CN109106484B

CN109106484B - Expandable medical support compression device

Info

Publication number: CN109106484B
Application number: CN201810866491.6A
Authority: CN
Inventors: 王媛茹; 雷荣军; 黄杭栋
Original assignee: Hangzhou Qiming Medical Devices Co ltd
Current assignee: Hangzhou Qiming Medical Devices Co ltd
Priority date: 2018-08-01
Filing date: 2018-08-01
Publication date: 2024-08-13
Anticipated expiration: 2038-08-01
Also published as: CN109106484A

Abstract

The invention provides an expandable medical stent compression device, comprising: at least two annular supporting sheets and be located the blade group between the supporting sheets, the blade group includes a plurality of blades, blade one side and a supporting sheet sliding connection, the opposite side rotates with another supporting sheet to be connected, a plurality of blades surround and form the center through-hole, the activity of blade can change the size of center through-hole to compress medical support, at least one of supporting sheets is for being provided with both with blade sliding connection's sliding connection portion and be provided with the pair supporting sheet of the rotation connecting portion of rotating connection with the blade. The compression device provided by the invention firstly reduces the number of the supporting sheets and can reduce the production cost; secondly, be equivalent to setting up a backing sheet between two sets of blade groups, thickness reduces to half promptly, and this makes compression device when compressing medical support, has improved the utilization ratio of blade compression medical support, and medical support's compression is more even, can avoid medical support local compression inhomogeneous problem.

Description

Expandable medical support compression device

Technical Field

The invention relates to the technical field of medical equipment, in particular to an expandable medical support compression device.

Background

Medical stents, such as vascular stents, prosthetic heart valve stents, etc., are widely used in clinical medicine, which enter the interior of a human lumen through a catheter and support the lesion site of the human lumen to achieve treatment. Medical stents are typically cut from a nickel-iron alloy stent having a shape memory function or a stainless steel material, for example, having an expanded state when released and a compressed state when delivered.

Before use, the larger-sized medical stent is compressed and loaded into a corresponding catheter delivery system (different types and sizes of catheter delivery systems can be selected according to the different types and sizes of the medical stent), and the catheter delivery system usually enters an implantation position in a human body along the lumen of the human body. Taking an aortic valve stent as an example, the compressed aortic valve stent is loaded into a loading section of a catheter delivery system, and then guided by a guide wire, and the catheter delivery system enters an aortic valve position through femoral artery, descending aorta and aortic arch of a human body to realize replacement of the aortic valve.

The current compression devices for compressing medical stents are generally relatively bulky and expensive to manufacture, and although they can be used several times, they have problems of inconvenient carrying and complicated sterilization procedures before use.

Disclosure of Invention

In view of the foregoing, there is a need for an improved expandable medical stent compression device that is relatively small in size and relatively inexpensive to manufacture.

The invention provides an expandable medical stent compression device, comprising: at least two annular supporting plates and be located the blade group between the supporting plates, the blade group includes a plurality of blades, blade one side and a supporting plate sliding connection, opposite side and another supporting plate rotate to be connected, a plurality of blades surround and form central through-hole, the activity of blade can change the size of central through-hole to compress medical support, at least one of supporting plates be provided with both with blade sliding connection's sliding connection portion and be provided with the duplex supporting plate of blade rotation connection's rotation connecting portion.

Further, the rotary connecting part on the duplex supporting piece is a shaft hole, and the sliding connecting part is a sliding groove.

Further, the length direction of each sliding connection part is the radial direction of the corresponding supporting piece.

Further, the rotary connecting parts and the sliding connecting parts on the duplex supporting sheets are arranged at intervals around the centers of the corresponding supporting sheets.

Further, the center of the rotary connecting part is positioned on the circumference taking the center of the supporting sheet as the center of a circle; and/or the center of the sliding connection part is positioned on the circumference taking the center of the supporting sheet as the center of a circle.

Further, the blade assembly further comprises a supporting seat, and the supporting sheet and the blade assembly are accommodated in the supporting seat.

Further, each supporting sheet comprises a handle, and the handles are convexly arranged on the periphery of the corresponding supporting sheet.

Further, the device further comprises a fixed operation part and a movable operation part, wherein the fixed operation part is connected with one of the at least two supporting sheets, the movable operation part is connected with the other of the at least two supporting sheets, the fixed operation part can fix the position of the corresponding supporting sheet relative to the supporting seat, and the movable operation part can drive the corresponding supporting sheet to rotate relative to the other supporting sheet so as to change the size of the central through hole.

Further, the movable operation part is slidably connected with the supporting seat, and/or the fixed operation part is in clamping connection with the supporting seat.

Further, a part of the periphery of the supporting seat is arc-shaped, and the movable operation part is connected with the supporting seat and can slide along the arc shape of the supporting seat.

Further, the supporting seat comprises a base and a frame connected with the base, the base and the frame enclose a containing space for containing the supporting sheet and the blade group together, and the supporting sheet and the blade group are arranged in the containing space.

Further, the base is provided with a limiting groove corresponding to the supporting pieces, the side edge of each supporting piece is inserted into the limiting groove, and the limiting groove limits the axial movement of the corresponding supporting piece.

Further, the base is provided with a liquid outlet, and the liquid outlet is used for discharging liquid in the accommodating space.

Further, the frame is provided with a placement opening which is communicated with the accommodating space and penetrates through two opposite side surfaces of the frame, and the central through hole is aligned with the placement opening.

Further, each blade is arc-shaped, and a plurality of arc-shaped blades are sequentially overlapped along the circumferential direction and mutually staggered by a preset radian.

Further, each of the blades is disposed obliquely with respect to a central axis of the central through hole.

Further, each of the blades is inclined at an angle ranging from 0 to 5 degrees with respect to the central axis of the central through hole.

Further, the blades arranged on two sides of the duplex supporting piece are mirror images of each other.

Further, the movement directions of the blades arranged on the two sides of the duplex supporting piece are opposite.

Further, a rotating shaft which can be in running fit with the supporting piece is arranged on one side of the blade, and a sliding block which can be in sliding fit with the supporting piece is arranged on the other side of the blade.

Further, at least one first stopping part is convexly arranged on the side surface or the top of the rotating shaft, and the first stopping part is matched with the corresponding supporting piece or the duplex supporting piece to limit the rotating shaft to be separated from the corresponding supporting piece.

Further, the number of the first stopping parts is two, and the two first stopping parts are symmetrically arranged on the side surface of the rotating shaft in a protruding mode relative to the central axis of the rotating shaft.

Further, the rotation connecting portion is a shaft hole, and an avoidance groove for avoiding the first stopping portion is formed in the inner wall of the shaft hole.

Further, a second stopping part is convexly arranged on the side surface or the top of the sliding block, and the second stopping part is matched with the sliding connection part to limit the sliding block to be separated from the corresponding supporting piece.

Further, the second stop portion is an annular flange.

Further, the sliding connection portion is a sliding groove, a stop bar is convexly arranged on the inner wall of the sliding groove, and the stop bar is matched with the second stop portion to limit the sliding block to be separated from the corresponding supporting piece.

Further, the surface of the blade, which is contacted with the medical support, is an arc-shaped concave surface, and the arc-shaped concave surface encloses the central through hole.

Further, the contact surface of the blade and the medical support is a semicircular cambered surface.

The compression device provided by the invention firstly reduces the number of the supporting sheets and can reduce the production cost; secondly, only one supporting piece needs to be arranged between the two blade groups, namely the thickness is reduced to be half, so that the utilization rate of the blade compressed medical support is improved when the medical support is compressed by the compression device, the compression of the medical support is more uniform, and the problem of partial compression non-uniformity of the medical support can be avoided.

Drawings

Fig. 1 is a schematic structural diagram of a compression device in embodiment 1 of the present invention.

Fig. 2 is an exploded view of the compression device of fig. 1.

Fig. 3 is an exploded view of the compression device of fig. 2 from another perspective.

Fig. 4 is an exploded view of the support sheet and the fixed and movable operating parts.

Fig. 5 is a schematic structural view of the support sheet shown in fig. 1.

Fig. 6 is a schematic view of the compression device shown in fig. 1, with a part of the structure omitted.

Fig. 7 is a schematic view showing the structure of a blade in embodiment 1 of the present invention.

Fig. 8 is a schematic view of a structure in which two blades are attached to one support sheet.

Fig. 9 is a schematic view of a structure in which a blade is attached to a supporting sheet.

Fig. 10 is a diagram of the movement trace of the blade on the support plate.

Fig. 11 is a view showing an operation state of the medical stent compressed by the five supporting plates and the four blade group.

Fig. 12 is a view showing an operation state when the medical stent is compressed by the blade group.

Fig. 13 is a schematic view of the structure of the compression device in the first operating state.

Fig. 14 is a schematic view of the structure of the compression device in the second operating state.

Fig. 15 is a schematic view of the structure of the compression device in the third operating state.

Fig. 16 is a schematic structural view of embodiment 2 in which all of the five support plates are not double support plates.

Fig. 17 is a schematic structural view of three support plates in embodiment 3 of the present invention.

Fig. 18 is an exploded view of the three support tabs shown in fig. 17.

Fig. 19 is a schematic view showing the structure of two support plates in embodiment 4 of the present invention.

Fig. 20 is an exploded view of the two support tabs shown in fig. 19.

Fig. 21 is a schematic view showing the structure of a blade in embodiment 5 of the present invention.

Fig. 22 is a schematic structural view of a supporting sheet in embodiment 5 of the present invention.

Fig. 23 is a schematic view showing a structure in which a blade is mounted on a supporting sheet in embodiment 5 of the present invention.

Fig. 24 is a schematic view showing the structure of a blade in embodiment 6 of the invention.

Fig. 25 is a schematic structural view of a supporting sheet in embodiment 6 of the present invention.

Description of the main reference signs

The invention will be further illustrated by the following specific examples in conjunction with the above-described figures.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is noted that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

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

Example 1:

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram of a compression device 100 according to an embodiment 1 of the present invention, fig. 2 is an exploded schematic diagram of the compression device 100 shown in fig. 1, and fig. 3 is an exploded schematic diagram of the compression device 100 shown in fig. 2 from another perspective. The compression device 100 is used for compressing a medical stent, and compressing the volume of the medical stent to a predetermined range, so that the medical stent can be transported to the lumen of a human body or an animal body in a smaller volume, thereby achieving the effect of minimally invasive treatment. The medical stent is supported in the lumen of a human body or an animal body after reaching a deployment point by self-inflation or balloon expansion.

It will be appreciated that the compression device 100 is not limited to being capable of compressing vascular stents, prosthetic heart valves, occlusion implants, etc. used in the cardiovascular field, and in other embodiments, the compression device 100 may be used with medical stents supported in other areas such as the esophagus, intestine, etc. as long as the medical stents having radial dimensional changes are compressed using the compression device 100 provided by the present invention.

The compression device 100 comprises a supporting seat 10, at least two annular supporting sheets 20 and a blade set 30 positioned between the two annular supporting sheets 20, wherein the supporting sheets 20 and the blade set 30 are contained in the supporting seat 10, the blade set 30 comprises a plurality of blades 31, one side of each blade 31 is slidably connected with one supporting sheet 20, the other side of each blade 31 is rotatably connected with the other supporting sheet 20, the plurality of blades 31 surround to form a central through hole 32 for compressing a medical support, and the size of the central through hole 32 can be changed by the movement of the plurality of blades 31.

The supporting seat 10 is used for accommodating the supporting plate 20 and the blade set 30, the supporting plate 20 is used for supporting the blade set 30 and driving the blade set 30 to act, and the blade set 30 is used for compressing the medical support. The plurality of blades 31 in the blade set 30 move under the driving of the supporting sheets 20 at two sides, and the size of the central through hole 32 formed by surrounding is changed, so that the medical support accommodated in the central through hole 32 can be compressed under the extrusion of the inner side surface of the blade 31 and the volume of the medical support is reduced, and the compression process of the compression device 100 on the medical support is completed.

The support base 10 includes a base 11 and a frame 12 connected to the base 11, wherein the base 11 and the frame 12 together define a receiving space 13 for receiving the support sheet 20 and the blade assembly 30, and the support sheet 20 and the blade assembly 30 are disposed in the receiving space 13.

The base 11 includes a substrate 111 and a fixing frame 112 disposed on the substrate 111, the substrate 111 is used for fixing and carrying the fixing frame 112, and the fixing frame 112 is used for fixing the supporting plate 20.

The fixing frame 112 has an arc opening to match the annular shape of the supporting plate 20, a plurality of limiting grooves 113 corresponding to the supporting plates 20 are formed in the fixing frame 112, the side edge of each supporting plate 20 is inserted into one limiting groove 113, and the fixing frame 112 limits the axial movement of the supporting plate 20 embedded therein through the limiting groove 113.

In this embodiment, the limiting grooves 113 are formed along the central axis direction of the vertical supporting plate 20, and the plurality of limiting grooves 113 are parallel to each other and are arranged at intervals; the number of the limit grooves 113 is five to match with the five support pieces 20 in the present embodiment. It should be understood that, in other embodiments, the opening direction and the arrangement mode of the limiting slot 113 may take other forms besides the above, as long as the plurality of supporting sheets 20 can be respectively embedded into the limiting slot 113; the number of the limit grooves 113 may be two, three, four, or more than five, as long as the number of the limit grooves 113 matches the number of the support pieces 20 or the number of the limit grooves 113 is greater than the number of the support pieces 20.

In this embodiment, the base plate 111 is a rectangular flat plate, and the base plate 111 is configured as a flat plate capable of more stably carrying the compression device 100. It will be appreciated that in other embodiments, the substrate 111 may be configured in other shapes than a flat plate, such as a curved plate; preferably, the shape of the base plate 111 matches the shape of the external support surface carrying the compression device 100 to improve the placement stability of the compression device 100.

In this embodiment, the limiting groove 113 penetrates through the base plate 111, and after the supporting plate 20 is installed on the compression device 100, the bottom of the supporting plate 20 is all immersed into the limiting groove 113, so that the height of the whole compression device 100 is effectively reduced; especially when the medical support needs to be compressed in liquid environments such as ice water mixed liquid, the bottoms of the supporting plates 20 are all sunk into the limiting grooves 113, so that the height of the ice water mixed liquid needing to be arranged can be effectively reduced, the requirements on the total amount of the ice water mixed liquid and other liquid are reduced, and cost loss is reduced.

In this embodiment, considering that a part of the medical support needs to complete the compression process in a liquid environment such as ice water mixed solution, the base plate 111 of the base 11 is correspondingly provided with the liquid outlet 114, the limiting groove 113 is mutually communicated with the liquid outlet 114, that is, the bottom of the annular limiting groove 113 penetrates through the base plate 111 to form the liquid outlet 114, and the liquid outlet 114 is used for discharging the liquid contained in the containing space 13, so that the liquid is prevented from remaining in the containing space 13, the compression device 100 is convenient to clean, and the use convenience of the compression device 100 is improved; the liquid discharge port 114 in this embodiment includes five square through holes (not numbered) which are arranged in parallel at intervals, and the liquid contained in the containing space 13 is discharged out of the compression device 100 through the five square through holes.

It will be appreciated that in other embodiments, the liquid discharge ports 114 may be opened in other manners than those described above, and the number of liquid discharge ports 114 may be other than five, so long as the liquid discharge ports 114 can discharge liquid; of course, when the compression device 100 is not used in a liquid environment, the drain 114 may be omitted.

The frame 12 is arranged on the base 11, the frame 12 is provided with a placement opening 121 which is communicated with the accommodating space 13 and penetrates through two opposite side surfaces of the frame 12, the placement opening 121 is communicated with a central through hole 32 surrounded by the blade group 30 and is aligned, and the placement opening 121 is used for allowing a medical support to penetrate through the frame 12, so that the medical support can conveniently enter the central through hole 32. The placement opening 121 is aligned with the central through hole 32, so that an operator can conveniently extend the medical support into the central through hole 32, and the convenience of operation is improved.

Preferably, the placement port 121 is also rounded in shape to match the central through hole 32 and the cylindrical shape of the medical stent. It will be appreciated that in other embodiments, the placement port 121 may take shapes other than circular, so long as the placement port 121 is capable of performing the function of allowing the medical stent to enter the central throughbore 32.

Part of the periphery of the frame 12 is arc-shaped, a fixed operation part 14 and a movable operation part 15 are arranged on the arc-shaped side surface of the frame 12, the fixed operation part 14 is arranged on the frame 12, and the movable operation part 15 is movably arranged on the frame 12; the arc-shaped side surface of the frame 12 is provided with a notch (not numbered) for avoiding the movement of the movable operation part 15, so that the movable operation part 15 can slide along the arc-shaped side surface of the frame 12.

In the present embodiment, the fixed operation portion 14 is fixedly connected to the frame 12 by a snap-fit connection, and the movable operation portion 15 is movably provided to the frame 12 by a slide connection, and at this time, the movable operation portion 15 can slide with respect to the arc-shaped side surface of the frame 12 using the arc-shaped side surface as a moving rail.

It will be appreciated that in other embodiments, the fixing operation portion 14 and the frame 12 may be fixed to each other by other connection methods such as embedded connection, threaded connection, etc.; the movable operating portion 15 may be moved relative to the frame 12 by screw-threaded engagement or the like.

The movable operation portion 15 is used as a part where an operator directly operates the compression device 100, so that the operation convenience of the compression device 100 can be improved, and the problem that the operator directly operates the support piece 20 with a flat shape and is difficult to operate can be avoided. The movable operation part 15 adopts a sliding connection mode, so that the movable operation part 15 has small friction resistance when moving, and the operation performance of the movable operation part 15 is further improved. In addition, the side surface of the frame 12 contacting the movable operating portion 15 is provided with an arc shape, so that the running track of the movable operating portion 15 is adjusted to be an arc shape, the operation feel is improved, and the operation process of the compression device 100 is smoother.

Referring to fig. 4 together, fig. 4 is an exploded schematic view of the supporting plate 20, the fixed operating portion 14 and the movable operating portion 15, wherein the fixed operating portion 14 is connected with a portion of the supporting plate 20, and the portion of the supporting plate 20 connected with the fixed operating portion 14 is named as a fixed supporting plate 141; the movable operation part 15 is connected with the rest part of the supporting sheets 20, the part of the supporting sheets connected with the movable operation part 15 is named as a movable supporting sheet 151, and the movable operation part 15 can drive the movable supporting sheet 151 to rotate relative to the fixed supporting sheet 141 by moving relative to the frame 12, so that the blades 31 in the blade group 30 are driven by the supporting sheets 20 to change the size of the central through hole 32 formed by surrounding.

The central axis of each supporting piece 20 approximately coincides with each other, a group of blades 30 is arranged between every two supporting pieces 20, the fixed supporting pieces 141 connected to the fixed operation part 14 and the movable supporting pieces 151 connected to the movable operation part 15 are arranged at intervals, that is, one movable supporting piece 151 is clamped between every two fixed supporting pieces 141, and one fixed supporting piece 141 is clamped between every two movable supporting pieces 151.

Referring to fig. 5, fig. 5 is a schematic structural diagram of the supporting plate 20 shown in fig. 1, the supporting plate 20 is substantially annular, and a sliding connection portion 21 slidably connected to one of the blades 31 and a rotating connection portion 22 rotatably connected to the other blade 31 are disposed on the supporting plate 20, i.e. the supporting plate 20 is a dual supporting plate. The sliding connection portion 21 is used for sliding one blade 31 of the blade set 30 on the supporting plate 20, and the rotating connection portion 22 is used for rotating the other blade 31 of the blade set 30 relative to the supporting plate 20. In the present embodiment, the sliding connection portion 21 is a sliding slot 211, the rotating connection portion 22 is a shaft hole 221, and both the sliding slot 211 and the shaft hole 221 penetrate through two end surfaces of the supporting plate 20; because the supporting sheet 20 adopts the sliding grooves 211 and the shaft holes 221 to respectively realize sliding connection and rotating connection with the blades 31, the supporting sheet 20 needs less solid materials in the manufacturing processes of casting, three-dimensional printing and the like, and the cost is relatively reduced.

It will be appreciated that in other embodiments, the sliding connection portion 21 may be connected to the blade 31 by sliding rails, and the rotating connection portion 22 may be connected to the blade 31 by a ball.

In this embodiment, the sliding groove 211 is formed along the radial direction of the annular supporting plate 20, that is, the extending direction of the sliding groove 211 is the radial direction of the supporting plate 20, at this time, the sliding direction of each blade 31 is consistent with the sliding track formed by the sliding groove 211, the contact force between the two sides of the sliding groove 211 along the length direction and the blade 31 is relatively smaller, the sliding friction force of the blade 31 in the sliding groove 211 is smaller, and the sliding of the blade 31 is smoother.

Of course, other opening methods of the sliding groove 211 may be adopted, as long as the sliding groove 211 can guide the sliding of the vane 31. It is understood that, since the number of the blades 31 is plural, the number of the sliding grooves 211 and the shaft holes 221 is plural.

In this embodiment, the sliding grooves 211 and the shaft holes 221 are spaced from each other around the center of the annular supporting plate 20. Further, the center of each sliding slot 211 is located on a circumference centered on the center of the supporting plate 20; and/or, the center of each shaft hole 221 is located on a circumference centered on the center of the support piece 20. At this time, each sliding slot 211 has the same opening position in the radial direction of the annular supporting plate 20, each shaft hole 221 has the same opening position in the radial direction of the annular supporting plate 20, and the sliding slot 211 and the shaft hole 221 have symmetry.

When the number of the sliding grooves 211 and the shaft holes 221 is even, the sliding grooves 211 and the shaft holes 221 have an axisymmetric relation with respect to the center of the supporting plate 20, and the shaft holes 221 also have an axisymmetric relation with respect to the center of the supporting plate 20, wherein the axisymmetric relation refers to that the sliding grooves 211 and the shaft holes 221 are completely symmetric on both sides of the supporting plate 20 around a symmetry axis passing through the center of the supporting plate; when the number of the sliding grooves 211 and the shaft holes 221 is an odd number, the sliding grooves 211 and the shaft holes 221 have a central symmetry with respect to the center of the supporting plate 20, and the shaft holes 221 also have a central symmetry with respect to the center of the supporting plate 20, wherein the central symmetry refers to that the sliding grooves 211 and the shaft holes 221 can overlap with the original shape after rotating 180 ° around the center of the supporting plate 20.

The symmetry relationship of the sliding groove 211 and the shaft hole 221 makes the supporting plate 20 have higher structural symmetry, the symmetrical design reduces the alignment and installation time of the supporting plate 20 and the blade 31, the supporting plate 20 can be buckled with the blade 31 relatively easily, the assembly process between the supporting plate 20 and the blade 31 is relatively convenient, and the use is more convenient.

It should be understood that the present invention is not limited to the above arrangement of the plurality of sliding grooves 211 and the plurality of shaft holes 221, and in other embodiments, the plurality of sliding grooves 211 and the plurality of shaft holes 221 may be formed on the supporting plate 20 in other manners besides the symmetrical structure.

The support piece 20 includes a handle portion 23, the handle portion 23 is protruded on the periphery of the support piece 20, and the support piece 20 is connected to the fixed operation portion 14 or the movable operation portion 15 through the handle portion 23. Part of the supporting pieces 20, namely the fixed supporting pieces 141 named above, are embedded in the fixed operation part 14 through the handle parts 23 protruding from the fixed supporting pieces, so that the fixed connection with the fixed operation part 14 is realized; the rest of the support plate 20, namely the movable support piece 151 named above, is embedded in the movable operating portion 15 through the handle portion 23 protruding from itself, thereby achieving a fixed connection with the movable operating portion 15.

Preferably, the center of the arc-shaped side surface provided on the frame 12 coincides with the center of the supporting plate 20, so that the handle 23 can keep stable with the movable operation part 15 in the rotation process, and the change of the distance between the handle 23 and the movable operation part 15 is avoided, so that the handle 23 continuously extends or retreats in the radial direction of the supporting plate 20 in the movable operation part 15, and the stability and reliability of the compression device 100 are improved.

The sliding of the movable operating portion 15 along the arc-shaped side surface of the frame 12 drives the handle portion 23 of the supporting piece 20 to move, the handle portion 23 drives the movable supporting piece 151 to rotate relative to the fixed supporting piece 141, and the relative rotation between two adjacent supporting pieces 20 enables the blade set 30 arranged between the two supporting pieces 20 to follow the movement, so that the size of the central through hole 32 surrounded by the plurality of blades 31 is changed.

Referring to fig. 6 and 8 together, fig. 6 is a schematic structural diagram of the compression device 100 shown in fig. 1, fig. 7 is a schematic structural diagram of the vane 31 in embodiment 1 of the present invention, and fig. 8 is a schematic structural diagram of two vanes 31 connected to one supporting plate 20. Each of the blades 31 is arc-shaped, and a plurality of arc-shaped blades 31 are sequentially stacked in a circumferential direction and are staggered by a predetermined angle from each other.

In the present embodiment, each of the blade groups 30 includes six blades 31. It will be appreciated that in other embodiments, other suitable numbers of blades 31 than six may be employed per set of blades 30.

One end of the vane 31 is rotatably connected to one support piece 20, the other end is slidably connected to the other support piece 20, and the vane 31 is disposed obliquely with respect to the central axis of the central through hole 32. The blades 31 are obliquely arranged relative to the central axis of the central through hole 32, so that the installation and operation of the blades 31 can be facilitated, the sliding friction between the blades 31 and the supporting sheet 20 is reduced, and the service life is correspondingly prolonged.

Preferably, the angle range of inclination of the blades 31 with respect to the central axis of the central through hole 32 is set to 0 ° to 5 °, and the thickness of the plurality of blades 31 after stacking is not greatly increased while ensuring a relatively low sliding friction of the blades 31.

The side surfaces of the blades 31 for compressing the medical stent, that is, the surfaces in contact with the medical stent are arc concave surfaces, and the arc concave surfaces of the blades 31 are mutually matched and enclose a central through hole 32 for compressing the medical stent. The compression contact surface is set to be an arc concave surface, so that the arc-shaped appearance of the medical support can be matched well, and the effective contact area of the central through hole 32 and the medical support is increased.

Preferably, the surface of the blade 31, which is in contact with the medical stent, is a semicircular cambered surface, and at this time, the blade 31 can be better matched with the cylindrical medical stent, so that the compression effect on the cylindrical medical stent is improved.

It will be appreciated that the arc concave surface provided on the blade 31 may take other shapes other than a semicircular arc surface, and the surface of the blade 31 contacting the medical stent may take other shapes such as a convex surface, a plane surface, etc., as long as a plurality of blades 31 can enclose a channel for compressing the medical stent.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a blade 31 connected to a supporting plate 20, and preferably, in the installed state (i.e. before the blade is not operated), an inner arc of the blade 31 overlaps an inner arc of the supporting plate 20, namely: the inner arc of the vane 31 has the same radius as the inner arc of the support piece 20 with the center of the support piece 20 as the center of the circle.

Referring to fig. 10, fig. 10 is a diagram illustrating a movement trace of the blade 31 on the supporting plate 20. Preferably, when the blade group 30 has six blades 31, the blades 31 are designed to have an arc-shaped structure of 180 °, and the effective opening area formed by the six blades 31 is the largest. It should be noted that 180 ° herein means that in the installed state of the blade 31 (before the blade does not work), the center of the supporting plate 20 is taken as the center of the circle, and the central angles corresponding to the two end points of the inner arc line of the blade 31, that is, the central angles corresponding to the inner arc line of the blade 31 at this time, are 180 °.

When the central angle corresponding to the inner arc of the vane 31 is smaller than 180 °, the movement of the slider 313 on the vane 31 in the chute 211 is represented as: moving toward the center of the support sheet 20, and then moving away from the center of the support sheet 20, the effective opening area enclosed by the six blades is relatively small. Moreover, since the slider 313 has a change in the movement direction in one stroke, the movement accuracy of the slider 313 is also relatively lowered.

Therefore, when the optimum degree of the central angle corresponding to the inner arc of the vane 31 is 180 °, the effective opening area of the vane 31 is maximum.

Fig. 8 illustrates a structure in which two opposite blades 31 are located at both sides of the support sheet 20, in which one blade 31 is rotatably coupled to the support sheet 20 and the other blade 31 is slidably coupled to the support sheet 20. The two blades 31 connected to the support plate 20 are mirror images of each other and the two blades 31 have opposite directions of movement when actuated.

Each blade 31 comprises a first end 311 and a second end 312 opposite the first end 311, the first end 311 being in rotational connection with one of the at least two support tabs 20 and the second end 312 being in sliding connection with the other of the at least two support tabs 20.

In the present embodiment, in order to improve the transmission stability and smoothness between the blades 31 and the supporting plate 20, the second end 312 of each blade 31 is provided with a sliding block 313 slidably engaged with the sliding connection portion 21 of the supporting plate 20, and the sliding block 313 is embedded in the sliding slot 211 of the supporting plate 20; the other side surface of the blade 31, i.e. the first end 311, is provided with a rotating shaft 314 rotatably engaged with the rotating connection portion 22 of the other supporting plate 20, and at this time, the rotating shaft 314 penetrates through the shaft hole 221 of the supporting plate 20. The sliding connection between the vane 31 and the supporting plate 20 is realized through the cooperation between the sliding block 313 and the sliding groove 211, and the rotational connection between the vane 31 and the other supporting plate 20 is realized through the cooperation between the rotating shaft 314 and the shaft hole 221, so that the vane 31 and the supporting plate 20 have relatively higher cooperation stability and smoothness, and the reliability of the compression device 100 is correspondingly improved.

It should be understood that the vane 31 is not limited to the sliding connection and the rotating connection with the supporting plate 20 only by the sliding block 313 and the shaft hole 221, and in other embodiments, the vane 31 may also be connected with the supporting plate 20 by other structures than the above, so long as the structures can be adapted to the structures adopted by the sliding connection portion 21 and the rotating connection portion 22 on the supporting plate 20.

Referring to fig. 11 and 15, fig. 11 is a working state diagram of the five supporting plates 20 and the four blade sets 30 when compressing the medical stent, fig. 12 is a working state diagram of the one blade set 30 when compressing the medical stent, fig. 13 is a schematic structural diagram of the compressing device 100 in the first working state, fig. 14 is a schematic structural diagram of the compressing device 100 in the second working state, and fig. 15 is a schematic structural diagram of the compressing device 100 in the third working state.

The sliding of the movable operating part 15 along the arc-shaped side surface of the frame 12 drives the handle 23 of the movable supporting plate 151 to move, at this time, the movable supporting plate 151 rotates relative to the fixed supporting plate 141, and the two adjacent supporting plates 20 rotate relatively, so that the blade group 30 arranged between the two supporting plates 20 follows the movement; the first end 311 of each blade 31 provided with the rotating shaft 314 rotates around the second end 312 provided with the sliding block 313, so that the size of the central through hole 32 formed by surrounding the plurality of blades 31 changes along with the rotation of the blades 31; when the size of the central through hole 32 becomes smaller, the volume of the medical stent becomes smaller under the compression of the blade 31, thereby achieving a compressed state at the time of delivery.

Referring to fig. 4 again, fig. 4 illustrates a structure in which all of the five support plates in the present embodiment are double support plates, in the present embodiment, the number of support plates 20 is five, including three fixed support plates 141 and two movable support plates 151, and at this time, the five support plates 20 are double support plates.

It will be appreciated that the number of support tabs 20 is not limited to five in the above-described embodiments. In other embodiments, the number of the supporting sheets 20 may be two, three, four or more than five; when the number of the support pieces 20 is two, the number of the blade groups 30 is one; when the number of the support pieces 20 is three, the number of the blade groups 30 is two; when the number of the support pieces 20 is four, the number of the blade groups 30 is three, and so on, the description thereof will not be repeated here.

Example 2:

Referring to fig. 16, fig. 16 is a schematic structural diagram of embodiment 2 in which all the five support plates 20 are not duplex support plates, and when the number of support plates 20 is five, only one of the two outermost support plates 20 is required to provide a pivot for the adjacent blade group 30, that is, only the rotation connection portion 22 is required to be provided for the support plate 20; the other of the two outermost support plates 20 need only provide a sliding track for the adjacent blade group 30, i.e. the support plate 20 need only be provided with a sliding connection 21. At this time, the two outermost support pieces 20 are single support pieces, and the remaining three support pieces 20 are double support pieces.

Example 3:

referring to fig. 17 and 18, fig. 17 is a schematic structural diagram of three support plates 20 in embodiment 3 of the present invention, and fig. 18 is an exploded schematic diagram of three support plates 20 shown in fig. 17, wherein the number of blade sets 30 is two, and the three support plates 20 are all duplex support plates.

Of course, the two outermost support plates 20 in the present embodiment may be single-linked support plates, i.e. one of the support plates 20 provides a pivot point for the adjacent blade group 30, i.e. the support plate 20 is only provided with a rotation connection portion 22; the other support piece 20 provides a sliding track for the adjacent blade group 30, i.e. the support piece 20 only needs to be provided with a sliding connection 21.

Example 4:

referring to fig. 19 to 20, fig. 19 is a schematic structural view of two support plates 20 in embodiment 4 of the present invention, and fig. 20 is an exploded schematic view of two support plates 20 shown in fig. 19, wherein the number of the blade sets 30 is one, one of the two support plates 20 is a duplex support plate, and the other is a simplex support plate.

It can be appreciated that the support plates 20 employed in the compression device 100 may be configured as dual support plates, so as to improve interchangeability of the support plates 20, reduce mold opening and installation costs, and improve structural versatility of the compression device 100.

In other embodiments, when the number of the support plates 20 is an odd number of three or more, the two outermost support plates 20 may be single-link support plates, and only one of the two outermost support plates 20 needs to provide a pivot for the adjacent blade group 30, that is, the support plate 20 only needs to be provided with the rotation connection portion 22; the other of the two outermost support pieces 20 need only provide a sliding track for the adjacent blade group 30, i.e. the support piece 20 need only be provided with a sliding connection 21; the rest of the support sheets 20 between the two outermost support sheets 20 are all duplex support sheets;

When the number of the support pieces 20 is an even number of four or more, the two support pieces 20 at the outermost side may be single-link support pieces, and the two support pieces 20 at the outermost side only need to provide a rotation fulcrum for the adjacent blade group 30, that is, the support pieces 20 only need to be provided with a rotation connection part; or, the two outermost support pieces 20 need only provide a sliding track for the adjacent blade group 30, that is, the support pieces 20 need only be provided with sliding connection portions; while the rest of the support plates 20 between the two outermost support plates 20 are all duplex support plates.

Example 5:

Referring to fig. 21 to 23, fig. 21 is a schematic structural view of the blade 31 in embodiment 5 of the present invention, fig. 22 is a schematic structural view of the supporting plate 20 in embodiment 5 of the present invention, and fig. 23 is a schematic structural view of the blade 31 mounted on the supporting plate 20 in embodiment 5 of the present invention. In order to further improve the reliability and stability of the compression device 100, the rotating shaft 314 is further provided with at least one first stop portion 315, and the first stop portion 315 is configured to limit the relative position of the rotating shaft 314 in the shaft hole 221, so as to prevent the rotating shaft 314 from being separated from the supporting plate 20.

In this embodiment, the first stopping portions 315 are protruding on the side surface of the rotating shaft 314, and the number of the first stopping portions 315 is two, and the two first stopping portions 315 are symmetrical about the central axis of the rotating shaft 314.

It can be appreciated that, due to the arrangement of the first stopping portion 315 on the rotating shaft 314, the shaft hole 221 matched with the rotating shaft 314 is correspondingly provided with the avoiding groove 222, the avoiding groove 222 is formed on the side surface of the shaft hole 221, the avoiding groove 222 is communicated with the shaft hole 221, and the avoiding groove 222 is used for avoiding the first stopping portion 315 protruding from the rotating shaft 314, so that the rotating shaft 314 can be smoothly embedded into the shaft hole 221.

After the rotating shaft 314 passes through the avoidance groove 222, the two first stopping portions 315 abut against the side surfaces of the supporting sheet 20, so that the relative position of the rotating shaft 314 on the supporting sheet 20 is limited, and the anti-falling performance and the structural stability of the rotating shaft 314 are improved.

It will be appreciated that in other embodiments, the first stop portion 315 may also be protruding from the top of the rotating shaft 314 or other positions; the two first stopping portions 315 may be arranged on the rotating shaft 314 in other manners, and the number of the first stopping portions 315 may be one or more than two.

Example 6:

referring to fig. 24 and 25 together, fig. 24 is a schematic structural view of the blade 31 in embodiment 6 of the present invention, and fig. 25 is a schematic structural view of the supporting plate 20 in embodiment 6 of the present invention. The slider 313 is disposed on the second end 312 of the blade 31, and the slider 313 is also provided with a second stopper 316 for preventing the slider 313 from being separated from the slide slot 211.

In this embodiment, the second stopping portion 316 is provided as an annular flange, and the second stopping portion 316 abuts against a side surface of the supporting plate 20 after passing through the sliding slot 211, so as to limit the axial displacement of the sliding block 313 in the sliding slot 211, and prevent the sliding block 313 from being disengaged from the sliding slot 211. The second stop portion 316 is annular, so that the area of the second stop portion 316 against the supporting piece 20 can be increased, and at this time, the second stop portion 316 has better structural strength and stability is improved.

Due to the arrangement of the second stopping portion 316 on the sliding block 313, the stop bar 212 is protruded on the sliding groove 211 of the supporting plate 20 corresponding to the sliding block 313, and the stop bar 212 cooperates with the second stopping portion 316 to limit the sliding block 313 to be separated from the corresponding supporting plate 20. Due to the arrangement of the barrier rib 212 on the sliding groove 211, the volume of the cavity at one end of the sliding groove 211, where the barrier rib 212 is not arranged, is relatively large, the volume of the cavity at the part where the barrier rib 212 is arranged is relatively small, the second blocking portion 316 can penetrate through the sliding groove 211 through the cavity at the end of the sliding groove 211, where the volume of the barrier rib is large, and the second blocking portion 316 abuts against the surface of the supporting plate 20 and the surface of the barrier rib 212 after penetrating through the sliding groove 211, so that the anti-falling effect on the sliding block 313 is realized.

It will be appreciated that in other embodiments, the second stop 316 may also be a semicircular flange, a bump, or other structure to prevent the sliding block 313 from being pulled off.

It will be appreciated that when the length of the medical stent to be compressed is relatively long, multiple support tabs 20 and multiple sets of blade sets 30 may be stacked within the compression device 100. Since the supporting plates 20 are duplex supporting plates, the supporting plates 20 not only provide the sliding track of one group of the blade groups 30, but also provide the rotating pivot of the other group of the blade groups 30, so that the compressing device 100 provided by the invention does not need to provide two supporting plates 20 to respectively provide the sliding track and the rotating pivot, and the number of the supporting plates 20 required to be carried by the blade groups 30 is reduced, which has the direct advantages that: firstly, the number of the supporting sheets 20 is reduced, so that the production cost can be reduced; secondly, only one supporting sheet 20 is needed to be arranged between the two blade groups 30, namely, the thickness is reduced to half, so that the utilization rate of the blade 31 for compressing the medical stent is improved when the medical stent is compressed by the compression device 100, the compression of the medical stent is more uniform, and the problem of partial non-uniform compression of the medical stent can be avoided.

In addition, the support plates 20 are duplex support plates, and each support plate 20 has the same structure, so that the support plates 20 can be processed through only one die, and compared with the processing process that the traditional compression device needs two dies to respectively produce two types of support plates, the number of the dies with high manufacturing cost is reduced, and the manufacturing cost of the support plates 20 and the compression device 100 is reduced.

According to the medical stent compression device 100 provided by the invention, the support piece 20 is arranged as the duplex support piece by simultaneously arranging the sliding connection part 21 which is in sliding connection with the blade 31 and the rotating connection part 22 which is in rotating connection with the blade 31 on the support piece 20, so that the number of the support pieces 20 is reduced, the volume of the medical stent compression device 100 is reduced, the manufacturing cost of the medical stent compression device 100 is also reduced, and the medical stent compression device has a wide application prospect.

It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration of the invention and are not intended to be limiting, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.

Claims

1. An expandable medical stent compression device comprising:

the blade group comprises a plurality of blades, one side of each blade is in sliding connection with one supporting piece, the other side of each blade is in rotary connection with the other supporting piece, a central through hole is formed by surrounding the plurality of blades, the size of the central through hole can be changed by the movement of the blades to compress the medical bracket,

The method is characterized in that: the device also comprises a fixed operation part and a movable operation part, wherein the fixed operation part is connected with one of the at least two annular supporting sheets, the movable operation part is connected with the other of the at least two annular supporting sheets, the movable operation part can drive the corresponding support piece to rotate relative to the other support piece so as to change the size of the central through hole;

At least one of the at least two annular supporting sheets is a duplex supporting sheet, and the duplex supporting sheet is provided with a sliding connecting part which is in sliding connection with the blade and a rotating connecting part which is in rotating connection with the blade.

2. The medical stent compression device of claim 1, wherein: the rotary connecting part on the duplex supporting piece is a shaft hole, and the sliding connecting part is a sliding groove.

3. The medical stent compression device of claim 2, wherein: the length direction of each sliding connection part is the radial direction of the corresponding supporting sheet.

4. A medical stent compression device as claimed in any one of claims 1 to 3 wherein: the rotary connecting parts on the duplex supporting sheets are arranged at intervals around the centers of the corresponding supporting sheets.

5. The medical stent compression device of claim 4, wherein: the center of the rotary connecting part is positioned on the circumference taking the center of the supporting sheet as the center of a circle; and/or the center of the sliding connection part is positioned on the circumference taking the center of the supporting sheet as the center of a circle.

6. The medical stent compression device of claim 1, wherein: the blade assembly comprises a blade assembly, a supporting piece and a supporting seat, wherein the blade assembly is arranged on the supporting seat, and the supporting piece and the blade assembly are accommodated in the supporting seat.

7. The medical stent compression device of claim 6, wherein: each supporting sheet comprises a handle, and the handle is convexly arranged at the periphery of the corresponding supporting sheet.

8. The medical stent compression device of claim 7, wherein: the fixed operation part can fix the position of the corresponding supporting piece relative to the supporting seat, and the blades arranged on two sides of the duplex supporting piece are in mirror symmetry.

9. The medical stent compression device of claim 8, wherein: the movable operation part is in sliding connection with the supporting seat, and/or the fixed operation part is in clamping connection with the supporting seat.

10. The medical stent compression device of claim 8, wherein: the part of the periphery of the supporting seat is arc-shaped, and the movable operation part is connected with the supporting seat and can slide along the arc shape of the supporting seat.

11. The medical stent compression device of claim 6, wherein the support base comprises a base and a frame connected to the base, the base and the frame together define a receiving space for receiving the support sheet and the blade set, and the support sheet and the blade set are disposed in the receiving space.

12. The medical stent compression device of claim 11, wherein: the base is provided with limit grooves corresponding to the support pieces, the side edges of each support piece are inserted into the limit grooves, and the limit grooves limit the axial movement of the corresponding support piece.

13. The medical stent compression device of claim 11 or 12, wherein: the base is provided with a liquid outlet which is used for discharging liquid in the accommodating space.

14. The medical stent compression device of claim 11 or 12, wherein: the frame is provided with a placement opening which is communicated with the accommodating space and penetrates through two opposite side surfaces of the frame, and the central through hole is aligned with the placement opening.

15. The medical stent compression device of claim 1, wherein: each blade is arc-shaped, and a plurality of arc-shaped blades are sequentially overlapped along the circumferential direction and mutually staggered by a preset radian.

16. The medical stent compression device of claim 1, wherein: each of the blades is disposed obliquely with respect to a central axis of the central through hole.

17. The medical stent compression device of claim 16, wherein: each blade is inclined at an angle ranging from 0 to 5 degrees relative to the central axis of the central through hole.

18. The medical stent compression device of claim 1, wherein: the blades arranged on the two sides of the duplex supporting piece are mirror symmetry.

19. The medical stent compression device of claim 1, wherein: the movement directions of the blades arranged on the two sides of the duplex supporting piece are opposite.

20. The medical stent compression device of claim 1, wherein: one side of the blade is provided with a rotating shaft which can be in rotating fit with the supporting piece, and the other side of the blade is provided with a sliding block which can be in sliding fit with the supporting piece.

21. The medical stent compression device of claim 20, wherein: the side or top of the rotating shaft is convexly provided with at least one first stop part, and the first stop part is matched with the corresponding supporting piece or the duplex supporting piece to limit the rotating shaft to be separated from the corresponding supporting piece.

22. The medical stent compression device of claim 21, wherein: the first stop parts are arranged on the side face of the rotating shaft, the number of the first stop parts is two, and the two first stop parts are symmetrically arranged on the side face of the rotating shaft in a protruding mode relative to the central axis of the rotating shaft.

23. The medical stent compression device of claim 22, wherein: the rotary connecting part is a shaft hole, and an avoidance groove for avoiding the first stopping part is formed in the inner wall of the shaft hole.

24. The medical stent compression device of claim 20, wherein: the side or top of the sliding block is convexly provided with a second stop part, and the second stop part is matched with the sliding connection part to limit the sliding block to be separated from the corresponding supporting piece.

25. The medical stent compression device of claim 24, wherein: the second stop portion is an annular flange.

26. The medical stent compression device of claim 24, wherein: the sliding connection part is a sliding groove, a stop bar is convexly arranged on the inner wall of the sliding groove, and the stop bar is matched with the second stop part to limit the sliding block to be separated from the corresponding supporting piece.

27. The medical stent compression device of claim 1, wherein: the surface of the blade, which is contacted with the medical support, is an arc-shaped concave surface, and the arc-shaped concave surface encloses the central through hole.

28. The medical stent compression device of claim 27, wherein: the contact surface of the blade and the medical support is a semicircular cambered surface.