CN210383964U

CN210383964U - Occluder delivery system with elastically deformable catch jaws

Info

Publication number: CN210383964U
Application number: CN201920611404.2U
Authority: CN
Inventors: 张瑾; 张健; 王晓舟; 马彩霞
Original assignee: Shanghai Jinkui Medical Devices Co ltd
Current assignee: Shanghai Jinkui Medical Devices Co ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-04-24
Anticipated expiration: 2029-04-29

Abstract

The utility model discloses a plugging device conveying system with elastic deformation's capture claw, including: a flexible hollow shaft having a first proximal end and a first distal end; a sleeve connected to the first distal end; the wire conveying and feeding device comprises a wire conveying and feeding device, a wire feeding device and a wire feeding device, wherein the wire conveying and feeding device is provided with a second near end and a second far end, and the wire conveying and feeding device is longitudinally arranged through the flexible hollow rod and the sleeve; the catching claw is composed of at least two catching wires, each catching wire is provided with a third near end and a third far end which are arranged oppositely, the third near end is connected with the second far end, and one section of the catching wire where the third far end is located is a deformation section; wherein the delivery wire is slidable relative to the flexible hollow rod to cause the catch pawl to enter and exit the sleeve; when the catching claw is positioned in the sleeve, the catching claw is tightened through elastic deformation to catch a connecting piece of the plugging device; when the catch is located outside the sleeve, the catch opens by elastic return for releasing the connecting piece. The matching with the occluder can be realized without screw-thread matching, and the device can be reliably used for delivering the non-screw occluder or other interventional instruments.

Description

Occluder delivery system with elastically deformable catch jaws

Technical Field

The present invention relates to an occluder delivery system, and more particularly to an occluder delivery system with elastically deformable catches for a threadless occluder or other interventional medical devices with threadless connectors.

Background

The conveying steel cable of the existing occluder conveying system mostly adopts a head end with threads, and the head end can only be used for conveying medical appliances such as occluders with threaded connectors. However, there is no well-established delivery system available in the art for non-threaded stoppers (i.e., stoppers that do not have a threaded connection) because delivery cannot be achieved with a threaded fit.

In summary, the delivery systems known in the prior art are not capable of delivering a non-threaded occluding device.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a plugging device conveying system who catches claw with elastic deformation in order to overcome the unable defect of carrying no screw thread plugging device of prior art's conveying system.

The utility model discloses an above-mentioned technical problem is solved through following technical scheme:

an occluder delivery system having an elastically deformable catch, comprising:

a flexible hollow shaft having oppositely disposed first proximal and distal ends;

a sleeve connected to the first distal end;

the wire conveying piece is provided with a second near end and a second far end which are arranged oppositely, and the wire conveying piece is longitudinally arranged through the flexible hollow rod and the sleeve;

the catching device comprises a catching claw consisting of at least two catching wires, wherein the catching wire is provided with a third near end and a third far end which are arranged oppositely, the third near end is connected with the second far end, and one section of the catching wire where the third far end is located is a deformation section;

wherein the delivery wire is slidable relative to the flexible hollow rod to cause the capture jaw to enter and exit the sleeve; when the catching claw is positioned in the sleeve, the catching claw is tightened through elastic deformation of the deformation section so as to catch a connecting piece of the occluder; when the catch is located outside the sleeve, the catch is opened by the elastic return of the deformation section for releasing the connection.

In the technical scheme, the capturing and releasing of the connecting piece are realized by utilizing the elastic deformation and the elastic recovery of the capturing claw controlled by the conveying wire, and the normal and reliable conveying of the plugging device can be realized without thread matching.

Preferably, when said catch is located within said sleeve, said deformed segments of at least two of said catch wires extend in a spread-first followed by a contraction-second direction along said third proximal end to said third distal end; at least two of the catching wires are arranged in a rotational symmetry manner.

By adopting the arrangement, the catching claw can conveniently and reliably realize catching; when the catching claw is positioned in the sleeve, the deformation section is firstly diffused and then contracted, and the contraction area can prevent the caught connecting piece from falling off.

Preferably, in the direction from the third proximal end to the third distal end, the cavity of the sleeve has a first constant diameter region, a diameter-changing transition region and a second constant diameter region in this order, the diameter of the first constant diameter region is smaller than that of the second constant diameter region, and the diameter-changing transition region and the second constant diameter region are adapted to the deformation section.

By adopting the arrangement, the diameter change transition region and the second diameter constant region can both play a role of deforming the deformation section of the catching claw; it is also possible that only one of the diameter-changing transition region and the second diameter-constant region serves to deform the deformation section of the catch pawl.

Preferably, the at least two catching filaments are 3, 4, 5 or more catching filaments.

By adopting the arrangement, the layout of the catching claw is reasonable.

Preferably, the catching wire is a steel wire.

By adopting the arrangement, the catching claw is the wire claw.

Preferably, the occluder delivery system further comprises:

the fixed seat is connected to the first near end, and the conveying wire penetrates through the fixed seat; and

an operating handle connected to the second proximal end;

wherein the operating handle is located at the near side of the fixed seat.

By adopting the arrangement, the fixing seat and the operating handle can be held by an operator such as a doctor, so that the operation is convenient.

Preferably, the occluder delivery system further comprises:

the first tightly-jacking component is rotatably arranged on the side wall of the fixed seat and is used for tightly jacking the conveying wire in the fixed seat; and

the second tightly-pushing component is sleeved on the operating handle and used for tightly pushing the conveying wire in the operating handle, and the second tightly-pushing component is rotatably arranged on the side wall of the operating handle and used for tightly pushing the conveying wire in the operating handle.

By adopting the arrangement, when the first jacking component jacks tightly, the relative positions of the wire conveying and feeding and the fixed seat are kept unchanged, so that the wire conveying and feeding can not move relative to the flexible hollow rod; when the first tightening component is loosened, the relative positions of the wire conveying and the fixed seat can be changed, so that the wire conveying can move relative to the flexible hollow rod. The second tightening part is used for fixing the conveying wire relative to the operating handle.

Preferably, the flexible hollow bar is a spring loaded steel cable.

Preferably, the flexible hollow rod, the sleeve, the wire conveying and catching claw are all made of medical materials and are selected from at least one of the following materials:

(1) metals and their alloy materials, including stainless steel, cobalt-based alloys, titanium and titanium alloys, nickel titanium alloy shape memory materials;

(2) inorganic materials including hydroxyapatite, high purity alumina ceramics;

(3) the biological inert medical polymer material comprises nylon, polyester resin, polytetrafluoroethylene, ultra-high molecular weight polyethylene, high-density polyethylene, polymethyl methacrylate, polypropylene, polycarbonate, polyurethane, organic silicon and polyacrylonitrile.

It should be noted that the material of the flexible hollow rod, the sleeve, the feeding wire and the catching claw can be selected from one or more materials in any one of the categories (1) to (3), and can also be selected from one or more materials in two or more categories (1) to (3).

On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.

The utility model discloses an actively advance the effect and lie in:

the utility model discloses a plugging device conveying system with elastic deformation's capture claw need not can realize the cooperation with the plugging device through screw-thread fit, can be used for the transport of no screw thread plugging device reliably. The delivery system can also be used for vascular plugs without threaded connectors or other medical devices for closing tissue cavities, and can be delivered as long as the delivery system can grasp the delivery system without being limited by the shape of the mechanical connector, so that innovation and change of the design of the medical devices in vivo are greatly promoted, and the delivery system is easy to manufacture, convenient to operate and safe to deliver.

Drawings

Fig. 1 is a schematic side view of a preferred embodiment of the invention of an occluder delivery system with elastically deformable catches, with the occluder shown as such.

Fig. 2 is a schematic sectional view along a-a in fig. 1.

Fig. 3 is an enlarged schematic view of a portion B in fig. 2.

Fig. 4 is a perspective view of a preferred embodiment of the capturing claw of the present invention.

Description of reference numerals:

10: occluder delivery system

110: flexible hollow rod

111: first near end

112: first far end

120: sleeve barrel

121: a first constant diameter zone

122: transition zone of varying diameter

123: second constant diameter zone

130: wire conveying and feeding device

131: second proximal end

132: second distal end

140: catching claw

141: third near end

142: third distal end

143: catching silk

150: fixed seat

151: first top tight hole

160: operating handle

161: second jacking hole

50: plugging device

51: connecting piece

Detailed Description

The present invention will be more clearly and completely described below with reference to the accompanying drawings.

This embodiment discloses an occluder delivery system having elastically deformable catches, as shown in fig. 1-4, the occluder delivery system 10 comprising: a flexible hollow rod 110, a sleeve 120, a delivery wire 130, and a catch 140. The flexible hollow shaft 110 has oppositely disposed first proximal 111 and first distal 112 ends. A sleeve 120 is attached to the first distal end 112. The delivery wire 130 has a second proximal end 131 and a second distal end 132 disposed opposite to each other, and the delivery wire 130 is longitudinally threaded through the flexible hollow shaft 110 and the sleeve 120. The catch 140 is formed by at least two catch wires 143, the catch wires 143 having oppositely disposed third proximal ends 141 and third distal ends 142, the third proximal ends 141 being connected to the second distal ends 132, and a segment of the catch wires 143 where the third distal ends 142 are located being a deformed segment.

As shown in fig. 2-3, the delivery wire 130 is slidable relative to the flexible hollow shaft 110 to move the catch 140 into and out of the sleeve 120. When the catch 140 is located in the sleeve 120 (i.e. in the state shown in fig. 2-3), the catch 140 is tightened by elastic deformation of the deformation segments for catching the connection 51 of the occluder 50. When the catch 140 is located outside the sleeve 120, the catch 140 opens for releasing the link 51 by elastic recovery of the deformed section; that is, when the catch 140 is located outside the sleeve 120, the catch 140 will be more extended relative to the state shown in fig. 2-3.

Also shown in figures 1-2 is an occluder 50 which mates with the occluder delivery system 10 of the present embodiment, as shown in the figures, the connector 51 of the occluder 50 has a section which is generally a sphere which is firmly captured by the capture claws 140.

In the above, the capturing and releasing of the connector 51 are realized by the elastic deformation and the elastic recovery of the capturing claw 140 controlled by the delivery wire 130, and the normal and reliable delivery of the occluder 50 can be realized without the screw-thread fit.

Generally, the outer diameter of the delivery wire 130 is smaller than the inner diameter of the flexible hollow shaft 110 to facilitate delivery.

As shown in connection with fig. 2-4, when the catch 140 is positioned within the sleeve 120, the deformed segments of the at least two catch wires 143 extend in a spread-first and then shrink-second manner in the direction from the third proximal end 141 to the third distal end 142; at least two catching wires 143 are arranged rotationally symmetrically.

The catching claw 140 can conveniently and reliably realize catching. Also, when the catch 140 is located within the sleeve 120, the constricted region of the catch 140 prevents the caught link 51 from falling out.

As shown in fig. 2-3, the cavity of the sleeve 120 has a first constant diameter region 121, a variable diameter transition region 122, and a second constant diameter region 123 in that order along the direction from the third proximal end 141 to the third distal end 142. The diameter of the first constant diameter region 121 is smaller than that of the second constant diameter region 123, and the diameter-varying transition region 122 and the second constant diameter region 123 are adapted to the deformation section. In this embodiment, the second constant diameter region 123 acts to deform the deformed section of the catch 140, and the diameter change transition region 122 limits the maximum distance that the deformed section can be retracted into the sleeve 120.

As shown in fig. 4, in the present embodiment, the at least two catching filaments 143 are 4 catching filaments 143. In alternative embodiments, there may be 3 or 5. The arrangement of the catch pawl 140 is reasonable. In alternative embodiments, the capturing filaments 143 may also be 6 or more. In the present embodiment, the catching wire 143 is specifically a steel wire. The catching claw 140 is a wire claw, and has the advantages of simple and reliable structure. In alternative embodiments, the catching wire may be made of other metal materials.

As shown in fig. 1-2, in this embodiment, the occluding device delivery system 10 further comprises: a fixed seat 150 and an operating handle 160. The fixing base 150 is connected to the first proximal end 111, and the wire 130 penetrates the fixing base 150. An operating handle 160 is connected to the second proximal end 131. The operating handle 160 is located proximal to the holder 150. The fixing seat 150 and the operating handle 160 can be held by an operator such as a doctor, so that the operation is convenient. The sectional dimension of the fixing base 150 is larger than that of the flexible hollow rod 110, and the sectional dimension of the operating handle 160 is larger than that of the wire 130, and they can be designed according to specific requirements, and are generally required to be convenient for normal adult to hold.

The flexible hollow bar 110 is embodied as a spring loaded steel cable. Are commercially available. The fixing base 150, the flexible hollow rod 110 and the sleeve 120 are all made of steel materials and are connected through welding.

In this embodiment, the occluding device delivery system 10 further comprises: a first tightening member (not shown, only a first tightening hole 151 for screwing the first tightening member is shown) and a second tightening member (not shown, only a second tightening hole 161 for screwing the second tightening member is shown). The first tightening member is rotatably disposed on a sidewall of the fixing base 150 and is used for tightening the conveying wire 130 in the fixing base 150. When the first tightening member is tightened, the relative positions of the feeding wire 130 and the fixing base 150 are kept unchanged, so that the feeding wire 130 does not move relative to the flexible hollow rod 110; when the first tightening member is released, the relative positions of the delivery wire 130 and the fixing base 150 may be changed, so that the delivery wire 130 can move relative to the flexible hollow rod 110. As described above, the drawing shows the first tightening hole 151 for mounting the first tightening member and the second tightening hole 161 for mounting the second tightening member, which are both threaded holes. The first tightening part and the second tightening part are tightening screws.

As shown in fig. 1-2, the operating handle 160 is sleeved on the conveying wire 130, and the second tightening member is rotatably disposed on a sidewall of the operating handle 160 and is used for tightening the conveying wire 130 inside the operating handle 160. The second tightening member is used to fix the delivery wire 130 relative to the operating handle 160. The delivery wire 130 is typically a steel wire, and the second distal end 132 of the delivery wire 130 is attached to the catch 140 by welding.

The occluding device delivery system 10 of the present embodiment may be used with various types of occluding devices 50, such as occluding devices 50 used to treat conditions requiring occlusion treatment, including atrial septal defects, patent ductus arteriosus, ventricular septal defects, patent foramen ovale, and left atrial appendage, such as occluding devices 50 made of metal or degradable materials. It will be appreciated by those skilled in the art that the present occluding device delivery system 10 may also be used for the delivery of other medical devices having similar configurations.

As will be understood in conjunction with fig. 1-4, during the transportation of the occluder 50, the first tightening member tightens against the transportation wire 130, and the catching claw 140 catches the connecting member 51 of the occluder 50; after the occluder 50 is delivered to the designated position, the first tightening member is released, the operator pushes the operating handle 160, so that the delivery wire 130 moves distally compared to the flexible hollow rod 110, the catch pawl 140 leaves the sleeve 120, the deformation section elastically recovers so that the catch pawl 140 opens, the connecting member 51 is released, and the placement of the occluder 50 is completed.

In this embodiment, the flexible hollow rod, the sleeve, the wire feeding and catching claw are all made of medical materials, specifically, nickel-titanium alloy shape memory materials. In other alternative embodiments, the flexible hollow rod, the sleeve, the transmission wire and the catching claw may be made of other metals and alloy materials thereof, such as one or more of stainless steel, cobalt-based alloy, titanium and titanium alloy, bio-inert medical polymer materials, such as one or more of nylon, polyester resin, polytetrafluoroethylene, ultra-high molecular weight polyethylene, high density polyethylene, polymethyl methacrylate, polypropylene, polycarbonate, polyurethane, organosilicon, polyacrylonitrile, and the like, and inorganic materials, such as hydroxyapatite and high purity alumina ceramic.

For some interventional medical devices, such as vascular plugs, or other medical devices that close tissue cavities, the delivery system may also be used for delivery without requiring a threaded head on the device, without being constrained by the shape of the device connector, as long as it can be grasped by the delivery system, which greatly facilitates changes in the design of the interventional device and facilitates delivery of the interventional device in the body. The conveying system is easy to manufacture, convenient to operate and safe to convey.

In describing the present invention, an embodiment may be provided with multiple figures, and reference numerals for the same components in the same embodiment are not necessarily shown in each figure; it will be appreciated by those skilled in the art that while one or more figures in an embodiment are described, they may be understood in conjunction with other figures in the embodiment; it will be understood by those skilled in the art that when no specific reference is made to which figure the text specifically corresponds, the text can be understood in conjunction with all of the figures in the embodiment.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. An occluder delivery system having an elastically deformable catch, comprising:

a sleeve connected to the first distal end;

2. The occluder delivery system of claim 1, wherein the deformed segments of at least two of the capture wires extend in a spread-first and then contracted manner in a direction from the third proximal end to the third distal end when the capture jaws are positioned in the sleeve; at least two of the catching wires are arranged in a rotational symmetry manner.

3. The occluder delivery system of claim 2, wherein the cavity of the sleeve has a first constant diameter region, a variable diameter transition region and a second constant diameter region in sequence in the direction from the third proximal end to the third distal end, the first constant diameter region having a smaller diameter than the second constant diameter region, the variable diameter transition region and the second constant diameter region being adapted to the deformation section.

4. The occluder delivery system having resiliently deformable catch pawls of claim 1 wherein the at least two catch wires are 3, 4, 5 or more catch wires.

5. The occluder delivery system with elastically deformable catches of claim 1 further comprising:

an operating handle connected to the second proximal end;

wherein the operating handle is located at the near side of the fixed seat.

6. The occluder delivery system with elastically deformable catches according to claim 5, further comprising:

7. The occluder delivery system of any one of claims 1 to 6, wherein the flexible hollow rod is a spring loaded steel cable.

8. The system of any of claims 1-6, wherein the flexible hollow shaft, sleeve, delivery wire, and catch are all made of a medical material selected from the group consisting of:

(2) inorganic materials including hydroxyapatite, high purity alumina ceramics;