Conveying sheath

Abstract

The invention relates to a delivery sheath comprising: a housing assembly extending along a longitudinal axis; the near end of the sheath tube extends into the shell assembly; the exhaust device is arranged on the far-end side of an inner cavity of the shell assembly and comprises a three-way connector, the three-way connector comprises a branch pipe and a main body pipe which are communicated with each other, the branch pipe penetrates out of the shell assembly in the radial direction and then is communicated with a three-way valve assembly, and the main body pipe is communicated with the three-way valve assembly. A near-end outlet of the main body tube is connected with a near-end sealing piece capable of sealing the main body tube, the far end of the main body tube is detachably connected with a sheath tube connecting piece, and the far-end outlet of the three-way connector is communicated with the sheath tube through the sheath tube connecting piece. The exhaust device of the delivery sheath has excellent sealing performance and good exhaust effect.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a delivery sheath. Background Art

[0002] The primary condition for interventional therapy is to accurately locate the diseased blood vessel. In addition to the skilled operation and patience of clinicians, the sheath tube plays a crucial role in interventional therapy surgery. The adjustable bend sheath is a medical device that can achieve the bending of the sheath tube, integrating the adjustable bend functions of super-selecting the target blood vessel and any release angle of the instrument, and can establish and provide a passage for the release and recovery of the implantable instrument. The adjustable bend sheath can enable clinicians to have the ability to super-select the appropriate sheath tube angle to challenge complex surgical cases.

[0003] At present, the delivery sheaths on the market include single-direction and two-direction adjustable bend sheaths, which can achieve single-direction or two-direction bending of the sheath tube. However, the existing adjustable bend sheaths do not have a feedback mechanism, and the operator cannot determine the adjustable bend progress during the operation, resulting in a deviation between the bending angle of the sheath tube and the actual requirement during the bending process, which requires a high level of the operator and leads to a long operation time. In addition, the three-way valve assembly of the existing delivery sheath is arranged on the proximal side, which has a certain obstructive effect on the operation of the operator; moreover, the sealing effect of the existing exhaust device is poor, resulting in poor exhaust effect. Summary of the Invention

[0004] Based on this, in view of the problem of poor sealing performance of the exhaust device of the delivery sheath, it is necessary to provide a delivery sheath, including: a housing assembly extending along a longitudinal axis; a sheath tube, the proximal end of which extends into the housing assembly; an exhaust device arranged on the distal side of the inner cavity of the housing assembly, the exhaust device including a three-way joint, the three-way joint including a branch tube and a main tube communicating with each other, the branch tube radially penetrating through the housing assembly, a proximal end closure for closing the proximal end outlet of the main tube is connected to the proximal end of the main tube, and a sheath tube connector for connecting the distal end outlet of the three-way joint and the sheath tube is detachably connected to the distal end of the main tube.

[0005] Further, the sheath tube connector includes a sheath tube connection head detachably connected to the distal end of the main tube, the inner wall of the proximal side of the sheath tube abuts against the distal end face of the main tube, and the outer wall of the distal side of the sheath tube abuts against the inner wall of the sheath tube connection head.

[0006] Further, the sheath tube connector further includes an adjustment sleeve received and limited in the inner cavity of the main tube, and the inner wall of the proximal side of the sheath tube also abuts against the distal end face of the adjustment sleeve.

[0007] Further, the sheath tube connector includes a first connection hole at the proximal side, a second connection hole at the distal side, and a stepped surface connecting the first connection hole and the second connection hole, and the stepped surface is in tight contact with the outer wall of the sheath tube.

[0008] Further, the stepped surface is a conical surface, a tee joint conical surface is provided on the distal end surface of the main body tube, the taper of the tee joint conical surface is equal to or substantially equal to the taper of the stepped surface, the inner wall of the proximal side of the sheath tube is in tight contact with the tee joint conical surface, and the outer wall of the distal side of the sheath tube is in tight contact with the conical surface.

[0009] Further, the distal end surface of the adjustment sleeve is an adjustment sleeve conical surface, the taper of the adjustment sleeve conical surface is equal to or substantially equal to the taper of the tee joint conical surface, and the adjustment sleeve conical surface can be flush with the tee joint conical surface and simultaneously in tight contact with the inner wall of the sheath tube.

[0010] Further, the inner diameter of the adjustment sleeve is less than or equal to the inner diameter of the sheath tube.

[0011] Further, it further includes a hollow guide rail member with an inner cavity, the guide rail member includes a guide rail member body, the tee joint is fixedly connected to the distal side of the guide rail member body, and the proximal end outlet of the guide rail member constitutes the proximal end outlet of the main body tube.

[0012] Further, a guide rail member through hole communicating with its inner cavity is provided on the side wall of the guide rail member, and a waterproof and breathable member capable of closing it is provided on the guide rail member through hole.

[0013] Further, the material of the waterproof and breathable member is selected from at least one of PTFE, dialysis paper or breathable steel.

[0014] Further, the proximal end closure includes a sealing gasket and an end cover capable of pressing the sealing gasket, the sealing gasket is sealingly connected to the proximal end surface of the main body tube or the guide rail member, and the end cover is connected to the outer peripheral surface of the proximal side of the main body tube or the guide rail member to press the sealing gasket.

[0015] The technical solution of the present invention has the following beneficial effects:

[0016] 1. The adjustable bending sheath of the present invention, through the limiting member and the limiting groove, the limiting member and the limiting groove cooperate to provide feedback to the operator to determine the position of the slider, and then the bending progress of the pipe fitting can be determined according to this position. The setting of this feedback mechanism allows the operator to gradually and progressively bend the pipe fitting, which can improve the bending operation accuracy of the operator, reduce the requirements for the operator, and improve the surgical success rate; in addition, when the limiting member is arranged in the limiting groove, the slider can be positioned at a certain position on the guide rail member, so that a certain specific bending angle of the pipe fitting can be maintained, that is, the limiting member and the limiting groove can also constitute a locking member of the slider to limit it at a certain specific position in the axial direction.

[0017] 2. The present invention prevents the pipe fitting from shifting or deforming when pulling the silk thread by setting a limiting sleeve, which can avoid the virtual position of the silk thread to a certain extent and protect the sheath tube from being damaged, and improve the bending success rate;

[0018] 3. The present invention sets an overflow glue hole and a wire threading hole on the wire pressing block, and the wire pressing block is fixed to the slider through glue, and the silk thread is fixed on the lower end side of the wire pressing block and is bent and arranged in the overflow glue hole and the wire threading hole, which increases the fixed part length of the silk thread and the wire pressing block, enhances the fixing degree of the silk thread and the wire pressing block, and can also avoid the virtual position phenomenon at the connection between the silk thread and the slider during the pulling process of the silk thread.

[0019] 4. The present invention sets an adjustment sleeve, and the corresponding specification adjustment sleeve can be selected according to the sheath tube with different inner diameters, which can increase the contact area of the adjustment sleeve with the proximal side of the sheath tube, improve the connection stability, enhance the sealing effect, and enable the delivery sheath to be assembled with sheath tubes of different inner diameters, improving its adaptability.

[0020] 5. The present invention sets the operation knob at the tail end of the handle assembly, and the operator can bend it with one hand. When cooperating with other medical devices such as a delivery sheath tube or a guide wire, the operator can bend the sheath tube with one hand and insert other medical devices with the other hand without changing hands. At the same time, the exhaust pipe is arranged on the distal side and will not interfere with the surgical operation, which can improve the operation efficiency and reduce mistakes. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of the adjustable bending sheath in the first embodiment;

[0022] Figure 2 It is an exploded view of the adjustable bending sheath in the first embodiment;

[0023] Figure 3 It is a cross-sectional view of the adjustable bending sheath in the first embodiment;

[0024] Figures 4A - 4B It is a schematic diagram of the structure of the housing assembly in the first embodiment;

[0025] Figure 5 Schematic diagram of the operating knob structure in the first embodiment;

[0026] Figures 6A - 6B Schematic diagram of the structure of the transmission sleeve in the first embodiment

[0027] Figures 7A - 7C Schematic diagram of the structure of the guide rail member in the first embodiment;

[0028] Figure 8A Schematic diagram of the structure of the first slider in the first embodiment;

[0029] Figure 8B Schematic diagram of the structure of the second slider in the first embodiment;

[0030] Figure 9 Schematic diagram of the structure of the wire pressing block in the first embodiment;

[0031] Figure 10 Schematic diagram of the wire routing of the silk thread in the first embodiment;

[0032] Figure 11 Schematic diagram of the structure of the limiting sleeve in the first embodiment;

[0033] Figure 12 Schematic diagram of the wire routing of the silk thread in the second embodiment;

[0034] Figure 13 Another schematic diagram of the wire routing of the silk thread in the second embodiment;

[0035] Figure 14 Exploded view of the exhaust device in the third embodiment;

[0036] Figures 15 - 16 Cross-sectional view of the delivery sheath in the third embodiment;

[0037] Figure 17 Schematic diagram of the three-way joint structure in the third embodiment;

[0038] Figure 18 Schematic diagram of the structure of the adjustment sleeve in the third embodiment;

[0039] Figure 19 Cross-sectional view of the sheath connector;

[0040] Figures 20 - 21 Assembly schematic diagram of sheaths and adjustment sleeves with different inner diameters;

[0041] Figure 22 Exploded view of the exhaust device in the fourth embodiment;

[0042] Figures 23 - 24Cross-sectional view of the delivery sheath in the fourth embodiment;

[0043] Figure 25 Stereoscopic structure diagram of the guide rail member;

[0044] Figure 26 Cross-sectional view of the guide rail member; Detailed implementation manners

[0045] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementations disclosed below.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a middle element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific implementation manners and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0048] It should be noted that for a delivery device, generally, the end of the delivery device that is relatively closer to the operator is referred to as the "proximal end", and the end of the delivery device that is relatively farther from the operator is referred to as the "distal end", and the "proximal end" and "distal end" of any component of the delivery system are defined based on this principle; the "axial direction" refers to the direction parallel to the line connecting the centers of the distal end and the proximal end of the medical device; the "radial direction" refers to the direction perpendicular to the axial direction.

[0049] First embodiment

[0050] Refer to Figure 1 As shown, this embodiment provides an adjustable bending sheath 1, which includes a handle assembly 100 and a pipe member 200. The proximal end of the pipe member 200 is connected to the handle assembly 100, and the pipe member 200 can be a sheath tube or a catheter. Specifically, refer to Figures 2 - 3As shown, the bending sheath 1 includes a housing assembly 90 that extends along a longitudinal axis; the proximal end of the pipe fitting 200 is connected to the housing assembly 90; a guide rail member 30 is fixedly disposed within the housing assembly 90; a first slider 51 is slidably disposed on a first side surface of the guide rail member 30; a second slider 52 is slidably disposed on a second side surface of the guide rail member 30; a wire 400 includes a first wire 400B and a second wire 400A. Among them, one end of the first wire 400B is connected to the first slider 51, and the other end is connected to a first position on the circumference of the pipe fitting 200; one end of the second wire 400A is connected to the second slider 52, and the other end is connected to a second position on the circumference of the pipe fitting 200; the transmission sleeve 40 has an internal thread, the first slider 51 and the second slider 52 are both disposed within the transmission sleeve 40, and the external threads on the two sliders cooperate with the internal thread on the transmission sleeve. By rotating the operation knob 60 to drive the transmission sleeve 40 to rotate, the first slider 51 and the second slider 52 move in opposite directions along the longitudinal axis, and further, the pipe fitting 200 is deflected in a first direction or a second direction through the first wire 400B or the second wire 400A.

[0051] In this embodiment, the adjustable bending sheath 1 is two-way adjustable and has two sliders and two wires. By operating the adjustable bending sheath, the pipe fitting 200 can be bent in two different directions in the circumferential direction. In other embodiments, it may also include only one slider and one wire, and only realize the adjustable bending operation of the pipe fitting in a single direction.

[0052] See Figures 2 - 3As shown, the handle assembly 100 includes a housing assembly 90, an operating knob 60, an exhaust device 80, and a protective sleeve 10. Among them, the operating knob 60 is rotatably arranged at the proximal end of the housing assembly 90, and the distal end face of the operating knob 60 abuts against the proximal end face of the housing assembly 90. In other embodiments, there is a certain gap between the distal end face of the operating knob 60 and the proximal end face of the housing assembly 90, and a limiting member or a locking member for the operating knob 60 can be arranged in this gap. The protective sleeve 10 is arranged at the distal end of the housing assembly 90 and is in a horn shape. The material of the protective sleeve 10 is selected from elastic materials such as silicone or rubber. The proximal end of the pipe fitting 200 passes through the distal end of the protective sleeve 10 and enters the cavity of the housing assembly 90. The protective sleeve 10 is used to prevent the part of the pipe fitting 200 in contact with it from being broken due to excessive bending angle. The exhaust device 80 is arranged on the proximal side of the operating knob 60 and includes an end cap 81, a gasket 82, a tee joint 83, a threaded joint 84, and an adjusting sleeve 85. The adjusting sleeve 85 is arranged in the threaded joint 84. The distal end of the threaded joint 84 is matched with the internal thread at the proximal end of the guide rail member 30, and the proximal end is matched with the external thread of the tee joint 83. A gasket 82 is arranged on the proximal side of the tee joint 83, and the gasket 82 is used to seal the proximal inlet of the exhaust device 80. The end cap 81 is threadedly connected to the proximal side of the tee joint 83 to fasten the gasket 82. A tee valve assembly (not shown in the figure) is connected to the vertical branch side of the tee joint 83. The tee valve assembly includes a tee valve and a hose. One end of the hose is connected to the vertical branch and the other end is communicated with the tee valve. During actual use, liquid can be injected into the tee valve and enter the pipe fitting 200 through the exhaust device 80 to realize the exhaust operation of the pipe fitting 200.

[0053] See Figures 4A - 4BAs shown, the housing assembly 90 is generally a cylindrical structure extending along the longitudinal axis. For ease of operation, in other embodiments, the middle part of the outer wall of the housing assembly 90 is recessed inward, and the outer diameter of the middle part of the outer wall of the housing assembly 90 is smaller than the outer diameters of its two ends, facilitating the operator's grip. There are multiple convex structures along the axial direction inside the housing assembly 90. Specifically, they include a first arc-shaped convex 901, a second arc-shaped convex 902, a third arc-shaped convex 903, a block-shaped convex 904, a fourth arc-shaped convex 905, and a fifth arc-shaped convex 906 arranged in sequence from the distal end to the proximal end. Each arc-shaped convex is concentrically arranged with respect to the housing assembly 90. The first arc-shaped convex 901 is arranged at the distal position of the housing assembly 90, and the fifth arc-shaped convex 906 is arranged at the proximal position of the housing assembly 90. Near the position of the fifth arc-shaped convex 906, a fourth arc-shaped convex 905 is arranged. A block-shaped convex 904 is arranged on the distal side of the fourth arc-shaped convex 905, and a third arc-shaped convex 903 and a second arc-shaped convex 902 are arranged in sequence on the distal side of the block-shaped convex 904. Among them, the third arc-shaped convex 903 includes an arc-shaped unit 9031 and stoppers 9032 arranged at both ends of the arc-shaped unit 9031. Among them, the fourth arc-shaped convex 905 is used to limit the pipe fitting 200 so that the pipe fitting 200 is located at the central position of the housing assembly 90; the second arc-shaped convex 902 is combined with the outer wall of the transmission sleeve 40 to provide support for the rotation of the transmission sleeve 40; the fifth arc-shaped convex 906 is used to protect the installation of the sleeve 10 on the housing assembly 90.

[0054] In this embodiment, for ease of processing and assembly, the housing assembly 90 can be designed to be split in half from the middle, that is, the housing assembly 90 includes a first housing 91 and a second housing 92. Multiple connection structures are arranged at the connection between the first housing 91 and the second housing 92, and the connection structure can be a snap structure and / or a convex-groove structure. The first housing 91 and the second housing 92 are connected and fastened to each other through the connection structure to form a columnar housing assembly 90. In this embodiment, a snap convex 911 is arranged on the first housing 91, and a snap groove 921 is arranged on the second housing 92. The assembly and fixation of the two housings are realized through the snap connection between the two.

[0055] See Figure 5 , the operation knob 60 is in a ring structure. The diameter of the distal opening of the ring structure can be the same as or different from the diameter of the proximal opening, and it can be designed according to the shape of the handle. Anti-slip members 601 are arranged on the outer wall of the operation knob 60, such as stripe structures, thread structures, convex block structures, etc. A slot structure 602 is arranged on the inner wall of the operation knob 60, and the slot structure 602 can be one or multiple and are evenly distributed along the circumferential direction on the inner wall of the operation knob 60.

[0056] Continue to refer to Figure 3As shown, the handle assembly 100 includes a transmission member 300. The transmission member 300 includes a transmission sleeve 40, a guide rail member 30, and a slider assembly 50. The transmission sleeve 40 is sleeved on both the guide rail member 30 and the slider assembly 50 at the same time. By rotating the transmission sleeve 40, the slider assembly 50 can be driven to move on the guide rail member 30.

[0057] Refer to Figures 6A - 6B As shown, the structure of the transmission sleeve 40 will be described. The transmission sleeve 40 is in a cylindrical shape. An internal thread structure is provided on the inner wall of the transmission sleeve 40. The internal thread structure includes a first internal thread 401 and a second internal thread 402 which are arranged crosswise. The helix directions of the first internal thread 401 and the second internal thread 402 are opposite. When the first internal thread 401 is a left-handed thread, the second internal thread 402 is a right-handed thread, or when the first internal thread 401 is a right-handed thread, the second internal thread 402 is a left-handed thread. The specific helix directions of the first internal thread 401 and the second internal thread 402 are not limited, as long as their helix directions are opposite and they are arranged crosswise on the inner wall of the transmission sleeve 40.

[0058] A convex structure 404 is provided on the outer wall of the transmission sleeve 40. The convex structure 404 cooperates with a groove structure 602 on the inner wall of the operation knob 60 to realize the fixed connection between the transmission sleeve 40 and the operation knob 60. It can be understood that in an embodiment, a groove structure can be provided on the outer wall of the proximal end of the transmission sleeve 40, and a convex structure can be correspondingly provided on the inner wall of the operation knob 60. The groove structure and the convex structure cooperate with each other. In this embodiment, the convex structure 404 on the outer wall of the transmission sleeve 40 is located at the proximal end of the transmission sleeve 40. In other embodiments, the convex structure 404 can also be located in the middle or at the distal end of the transmission sleeve 40. The position of the convex structure 404 is mainly set according to the position of the operation knob 60. In this embodiment, an annular groove 403 is further provided on the outer wall of the transmission sleeve 40. The annular groove 403 cooperates with a fifth arc-shaped protrusion 906 of the housing assembly 90, so that the transmission sleeve 40 can rotate relative to the outer housing assembly 90 but cannot move axially.

[0059] In this embodiment, for the convenience of machining and assembly, the transmission sleeve 40 is designed to be split in half from the middle, including an upper transmission sleeve 41 and a lower transmission sleeve 42. Among them, a plurality of sleeve protrusions 411 are arranged along the axis on the side wall of the upper transmission sleeve 41, and a plurality of sleeve grooves 421 that cooperate with the sleeve protrusions 411 are arranged along the axis on the side wall of the lower transmission sleeve 42, so as to realize the assembly of the upper transmission sleeve 41 and the lower transmission sleeve 42. In other embodiments, the transmission sleeve can also be integrally formed.

[0060] Refer to Figures 7A - 7BAs shown in the figure, the structure of the guide rail member 30 will be described. The guide rail member 30 includes a card slot structure 301 provided at the distal end and an internal thread 306 of the guide rail member provided at the proximal end. The card slot structures 301 are oppositely provided on the outer wall of the distal end of the guide rail member 30, and the two card slot structures 301 are formed by the depression of the outer surface of the guide rail member 30. When the guide rail member 30 is installed in the housing assembly 90, the card slot structures 301 on both sides are respectively engaged with the stoppers 9032 of the housing assembly 90, that is, the stoppers 9032 on both sides are snapped into the card slot structures 301 on both sides. At this time, the arc unit 9031 of the third arc protrusion 903 is engaged with the outer peripheral surface of the guide rail member 30. Due to the limiting effect of the stopper 9032 on the card slot structure 301, the two cannot rotate and move relative to each other, thereby realizing the fixed assembly of the guide rail member 30 and the housing assembly 90. In other embodiments, only one card slot structure and one stopper cooperating with the card slot structure may be provided.

[0061] A first depression structure 303 is provided axially between the card slot structure 301 and the internal thread 306 of the guide rail member. The first depression structure 303 includes a bottom surface 3031 and end side surfaces 3032 provided at both ends of the bottom surface 3031. In this embodiment, after removing a certain depth and axial length of material along the radial direction of the guide rail member 30, the first depression structure 303 is formed. Among them, a wire passing hole 302 is provided on the end side surface 3034 on the distal end side, and the wire passing hole 302 penetrates the guide rail member 30 along the distal end side. First slide rail grooves 304 are provided on both sides of the bottom surface 3031 along the axis. The two first slide rail grooves 304 can be symmetrically arranged with respect to the longitudinal symmetry plane of the guide rail member 301. Of course, they can also be asymmetrically arranged. The length of the first slide rail groove 304 is the same as the length of the first depression structure, and this length depends on the range of the bending angle on the pipe body 200. When the length of the first slide rail groove 304 is the same as that of the first depression structure 303, the end side surface 3034 constitutes both ends of the first slide rail groove 304. In other embodiments, the length of the first slide rail groove 304 is less than the length of the first depression structure 303. The first slide rail groove 304 includes a first side surface 3041 and a second side surface 3042, wherein the first side surface 3041 is farther from the central axis than the second side surface 3042. A first limiting groove 305 is provided on the first side surface 3041 of one of the two first slide rail grooves 304. In this embodiment, a plurality of first limiting grooves 305 are sequentially arranged at intervals in the axial direction. The plurality of first limiting grooves 305 can be arranged at equal intervals or at unequal intervals. The first limiting groove 305 can be an arc-shaped groove structure or a broken line-shaped groove structure.

[0062] See Figure 7BAs shown, a second recessed structure 307 is further provided on the opposite side of the guide rail member 306 to the first recessed structure 303. Among them, considering that the second recessed structure 307 is basically the same as the first recessed structure 303, its specific structure will not be elaborated here. In this embodiment, the second recessed structure 307 and the first recessed structure 303 are symmetrically arranged with respect to the longitudinal symmetry plane of the guide rail member. In other embodiments, the two may also be asymmetrically arranged. Two second slide rail grooves 308 that are basically the same as the structure of the first slide rail groove 304 are further provided in the second recessed structure 307. On the first side surface of one of the two second slide rail grooves 308, a second limiting groove 309 is provided. In this embodiment, the second limiting grooves 309 are sequentially arranged at intervals in the axial direction, and multiple second limiting grooves 309 may be equidistantly arranged or may not be equidistantly arranged. Among them, the number of the second limiting grooves 309 is the same as the number of the first limiting grooves 305, and at least some of the second limiting grooves 309 are aligned with the first limiting grooves 305 in the radial direction. In other embodiments, the number of the second limiting grooves 309 is different from the number of the first limiting grooves 305, and / or each second limiting groove 309 is not aligned with each first limiting groove 305.

[0063] In other embodiments, there may be only one first slide rail groove and / or second slide rail groove, which is provided on one side of the bottom surface. In other embodiments, limiting grooves may also be provided on both the first side surface and the second side surface of the first slide rail groove and / or the second slide rail groove, and the limiting grooves are not limited to being provided on the first side surface, but may also be provided on the second side surface or simultaneously provided on the first side surface and the second side surface.

[0064] See Figure 7C As shown, the guide rail member 30 is a cavity structure and has a guide rail member inner hole 311. The distal side of the guide rail member thread 306 is communicated with the guide rail member inner hole 311 through a tapered hole 310. See Figures 2 - 3 As shown, the threaded joint 84 is connected to the guide rail member thread 306.

[0065] See Figures 8A - 8B As shown, the structure of the slider assembly is described. The slider assembly 50 includes a first slider 51 and a second slider 52. See Figure 8A As shown, the first slider 51 is generally cubic in shape. A first external thread structure 511 is provided on the first arc surface 510 of the first slider 51. The first arc surface 510 is disposed opposite to the inner wall of the transmission sleeve 40. The first external thread structure 511 on the first arc surface 510 of the first slider 51 cooperates with the first internal thread 401 provided inside the transmission sleeve 40.

[0066] The side of the first slider 51 opposite to the first arc surface 510 cooperates with the first slide rail groove 304. The first slider 51 is provided with a sliding member. In this embodiment, the sliding member is a protruding sliding member 514. The surface of the first slider 51 opposite to the first arc surface 510 is provided with two protruding sliding members 514. The two protruding sliding members 514 respectively cooperate with the first slide rail grooves 304 provided on both sides, so that the first slider 51 can slide axially on the first recessed structure 303. A first stopper 515 is provided on the outer side of the protruding sliding member 514. In this embodiment, the first stopper 515 includes a support arm 5152, one end of which is fixedly connected to the first slider 51 or integrally provided, and the other end is provided with a clamping head protrusion 5151. The clamping head protrusion 5151 is a block-shaped protrusion and its two sides have chamfers or rounded corners to facilitate entering or leaving the first limit groove. When subjected to external force, the support wall 5152 rotates relative to the first slider 51 and / or the support wall 5152 itself undergoes elastic deformation, so that the first limiting member 515 as a whole provides an elastic restoring force.

[0067] When the first slider 51 slides axially along the first recessed structure 303, the two protruding sliding members 514 are respectively embedded in the two first slide rail grooves 304, wherein the first limiting member 515 cooperates with the first limiting groove 305. Specifically, when the first slider 51 slides, the first limiting member 515 will bounce regularly along with the position of the first limiting groove 305, and the clamping head protrusion 5151 will enter each first limiting groove 305 in sequence, so that the operator can provide feedback to let the operator know the relative position of the first slider 51 in the first slide rail groove 304, so that the bending progress of the pipe fitting can be determined according to the relative position, thereby improving the bending operation accuracy of the operator, reducing the requirements for the operator, and improving the success rate of the operation.

[0068] In addition, a receiving groove 512 and a first through hole 513 are also provided on the first slider 51. The first through hole 513 extends axially, passes through the first slider 51 and communicates with the receiving groove 512. A fixing piece is provided in the receiving groove 512. The fixing piece can be a screw or a fixing piece made of other materials as long as it can be fixed in the receiving groove 512.

[0069] The structure of the second slider 52 is similar to that of the first slider 51. The difference is that the second arc surface 520 of the second slider 52 has a second external thread structure 521 with a reverse helix direction to that of the first external thread structure 511. The second arc surface 520 is disposed opposite to the inner wall of the transmission sleeve 40. The second external thread structure 521 on the second arc surface 520 of the second slider 52 cooperates with the second internal thread 402 provided inside the transmission sleeve 40. As for the other structures of the second slider 52, since they are the same as those of the first slider 51, reference can be made to the first slider 51 and will not be elaborated here. It should be emphasized that on one side of the second slider 52, there is also a second limiting member 522 with the same structure as the first limiting member 515. The second limiting member 522 cooperates with the second limiting groove 309. In this application, the first limiting member 515 and the second limiting member 522 are collectively referred to as limiting members, and the first limiting groove 305 and the second limiting groove 309 are collectively referred to as limiting grooves. That is, the limiting members include the first limiting member 515 and / or the second limiting member 522, and the limiting grooves include the first limiting groove 305 and / or the second limiting groove 309.

[0070] In other embodiments, for the first slider and / or the second slider, there may be only one protruding sliding member provided, and the number of protruding sliding members matches the number of the first limiting groove and the second limiting groove. In other embodiments, the first limiting member and / or the second limiting member may also be provided inside the protruding sliding member, or simultaneously provided on the inner and outer sides of the protruding sliding member. The installation positions and the number of the first limiting member and / or the second limiting groove match the installation positions of the first limiting groove and / or the second limiting groove in the first slide rail groove and / or the second slide rail groove, so that each first limiting member and / or the second limiting member matches the corresponding first limiting groove and / or the second limiting groove. For example, when the first limiting members are provided on both the inner and outer sides of the protruding sliding member, the first limiting grooves are provided on both side surfaces of the first slide rail groove.

[0071] In other embodiments, the first limiting member and the second limiting member include telescopic rods. One end of the telescopic rod is a free end that cooperates with the limiting groove, and the other end is elastically connected to the first slider.

[0072] See Figure 9 , in this embodiment, the fixing member provided in the accommodating groove 51 is a cylindrical wire pressing block 70, and the wire pressing block 70 has a glue overflow hole 701 extending along the axis. In addition, the wire pressing block 70 may also have a slotted head 703 to facilitate the rotation of the wire pressing block 70.

[0073] See Figure 10As shown, the proximal end of the silk thread 400 enters the receiving groove 512 after passing through the through hole 513. At this time, the wire pressing block 70 is installed in the receiving groove 512, and its lower end surface presses the silk thread 400 tightly. In this embodiment, when the proximal end of the silk thread 400 passes through the through hole 513 and enters the receiving groove 512, glue is dropped into the receiving groove 512, and then the wire pressing block 70 is inserted into the receiving groove 512 to press the silk thread 400 tightly. The excess glue can be discharged through the glue overflow hole 701. The wire pressing block 70 is fixed in the receiving groove 512 by the glue to realize the connection between the silk thread 400 and the first slider 51. Further, when the proximal end of the silk thread 400 passes through the through hole 513 in the part on one side of the receiving groove 512 and enters the receiving groove 512, the silk thread 400 continues to extend to the edge of the receiving groove 512 and then bends upward to enter the through hole 513 in the other part of the receiving groove 512. In this way, when fixed by glue, the connection length between the silk thread 400 and the first slider 51 can be extended, and the connection strength between the silk thread 400 and the first slider 51 can be enhanced. In other embodiments, when the proximal end of the silk thread passes through the through hole in the part on one side of the receiving groove and enters the receiving groove, it can bend upward into the glue overflow hole and then bend downward to enter the through hole in the other part of the receiving groove.

[0074] See Figure 11 As shown, the limiting sleeve 20 has a hollow inner cavity 22, and a convex block 21 is provided on its outer side. A rectangular protrusion 23 is provided on the outer side of the limiting sleeve 20, and a limiting sleeve groove 231 communicating with the hollow inner cavity 22 is formed in the rectangular protrusion 23. See Figure 2As shown, when the limit sleeve 20 is connected to the housing assembly 90, the bump 21 is stuck in the groove of the block-shaped protrusion 904 to achieve a fixed connection with the housing assembly 90. In this embodiment, the wire 400 enters the pipe wall of the pipe fitting 200 from the outside of the pipe fitting 200 and then axially extends to the distal side of the pipe fitting 200. After the pipe fitting 200 passes through the hollow inner cavity 22, the pipe fitting with the wire 400 is inside the limit sleeve 400, and at this time, the wire 400 is at least partially located inside the limit sleeve 400. The length of the wire located in the limit sleeve 400 can be set to be greater than 0 and less than or equal to the axial length of the limit sleeve. Glue is dripped into the hollow inner cavity 22 through the groove 231 of the limit sleeve to fix the pipe fitting 200 inside the hollow inner cavity 22. When the first slider 51 or the second slider 52 moves along the guide rail and during the cooperation between the limiting member and the limiting groove, the pulling direction of the wire by the slider will change, so that the pulling force of the wire 400 acting on the pipe fitting 200 changes, which easily causes the pipe fitting to move or deform. Since the pipe fitting 200 is fixedly connected to the limit sleeve 400 and the limit sleeve 400 is fixedly connected to the housing assembly 90, pulling the wire 400 will not cause the pipe fitting 200 to move. In addition, since the limit sleeve 400 is fixed to the pipe fitting 200, the presence of the limit sleeve 400 enhances the local strength of the pipe fitting 200, which can prevent the pipe fitting 200 from deforming when the wire 400 is pulled, affecting the bending operation of the pipe fitting 200, and can avoid the virtual position of the wire to a certain extent and protect the sheath from being damaged, improving the success rate of bending.

[0075] Second Embodiment

[0076] The support device in this embodiment is basically the same as the structure of the bendable sheath in the first embodiment, only the structure of the wire pressing block is different. Refer to Figure 12 As shown, the wire pressing block 70a is integrally cylindrical, has a glue overflow hole 701a extending along the axis, and also has a wire passing hole 702a penetrating the wire pressing block 70a radially, and the wire passing hole 702a communicates with the glue overflow hole 701a. After the proximal end of the wire 400 enters the accommodating groove 512 through the through hole 513 on one side of the accommodating groove 512, it first bends downward to reach the bottom of the accommodating groove 512 and continues to extend to reach the glue overflow hole 701a, and then bends upward to enter 701a and enters the through hole 513 on the other side of the accommodating groove 512 through the wire passing hole 702a. In this embodiment, due to the provision of the wire passing hole 702a, the wire can pass through the wire passing hole 702a. When fixed with glue, on the one hand, the wire 400 is pressed between the lower end surface of the wire pressing block 70a and the accommodating groove 512, and on the other hand, it is also fixed in the glue overflow hole 701a and the wire passing hole 702a by glue, increasing the fixed part length of the wire 400 and the wire pressing block 70a, enhancing the fixing degree of the wire 400 and the wire pressing block 70a, and similarly avoiding the virtual position phenomenon at the connection between the wire 400 and the slider 70a during the pulling process of the wire 400.

[0077] See Figure 13 As shown, in this embodiment, the wire 400 can also adopt different routing methods. Specifically, the proximal end of the wire 400 directly enters the threading hole 702a after passing through the through hole 513 on one side of the receiving groove 512, bends downward at the glue overflow hole 701a to reach the bottom of the receiving groove 512, continues to extend to the edge of the receiving groove 512 and then bends upward, and enters the through hole 513 on the other side of the receiving groove 512.

[0078] Third Embodiment

[0079] The adjustable bending sheath (delivery sheath) in this embodiment is basically the same as the adjustable bending sheath in the first embodiment, except for the structure of the exhaust device.

[0080] See Figure 14 As shown, the exhaust device 500 in this embodiment includes a proximal seal 500a, a sheath tube connector 500b and a tee joint 69. Among them, the proximal seal 500a includes an end cap 68 and a gasket 67, and the sheath tube connector 500b includes an adjustment sleeve 63 and a sheath tube connector 62. The exhaust device 500 communicates with the sheath tube 200, and by inputting an exhaust liquid (such as normal saline) into the exhaust device 500, the air in the sheath tube 200 is discharged.

[0081] See Figures 15 - 16 As shown, the delivery sheath 2 in this embodiment includes a housing assembly 61 extending along the longitudinal axis, and the proximal end of the sheath tube 200 extends into the housing assembly 61. A guide rail member 64 is fixedly arranged in the housing assembly 61, a first slider and a second slider are slidably connected to the guide rail member 64, and a transmission sleeve 65 is arranged in the housing assembly 61 and sleeved on the guide rail member 64 so that the first slider and the second slider are engaged with the internally threaded portions with opposite helix directions and cross on the inner wall of the transmission sleeve 65. The proximal end of the transmission sleeve 65 extends out of the housing assembly 61 and is fixedly connected to the operation knob 66. By rotating the operation knob 66 to drive the transmission sleeve 65 to rotate, the first slider and the second slider slide in opposite directions on the guide rail member 64, so as to realize the adjustable bending of the sheath tube 200. In addition, the same as the first embodiment, in this embodiment, a limiting groove is also arranged on the guide rail member 64, and limiting members cooperating with the limiting groove are arranged on the first slider and the second slider. Considering that the basic structure of the delivery sheath in this embodiment is basically the same as that of the first embodiment, the specific relevant structures can be referred to the previous embodiments and will not be described in detail here.

[0082] Different from the first embodiment, the exhaust device 500 in this embodiment is arranged in the inner cavity of the housing assembly 61, at the distal side opposite to the operation knob 66. Its inlet end penetrates through the housing assembly 61 radially and is communicated with a three-way valve assembly (not shown in the figure). The proximal outlet is closed, and the distal outlet is fixed to the proximal end of the sheath tube 200 and communicated with each other. The exhaust liquid is injected from the inlet end of the exhaust device 500. Since the proximal outlet is closed, the liquid only flows to the distal outlet and then flows into the sheath tube 200, so that the air in the sheath tube 200 can be discharged to achieve the exhaust operation.

[0083] Refer to Figure 17 As shown, the structure of the three-way joint 69 will be described. The three-way joint 69 includes a branch pipe 691 and a main pipe 692 that are communicated with each other. Among them, the end of the branch pipe 691 far from the main pipe (i.e., the free end of the branch pipe 691, which is also the inlet end of the exhaust device 500) can be communicated with a three-way valve assembly (not shown in the figure), and the other end is communicated with the main pipe 692. External threads are provided on the outer peripheries of the proximal and distal ends of the main pipe 692, and the distal end face has a three-way joint conical surface 6922. In addition, a limiting protrusion 6921 extending along the longitudinal axis is provided on the inner wall of the lumen of the main pipe 692. The length of the limiting protrusion 6921 can be equal to or different from the axial length of the main pipe 692, and the distal end of the limiting protrusion 6921 can be flush or not flush with the distal end face of the three-way joint 69. When the distal end of the limiting protrusion 6921 is at a certain distance from the three-way joint 69 and is not flush, compared with being flush, the adjustment sleeve can slide more into the three-way joint along the proximal end, so that the connection between the two is more stable.

[0084] Refer to Figure 18As shown in the figure, the structure of the adjustment sleeve 63 will be described. The adjustment sleeve 63 as a whole is a cylindrical structure with an inner cavity, including a cylindrical part and an adjustment sleeve conical surface 634 provided on the distal side of the cylindrical part. The taper of the adjustment sleeve conical surface 634 is equal to or substantially equal to the taper of the tee joint conical surface 6922 provided at the distal end of the main pipe 692. The tapers being substantially equal takes into account certain dimensional tolerances in the actual manufacturing process. In the present invention, it means that the cone angles can differ within plus or minus 1 degree. The lengths being substantially equal in the present invention takes into account certain dimensional tolerances in the actual manufacturing process, and its dimensional tolerance is within plus or minus 2 millimeters. Additionally, a sleeve through groove 632 is provided on the outer periphery of the adjustment sleeve 63, which extends a certain distance along the longitudinal axis starting from the proximal side, penetrating the inner cavity of the adjustment sleeve 63 to the outside. In this embodiment, the proximal end of the sleeve through groove 632 is flush with the proximal end face of the adjustment sleeve 63 and extends a certain distance, and this distance is less than the length of the cylindrical part of the adjustment sleeve 63. In other embodiments, the length of the sleeve through groove 632 can also be equal to the axial length of the cylindrical part. At a position radially opposite to the sleeve through groove 632 on the outer periphery of the adjustment sleeve 63, an adjustment sleeve groove 633 is provided. The adjustment sleeve groove 633 cooperates with the limit protrusion 6921 of the tee joint 69, and after aligning the two, the limit protrusion 6921 can slide into the adjustment sleeve groove 633 to realize the assembly of the adjustment sleeve 63 into the inner cavity of the tee joint 69.

[0085] See Figure 14 , 19 As shown in the figure, the structure of the sheath tube connector 62 will be described. The sheath tube connector 62 is a hollow structure with an inner cavity, and its inner cavity includes a first connection hole 623 on the proximal side, a second connection hole 621 on the distal side, and a stepped surface 622 connecting the first connection hole 623 and the second connection hole 621. In this embodiment, the inner diameter of the first connection hole 623 is larger than the inner diameter of the second connection hole 621, so as to form a stepped surface 622 at the connection of the two. Among them, the stepped surface 622 is a conical surface, and its conical surface matches the tee joint conical surface 6922, and their cone angles are equal or substantially equal. Among them, in this embodiment, the first connection hole 623 is an internal threaded hole, and its thread matches the thread on the distal end side of the tee joint 69. Through this threaded hole, the threaded connection between the sheath tube connector 62 and the distal end side of the tee joint 69 can be realized. In other embodiments, this stepped surface can also be a flat surface perpendicular to the longitudinal axis.

[0086] Continue to see Figures 15 - 16As shown in the figure, the structure of the exhaust device 500 will be further described. After aligning the sleeve through groove 632 of the adjustment sleeve 63 with the limit protrusion 6921 on the tee joint 69, the adjustment sleeve 63 is inserted into the inner cavity of the tee joint 69 and pushed in the proximal direction. At this time, the limit protrusion 6921 slides in the sleeve through groove 632. When the end face of the adjustment sleeve groove 633 abuts against the distal end face of the limit protrusion 6921 and cannot slide relative to each other any further, the installation is in place. At this time, the adjustment sleeve 63 is fixedly received in the main pipe 692, and the conical surface 634 of the adjustment sleeve is flush with the tee joint conical surface 6922 at the distal end face of the main pipe 692, jointly forming a conical surface structure. In this embodiment, the adjustment sleeve 63 is axially limited by setting the mutually matching limit protrusion 6921 and the adjustment sleeve groove 633. After the two are installed in place, the adjustment sleeve 63 cannot move further relative to the tee joint 69 in the proximal direction. The lengths and relative positions of the limit protrusion 6921 and the adjustment sleeve groove 633 determine the position of the adjustment sleeve 63 received in the tee joint 69 in the longitudinal axis direction. In this embodiment, the requirement is that the conical surface 634 of the adjustment sleeve is flush with the tee joint conical surface 6922. In other embodiments, a protruding structure may also be provided on the adjustment sleeve along the longitudinal axis, and a groove structure matching it may be provided on the inner wall of the tee joint. After the adjustment sleeve 63 and the tee joint 69 are assembled, the adjustment sleeve 63 communicates with the branch pipe 691 of the tee joint 69 through the sleeve through groove 632 provided thereon. The sleeve through groove 632 is provided to prevent the adjustment sleeve 63 from blocking the branch pipe 691. Therefore, there is no special requirement for the length of the through groove 632 along the longitudinal axis in this embodiment, as long as the branch pipe 691 of the tee joint communicates with the adjustment sleeve 63 after the adjustment sleeve 63 is installed in place relative to the tee joint 69. The adjustment sleeve 63 in this embodiment has a certain length. When installed in the tee joint 69, its proximal end face straddles the branch pipe to ensure a stable connection between the tee joint 69 and the adjustment sleeve 63. In other embodiments, the length of the adjustment sleeve may also be relatively shortened so that the adjustment sleeve is fixedly received on one side of the branch pipe. At this time, the end face of the adjustment sleeve inside the tee joint is closer to the distal end relative to the connection port of the branch pipe and the main pipe. At this time, since the adjustment sleeve is shortened and only provided on one side of the branch pipe and does not block the branch pipe, the sleeve through groove may not be provided.

[0087] Continue to refer to Figures 15 - 16 , the tee structure 69 is installed in the housing assembly 61, and its branch pipe 691 penetrates out of the housing assembly 61 in the radial direction and communicates with a tee valve assembly (not shown in the figure). A sealing gasket 67 is provided on the proximal end face of the main pipe 692, and an end cover 68 that can press the sealing gasket 67 is connected to the proximal outer periphery. Among them, the sealing gasket 67 can be an elastic sealing material such as silica gel or rubber, and a linear or cross-shaped cut is provided thereon for a guide wire or other sheath to pass through in a sealed manner.

[0088] In this embodiment, the end cap 68 is provided with internal threads, which cooperate with the external threads on the outer periphery of the proximal end of the main body tube 692 to form a threaded connection. By tightening the end cap 68, the gasket 67 is pressed against the proximal end face of the main body tube 692, thereby closing the proximal outlet of the exhaust device. The distal end of the main body tube 692 is threadedly connected to a sheath connector 62. The inner wall of the proximal side of the sheath 200 abuts against both the sleeve conical surface 634 and the tee joint conical surface 6922, and the outer wall abuts against the inner wall of the step surface 622 of the sheath connector 62 to fix and interconnect the distal outlet of the exhaust device with the proximal end of the sheath 200.

[0089] See Figures 20 - 21 As shown, the adjustment sleeve 13 in this embodiment has multiple specifications, and each specification is adapted to the corresponding sheath specification. The function of the adjustment sleeve 13 in this embodiment will be described. The adjustment sleeve 13 in this embodiment can be adjusted accordingly according to the inner diameter of the sheath 200. See Figure 20 As shown, the sheath 200 is fixed by being squeezed by the adjustment sleeves 13 on both sides and the sheath connector 13. When the wall thickness of the sheath 200 increases and the inner diameter decreases (as shown by the dotted line after the decrease), at this time, on the premise of ensuring that other dimensions and shapes remain unchanged, the wall thickness of the adjustment sleeve 13 can be appropriately increased and the inner diameter decreased so that the inner diameter of the adjustment sleeve 13 is greater than or equal to the inner diameter of the adjustment sleeve 13. By comparison Figures 20 - 21 It can be seen that when the inner diameter of the adjustment sleeve 13 decreases, the size of its sleeve conical surface 634 increases accordingly. Therefore, the contact area between the inner wall surface of the sheath 200 and the sleeve conical surface 634 also increases accordingly, which can better realize the clamping of the sheath 200 by the sleeve conical surface 634, improve the connection stability between the two and enhance the sealing effect. In addition, when the inner diameter of the sheath 200 changes, the adjustment sleeve 13 also changes accordingly, so that the inner diameter of the adjustment sleeve 13 is always less than or equal to the inner diameter of the sheath. When the inner diameter of the adjustment sleeve is equal to the inner diameter of the sheath, the inner cavities of the two are flush at the connection; when the inner diameter of the adjustment sleeve is less than the inner diameter of the sheath, the step formed by the two faces the distal end; therefore, when the exhaust liquid flows from the adjustment sleeve to the distal end of the sheath, it will not be blocked by the inner diameter difference between the two, and the flow of the exhaust liquid can be made smoother. Therefore, in this embodiment, by providing a replaceable adjustment sleeve, a stable connection can be achieved with sheaths of different wall thicknesses, so that the delivery sheath can be replaced with sheaths of different wall thicknesses.

[0090] In other embodiments, the adjustment sleeve may not be provided, and only the tee joint and the sheath connector are used to clamp the sheath. In other embodiments, the distal end face of the adjustment sleeve, the distal end face of the main body tube, and the step face of the sheath connector can all be set as flat straight faces.

[0091] Fourth Embodiment

[0092] The delivery sheath in this embodiment is basically the same in structure as the delivery sheath in the third embodiment, with the only difference being that in this embodiment, the guide rail member and the tee joint are fixed or set as an integral structure, and correspondingly, the gasket and the end cap are arranged on the proximal end face of the guide rail member.

[0093] See Figures 22 - 24 As shown, the exhaust device 600 of the delivery sheath 3 in this embodiment includes a proximal seal 600a, a guide rail member 14, and a sheath connecting member 600b. Among them, the proximal seal 600a includes an end cap 16 and a gasket 15, and the sheath connecting member 600b includes an adjustment sleeve 13 and a sheath connector 12. Considering that the end cap 16, the gasket 15, the adjustment sleeve 14, and the sheath connector 12 in this embodiment are basically the same as those in the previous embodiment, their specific structures will not be elaborated here. The exhaust device 600 is communicated with the sheath 200, and by inputting an exhaust liquid (such as physiological saline) into the exhaust device 600, the air in the sheath 200 is discharged.

[0094] See Figures 25 - 26 As shown, the structure of the guide rail member 14 in this embodiment is described. The guide rail member 14 in this embodiment is a hollow structure with an inner cavity, including a guide rail member body 142 and a tee joint 141 fixedly communicated with the distal side of the guide rail member body 142. Among them, the guide rail member body 142 and the tee joint 141 can be integrally arranged. At this time, the guide rail member 14 includes the guide rail member body 142 and the tee joint 141. The guide rail member body 142 and the tee joint 141 can also be separately arranged and then fixed. At this time, the guide rail member 14 in this embodiment only includes the guide rail member body 142 and does not include the tee joint 141. An external thread 1422 of the guide rail member is arranged on the outer periphery of the proximal end face of the guide rail member 14. On the side wall close to the external thread 1422 of the guide rail, a through hole 1421 of the guide rail member communicated with the inner cavity of the guide rail member 14 is opened. The tee joint 141 includes a branch pipe 1411 and a main pipe 1412 that are communicated with each other. The same as in the third embodiment, in this embodiment, the distal end face of the main pipe 1412 is provided with a tee joint cone surface 1412, and a limiting protrusion 1413 extending along the longitudinal axis is arranged on the inner wall for cooperation with the adjustment sleeve 13.

[0095] Continue to see Figures 23 - 24As shown, a sealing gasket 15 is provided on the proximal end face of the guide rail member body 142, and an end cover 16 that can press the sealing gasket 15 is connected to the proximal outer periphery. A waterproof and breathable member 17 that can close the through hole 1421 of the guide rail member is provided on the through hole 1421 of the guide rail member. The waterproof and breathable member 17 can be in the structural form of a waterproof and breathable film or a waterproof and breathable block, and its material is selected from at least one of PTFE, dialysis paper, or breathable steel, which can pass air in the form of small molecules but block liquids in the form of large molecules, such as blood, water, exhaust liquid, etc. The branch pipe 1411 penetrates the housing assembly 11 radially and then communicates with a three-way valve assembly (not shown in the figure). The distal end of the main pipe 1412 is detachably connected to a sheath connector 12, and the three-way joint taper surface 1412 of the main pipe 1414 abuts against the inner wall of the proximal side of the sheath 200, and the inner wall of the sheath connector 12 abuts against the outer wall of the sheath 200.

[0096] In this embodiment, a adjusting sleeve taper surface 131 is provided at the distal end of the adjusting sleeve 13, which has the same or substantially the same taper as the three-way joint taper surface 1412. The adjusting sleeve 13 is fixedly received in the main pipe 1412, and the adjusting sleeve taper surface 131 is flush with the three-way joint taper surface 1412 and abuts against the inner wall of the sheath 200 at the same time.

[0097] When injecting exhaust liquid through the branch pipe 1411, the exhaust liquid will flow along both the proximal side and the distal side after entering the three-way joint 141. For the proximal side, the proximal opening is closed by the sealing gasket 15, and a waterproof and breathable member 17 is provided in the through hole 1421 of the side wall near the proximal opening. Therefore, as the exhaust liquid gradually flows towards the proximal end, the air in the cavity will be discharged from the waterproof and breathable member 17, and since the proximal opening is sealed and the exhaust liquid cannot pass through the waterproof and breathable member 17, the exhaust liquid will not flow out from the proximal side; for the distal side, the exhaust liquid will flow into the sheath 200 through the three-way joint 141, thereby discharging the air in the sheath and achieving the purpose of exhaust.

[0098] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. The protection scope of the invention patent shall be subject to the appended claims.

Claims

1. A delivery sheath, characterized in that, it comprises: a housing assembly extending along a longitudinal axis; a sheath tube, the proximal end of which extends into the housing assembly; an exhaust device provided on the distal side of the inner cavity of the housing assembly, the exhaust device comprising a three-way joint, the three-way joint comprising a branch pipe and a main pipe communicating with each other, the branch pipe penetrating through the housing assembly in the radial direction, a proximal end closure for closing the proximal end outlet of the main pipe is connected to the proximal end of the main pipe, and a sheath tube connector for communicating the distal end outlet of the three-way joint with the sheath tube is detachably connected to the distal end of the main pipe.

2. The delivery sheath according to claim 1, characterized in that, the sheath tube connector comprises a sheath tube connection head detachably connected to the distal end of the main pipe, the inner wall of the proximal side of the sheath tube abuts against the distal end face of the main pipe, and the outer wall of the distal side of the sheath tube abuts against the inner wall of the sheath tube connection head.

3. The delivery sheath according to claim 2, characterized in that, the sheath tube connector further comprises an adjustment sleeve received and limited in the inner cavity of the main pipe, and the inner wall of the proximal side of the sheath tube further abuts against the distal end face of the adjustment sleeve.

4. The delivery sheath according to claim 3, characterized in that, the sheath tube connection head comprises a first connection hole on the proximal side, a second connection hole on the distal side, and a stepped surface communicating the first connection hole and the second connection hole, and the stepped surface abuts against the outer wall of the sheath tube.

5. The delivery sheath according to claim 4, characterized in that, the stepped surface is a conical surface, a three-way joint conical surface is provided on the distal end face of the main pipe, the taper of the three-way joint conical surface is equal to or substantially equal to the taper of the stepped surface, the inner wall of the proximal side of the sheath tube abuts against the three-way joint conical surface, and the outer wall of the distal side of the sheath tube abuts against the conical surface.

6. The delivery sheath according to claim 5, characterized in that, the distal end face of the adjustment sleeve is an adjustment sleeve conical surface, the taper of the adjustment sleeve conical surface is equal to or substantially equal to the taper of the three-way joint conical surface, and the adjustment sleeve conical surface can be flush with the three-way joint conical surface and simultaneously abut against the inner wall of the sheath tube.

7. The delivery sheath according to claim 3, characterized in that, the inner diameter of the adjustment sleeve is less than or equal to the inner diameter of the sheath tube.

8. The delivery sheath according to claim 2, characterized in that, it further comprises a hollow guide rail member having an inner cavity, the guide rail member comprising a guide rail member body, the three-way joint is fixedly communicated with the distal side of the guide rail member body, and the proximal end outlet of the guide rail member constitutes the proximal end outlet of the main pipe.

9. The delivery sheath according to claim 8, characterized in that, a guide rail member through hole communicating with its inner cavity is provided on the side wall of the guide rail member, and a waterproof and breathable member for closing the guide rail member through hole is provided on the guide rail member through hole.

10. The delivery sheath according to claim 9, characterized in that, the material of the waterproof and breathable member is selected from at least one of PTFE, dialysis paper or breathable steel.

11. The delivery sheath according to any one of claims 1-10, characterized in that, The proximal closure includes a gasket and an end cap that can press the gasket tightly. The gasket is sealingly connected to the proximal end face of the main body tube or the guide rail member, and the end cap is connected to the outer peripheral surface of the proximal side of the main body tube or the guide rail member to press the gasket tightly.

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