Conveyor handle and conveying system thereof

Abstract

The invention relates to a conveyor handle and a conveying system thereof, and the conveyor handle is used for conveying an intravascular stent and comprises a support rod which is provided with an inner cavity and extends along a longitudinal axis; at least part of the three-way connector is arranged in the inner cavity of the supporting rod, the three-way connector is provided with a branch pipe, and a first transmission thread is arranged on the periphery of the far end of the three-way connector; the near end of the push rod penetrates through the inner cavity of the supporting rod and then is fixed in the three-way connector; the adjusting knob is rotationally clamped on the periphery of the supporting rod and is provided with a second transmission thread meshed with the first transmission thread; and the push rod can be driven to move along the longitudinal axis by rotating the adjusting knob. The conveyor handle can drive the supporting rod to move in the sheathing canal along the longitudinal axis by operating the adjusting knob, so that a gap between the push rod and the support is eliminated, and the sheathing canal is prevented from being bent at the gap.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a conveyor handle and a conveying system thereof. Background Art

[0002] During interventional surgery, a conveyor is usually used to deliver medical devices such as stents to the location of vascular lesions to treat vascular stenosis, hemangioma, vascular dissection, etc. During the delivery of the stent, the stent is usually installed in the sheath of the conveyor, and the stent is in a compressed and restrained state. When it reaches the predetermined position, the sheath is withdrawn so that the stent can break free from the restraint of the sheath and expand to restore its deformation, and then anchored at the predetermined position of the blood vessel.

[0003] See also Figure 1 As shown, a push rod 2 is provided inside the sheath tube 1 to enhance the structural strength of the sheath tube, and a stent 3 is installed in the sheath tube 1 at the distal end of the push rod. Since the length of the push rod 2 cannot be changed, when the stent 3 is assembled in the sheath tube, a gap G will exist between the push rod 2 and the stent 3 due to manufacturing tolerances or different lengths of stents of different specifications. The gap G constitutes a cavitation gap, where there is neither a stent nor a push rod inside the sheath tube, and its structural strength is the weakest, constituting a weak section. During the transportation process, the sheath tube is easily bent at the weak section, resulting in damage to the sheath tube or inability to continue to push forward. Summary of the invention

[0004] Based on this, it is necessary to provide a conveyor handle for conveying a vascular stent in response to the above-mentioned problem, comprising: a support rod having an inner cavity and extending along the longitudinal axis; a three-way joint, which is at least partially arranged in the inner cavity of the support rod, the three-way joint having a branch tube and a first transmission thread arranged on the distal periphery; a push rod, the proximal end of which passes through the inner cavity of the support rod and is fixed in the three-way joint; an adjusting knob, which is rotatably clamped on the outer periphery of the support rod and has a second transmission thread meshing with the first transmission thread; rotating the adjusting knob can drive the push rod to move along the longitudinal axis.

[0005] Furthermore, a stent top sleeve is fixedly connected to the distal end side of the push rod, and the stent top sleeve can be sleeved on the outer periphery of the vascular stent.

[0006] Furthermore, the stent top sleeve includes a sleeve connection portion arranged on the distal side and a push rod connecting portion on the proximal side, the sleeve connection portion can be sleeved on the outer periphery of the vascular stent, the push rod connecting portion is fixedly connected to the push rod, and the first inner diameter of the sleeve connection portion is greater than the second inner diameter of the push rod connecting portion.

[0007] Furthermore, the inner wall of the sleeve portion is provided with a plurality of limiting protrusions along the circumferential direction, and the bare wave ring at the distal end of the vascular stent can be hooked on the limiting protrusions.

[0008] Furthermore, the first outer diameter of the sleeve connection portion is greater than the second outer diameter of the push rod connection portion; or, the inner cavity of the sleeve connection portion is configured as a conical structure that gradually increases from the proximal end to the distal end, and the minimum inner diameter of the conical structure is greater than the second inner diameter of the push rod connection portion.

[0009] Furthermore, an exhaust through hole extending in the radial direction is provided on the outer circumference of the push rod, and the exhaust through hole is at least partially aligned with the inner cavity of the branch pipe to connect the branch pipe with the inner cavity of the push rod.

[0010] Furthermore, a rear handle is provided on the proximal side of the support rod, a support rod limiting structure is provided on the outer periphery of the proximal side of the support rod, and a rear handle limiting structure and a penetrating slide groove are provided on the distal side of the rear handle; the rear handle is sleeved on the outside of the three-way joint and the branch pipe is slidably connected to the slide groove, and the distal side and proximal side of the inner wall of the adjusting knob are respectively provided with a first limiting structure and a second limiting structure that are clamped with the support rod limiting structure and the rear handle limiting structure.

[0011] Furthermore, the proximal opening of the push rod is hermetically connected with a sealing member.

[0012] Furthermore, the push rod is fixedly connected to the sealing member; or, it further includes an elastic member arranged in the rear handle, the elastic member is in a compressed state and its distal end abuts against the sealing member, and its proximal end abuts against the rear handle.

[0013] Furthermore, a sealing flange is arranged on the outer periphery of the sealing member, an elastic member limiting structure is arranged on the bottom wall of the rear handle, the distal end of the elastic member abuts against the sealing flange, and the proximal end is sleeved on the elastic member limiting structure.

[0014] Furthermore, an annular limiting structure is provided on the sealing flange, and the distal end side of the elastic member is clamped in the annular limiting structure.

[0015] The present application also relates to a delivery system, comprising the aforementioned delivery handle, and also comprising: a front handle, which is movably mounted on the outer periphery of the support rod; a sheath, the proximal end of which is slidably inserted into the support rod and fixedly connected to the front handle, and the support rod is slidably inserted into the sheath.

[0016] The technical solution of the present invention has the following beneficial effects:

[0017] The conveyor handle and conveying system of the present invention can drive the push rod to move along the longitudinal axis by operating and adjusting the rotation, changing its position in the sheath, thereby eliminating the gap between the stent and the push rod, preventing the sheath from bending at the gap during the conveying process and being damaged or unable to continue to be pushed along the blood vessel, thereby reducing the surgical risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a first embodiment in which there is an installation gap between the push rod and the bracket;

[0019] Figure 2 It is a schematic diagram of the overall structure of the conveying system of the first embodiment;

[0020] Figure 3 It is a structural diagram of the support of the first embodiment;

[0021] Figure 4 It is a structural diagram of the sheath-core assembly of the first embodiment;

[0022] Figure 5 For the first embodiment Figure 2 A in the enlarged view;

[0023] Figure 6 is a cross-sectional view of the conveyor handle of the first embodiment;

[0024] Fig. 7A The first embodiment is a cross-sectional view of the top sleeve of the bracket along the longitudinal axis direction;

[0025] Figure 7B is a cross-sectional view of the bracket top sleeve of the first embodiment in a direction perpendicular to the longitudinal axis;

[0026] Figure 8 For the first embodiment Figure 6 A in the enlarged view;

[0027] Fig. 9 is a three-dimensional structural diagram of the three-way connector of the first embodiment;

[0028] Fig.10 It is a partial three-dimensional structural diagram of the support shaft of the first embodiment;

[0029] Fig.11A It is a left side view of the rear handle of the first embodiment;

[0030] Fig. 11B For the first embodiment Fig.11A The cross-sectional view along AA in FIG.

[0031] Fig. 12A is a three-dimensional structural diagram of the adjustment knob of the first embodiment;

[0032] Fig. 12B It is a front view of the adjustment knob of the first embodiment;

[0033] Fig.13 is a cross-sectional view of a sealing member of the first embodiment;

[0034] Fig.14A cross-sectional view of the top sleeve of the bracket in the second embodiment;

[0035] Fig.15 is a cross-sectional view of a top sleeve of a bracket in a third embodiment; DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of 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 violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0039] It should be noted that for a conveyor, the end of the conveyor that is relatively close to the operator is generally called the "proximal end", and the end of the conveyor that is relatively far from the operator is called the "distal end". Based on this principle, the "proximal end" and "distal end" of any component of the conveying system are defined; "axial" refers to the direction parallel to the line connecting the distal center and the proximal center of the medical device; "radial" refers to the direction perpendicular to the axial direction. For a stent, the end close to the heart is generally called the "proximal end", and the end originally away from the heart is called the distal end.

[0040] First embodiment

[0041] See also Figure 2As shown, this embodiment provides a delivery system 100, including a delivery handle 300, which includes a support rod 40, a rear handle 50 is provided on the proximal side of the support rod 40, and an adjustment knob 70 is rotatably provided between the rear handle 50 and the support rod 40. A front handle 30 is also provided on the outer periphery of the support rod 40, and the front handle 30 is located at the distal side of the delivery handle 300. The proximal end of the sheath tube 20 is slidably inserted into the support rod 40 and fixedly connected to the front handle 30, and a sheath core assembly 10 is provided on the distal side of the sheath tube 20, and the stent 200 is bound to the distal side of the sheath tube 20 after being compressed, and the sheath core assembly 10 is used to anchor the proximal side of the stent 200, and the sheath tube 20 can be driven to withdraw by operating the front handle 30 to realize the release of the stent 200. Among them, the stent 200 is loaded into the sheath tube 20 after being compressed, and the stent 200 will fit closely with the inner wall of the sheath tube 20 due to the elastic restoring force. However, since the stent 200 does not deform into a regular circle after being compressed, but becomes an irregular polygon, there is still a gap between the stent 200 and a part of the inner wall 20 of the sheath tube.

[0042] See also Figure 3 As shown, the stent in this embodiment includes a stent body 210, a proximal bare wave ring 220 is provided at the proximal side of the stent body 210, and a distal bare wave ring 230 is provided at the distal side of the stent body 210. In other embodiments, only a proximal bare wave ring may be provided without a distal bare wave ring.

[0043] See also Figure 4 As shown, the structure of the sheath core assembly 10 is described. The sheath core assembly 10 includes an inner sheath core 14 and an outer sheath core 13. A guide head 11 is fixedly connected to the distal end of the inner sheath core 14. The guide head 11 is also called a TIP head, which is used to guide the forward direction of the sheath tube and prevent damage to the blood vessel wall during transportation. A plurality of fixed grooves (not marked in the figure) are formed on the outer surface of the proximal end of the guide head 11. The fixed groove can be formed by a fixed protrusion provided at the end of the guide head 11 or directly grooved. The outer sheath core 13 is slidably sleeved on the periphery of the inner sheath core 14, and its distal end has an anchor head 12. The anchor head 121 includes a plurality of anchoring columns spaced circumferentially, so that the cross section of the anchor head 12 is petal-shaped. The anchor head 12 is used to cooperate with the proximal bare wave ring 220 of the stent 100 to control the release of the proximal end of the stent 200. Specifically, the outer core tube 13 slides axially relative to the guide head 11 in a direction close to the guide head 11, so that the plurality of anchoring columns are respectively embedded in the plurality of fixing grooves on the guide head 11, that is, the proximal bare wave ring 220, the anchoring head 12 and the guide head 11 are in a closed state, and the proximal end of the stent 200 is restrained. When the outer core tube 13 slides axially relative to the guide head 11 in a direction away from the guide head 11, the anchoring head 12 can be separated from the guide head 11, and the restraint of the proximal end of the stent 200 by the anchoring head 12 is released to achieve the rear release of the stent.

[0044] See also Figure 5 As shown, the installation of the stent 200 in the delivery system 100 in this embodiment is described. When the stent 200 is installed in the sheath tube 20, it is bound in the sheath tube 20, and the proximal side (the side closer to the heart) of the stent 200 is bound by the anchor head 12. By rotating the adjustment knob 71, the push rod 72 can be driven to move toward the distal end, and the push rod 72 can abut against the distal end of the stent 200, so that the gap between the push rod 72 and the stent 200 can be eliminated. In addition, in order to completely eliminate the gap between the push rod 72 and the stent 200 and eliminate the existence of the weak area of ​​the sheath tube, in this embodiment, a stent top sleeve 73 is also fixedly installed on the distal side of the push rod 72. As the push rod 72 moves toward the distal end to gradually approach the stent 200, the stent top sleeve 72 can be sleeved on the outer periphery of the stent 200. On the one hand, since the stent top sleeve 72 with a certain axial length is provided at the end of the push rod 72, the distal end of the push rod 72 does not need to abut against the end side of the stent 200 to achieve the elimination of the gap. Therefore, the provision of the stent top sleeve 72 reduces the necessary stroke of the push rod 72 and the adjustment amount of the adjustment knob 71; on the other hand, since the stent top sleeve 72 can be sleeved on the outer peripheral end of the stent 200, the gap between the push rod 72 and the stent 200 can be completely eliminated, and the generation of cavitation gaps can be eliminated. At this time, there is at least a stent fixed sleeve 72 between the distal end side of the stent 200 and the proximal end side of the push rod 22. The stent top sleeve 72 can enhance the strength of the sheath tube, avoiding bending in the weak area during the pushing process, which may cause damage to the sheath tube or failure of the operation.

[0045] See also Figure 6As shown, the structure of the conveyor handle 300 of this embodiment is described. The conveyor handle 300 has a support rod 40, which has an inner cavity and extends along the longitudinal axis. The support rod 40 constitutes a support component of the entire conveying system 100, which is used to support the front handle 30 and other components. A three-way joint 74 is slidably arranged in the support rod 40, which can be externally connected to a hose 60. The hose 60 can be connected to a three-way valve (not shown in the figure), through which a liquid (physiological saline) can be injected into the hose to exhaust the conveying system 100, or contrast agents or drugs can be injected into the hose so as to be transported to the target position of the human body through the sheath. A push rod 73 is fixed in the three-way joint 74, and the proximal end of the push rod 73 passes through the inner cavity of the support rod 40 and is inserted into the inner cavity of the three-way joint 74, and is fixedly connected to the three-way joint 74. In this embodiment, the fixed connection between the push rod 73 and the three-way joint 74 is achieved by a push rod lock 75. The push rod lock 75 is a sleeve structure with an inner cavity, and its outer circumference is provided with an outer thread, and the three-way joint 74 is provided with an inner thread matching the outer thread. The proximal end of the push rod 73 can be inserted into the inner cavity of the push rod lock 75 and fixedly connected with the push rod lock 75. The outer circumference of the push rod 73 and the inner wall of the push rod lock 75 can be bonded with glue, or can be hot-melted or welded, or can be connected by interference or clamping. The push rod 73 is fixedly inserted into the push rod lock 75, and the push rod lock 75 and the three-way joint 74 are fixed by threaded connection, so as to achieve the fixed connection between the push rod 73 and the three-way joint 74. In other embodiments, the push rod 73 and the three-way joint 74 can be directly connected by bonding, hot-melting, interference or clamping without using the push rod lock 75. A rear handle 50 is also provided on the proximal side of the support rod 40, and the rear handle 50 is sleeved on the proximal side of the three-way joint 74, so that the three-way joint 74, the push rod 73 and the push rod lock 75 are located in the cavity formed by the rear handle 50 and the support rod 40, and the push rod 73 can move along the longitudinal axis in the cavity.

[0046] See also Figure 7A-7BAs shown, the structure of the stent top sleeve 73 in this embodiment is described. The stent top sleeve 73 is a hollow sleeve-shaped structure, including a sleeve connection portion 731 arranged on the distal side and a push rod connection portion 732 arranged on the proximal end. The sleeve connection portion 731 is used to be sleeved on the outer periphery of the stent 200 to connect with the stent 200, and the push rod connection portion 732 is used to connect with the push rod 72. The sleeve connection portion 731 has a first inner diameter d1 and a first outer diameter D1, and the push rod connection portion 732 has a first inner diameter d2 and a second outer diameter D2. Among them, in this embodiment, the inner diameter of the first inner diameter d1 is greater than the second inner diameter d2, and the first outer diameter D1 is equal to the second outer diameter D2, so that the wall thickness of the sleeve connection portion 731 is less than the wall thickness of the push rod connection portion 732, which is conducive to the sleeve connection portion 731 extending into the gap between the stent 200 and the inner wall of the sheath tube 20 and then being sleeved on the outer periphery of the stent 200. In addition, since the inner diameter of the sleeve connection part 731 is not equal to the inner diameter of the push rod connection part 732, a top sleeve step 733 is formed at the connection between the two. A plurality of limiting protrusions 731 are arranged circumferentially on the inner wall of the proximal side of the stent top sleeve 73. The limiting protrusion 731 is a curved protrusion structure with a smooth appearance. When the distal end of the stent 200 is restrained in the stent top sleeve 73, at least one peak of the bare wave ring 230 on the distal side of the stent 200 will be engaged with the limiting protrusion 731. At this time, for the stent 200, its proximal side bare wave ring 220 is anchored on the anchor head 12, and the distal side bare wave ring 230 is engaged in the stent top sleeve 73, so that both ends of the stent 200 are limited, so that the stent 200 can be kept in a predetermined position during the conveying and releasing process, and the controllability of the stent 200 during its release process and the position accuracy after being released can also be improved. In this embodiment, the stent top cover 73 is made of LDPE material to ensure the flexibility of the delivery system and prevent the flexibility of the entire sheath tube 20 from being significantly reduced due to the provision of the stent top cover 73 .

[0047] See also Figure 8As shown, the stent top sleeve 73 can be fixedly connected to the distal end of the push rod 73 by glue bonding or other physical or chemical methods. Among them, the distal side of the push rod 72 has a necking portion 722, and the outer diameter of the necking portion 722 is smaller than the outer diameter of other parts of the push rod 72, so as to form a step at the distal end of the necking portion 722. When the stent top sleeve 73 is connected to the push rod 72, the stent top sleeve 73 is sleeved on the outer periphery of the necking portion 722, and the proximal end of the top sleeve step 732 abuts against the end step of the necking portion 722 to achieve the axial positioning of the stent top sleeve 73. Among them, the outer diameter of the stent top sleeve 73 is equal to the outer diameter of the push rod 72, and the outer diameter of the push rod 72 is slightly smaller than the inner diameter of the sheath 20. In this embodiment, slightly smaller means that the size of one component is within 5 mm smaller than the size of another component. For example, when the inner diameter of the sheath 20 is 6.2 mm, the outer diameter of the push rod 72 is 5.9 mm. Since the outer diameter of the push rod 72 is only slightly smaller than the sheath tube 20, when the outer diameter of the stent top sleeve 73 is equal to the outer diameter of the push rod 72, the gap between the outer periphery of the stent top sleeve 73 and the inner wall of the sheath tube 20 is very small. Therefore, the stent top sleeve 73 whose wall thickness is smaller than that of the push rod can more smoothly extend into the gap between the stent 200 and the sheath tube 20 and then be smoothly sleeved on the outer periphery of the stent 200.

[0048] See also Fig. 9 As shown, the structure of the three-way connector 74 is described. The three-way connector 74 includes a main body tube 742 and a branch tube 741 connected to the main body tube 742. A first transmission thread 7422 is arranged on the outer periphery of one side of the main body tube 741 away from the branch tube 741, and a first stopper 7421 and a second stopper 7423 are arranged at the distal end and the proximal end of the first transmission thread 7422, respectively. The first stopper 7421 and the second stopper 7423 are used to limit the adjustment knob 71 screwed on the first transmission thread 7422. When the adjustment knob 71 moves to the position of the first stopper 7421, the first stopper 7421 will abut against the adjustment knob 71 to prevent it from continuing to move in the distal direction; similarly, when the adjustment knob 71 moves to the position of the second stopper 7423, the second stopper 7423 will abut against the adjustment knob 71 to prevent it from continuing to move in the proximal direction.

[0049] See also Fig.10 As shown, the structure of the support rod 40 is described. The support rod 40 is a hollow rod-shaped structure as a whole, extending along the longitudinal axis. A support rod limiting structure 41 is provided on the periphery of the proximal side of the support rod 40. In this embodiment, the support rod limiting structure is a limiting groove structure, which is used to engage with the operating knob 70. A support rod external thread 42 is also provided on the periphery of the distal side of the support rod limiting structure 41 of the support rod 40, and the external thread 42 is used to cooperate with the front handle 30 to achieve the position adjustment of the front handle 30 on the support rod 40.

[0050] See also Figures 11A-11BAs shown, the structure of the rear handle 50 is described. The rear handle 50 as a whole is a sleeve structure with an inner cavity, and the distal end is an open end. A rear handle limiting structure 54 is provided on the outer periphery of the distal end. In this embodiment, the rear handle limiting structure is a groove structure. In this embodiment, the rear handle limiting structure 54 is composed of protrusions provided at both ends thereof, and the rear handle limiting structure 54 is formed between the two protrusions. In other embodiments, the rear handle limiting structure 54 can also be formed by an inward depression on the outer periphery of the distal end. In addition, a slide groove 53 is also provided on the distal end side of the rear handle 50. See Fig.11A As shown, the slide groove 53 is a through groove that penetrates the wall of the rear handle 50 in the radial direction so that its inner cavity is connected to the outside. The slide groove 53 extends from the distal end surface of the rear handle 50 along the axial proximal end for a certain length, and the specific length is determined by the moving stroke of the three-way connector 74. Figure 6 As shown, the rear handle 50 is sleeved on the outer periphery of the three-way joint 74, and the branch pipe 741 of the three-way joint 74 can extend from the inner cavity of the rear handle 50 through the slide groove 53. Considering that the three-way joint 74 needs to slide in the rear handle 50, the slide groove 53 is set as a long strip groove structure extending along the axis for a certain length. The slide groove 53 limits the circumferential freedom of the branch pipe 741 (cannot rotate circumferentially or can only rotate slightly) so that the branch pipe 741 can slide axially in the slide groove 53 but cannot rotate circumferentially at will, thereby ensuring that the three-way joint 74 can be driven to move axially when the adjusting knob 71 is rotated. In other embodiments, other limiting structures can also be set on the three-way joint to limit its circumferential freedom and prevent it from rotating with the adjusting knob. For example, a limiting protrusion can be set on the three-way joint, and a limiting groove extending axially and slidingly cooperating with the limiting protrusion is set in the support rod. In addition, an elastic member limiting structure 51 is also provided on the inner cavity bottom wall of the rear handle 50 at the proximal side, and a through hole 52 is also provided on the bottom wall to penetrate the bottom wall, and the through hole 52 is used for the inner sheath core 14 and the outer sheath core 13 to pass through. Exemplarily, Fig. 11B The elastic member limiting structure 51 is a protruding structure. In other embodiments, the elastic member limiting member can also be set as a groove structure, and the distal end side of the elastic member is inserted into the groove to achieve positioning of the elastic member.

[0051] See also Figures 12A-12B As shown, the structure of the adjusting knob 71 is described. The adjusting knob 71 is a cylindrical structure with a cavity inside, and a first limiting structure 712 and a second limiting structure 713 are provided at both ends of the inner wall. A second transmission thread 711 is also provided on the inner wall of the adjusting knob 71 between the first limiting structure 712 and the second limiting structure 713. The second transmission thread 711 is used to mesh with the first transmission thread 7421 on the three-way joint 74 to form a thread pair. For example, see Fig. 12AAs shown, the first limiting structure 712 and the second limiting structure 713 in this embodiment are both convex structures. In other embodiments, the first limiting structure 712 and the second limiting structure 713 may also be groove structures, or one is a convex structure and the other is a groove structure. In addition, in order to facilitate connection and installation, the adjustment knob 71 is divided into two and is provided as two, and the two are spliced ​​by a buckle 714.

[0052] Continue to see Figure 6 As shown, the adjusting knob 71 is connected between the support rod 40 and the rear handle 50, so as to connect the support rod 40 with the rear handle 50. Specifically, the first limiting structure 712 of the adjusting knob 71 located at the distal side is engaged in the support rod limiting structure 41 of the support rod 40 arranged along the circumferential direction, and the second limiting structure 713 of the proximal side of the adjusting knob 71 is engaged in the rear handle limiting structure 54 of the rear handle 50 arranged along the circumferential direction. The limiting protrusion can slide in the limiting groove along the circumferential direction but cannot move along the longitudinal axis, so that the adjusting knob 71 can rotate around the longitudinal axis relative to the support rod 40 and the rear handle but cannot move along the longitudinal axis. The adjusting knob 71 is meshed with the three-way joint 74, and the two form a thread pair. Since the adjustment knob 71 can only rotate around the longitudinal axis and cannot move, by rotating the adjustment knob 71, the three-way joint 74 can be driven to move toward the distal or proximal direction along the longitudinal axis, thereby driving the push rod 72 fixedly connected thereto to move along the longitudinal axis to adjust the distance between it and the bracket 200 and eliminate the gap between it and the bracket 200.

[0053] In other embodiments, the rear handle 50 may not be provided, and the adjusting knob 71 is only engaged with the proximal side of the support shaft 40 . In this case, the three-way joint 74 can also be driven to move along the longitudinal axis by rotating the adjusting knob 71 .

[0054] The protrusions and grooves provided on the operating knob 74, the central axis 72 and the rear handle 74 can be interchanged, as long as the three can be coupled to the operating knob 74 and can rotate around the longitudinal axis. For example, in other embodiments, the outer periphery of the distal end of the support rod 40 is provided with a protrusion structure, and / or the outer periphery of the distal end of the rear handle 50 is provided with a protrusion structure, which are respectively coupled to the first limiting structure and the second limiting structure at both ends of the adjusting knob 71.

[0055] See also Figure 6 , 13 As shown, the proximal side of the push rod 72 is connected to a seal 76 for sealing the proximal opening. In this embodiment, the seal 76 is a sleeve-shaped structure with an opening at one end, which is sleeved on the outer periphery of the proximal opening of the push rod 72. A seal flange 761 is provided on the outer periphery of the distal side of the seal 76, and an annular limit structure 763 facing the proximal side is provided on the seal flange 761. Exemplarily, Fig.13The annular limiting structure 763 in the seal 76 is an annular groove structure, and in other embodiments, it can also be set to an annular protrusion structure. In addition, a sealing through hole 762 is provided on the end wall of the seal 76 located at the proximal side. The sealing through hole 762 is used for the outer core tube 13 to pass through, and it is interference-fitted with the outer core tube 13 to seal the outer core tube 13. The distal side of the elastic member 77 is sleeved on the outer periphery of the seal 76 and abuts against the seal flange 761, and is clamped in the annular limiting structure 763; the proximal side of the elastic member 77 is sleeved on the elastic member limiting structure 51, that is, the elastic member limiting structure 51 is inserted into the proximal side of the elastic member 77. Through the above-mentioned arrangement, the two ends of the elastic member 77 are positioned to prevent the elastic member 77 from being loosened or bent during the deformation process.

[0056] In this embodiment, the elastic member 77 is always in a compressed state, thereby applying elastic force to the seal 76, so that the seal 76 is closely attached to the proximal side of the push rod 73. Considering that the movement of the push rod 72 will drive the seal 76 to move together, in order to ensure the sealing effect of the seal 76 and prevent the seal 76 from being loosely connected to the push rod 73 or loose and affecting the sealing effect, the elastic member 77 is provided in this embodiment, and the elastic member 77 is used to construct a follower structure to ensure that the seal 76 can move with the push rod 72. The follower structure of this embodiment refers to a component in the structure that moves with another component. During the entire movement process of the push rod 73, the distal end of the elastic member 77 always abuts against and applies pressure on the seal 77, thereby ensuring that the seal 77 is tightly sleeved on the outer periphery of the proximal opening of the push rod 72 to ensure its sealing performance. The seal 76 is provided to seal the proximal opening of the push rod 72 to prevent blood from entering through the distal opening of the push rod 72 and then flowing out from the proximal opening to leak into the conveyor handle 300 during surgery, thereby preventing blood leakage.

[0057] Considering that a seal 76 is provided at the proximal opening of the push rod 72, in order to realize the exhaust operation of the delivery system 100, an exhaust through hole 721 is provided on the outer periphery of the proximal side of the push rod 72, and the exhaust through hole 721 penetrates the tube wall of the push rod 72 so as to connect its inner cavity with the outside. When the push rod 72 is assembled in the three-way joint 74, the exhaust through hole 721 is aligned with the inner cavity of the branch tube 741 to connect the branch tube 741 with the inner cavity of the push rod 72. In this way, the liquid (such as saline) transported by the hose 60 can directly enter the push rod 72 through the exhaust through hole 721, and continue to move toward the distal end along the push rod 72 to reach the sheath tube 20, thereby realizing the exhaust of the air in the push rod 72 and the sheath tube 20.

[0058] In other embodiments, the follow-up structure composed of the elastic member or the like may not be provided, but the sealing member 77 may be directly fixedly connected to the push rod 73. The specific connection and fixing method may be glue bonding, hot melting or welding.

[0059] After the stent 200 is loaded in the sheath 20, the distance between the push rod 72 and the stent 200 can be adjusted by rotating the adjustment knob 71, so that the distal side of the stent 200 enters the stent top sleeve 73, thereby eliminating the gap between the stent 200 and the push rod 72. At this time, the peaks in the bare wave ring 230 on the distal side of the stent 200 will be hooked on the limiting protrusion 731 in the stent top sleeve 73, and both ends of the stent 200 are limited. When the sheath 20 reaches the predetermined position of the human body, first, the adjustment knob 71 separates the stent top sleeve 73 from the stent 200. During the separation process, due to the existence of the limiting protrusion 731, the stent top sleeve 73 will apply a pulling force to the proximal side of the stent 200, and the pulling force will pull the distal side of the stent 200, thereby stretching the stent 200 to a certain extent, thereby adjusting the distal side position of the stent 200 and eliminating the shortening or local wrinkles of the stent 200. When the pulling force is greater than a certain value, since the limiting protrusion 731 is a curved smooth protrusion, the distal bare wave ring 230 and the limit-release protrusion 731 are desulfurized, and as the stent top sleeve 73 continues to move proximally relative to the stent 200, the two will separate. Then adjust the front handle 30 to make the sheath 200 withdraw, so that the stent gradually expands from the sheath 200 and is gradually released. Finally, operate the outer core tube 13 to separate the anchor head 121 from the guide head 11, thereby releasing the proximal end of the stent 200, and then achieving the complete release of the stent 200 at the target position of the human blood vessel.

[0060] Second embodiment

[0061] The conveyor handle in this embodiment is basically the same as that in the previous embodiment, and the only difference is that the structure of the bracket top sleeve is different.

[0062] See also Fig.14 As shown, the stent top sleeve 73a in this embodiment is substantially the same as the stent top sleeve in the first embodiment. The stent top sleeve 73a in this embodiment includes a sleeve connection portion 731a arranged on the distal side and a push rod connecting portion 732a on the proximal side. Different from the first embodiment, a transition portion 734a is further arranged at the connection between the sleeve connection portion 731a and the push rod connecting portion 732a in this embodiment. The transition portion 734a is a conical structure, so that the first outer diameter D1 of the sleeve connection portion 731a is larger than the second outer diameter D2 of the push rod connecting portion 732a. Through the above arrangement, under the premise that the second outer diameter D2 is equal to the outer diameter of the push rod 72, the outer diameter of the sleeve connection portion 731a is larger than the outer diameter of the push rod 72, so that the outer wall of the sleeve connection portion 731a is closer to the inner wall of the sheath tube 200, so as to reduce the gap between the sleeve connection portion 731a and the inner wall of the sheath tube 200. Through the above arrangement, the stent top sleeve 73a can be more conveniently extended into the gap between the stent and the sheath tube and then sleeved on the outer periphery of the stent.

[0063] Third embodiment

[0064] The conveyor handle in this embodiment is basically the same as that in the previous embodiment, except that the structure of the bracket top cover is different. Fig.15 As shown, the stent top sleeve 73b in this embodiment is substantially the same as the stent top sleeve in the first embodiment, and includes a sleeve connection portion 731b arranged on the distal side and a push rod connection portion 732b on the proximal side. Different from the first embodiment, in this embodiment, the inner cavity of the sleeve connection portion 731b is a conical structure with a small proximal end and a large distal end, so that the inner cavity of the sleeve connection portion 731b is formed into a trumpet shape. The above-mentioned trumpet shape design makes the wall thickness of the sleeve connection portion 731b gradually decrease from the proximal end to the distal end until it reaches the minimum at the free end, so as to facilitate the sleeve connection portion 731b to be embedded in the gap between the stent 200 and the sheath tube 20, and then sleeved on the outer periphery of the stent 200.

[0065] In other embodiments, a plurality of guide pieces are provided at the distal end of the sleeve portion, and the plurality of guide pieces are arranged at intervals along the circumference of the sleeve portion, and the thickness of the guide pieces gradually increases from the distal end to the proximal end. Since the guide piece can be conveniently inserted into the gap between the stent and the sheath tube, the sleeve portion can be guided to smoothly enter the gap between the stent 200 and the sheath tube 20, thereby improving assembly efficiency.

[0066] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. The protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A delivery handle for delivering a vascular stent, characterized in that: include: a support rod having an inner cavity and extending along a longitudinal axis; A three-way connector, which is at least partially disposed in the inner cavity of the support rod, the three-way connector having a branch pipe and a first transmission thread disposed on the outer periphery of the distal end; A push rod, the proximal end of which passes through the inner cavity of the support rod and is fixed in the three-way joint; The adjusting knob is rotatably clamped on the outer periphery of the support rod and has a second transmission thread meshed with the first transmission thread; rotating the adjusting knob can drive the push rod to move along the longitudinal axis.

2. The conveyor handle according to claim 1, characterized in that: The distal end side of the push rod is fixedly connected with a stent top sleeve, and the stent top sleeve can be sleeved on the outer periphery of the blood vessel stent.

3. The conveyor handle according to claim 2, characterized in that: The stent top sleeve includes a sleeve portion arranged on the distal side and a push rod connecting portion on the proximal side. The sleeve portion can be sleeved on the outer periphery of the vascular stent. The push rod connecting portion is fixedly connected to the push rod. The first inner diameter of the sleeve portion is greater than the second inner diameter of the push rod connecting portion.

4. The conveyor handle according to claim 3, characterized in that: The inner wall of the sleeve portion is provided with a plurality of limiting protrusions along the circumferential direction, and the bare wave ring at the distal end of the vascular stent can be hooked on the limiting protrusions.

5. The conveyor handle according to claim 3, characterized in that: The first outer diameter of the sleeve connection portion is greater than the second outer diameter of the push rod connection portion; or, the inner cavity of the sleeve connection portion is configured as a tapered structure that gradually increases from the proximal end to the distal end, and the minimum inner diameter of the tapered structure is greater than the second inner diameter of the push rod connection portion.

6. The conveyor handle according to claim 1, characterized in that: An exhaust through hole extending in the radial direction is arranged on the outer circumference of the push rod, and the exhaust through hole is at least partially aligned with the inner cavity of the branch pipe to connect the branch pipe with the inner cavity of the push rod.

7. The conveyor handle according to claim 1, characterized in that: A rear handle is also provided on the proximal side of the support rod, a support rod limiting structure is provided on the outer periphery of the proximal side of the support rod, and a rear handle limiting structure and a penetrating slide groove are provided on the distal side of the rear handle; the rear handle is sleeved on the outside of the three-way joint and the branch pipe is slidably connected to the slide groove, and the distal side and proximal side of the inner wall of the adjusting knob are respectively provided with a first limiting structure and a second limiting structure that are clamped with the support rod limiting structure and the rear handle limiting structure.

8. The conveyor handle according to claim 7, characterized in that The proximal opening of the push rod is tightly connected with a sealing member.

9. The conveyor handle according to claim 8, characterized in that The push rod is fixedly connected to the sealing member; or, further comprises an elastic member arranged in the rear handle, wherein the elastic member is in a compressed state and its distal end abuts against the sealing member, and its proximal end abuts against the rear handle.

10. The conveyor handle according to claim 9, characterized in that A sealing flange is arranged on the outer periphery of the sealing member, an elastic member limiting structure is arranged on the bottom wall of the rear handle, the distal end of the elastic member abuts against the sealing flange, and the proximal end is sleeved on the elastic member limiting structure.

11. The conveyor handle according to claim 10, characterized in that An annular limiting structure is arranged on the sealing flange, and the distal end side of the elastic member is clamped in the annular limiting structure.

12. A conveying system, comprising the conveyor handle according to any one of claims 1 to 11, characterized in that: Also includes: A front handle, movably sleeved on the outer circumference of the support rod; A sheath tube, the proximal end of which is slidably inserted into the support rod and fixedly connected to the front handle, and the support rod is slidably inserted into the sheath tube.

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