least two slideway stoppers are arranged at any position on the slideway, and the first slideway slides between any two slideway stoppers.

Referring to Fig. 9, the first slider 143 is roughly in the shape of a cube, and the first surface 1435 of the first slider 143 is provided with a first thread structure 1431. With reference to Figs. The inner walls of the threaded sleeve 141 are oppositely disposed, and the first threaded structure 1431 of the first surface 1435 of the first sliding block 143 cooperates with the internally provided threaded structure 1410 of the first driving threaded sleeve 141 .

The first sliding block 143 is provided with a sliding part. With reference to FIGS. The opposite surface 1436 of the first bottom 1426 of 1424 is provided with two protruding sliders 1434, and the two protruding sliders 1434 cooperate with the two groove slides 14261 provided in the first groove 1424, so that the second A slider 143 can slide axially in the first groove 1424, and the sliding member 1434 and the groove slideway 14261 are provided, which can reduce the contact area between the bottom of the first slider 143 and the first groove 1424, reduce friction, and more Easy to operate.

Referring to the above description of the first groove 1424 of the first rail member 142, in one embodiment, the slider includes a sliding groove, and in another embodiment, the second surface of the first slider 143 of the slider is provided It may also be a surface 1437 opposite to the first side wall 1427 of the first groove 1424 .

In Fig. 10, the first slider 143 is also provided with a receiving groove 1438 and a through hole 1432, the receiving groove 1438 communicates with the through hole 1432, and a fixing member is arranged in the receiving groove 1438, and the fixing member can be a screw Or other fixing parts, as long as they can be fixed in the accommodating groove 1438 . In this embodiment, the fixing member is a screw 1433, and one end of the first pulling wire passes through the through hole 1432 and is connected with the screw 1433, thereby fixing one end of the first pulling wire. In an embodiment, the opening of the accommodating groove 1438 can be disposed on any surface of the first slider 143 except the first surface 1435 , as long as the first pulling wire can be fixed. Wherein, one end of the first drawing wire is connected to the screw 1433 by glue, or one end of the first drawing wire is wound on the screw 1433 .

Referring to FIG. 11 , the first sliding block 143 is disposed in the first groove 1424 of the first rail member 142 . When the first bending knob 12 is turned, the first transmission threaded sleeve 141 is driven to rotate, and the first slider 143 is driven to rotate. Since the first slider 143 is arranged in the first groove 1424 of the first rail member 142, the The rotation of a sliding block 143 is restricted, therefore, the first sliding block 143 slides along the direction of the first groove 1424 of the first rail member 142 and cannot rotate together with the first driving threaded sleeve 141 .

It can be understood that, in an embodiment, the handle may not include the first bending knob 12 and the first driving threaded sleeve 141, and other methods, such as directly manually operating the first slider 143 on the first side of the first guide rail 142 Sliding in the groove 1424, so as to drive the movement of the first pulling wire.

One end of the first pulling wire 201 is fixedly connected to the first slider 143, and the other end of the first pulling wire 201 extends distally along the first groove 1424, and then passes through the distal end of the first groove 1424, from The opening 2011 of the tube wall of the tube body 2 enters into the tube body, and the opening 2011 is close to the distal end of the first groove 1424 . As the first slider 143 slides, the first drawing wire 201 is driven to move.

Referring again to FIG. 7 , the supporting member 19 cooperating with the first rail member 142 includes a first clamping portion 191 , a first receiving portion 192 and a second clamping portion 193 , wherein the first clamping portion 191 and the second clamping portion 191 The clamping portion 193 is axially connected, and the first receiving portion 192 axially passes through the first clamping portion 191 and the second clamping portion 193 .

The first clamping portion 191 has an annular structure. When the support member 19 is inserted into the first rail member 142, the outer diameter of the first clamping portion 191 is larger than the inner diameter of the lumen structure of the first rail member 142, and the first clamping portion 191 The proximal end surface of the first rail member 142 abuts against the distal end surface of the “racetrack-shaped” annular raised portion 1421 at the distal opening of the first rail member 142 . In other embodiments, the support member 19 may be disposed at the proximal end of the first guide rail member 142 , and the first clamping portion 191 abuts against the proximal end surface of the first guide rail member.

The radial section of the first receiving portion 192 is substantially U-shaped, and at least a part 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 the second part 1922, the first part 1921 and the second part 1922 are axially connected, when the support member 19 is inserted into the first rail member 142, due to the restriction of the first clamping part 191, the first part 1921 is set on the first rail Outside the lumen of the member 142, the second part 1922 is disposed in the lumen of the first rail member 142, the second part 1922 and at least part of the first bottom 1426 of the first groove 1424 form a channel space, the channel space The axial central axis is parallel to or coaxial with the axial central axis of the lumen of the first rail member 142 . After the proximal end of the tubular body passes through the channel space, the channel space can accommodate and support the tubular body, further fixing the proximal end of the tubular body. In other embodiments, the first clamping portion 191 is axially connected to the first receiving portion 192 , and the first receiving portion 192 may also be entirely located in 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 tubular body.

Optionally, the support member 19 further includes a second clamping portion 193, the second clamping portion 193 wraps the part of the first receiving portion 192 (the second portion 1922) disposed in the lumen of the first rail member 142 , the second clamping portion 193 has an arc-shaped outer surface 1931, when the support member 19 is inserted into the first guide rail member 142, the second clamping portion 193 enters the lumen of the first guide rail member 142, and the arc-shaped outer surface 1931 It fits with at least a partial area of the inner surface 1430 of the lumen of the first rail member 142 .

When the inner diameter of the lumen of the first rail member 142 is larger, the diameter of the tubular body is smaller, and the outer diameter of the first receiving portion 192 is also smaller, the second clamping portion 193 provides support in the lumen of the first rail member 142 Functions of the first housing part 192 . In an embodiment, the first receiving portion 192 and the second locking 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 tubular body is large, and the outer diameter of the first receiving portion 192 is also large, the second clamping portion 193 may not be provided, and the outer wall of the first receiving portion 192 It is directly attached to at least a partial area of the inner surface 1430 of the lumen of the first rail member 142 . Optionally, the first rail member further includes a limiter, which is set 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 of the pipe body scope. For example, referring to Fig. 8, the stopper is a stopper 144, and the proximal end 1441 of the stopper 144 is against the proximal end of the first groove 1424 to adjust the length of the first groove 1424, thereby controlling the first slider 143 swipe distance. Wherein, the quantity of the limit block 144 is 1, and the length of the limit block 144 can be adjusted, for example, can be shortened or extended, by adjusting the length of the limit block 144, to match the length of the first groove 1424 required; There are multiple positioning blocks 144 , each of which has a different length, and the positioning blocks 144 of different lengths are selected to match different lengths of the first grooves 1424 . The limiting member can be a baffle, and the two ends of the baffle can be clamped between the two first side walls of the first groove 1424, and the sliding distance of the first slider can be adjusted by adjusting the position of the baffle.

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

12, the proximal opening of the second rail member 152 is provided with a "racetrack-shaped" annular raised portion 1521, and the distal end of the second rail member 152 is provided with a second connecting member 1528, and the second connecting member 1528 and The second rail member 152 is an integral structure or fixedly connected.

The axial direction of the outer wall of the second rail member 152 is provided with a second groove 1524, and the second groove 1524 is arranged on the outer surface of the second rail member 152, and the second groove 1524 includes a second bottom 1526 and two second grooves. Two sidewalls 1527 , the second sidewall 1527 is located on the outer surface of the second rail member 152 , and the second bottom 1526 is at least part of the outer surface of the second rail member 152 . In another embodiment, like the structure of the first groove 1424 on the first rail part 142 , at least part of the outer wall of the second rail part 152 can be radially recessed toward the central axis of the second rail part 152 .

In this embodiment, a second opening 1529 is provided on the second rail member 152 near the distal end of the second groove 1524 or at the distal end of the second groove 1524, and the second opening 1529 is connected to the second rail member 152. The luminal structure communicates. In other embodiments, the second opening may be disposed at any position on the second guide rail 152 or no second opening is provided, please refer to the first guide rail for details.

In FIG. 13 , one end of the second pulling wire is fixedly connected to the second slider 153 , and the other end of the second pulling wire extends distally along the second groove 1524 , passing through the distal end of the second groove 1524 , enter the second opening 1529, penetrate the outer wall of the tube body 2 and enter the tube body. With the sliding of the second sliding block 153, the proximal end of the second pulling wire is driven to move.

In this embodiment, the “racetrack-shaped” annular protruding portion 1521 provided at the proximal opening of the second guide rail member 152 is opposite to the “racetrack-shaped” annular protruding portion 1421 of the first guide rail member 142 . The second connecting member 1528 disposed at the distal end of the second rail member 152 is screwed or buckled to the front end cover 17 . The proximal end of the tube body 2 penetrates through the protective sleeve 171 at the distal end of the front end cover 17, then passes through the second rail member 152 and the first rail member 142 in turn, until it is connected to the threaded connector 18 at the proximal end, the threaded connector 18 is used to connect the exhaust device.

The length direction of the second groove 1524 is not on a straight line with the length direction of the first groove 1424 provided on the outer wall of the first rail member 142, that is, the movement track of the first slider 143 and the movement track of the second slider 153 The motion trajectory is not on a straight line. Referring to FIG. 14, in the direction from the distal end to the proximal end, in this embodiment, the vertical distance between the first slider 143 and the handle axis O and the distance between the second slider 153 and the handle axis O The included angle a between the vertical distances is 90 degrees. In other embodiments, the included angle a is not equal to 0 degrees. The purpose of this setting is to avoid the first drawing wire 201 and the second drawing wire (with the second slider) 153 connections) interfere with each other.

In this embodiment, the second bending adjustment knob 13 and the second transmission threaded sleeve form a second rotating assembly. It can be understood that in other embodiments, the handle 1 may not include the second bending adjustment knob 13, that is, The second rotating assembly may not include the second bending adjustment knob 13, but only the second driving threaded sleeve. By directly rotating the second driving threaded sleeve, the second sliding block reciprocates on the second guide rail.

In this embodiment, regarding other structures, the second bend adjustment module 15 is the same as the first bend adjustment module 14 . It can be understood that the structure in the housing 11 or the structure on the first bending adjustment knob 12 that has a cooperative relationship with the first bending adjustment module 14, correspondingly, the structure in the housing 11 that has a cooperative relationship with the second bending adjustment module 15 or All have the same structure on the second bending knob 13 . In other embodiments, the second bend adjustment module 15 and the first bend adjustment module 14 may be identical.

In one embodiment, the tube body of the adjustable bendable sheath 100 can have multiple bendable positions, for example, 3 or more bendable positions, and the corresponding handle includes 3 or more bend adjustment modules, The three or more bending adjustment modules are axially placed on the same straight line, and the proximal end of the pipe body passes through the three or more bending adjustment modules in sequence.

In an embodiment, the tube body of the adjustable bend sheath 100 can only be set at one bendable position, and the corresponding handle only includes one bend adjustment module, and the proximal end of the tube body passes through the bend adjustment module.

Referring again to FIG. 1 , in this embodiment, the adjustable bend sheath 100 is a double adjustable bend sheath, and the distal part of the tube body includes two bendable tube sections, respectively a first tube section 21 and a second tube section 22 , wherein the first drawing wire is connected to the first pipe section 21 , and the second drawing wire is connected to the second pipe section 22 . The tubular body 2 also includes a third tube section 23, a fourth tube section 24 and a fifth tube section 25. In FIG. A pipe section 21 and a fifth pipe section 25.

Wherein, 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, and the third pipe section 23 with higher hardness is arranged on two bendable pipe sections (the first pipe section 21 and the second pipe section 22) In between, when the second drawing wire drives the second pipe section 22 to bend, it can avoid driving the first pipe section 21 to bend, thereby avoiding the influence of the second pipe section 22 on the bending adjustment of the first pipe section 21, resulting in inaccurate bending adjustment.

The hardness of the fourth tube segment 24 located at the distal end of the tube body 2 is greater than that of the second tube segment 22. When the distal end of the tube body 2 is sent to the target position (for example, the left auricle) by bending, the tube body 2 is located at the far end of the tube body 2. The fourth tube segment 24 at the distal end will not be bent due to the bending of the second tube segment 22 , and it is easier to keep the distal end of the tube body 2 coaxial with the target position, thereby achieving more accurate release.

It can be understood that when the tube body of the adjustable bendable sheath tube 100 is provided with only one bendable position, the tube body includes a distal tube section, a bendable tube section and a proximal tube section which are sequentially connected from the distal end to the proximal end, and the pulling wire and the flexible Bending pipe section connection, the hardness of the distal pipe section is greater than that of the bendable pipe section. When the bendable pipe section is bent, it will not drive the bending of the distal pipe section, so it is easier to keep the distal end of the pipe body coaxial with the target position and achieve more accurate release. .

Referring to Fig. 15 and Fig. 16, in this embodiment, the pipe body 2 is made of composite material, and the pipe body 2 includes an inner layer pipe 701, an intermediate layer and an outer layer pipe 703, wherein the inner layer pipe 701 and the outer layer pipe 703 is a tube body of polymer material, and the middle layer is braided net tube 702 or spring tube 802 . The pipe body 2 is a tubular structure in which the three-layer structure is melt-molded into one.

The inner tube 701 is made of high-lubricity and low-friction polymer materials, such as polytetrafluoroethylene (PTFE) and high-density polyethylene (HDPE), and its inner surface is smooth, which can ensure that other instruments can pass through the inner surface smoothly. The outer tube 703 is spliced by polymer materials with different hardness, such as PABAX with different hardness and polyamide (PA) tube with different hardness.

For the braided mesh tube 702 in the middle layer, the metal wire is braided by a braiding machine. In the process of making the tube body 2 , a section of braided mesh tube is cut and fastened and applied to the outer surface of the inner layer tube 701 , and then the outer layer tube 703 is put on to form an integrated lumen structure by heat fusion. Also for the spring tube 802 of the middle layer, it is wound by a spring machine for winding springs, but the manufacturing process of its tube body 2 is the same as that of the braided net tube.

In this embodiment, referring to Fig. 1 again, the pipe body 2 can be pre-molded, and the heat-fused pipe body is placed in a molding mold to be molded into a desired pre-molding angle state, specifically, the first The pipe section 21 or/and the second pipe section 22 are pre-shaped into a bent state, and are controlled by the handle 1 to further bend the first pipe section 21 or/and the second pipe section 22 within a certain arc range. In an embodiment, the pipe body 2 can also be a straight pipe.

The pipe body 2 is provided with a first fixing ring and a second fixing ring, the first drawing wire is connected to the first fixing ring, and the first fixing ring is arranged on the first pipe section 21; the second drawing wire is connected to the second fixing ring , the second fixing ring is arranged on the second pipe section 22 . Wherein, the first fixing ring is sleeved on the outer surface of the middle layer of the tube body 2 and embedded into the outer tube 703 of the tube body 2 .

17, the side wall of the first fixing ring 621 is provided with a first hole 6211, a second hole 6212 and a third hole 6213, and the second hole 6212 is closer to the first fixing ring 621 than the first hole 6211 and the third hole 6213. At the distal end, the proximal end of the first pulling wire 201 is connected to the first slider, and the distal end of the first pulling wire 201 passes through the first hole 6211, the second hole 6212 and the third hole 6213 or passes through the third hole 6213 in sequence , the second hole 6212 and the first hole 6211, and then extend to the proximal end along the tube body 2, and connect the first slider again.

18, there is a first connection line L1 between the center of the first hole 6211 and the center of the second hole 6212, and a second connection line L2 between the center of the third hole 6213 and the center of the second hole 6212. The included angle a1 between the connection line L1 and the second connection line L2 is an obtuse angle. There is an included angle a2 between the first connecting line L1 and segment L4 of the first drawing wire 201 , and an included angle a3 between the second connecting line L2 and segment L3 of the first drawing wire 201 , wherein a2 and a3 are both obtuse angles. Such setting can avoid the stress concentration of the first drawing wire, thereby improving the service life.

Similarly, the side wall of the second fixed ring is provided with a fourth hole, a fifth hole and a sixth hole, and among the fourth hole, the fifth hole and the six holes, the fifth hole is near the far end, and the structure is the same as that of the first fixed ring. The ring 621 is the same and will not be repeated here.

In this embodiment, the direction in which the side walls of the first hole 6211, the second hole 6212, and the third hole 6213 face on the first fixing ring 621 is the same as that of the fourth hole and the fifth hole on the second fixing ring. The direction facing the side wall of the sixth hole is not in the same direction. As mentioned in the handle, the length direction of the second groove 1524 is not in the same direction as the length direction of the first groove 1424 provided on the outer wall of the first rail member 142. On a straight line, that is, the trajectory of the first slider 143 and the trajectory of the second slider 153 are not on a straight line. At the same time, the first drawing wire and the second drawing wire are parallel to each other in the tube body. In addition to avoiding the mutual interference between the first drawing wire and the second drawing wire as described above, it is mainly possible to realize that the first pipe section 21 connected to the first drawing wire is bent in a different direction from the second pipe section 22 connected to the second drawing wire, so that The tube body of the adjustable curved sheath tube 100 can be bent in multiple directions, which is suitable for precise release under complex conditions and is easy to operate.

It can be understood that the first fixing ring may not be provided with a hole structure, one end of the first drawing wire is connected to the first slider, and the other end of the first drawing wire passes through the first fixing ring along the inner wall of the first fixing ring, and then reaches The distal end of the first fixing ring then extends along the outer wall of the first fixing ring until it extends to connect with the first sliding block again. The second fixing ring can also be set in this way, which will not be repeated here.

In order to further improve the fatigue life cycle of the connection between the drawing wire and the fixed ring, the drawing wire material of high-strength material can be used, such as carbon fiber wire, or nickel-titanium (NiTi) multi-strand wire with high strength, NiTi single wire with the same outer diameter Compared with NiTi multi-strand wire, the fatigue stress of NiTi multi-strand wire is smaller. When it is connected with the fixed ring, it is not easy to cause fatigue stress concentration fracture. Even if one wire breaks, other wires can adjust the angle of the tube body, and It can prolong the service life of the drawing wire. At the same time, if a wire breaks, there will be a "bang" warning sound, reminding the operator that the traction wire of the adjustable bend delivery sheath has been damaged, so it should be used carefully and the operation process should be ended as soon as possible.

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

Referring to Fig. 19, the double adjustable sheath tube 100 reaches the right atrium 330 through the inferior vena cava 312, and passes through the interatrial septal puncture point 323 to reach the left atrium 350. On the inner wall of the atrial appendage 340, the fourth pipe section 24 is not coaxial with the left atrial appendage 340. It can be seen from FIG. 20 that the position of the fourth pipe section 24 after passing through the interatrial septum 323 is x;

In order to adjust the coaxiality between the fourth pipe section 24 at the distal end of the tubular body 2 and the left atrial appendage 340, turn the first bending knob 12 on the handle to apply force to the first pulling wire 201, and the first pulling wire 201 adjusts the first The angle of the tube section 21 is such that the fourth tube section 24 goes from position x to position y, and reaches the transverse midpoint of the left atrial appendage 340;

Turn the second bending knob 13 on the handle to apply force on the second drawing wire 202, and the second drawing wire 202 adjusts the angle of the second pipe section 22, so that the fourth pipe section 24 reaches the position z from the position y to the left The longitudinal midpoint of the atrial appendage 340, so far, the fourth pipe section 24 at the distal end of the tubular body 2 is completely coaxial with the left atrial appendage 340, and the fourth tubular section 24 at the distal end of the tubular body 2 is located at the z position;

By fixing the angle and position of the tube body 2, the operator can quickly deliver, release, and recover the left atrial appendage occluder, and the operation time is short and the safety is high during the whole process.

The adjustable curved sheath tube provided in this embodiment makes the tube body and the target lesion position coaxial, the medical device can reach the target lesion position smoothly, and the medical device can be firmly fixed on the target lesion area after release, while effectively reducing the Relying on the experience of the operator who transports the medical device, the novice operator can use the adjustable curved sheath to deliver and release the medical device at will after simple training.

Referring to Fig. 21 and Fig. 22, this embodiment also provides a medical device system 1000, which includes a medical device and a fixing plate 900 for fixing the medical device. In this embodiment, the medical device is an adjustable curved sheath 100 . It can be understood that, in other embodiments, the medical device may include various delivery sheaths, implantation devices, or medical instruments. It can be understood that the delivery sheath may include a tube body and a handle, and the proximal end of the tube body is connected to the handle.

In this embodiment, the fixing plate 900 includes a fixing plate body 990 and fixing pieces, and the fixing pieces include fixing pieces 901 , 902 and 903 . One end of the medical device (or the middle part of the medical device) is fixed by the fixing part 901 and the fixing part 902, and the other end of the medical device (or the middle part of the medical device) is fixed by the fixing part 903, specifically, the fixing part 901 and the fixing part 902 respectively surround the outer surface of one end of the medical device, and the other end of the medical device passes through the fixing part 903 . In other embodiments, one or more fixtures can be used to fix one or more medical instruments. When multiple fixtures are provided, each fixture can have the same or different structure, and can be selected and designed according to needs.

Referring to Fig. 23 and Fig. 24, Fig. 23 shows that the fixture is in use, and Fig. 24 shows that the fixture is in a completed state (the outer contour of the fixture coincides with the track of the fixture on the fixture plate).

Cut the fixing piece 901 along a track 904 on the fixing plate 900. The fixing piece 901 includes a free end 908 and a connection end 907. The fixing piece 902 has the same structure as the fixing piece 901 . The fixing part 901 has a buckle 909, and the fixing part 902 has a buckle 910, and the buckle 909 and the buckle 910 can be locked and fixed to each other. One end of the medical device is respectively surrounded by the fixing part 901 and the fixing part 902 on the outer surface of the medical device, and is fixed. In another embodiment, only any one of the fixing part 901 and the fixing part 902 may be provided. The fixing part After wrapping around the outer surface of the medical device, the free end of the fixing member is fixed to the fixing plate body 990 by buckle or glue. In this embodiment, the track 904 is in an open state, and the connection 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 fixing the two fixing parts around the outer surface of the medical device, the medical device can also be fixed through the two fixing parts. Referring to the fixing piece 1003 and the fixing piece 1004 in FIG. The free end 10032 and the free end 10042 are connected to each other (for example, by buckling or gluing), and the medical device passes through the hole 10043 and the hole 10033 in turn, and is fixed. It can be understood that the hole 10043 and the hole 10033 can be open holes or closed holes, and the shape of the holes is adapted to the shape of the medical device.

Referring to Fig. 23 and Fig. 24 again, cut out the fixing piece 903 on the fixing plate 900 according to the trajectory 9030, the fixing piece 903 has a free end 9031 and a connecting end 9035, the free end 9031 can protrude from the plane where the fixing plate body 990 is located, and the connecting end 9035 Connect with the fixed plate body 990. The fixing part 903 has a cutout 9034 , and after the fixing part 903 is bent along the cutout 9034 , the free end 9031 is connected with the fixing plate body 990 . The fixing plate body 990 has an opening 9037 adapted to the free end 9031. After the free end 9031 enters the opening 9037, it is clamped and fixed. In other embodiments, it can also be glued. In other embodiments, there may be multiple cutouts at different positions on the fixing piece, and the fixing piece can be bent along the cutouts. When the outer surface of the medical device is polyhedral, the bending formed by the cutouts can make the fixing piece better. It fits closely with the outer surface of the medical device, so that the fixing part can better fix the medical device.

The fixing member 903 has a first hole 9032 and a second hole 9033 through which the medical instrument can pass through the first hole 9032 and the second hole 9033 in order to fix the medical instrument. In other embodiments, the fixing member 903 may only have the first hole 9032, and the medical device can pass through the first hole 9032, that is, it can be fixed. In FIG. 24 , the fixing member 903 also includes a third hole 9036 , the third hole 9036 is used to adapt to the shape of the medical device, so as to better fix the medical device on the fixing member 903 .

In Fig. 24, the trajectory 904 includes a start end 905 and an end end 906, and the start end 905 rotates outward relative to the fixture 901 (at this moment, the outer contour of the fixture coincides with the track of the fixture on the fixation plate), forming a first arc shape; the end end 906 rotates outward relative to the fixing piece 901 (at this time, the outer contour of the fixing piece coincides with the track of the fixing piece on the fixing plate), forming a second arc shape. In other embodiments, referring to FIG. 25, the starting ends of the fixing parts 1001, 1002, 1005 and 1006 are rotated inwardly relative to the fixing part (at this time, the outer contour of the fixing part coincides with the track of the fixing part on the fixing plate), specifically Referring to the fixture 1001, the starting end 1007 and the end 1008 of the track forming the fixture 1001 are all rotated inward relative to the fixture 1001 (the outer contour of the fixture coincides with the track of the fixture on the fixture plate at this moment). In other embodiments, any one of the starting end and the ending end of the trajectory forming the fixed part (the outer contour of the fixed part coincides with the track of the fixed part on the fixed plate at this time) rotates inwardly relative to the fixed part, and the other Rotate outwards relative to the fixed piece (at this moment, the outer contour of the fixed piece coincides with the track of the fixed piece on the fixed plate).

By setting arc-shaped designs near the starting end and near the end end, the stress can be dispersed, avoiding the stress concentration at the joint between the fixing part and the fixing plate, and effectively preventing the fixing part from moving relative to the fixed part caused by the instantaneous large momentum during transportation. The fixing plate is torn, so as to prevent the medical equipment fixed on the fixing plate from shaking and causing damage to the medical equipment.

It can be understood that, when fixing a medical device, in the same fixing plate 900 , some of the fixing parts may be provided with arcs at the start and end ends, and some of the fixing parts may not be provided with arcs at the start and end ends.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification. The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

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,

the handle comprises a first guide rail member through which the proximal end of the tube body passes and a first slider reciprocating on the first guide rail member;

the pipe body comprises a first pipe section, the traction wire comprises a first traction wire, the first traction wire is connected with the first pipe section and the first sliding block, and the reciprocating motion of the first sliding block drives the first pipe section to bend and straighten;

set up first solid fixed ring in the first pipeline section, first solid fixed ring with first pull wire is connected, wherein, first solid fixed ring's lateral wall is provided with first hole, second hole and third hole, the second hole is more first hole with the third hole is close to first solid fixed ring's distal end, the near-end of first pull wire is connected first slider, the distal end of first pull wire passes in proper order first hole, the second hole with the third hole or pass in proper order the third hole the second hole with first hole.

2. The tunable curved sheath of claim 1, wherein a first line is between a center of the first hole and a center of the second hole, a second line is between a center of the third hole and a center of the second hole, and the first line and the second line have an included angle, wherein the included angle is an obtuse angle.

3. The adjustable bending sheath of claim 1, wherein the handle further comprises a second guide member and a second slider, the slider reciprocates on the second guide member, the tube further comprises a second tube section and a third tube section, both ends of the third tube section are respectively connected with the first tube section and the second tube section, the pull wire further comprises a second pull wire, the second pull wire is connected with the second tube section and the second slider, and the reciprocating motion of the second slider drives the second tube section to bend and straighten.

4. The adjustable bend sheath of claim 3, wherein a second retaining ring is disposed within said second segment, said second retaining ring being coupled to said second pull wire.

5. The adjustable bending sheath of claim 4, wherein the side wall of the second fixing ring is provided with a fourth hole, a fifth hole and a sixth hole, the fifth hole is closer to the distal end of the second fixing ring than the fourth hole and the sixth hole, the proximal end of the second pull wire is connected to the second slider, and the distal end of the second pull wire sequentially passes through the fourth hole, the fifth hole and the sixth hole or sequentially passes through the sixth hole, the fifth hole and the fourth hole.

6. The tunable bending sheath of claim 5, wherein a first line is provided between the center of the fourth hole and the center of the fifth hole, and a second line is provided between the center of the sixth hole and the center of the fifth hole, and the first line and the second line have an included angle, and the included angle is an obtuse angle.

7. The adjustable bending sheath of claim 5, wherein the side walls of the first, second and third holes provided in the first fixing ring face in a direction different from the direction in which the side walls of the fourth, fifth and sixth holes provided in the second fixing ring face.

8. The adjustable bend sheath of claim 1, wherein the outer wall of the first rail member is provided with a first groove in the axial direction, the first groove comprising a first bottom and a first side wall, the first slider sliding within the first groove along the first side wall,

at least part of the outer wall of the first rail member is radially recessed toward the central axis of the first rail member to form the first groove, or,

the first bottom of the first groove is at least part of an outer surface of the first rail member, and the first sidewall is located on the outer surface of the first rail member.

9. The adjustable bend sheath of claim 8, wherein the first rail member has a lumen configuration,

the proximal end of the first traction wire penetrates out of the side wall of the tube body and enters the first groove to be connected with the first sliding block, or,

the first guide rail piece is provided with a first opening, and the near end of the first traction wire enters the first groove through the first opening and is connected with the first sliding block.

10. The adjustable bend sheath of claim 3, wherein the body further comprises a fourth segment, the fourth segment being located at the distal end of the body, the proximal end of the fourth segment being connected to the second segment, the fourth segment having a stiffness greater than the stiffness of the second segment.

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