Piercing device and its telescopic arm

Abstract

The application is suitable for the technical field of medical devices, and discloses a puncture device which comprises a driving catheter, an extension arm, a connecting catheter and a puncture assembly. The driving catheter is used for accommodating a guide wire. The extension arm comprises a fixed end connected to one end of the driving catheter and a movable end sleeved on the driving catheter. The fixed end cannot move along the axial direction of the driving catheter. A bendable strutting part is arranged between the fixed end and the movable end. The movable end can move towards the fixed end, so that the strutting part is bent away from the driving catheter. The connecting catheter is internally provided with a threading channel and a catheter channel at intervals. The two ends of the threading channel and the catheter channel are both communicated with the outside. The threading channel is used for accommodating the puncture assembly, and the catheter channel is used for penetrating the driving catheter. The puncture assembly comprises a puncture needle and a suture arranged at the end of the puncture needle away from the needle tip. The application has the advantages of simple structure, convenient operation, quick and stable puncture of the heart septum, difficulty in falling out of the puncture needle, difficulty in causing secondary damage to the heart septum, and high practicability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a puncture device and a telescopic arm thereof. BACKGROUND

[0002] In structural heart disease, the structure of the heart is changed, such as the deformation of acquired performance loss of heart tissue, or the incorrect closure of congenital structural defects, etc., which can cause blood to flow to the wrong place, thereby seriously endangering human health. In early years, surgical treatment was mostly used, and in recent years, interventional surgery gradually replaced surgical treatment. In specific treatment methods, occlusion, suturing, mechanical material replacement or biological material replacement can be used for treatment.

[0003] However, the existing occlusion device is large in size and mostly made of metal, which increases the risk of complications. In the existing suturing device, the puncture assembly is not easy to accurately and stably pass through the heart tissue, and the operation is very inconvenient. SUMMARY

[0004] To solve the above problems, the present application provides a puncture device and a telescopic arm thereof, which at least solves the problem of inconvenient operation caused by the puncture device not being easy to accurately and stably pass through the heart tissue in the prior art.

[0005] The present application provides a puncture device, which comprises a driving catheter, a telescopic arm, a connecting catheter and a puncture assembly.

[0006] The driving catheter is used to accommodate a guide wire.

[0007] The telescopic arm comprises a fixed end connected to one end of the driving catheter and a movable end slidingly sleeved on the driving catheter, and a bendable expansion part is arranged between the fixed end and the movable end. The movable end can move towards the fixed end, so that the expansion part bends away from the driving catheter.

[0008] The connecting catheter is internally provided with a threading channel and a catheter channel at intervals, both ends of the threading channel and the catheter channel are in communication with the outside, the threading channel is used to accommodate the puncture assembly, and the catheter channel is used to pass the driving catheter.

[0009] The puncture assembly comprises a puncture needle and a suture arranged at one end of the puncture needle away from the needle tip.

[0010] In an embodiment, the expansion part comprises a proximal swing arm and a distal swing arm which are hingedly connected to each other, one end of the distal swing arm is hingedly connected to the fixed end, and one end of the proximal swing arm is hingedly connected to the movable end.

[0011] In an embodiment, the telescopic arm further comprises a capturing assembly disposed on a side of the proximal swing arm away from the driving catheter;

[0012] The capturing assembly is used to fix the puncture assembly.

[0013] In an embodiment, the capturing assembly comprises a capturing plate and a positioning hole formed in the capturing plate;

[0014] The proximal swing arm is provided with an inner through hole and a positioning column located on a side of the inner through hole;

[0015] The capturing plate is nested on the positioning column through the positioning hole.

[0016] In an embodiment, the capturing plate is made of a memory elastic material and can be penetrated by the puncture needle;

[0017] When the puncture needle penetrates the capturing plate, the telescopic arm is closed to make the capturing plate disengage from the proximal swing arm.

[0018] In an embodiment, when the telescopic arm is closed, the included angle between the proximal swing arm and the axis of the driving catheter is 0°-5°;

[0019] When the telescopic arm is fully opened, the included angle between the proximal swing arm and the axis of the driving catheter is 70°-90°.

[0020] In an embodiment, the fixed end is fixedly connected with the driving catheter, and the movable end abuts against the connecting catheter.

[0021] In an embodiment, the fixed end is rotatably connected with the driving catheter, and the movable end is fixedly connected with the connecting catheter.

[0022] In an embodiment, the connecting catheter further comprises a threaded sleeve fixedly connected with the connecting catheter or the movable end;

[0023] The outer wall surface of the driving catheter is provided with an external thread threadedly matched with the threaded sleeve.

[0024] In an embodiment, the plurality of dilating parts and the plurality of threading channels are uniformly and spacedly arranged around the connecting catheter.

[0025] The embodiments of the present application further provide a telescopic arm of a puncture device, comprising a fixed end and a movable end;

[0026] The fixed end and the movable end are provided with a bendable expansion part, and the movable end can move towards the fixed end, so that the expansion part bends in a direction away from the movable end and perpendicular to the movement track of the movable end.

[0027] The telescopic arm provided in the embodiment can pass through the cardiac septum puncture hole together with the puncture device when closed, and will not cause secondary damage to the cardiac septum, and after the puncture device passes through the cardiac septum puncture hole, the telescopic arm can be opened and attached to the cardiac septum, thereby providing support for the cardiac septum and preventing the cardiac septum from swinging when the puncture needle punctures, and ensuring the success rate of puncture.

[0028] The present application improves the problem in the prior art that the puncture device is not easy to accurately and stably pass through the cardiac tissue when puncturing, thereby improving the operation, and has the following beneficial effects:

[0029] 1. A driving catheter moving along the guide wire is arranged, and a telescopic arm is arranged at one end of the driving catheter, and the telescopic arm can be opened after the driving catheter passes through the cardiac septum puncture hole, at this time, the telescopic arm can provide support for the cardiac septum, so as to facilitate the puncture of the puncture needle;

[0030] 2. A fixed end and a movable end are arranged, and the opening and closing of the expansion part are controlled by the fixed end and the movable end, so as to realize the opening and closing of the telescopic arm;

[0031] 3. A threading channel is arranged, so that the puncture needle and the suture move along the threading channel, thereby facilitating the corresponding of the puncture needle and the expansion part, and facilitating the accurate penetration of the cardiac septum.

[0032] The present application has the advantages of simple structure, convenient operation, fast and stable puncture of the cardiac septum, and the puncture needle is not easy to fall out and cause secondary damage to the cardiac septum, and high practicability. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0034] Figure 1 The puncture device provided in the embodiment of the present application is shown in the figure Figure 1 .

[0035] Figure 2 The puncture device shown in the figure Figure 1 . Figure 2 .

[0036] Figure 3 The puncture device shown in the figure Figure 1Exploded perspective view of the puncture device.

[0037] Figure 4 For Figure 1 Partial cutaway view of the telescoping arm and its adjacent structure of the puncture device shown.

[0038] Figure 5 For Figure 1 Partial cutaway view of the telescoping arm and its adjacent structure of another embodiment of the puncture device shown.

[0039] Figure 6 For Figure 7 Partial cutaway view of the drive conduit in the puncture device shown.

[0040] Figure 7 For Figure 7 Partial cutaway view of the movable end in the puncture device shown.

[0041] Figure 8 For Figure 1 Perspective view of the telescoping arm in the puncture device shown.

[0042] Figure 9 For Figure 1 Exploded perspective view of the telescoping arm in the puncture device shown.

[0043] Figure 10 For Figure 1 Perspective view of the puncture assembly in the puncture device shown.

[0044] Figure 11 For Figure 10 Cutaway view of the puncture assembly shown.

[0045] Figure 12 For Figure 10 Cutaway view of the puncture needle in the puncture assembly shown.

[0046] Figure 13 For Figure 10 Perspective view of the hollow tube in the puncture assembly shown.

[0047] Figure 14 For Figure 10 Perspective view of the hollow tube in another embodiment of the puncture assembly shown.

[0048] Figure 15 For Figure 1 Perspective view of the capture assembly in the puncture device shown.

[0049] Figure 16 For Figure 1 Top view of the capture assembly in the puncture device shown.

[0050] Figure 17 Figure 1 is a schematic view of a first embodiment of a puncture device according to the present application. Figure 1 Figure 2 is a schematic view of a second embodiment of a puncture device according to the present application.

[0051] Figure 18 Figure 3 is a schematic view of a third embodiment of a puncture device according to the present application. Figure 1 Figure 4 is a schematic view of a fourth embodiment of a puncture device according to the present application.

[0052] Figure 19 Figure 5 is a schematic view of a fifth embodiment of a puncture device according to the present application. Figure 1 Figure 6 is a schematic view of a sixth embodiment of a puncture device according to the present application.

[0053] Figure 20 Figure 7 is a schematic view of a seventh embodiment of a puncture device according to the present application. Figure 1 Figure 8 is a schematic view of an eighth embodiment of a puncture device according to the present application.

[0054] Figure 21 Figure 9 is a schematic view of a ninth embodiment of a puncture device according to the present application. Figure 20 Figure 10 is a schematic view of a tenth embodiment of a puncture device according to the present application.

[0055] Figure 22 Figure 11 is a schematic view of an eleventh embodiment of a puncture device according to the present application. Figure 1 Figure 12 is a schematic view of a twelfth embodiment of a puncture device according to the present application.

[0056] Figure 23 Figure 13 is a schematic view of a thirteenth embodiment of a puncture device according to the present application. Figure 1 Figure 14 is a schematic view of a fourteenth embodiment of a puncture device according to the present application.

[0057] Figure 24 Figure 15 is a schematic view of a fifteenth embodiment of a puncture device according to the present application. Figure 1 Figure 16 is a schematic view of a sixteenth embodiment of a puncture device according to the present application.

[0058] The meanings of the reference signs in the figures are as follows:

[0059] 1. drive catheter; 11. external thread; 12. shaft sleeve; 13. protrusion;

[0060] 2. telescopic arm; 21. fixed end; 22. movable end; 23. expansion section; 24. capture assembly;

[0061] 231. proximal swing arm; 2311. inner through hole; 2312. positioning post; 2313. limiting member; 23131. outer through hole; 232. distal swing arm;

[0062] 241. capture plate; 242. positioning hole; 243. bayonet;

[0063] 3. connecting catheter; 31. threading channel; 311. inclined section; 312. horizontal section; 32. threaded sleeve; 33. catheter channel;

[0064] 4, puncture assembly; 41, puncture needle; 411, needle tip; 412, reverse portion; 413, waist; 42, hollow tube; 43, suture; 44, fixed sleeve; 45, puncture base;

[0065] 5, handle. DETAILED DESCRIPTION

[0066] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0067] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the patent. The terms "first", "second" are only for the purpose of convenient description, and cannot be understood as indicating or implying relative importance or implying the number of technical features. The meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0068] It should also be noted that the same reference signs are used to represent the same components or the same parts in the embodiments of the present application. For the same parts in the embodiments of the present application, only one part or component may be labeled with a reference sign in the drawing, and it should be understood that the reference sign is also applicable to other identical parts or components.

[0069] In order to illustrate the technical solutions of the present application, the following will be described with reference to specific drawings and embodiments.

[0070] Reference Figures 1-3 The embodiments of the present application provide a puncture device for carrying a suture 43 through a heart septum, which includes a drive catheter 1, an extension arm 2, a connecting catheter 3 and a puncture assembly 4.

[0071] The drive catheter 1 is used to accommodate a guide wire, the drive catheter 1 is a hollow thin-walled tube and has a certain deformation ability, the drive catheter 1 is sleeved outside the guide wire, and the guide wire can be first inserted into the heart through a vein, and then the drive catheter 1 is made to enter the heart along the guide wire.

[0072] The telescopic arm 2 is used to fix the heart septum, so that the puncture assembly 4 can pass through the heart septum. The telescopic arm 2 comprises an opening part 23 arranged on the driving catheter 1. The opening part 23 is in contact with the driving catheter 1 when it is closed and can pass through the heart septum hole together with the driving catheter 1. The opening part 23 is opened after passing through the heart septum hole, and one side of the opening part 23 can be in contact with the heart septum.

[0073] The opening part 23 can be various structures capable of opening and closing, such as umbrella-like structure, connecting rod structure. Since the heart septum is relatively soft and there is no trachea or part on both sides for eating support, it is difficult for the puncture needle 41 to directly penetrate the heart septum. The purpose of the design of the opening part 23 is to provide fixation and support for the heart septum, so that the puncture assembly 4 can better penetrate the heart septum.

[0074] The connecting catheter 3 is used to accommodate the puncture assembly 4. The connecting catheter 3 is a hollow thin-walled pipe with a certain deformation ability. The connecting catheter 3 is provided with a catheter passage 33. The connecting catheter 3 is sleeved on the outside of the driving catheter 1. The connecting catheter 3 is fixedly connected with a wire passage 31. The wire passage 31 and the catheter passage 33 are arranged in a spaced manner. The puncture assembly 4 is arranged in the wire passage 31. Both ends of the wire passage 31 are in communication with the outside. One end of the wire passage 31 faces the telescopic arm 2, and the other end extends to the outside of the patient's body. The user can push the puncture assembly 4 along the wire passage 31 from the outside of the patient's body, and the puncture assembly 4 can be extended from one end of the wire passage 31 towards the telescopic arm 2. Then the user continues to push the puncture assembly 4. Under the support of the opening part 23, the puncture assembly 4 can easily pass through the heart septum.

[0075] The distance between one end of the connecting catheter 3 and the telescopic arm 2 is close, that is, one end of the connecting catheter 3 is close to the heart septum when the opening part 23 is in contact with the heart septum, so that the puncture assembly 4 can penetrate the heart septum.

[0076] The puncture assembly 4 comprises a puncture needle 41 and a suture 43. The suture 43 is fixedly connected to the end of the puncture needle 41 away from the needle tip. The puncture needle 41 and the suture 43 are medical devices commonly used in heart surgery. The puncture assembly 4 is used to penetrate the heart septum and carry the suture 43 through the heart septum.

[0077] Optionally, the driving catheter 1 is made of medical metal material with deformation ability, such as stainless steel. The deformation ability of the driving catheter 1 enables the driving catheter 1 to enter the heart along the guide wire through the vein. The metal material makes it have a certain strength to support the internal structure.

[0078] Optionally, the connecting catheter 3 is made of medical metal material with deformation ability, such as stainless steel. The deformation ability of the connecting catheter 3 enables the connecting catheter 3 to enter the heart along the guide wire through the vein. The metal material makes it have a certain strength to support the internal structure.

[0079] In the specific use of the embodiment, the guide wire is first inserted into the heart along the vein and penetrates the heart septum perforation; then the drive catheter 1 is pushed to enter along the guide wire, and the connecting catheter 3 is synchronously entered along with the drive catheter 1; after the telescopic arm 2 penetrates the heart septum perforation, the expansion part 23 is opened, then the connecting catheter 3 is slightly pulled back to make the expansion part 23 contact the heart septum; then the puncture assembly 4 is pushed out from the connecting catheter 3 towards one end of the telescopic arm 2 and penetrates the heart septum, and the puncture work is completed.

[0080] Then there are two ways to fix the suture line 43:

[0081] Method one: the puncture needle 41 is clamped in the expansion part 23 after penetrating the heart septum, the user slightly pushes the connecting catheter 3 towards the inside of the heart and makes the expansion part 23 close, then the drive catheter 1 is withdrawn, in the process the puncture needle 41 moves with the expansion part 23 and brings the suture line 43 out of the patient's body again, that is, one end of the suture line 43 penetrates the heart septum and returns to the patient's body again, both ends of the suture line 43 are located outside the patient's body.

[0082] Method two: the puncture needle 41 does not cooperate with the expansion part 23 after penetrating the heart septum, the user slightly pushes the connecting catheter 3 towards the inside of the heart and makes the expansion part 23 close, then the drive catheter 1 is withdrawn, and the puncture needle 41 always remains in the heart, that is, one end of the suture line 43 and the puncture needle 41 penetrate the heart septum and remain in the heart, and the other end of the suture line 43 is located outside the patient's body.

[0083] The embodiment provides a structure capable of providing support for the heart septum, which will not cause secondary damage to the heart septum perforation or the heart septum, and can make the puncture needle 41 better penetrate the heart septum, while ensuring that no secondary damage is caused in the process of the puncture needle 41 penetrating the heart septum.

[0084] Reference Figures 4-7 In an embodiment, the telescopic arm 2 includes a fixed end 21 connected to the drive catheter 1 and a movable end 22 sleeved on the drive catheter 1, the fixed end 21 cannot move along the axial direction of the drive catheter 1, the movable end 22 can move along the axial direction of the drive catheter 1, the fixed end 21 and the movable end 22 are provided with an expansion part 23, one end of the expansion part 23 is connected to the fixed end 21 and the other end is connected to the movable end 22, the movement of the movable end 22 towards the fixed end 21 can drive the expansion part 23 to open, and the movement of the movable end 22 away from the fixed end 21 can drive the expansion part 23 to close.

[0085] Reference Figure 4Optionally, there is a space between the movable end 22 and the connecting conduit 3, and the two are not connected. When in use, the user can push the connecting conduit 3 and make the connecting conduit 3 abut against the movable end 22, so as to push the movable end 22 to move towards the fixed end 21 through the connecting conduit 3. When the support part 23 needs to be closed, the connecting conduit 3 needs to be pulled out first, and then the driving conduit 1 is pulled out, and the support part 23 is closed by the pressure of the heart septum.

[0086] Reference Figure 4 Optionally, the movable end 22 and the connecting conduit 3 are fixedly connected. At this time, pushing the connecting conduit 3 towards the heart can drive the movable end 22 to move towards the fixed end 21 and drive the support part 23 to open. Pulling the connecting conduit 3 away from the heart can drive the movable end 22 to move away from the fixed end 21 and drive the support part 23 to close.

[0087] Reference Figures 5-7 Further, the fixed end 21 is rotationally connected to the driving conduit 1. Specifically, one end of the driving conduit 1 is fixedly connected with a shaft sleeve 12, and the driving conduit 1 is further fixedly connected with a protrusion 13. Under the joint action of the protrusion 13 of the shaft sleeve 12, the fixed end 21 can rotate circumferentially along the driving conduit 1 but cannot move axially. The movable end 22 is fixedly connected to the connecting conduit 3. The movable end 22 or the connecting conduit 3 is fixedly connected with a threaded sleeve 32. The threaded sleeve 32 is internally provided with internal threads. The outer wall of the driving conduit 1 is provided with external threads 11. The threaded sleeve 32 can cooperate with the external threads 11. At this time, rotating the connecting conduit 3 can drive the movable end 22, the support part 23 and the fixed end 21 to rotate circumferentially around the driving conduit 1. Under the action of the external threads 11 and the threaded sleeve 32, the movable end 22 can move towards the fixed end 21 or away from the fixed end 21 along with the rotation of the driving conduit 1. By using the self-locking characteristic of the threaded cooperation, the opening state or the closing state of the support part 23 can be fixed, and the operation difficulty of the user is reduced.

[0088] Reference Figure 4 , Figure 5 In an embodiment, the threading channel 31 comprises an inclined part 311 and a horizontal part 312 which are in communication with each other. The axis of the horizontal part 312 is horizontal to the connecting conduit 3, and the axis of the inclined part 311 is towards the direction after the expansion of the telescopic arm 2. This arrangement makes the puncture assembly 4 be able to face the target site after being threaded out of the threading channel 31, so as to facilitate the puncture of the heart septum.

[0089] Further, the included angle between the axis of the inclined part 311 and the axis of the horizontal part 312 is 10°-20°. This arrangement makes the bending angle of the puncture assembly 4 be smaller when the puncture assembly 4 enters the inclined part 311, reduces the resistance of the advancement of the puncture assembly 4, and also makes the inclined angle of the puncture assembly 4 be smaller when the puncture assembly 4 is threaded out of the threading channel 31, so that the target site punctured by the puncture assembly is closer to the heart septum, thereby facilitating the suturing.

[0090] Reference Figure 8 In an embodiment, the expansion part 23 comprises a proximal swing arm 231 and a distal swing arm 232, one end of the distal swing arm 232 is hinged to the fixed end 21, one end of the proximal swing arm 231 is hinged to the movable end 22, the other end of the proximal swing arm 231 and the other end of the distal swing arm 232 are hinged, at this time, the movement of the movable end 22 towards the fixed end 21 can make the hinged part of the proximal swing arm 231 and the distal swing arm 232 move away from the driving catheter 1, thereby achieving the effect of opening the expansion part 23.

[0091] Optionally, there is a space between the movable end 22 and the connecting catheter 3 and they are not connected, the user can push the connecting catheter 3 and make the connecting catheter 3 abut against the movable end 22 when using, thereby pushing the movable end 22 towards the fixed end 21 through the connecting catheter 3, when the expansion part 23 needs to be closed, the connecting catheter 3 needs to be pulled out first, then the driving catheter 1 is pulled out, and the expansion part 23 is closed by the pressure of the heart septum.

[0092] Further, a torsional spring is arranged at the hinged part of the proximal swing arm 231 and the movable end 22, the torsional spring is in the initial state when the expansion part 23 is in the closed state.

[0093] Or a torsional spring is arranged at the hinged part of the distal swing arm 232 and the fixed end 21, the torsional spring is in the initial state when the expansion part 23 is in the closed state.

[0094] Or a torsional spring is arranged at the hinged part of the proximal swing arm 231 and the movable end 22 and the hinged part of the distal swing arm 232 and the fixed end 21, the torsional spring is in the initial state when the expansion part 23 is in the closed state.

[0095] The arrangement of the torsional spring makes the proximal swing arm 231 and / or the distal swing arm 232 swing towards the driving catheter 1 under the action of the torsional spring after the connecting catheter 3 and the movable end 22 are separated, thereby closing the expansion part 23.

[0096] Optionally, the movable end 22 and the driving catheter 1 are clearance fitted, which ensures that the movable end 22 can smoothly slide along the driving catheter 1.

[0097] Optionally, when the telescopic arm 2 is closed, the included angle between the proximal swing arm 231 and the axis of the connecting catheter 3 is 0°-5°, which makes the proximal swing arm 231 closer to the driving catheter 1 when the telescopic arm 2 is closed, and also ensures that the proximal swing arm 231 can move away from the driving catheter 1 when the telescopic arm 2 is opened.

[0098] Optionally, the angle between the proximal swing arm 231 and the axis of the connecting conduit 3 is 70°-90° when the telescopic arm 2 is fully opened, which allows one side of the proximal swing arm 231 to be in contact with the heart septum when the telescopic arm 2 is fully opened, so as to facilitate the puncture needle 41 to puncture the heart septum.

[0099] The embodiment provides a structure for facilitating the user to control the opening or closing of the telescopic arm 2, so that the user can control the opening and closing of the telescopic arm 2 outside the patient.

[0100] Reference Figure 9 In an embodiment, the proximal swing arm 231 is provided with a capturing assembly 24, and the puncture needle 41 can be fixed by the capturing assembly 24 after penetrating the heart septum. The capturing assembly 24 is used for clamping or fixing the puncture needle 41, and can be a magnet, a medical metal plate, a medical silica gel plate or the like.

[0101] Optionally, the capturing assembly 24 is detachably connected to the proximal swing arm 231, and when the capturing assembly 24 fixes the puncture needle 41, the strutting part 23 is closed to make the capturing assembly 24 separate from the proximal swing arm 231, and the telescopic arm 2 exits the heart, so that the capturing assembly 24 and the puncture needle 41 are both left in the heart, that is, one end of the suture line 43 passes through the heart septum and is left in the heart, and the other end of the suture line 43 is located outside the patient.

[0102] In the premise that the capturing assembly 24 can be taken out of the proximal swing arm 231 by the puncture needle 41, the detachable connection mode of the capturing assembly 24 can be clamping or other common detachable connection modes.

[0103] Further, the proximal swing arm 231 is provided with an inner through hole 2311, and the puncture needle 41 passes through the inner through hole 2311 and is captured by the capturing assembly 24 after penetrating the heart septum.

[0104] Optionally, the capturing assembly 24 is detachably connected to the proximal swing arm 231, and when the capturing assembly 24 fixes the puncture needle 41, the strutting part 23 is closed, the puncture needle 41 moves synchronously when the telescopic arm 2 exits the heart, and finally the puncture needle 41 is taken out of the patient, that is, one end of the suture line 43 passes through the heart septum and returns to the patient, and both ends of the suture line 43 are located outside the patient.

[0105] In the premise that the capturing assembly 24 cannot be taken out of the proximal swing arm 231 by the puncture needle 41, the detachable connection mode of the capturing assembly 24 can be bolt connection or other common detachable connection modes.

[0106] Further, the proximal swing arm 231 is provided with an inner through hole 2311, and the puncture needle 41 passes through the inner through hole 2311 and is captured by the capturing assembly 24 after penetrating the heart septum.

[0107] Further, the proximal swing arm 231 is fixedly connected with a limiting piece 2313 on the side away from the driving catheter 1, and the capturing assembly 24 is located between the limiting piece 2313 and the proximal swing arm 231.

[0108] Further, a positioning column 2312 fixedly connected with the proximal swing arm 231 is arranged beside the inner through hole 2311, the positioning column 2312 penetrates through the limiting piece 2313 and is fixedly connected with the limiting piece 2313, and the fixed connection mode can be detachable connection modes such as interference fit and bolt connection.

[0109] Further, an outer through hole 23131 is arranged on the limiting piece 2313, and the outer through hole 23131 provides space for the puncture needle 41 to pass through the capturing assembly 24.

[0110] Optionally, the capturing assembly 24 is a magnet and is fixedly connected with the proximal swing arm 231, the puncture needle 41 is adsorbed by the capturing assembly 24 after passing through the heart septum, and the capturing assembly 24 is synchronously withdrawn when the telescopic arm 2 exits the heart, and the puncture needle 41 remains in the heart.

[0111] Optionally, the capturing assembly 24 is a medical metal card, and the puncture needle 41 is clamped on the capturing assembly 24 after passing through the heart septum, at this time, the capturing assembly 24 can be fixedly connected with the proximal swing arm 231, or can be detachably connected with the proximal swing arm 231, that is, the capturing assembly 24 can remain in the heart or be carried out of the patient's body by the telescopic arm 2.

[0112] Optionally, the capturing assembly 24 is a medical silica gel plate, and the puncture needle 41 is clamped on the capturing assembly 24 after passing through the heart septum, at this time, the capturing assembly 24 can be fixedly connected with the proximal swing arm 231, or can be detachably connected with the proximal swing arm 231, that is, the capturing assembly 24 can remain in the heart or be carried out of the patient's body by the telescopic arm 2.

[0113] The embodiment provides a connection mode of the capturing assembly 24 and the proximal swing arm 231, and realizes two modes of the suture 43 remaining in the heart, so as to facilitate subsequent suturing.

[0114] Reference Figures 10-14 In an embodiment, the puncture assembly 4 comprises a puncture needle 41, a suture 43 and a hollow tube 42.

[0115] The hollow tube 42 is fixedly connected with one end of the puncture needle 41 away from the needle tip, the hollow tube 42 is also sleeved outside the suture 43, the hollow tube 42 is arranged in the threading channel 31, and the hollow tube 42 is made of a material with elasticity and a certain strength, so that the hollow tube 42 can bend in the threading channel 31, and the user can also drive the needle tip to move towards the inside of the heart by pushing the hollow tube 42 out of the patient's body.

[0116] Reference Figure 13Optionally, the hollow tube 42 is a stainless steel spring tube, which allows the hollow tube 42 to bend along with the threading channel 31 and push the puncture needle 41 to move.

[0117] Further, the hollow tube 42 is made of medical stainless steel, which can be SUS304, SUS316, etc.

[0118] Reference Figure 14 Optionally, the hollow tube 42 is a stainless steel tube, and a plurality of small grooves are staggered on the side wall of the hollow tube 42, which allows the hollow tube 42 to bend better in the threading channel 31 while ensuring strength.

[0119] Further, the hollow tube 42 is made of medical stainless steel, which can be SUS304, SUS316, etc.

[0120] Reference Figure 11 、 Figure 12 、 Figures 15-21 In an embodiment, the puncture needle 41 includes a needle tip portion 411, an undercut portion 412, and a waist portion 413, wherein the needle tip portion 411 is used to penetrate the heart septum, the maximum diameter of the undercut portion 412 is greater than that of the waist portion 413, the undercut portion 412 is used to clamp the puncture needle 41 on the capture assembly 24 or the heart septum to prevent the puncture needle 41 from backtracking, and the waist portion 413 is used to provide a fixed base for the hollow tube 42 and the suture 43.

[0121] Reference Figure 11 Optionally, the waist portion 413 is fixedly connected with a fixed sleeve 44, the inner wall surface of the fixed sleeve 44 is fixedly connected with the outer wall surface of the waist portion 413, and one end of the hollow tube 42 is fixedly connected with the fixed sleeve 44.

[0122] Optionally, the capture assembly 24 includes a capture plate 241 and at least one notch 243 formed on the capture plate 241, the capture plate 241 is connected with the proximal swing arm 231, the maximum width of the notch 243 is less than the maximum diameter of the undercut portion 412, and the minimum width of the notch 243 is greater than the maximum diameter of the waist portion 413, which allows the undercut portion 412 to not backtrack after passing through the notch 243, and the waist portion 413 can be accommodated in the notch 243 for a long time without causing structural deformation.

[0123] The capture plate 241 is made of a memory metal material, the needle tip portion 411 of the puncture needle 41 can directly pass through the notch 243, the undercut portion 412 can stretch the notch 243 and pass through when passing through the notch 243, and then the capture plate 241 returns to its original state, and the waist portion 413 is located in the notch 243, at this time, the puncture needle 41 cannot backtrack under the action of the undercut portion 412.

[0124] Reference Figure 15 、 Figure 16Optionally, the shape of the socket 243 is long strip, the length of the socket 243 is greater than the width, the width of the socket 243 is less than the maximum diameter of the undercut portion 412, and the plurality of sockets 243 are arranged along the long edge direction of the capture plate 241.

[0125] Reference Figure 17 Optionally, the shape of the socket 243 is rhombus, the length of the short diagonal of the socket 243 is less than the maximum diameter of the undercut portion 412, and the plurality of sockets 243 are arranged along the long edge direction and the short edge direction of the capture plate 241.

[0126] Reference Figure 18 Optionally, the shape of the socket 243 is plum blossom, the plum blossom includes a central hole arranged in the center of the capture plate 241 and a plurality of horizontal holes arranged uniformly around the central hole, each horizontal hole and the central hole are connected by a long hole, and the plum blossom is formed in sequence. The maximum width of the plum blossom is less than the maximum diameter of the undercut portion 412.

[0127] Reference Figure 15 , Figure 16 Optionally, the capture assembly 24 includes a positioning hole 242 arranged on the capture plate 241, and the positioning hole 242 is sleeved on the positioning column 2312 when the capture assembly 24 is installed on the proximal swing arm 231.

[0128] When the limiting member 2313 is not arranged, the positioning hole 242 and the positioning column 2312 are in transition fit or interference fit, so that the capture assembly 24 cannot fall off during the process that the telescopic arm 2 enters the heart, and after the puncture needle 41 passes through the capture assembly 24, the puncture needle 41 can take the capture assembly 24 off the telescopic arm 2 with the closing of the telescopic arm 2.

[0129] When the limiting member 2313 is arranged, the positioning hole 242 and the positioning column 2312 can be in transition fit or interference fit, or can be in clearance fit to facilitate replacement. At this time, the limiting member 2313 shows that the capture assembly 24 falls off.

[0130] The embodiment provides a specific structure of the capture assembly 24, so that the puncture needle 41 can smoothly pass through the capture assembly 24 and cannot back off, thereby preventing the puncture needle 41 from penetrating out of the heart septum again after penetrating through the heart septum. In addition, the capture plate 241 with a large area and a smooth surface can also increase the contact area between the puncture needle 41 and the heart septum after the puncture needle 41 passes through the heart septum, thereby preventing the undercut portion 412 from causing secondary damage to the heart septum or forming a new wound when the suture 43 is pulled.

[0131] Reference Figures 1-3 In an embodiment, the puncture device provided by the application further includes a handle 5, which is used to provide a fixed basis for the driving catheter 1, the connecting catheter 3 and the puncture assembly 4.

[0132] The puncture assembly 4 further comprises a puncture base 45, the other end of the hollow tube 42 passes through the handle 5 and is detachably connected to the puncture base 45, the suture 43 can pass through or be fixed to the puncture base 45, the user can push the hollow tube 42 to move into the heart through the puncture base 45, so as to drive the puncture needle 41 to move synchronously, the puncture base 45 can be embedded into the handle 5 away from the patient at one end, and the puncture base 45 is embedded into the handle 5 when the puncture needle 41 is completely pushed in.

[0133] The guide wire can pass through the handle 5 and the puncture base 45.

[0134] Reference Figure 3 Optionally, the connecting catheter 3 is fixedly connected to the handle 5 towards the patient, the driving catheter 1 is slidingly connected to the handle 5, and the driving catheter 1 is provided with a button on one side, the user can push or pull the driving catheter 1 through the button, so that the fixed end 21 and the movable end 22 are close to or away from each other.

[0135] At this time, because the movable end 22 abuts against or is fixedly connected to the connecting catheter 3, pulling the driving catheter 1 can drive the fixed end 21 to move towards the movable end 22.

[0136] Further, in the case that the outer thread 11 is arranged outside the driving catheter 1, the button can also drive the driving catheter 1 to rotate.

[0137] Optionally, the driving catheter 1 is fixedly connected to the handle 5 towards the patient, the connecting catheter 3 is slidingly connected to the handle 5, and the connecting catheter 3 is provided with a button on one side, the user can push or pull the connecting catheter 3 through the button, so that the fixed end 21 and the movable end 22 are close to or away from each other.

[0138] At this time, because the driving catheter 1 is fixed to the handle 5, pushing the connecting catheter 3 can drive the fixed end 21 to move towards the movable end 22.

[0139] Further, in the case that the outer thread 11 is arranged outside the driving catheter 1, the button can also drive the connecting catheter 3 to rotate, and the rotation of the connecting catheter 3 will drive the telescopic arm 2 to rotate synchronously.

[0140] The embodiment provides a connection mode of the handle 5 and each component, so that the user can better operate the device.

[0141] Reference Figure 4 、 Figure 5In an embodiment, on the basis of the above-mentioned embodiment, the plurality of evenly spaced apart expansion portions 23 and the plurality of threading channels 31, the plurality of telescopic arms 2 and the plurality of threading channels 31 are evenly spaced apart around the connecting conduit 3, the number of expansion portions 23 is the same as the number of threading channels 31, the expansion portions 23 and the threading channels 31 correspond to each other, each expansion portion 23 is provided with a capturing assembly 24, and each threading channel 31 is provided with a puncturing assembly 4, and each puncturing assembly 4 is fixedly connected to the threading base at the other end.

[0142] The plurality of evenly spaced apart expansion portions 23 can ensure that the telescopic arm 2 can keep balance after passing through the heart septum perforation and being expanded, and also enables a plurality of suture lines 43 to pass through the heart septum, thereby facilitating subsequent suturing.

[0143] Reference Figures 22-24 In specific use, the guide wire is first inserted into the heart along the vein and passes through the heart septum perforation, then the driving conduit 1 is pushed to enter along the guide wire, and the connecting conduit 3 enters synchronously with the driving conduit 1, after the telescopic arm 2 passes through the heart septum perforation, the driving conduit 1 is pulled or the connecting conduit 3 is pushed, so that the fixed end 21 and the movable end 22 approach each other and the expansion portion 23 is opened, then the connecting conduit 3 is slightly pulled back and the expansion portion 23 is in contact with the heart septum;

[0144] Then the puncturing base 45 is pushed to extend towards the one end of the telescopic arm 2 along the threading channel 31 and penetrate the heart septum;

[0145] After the puncturing needle 41 penetrates the heart septum, it passes through the buckle 243, at this time the puncturing needle 41 is fixed to the capturing plate 241 and cannot be pulled back;

[0146] Then the driving conduit 1 is slightly pushed into the heart, then the driving conduit 1 is pushed or the connecting conduit 3 is pulled, so that the fixed end 21 and the movable end 22 move away from each other and the expansion portion 23 is closed;

[0147] At this time, the capturing plate 241 and the puncturing needle 41 move with the expansion portion 23, then the driving conduit 1 is pulled out, and the telescopic arm 2 and the capturing assembly 24 and the puncturing needle 41 are pulled out to the outside of the patient's body, and the puncturing is completed, at this time the one end of the suture line 43 passes through the heart septum and returns to the outside of the patient's body, and the two ends of the suture line 43 are located outside the patient's body;

[0148] Or with the closing of the expansion portion 23, the capturing plate 241 and the puncturing needle 41 remain in the heart, then the driving conduit 1 is pulled out, and the telescopic arm 2 is pulled out to the outside of the patient's body, and the puncturing is completed, at this time the one end of the suture line 43 and the puncturing needle 41 pass through the heart septum and remain in the heart, and the other end of the suture line 43 is located outside the patient's body.

[0149] The above examples are only used to illustrate the technical solutions of the present application, but not limit the same; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A puncture device, characterized in that, It includes a drive catheter (1), a telescopic arm (2), a connecting catheter (3), and a puncture assembly (4). The driving catheter (1) is used to accommodate the guidewire; The telescopic arm (2) includes a fixed end (21) connected to one end of the drive conduit (1) and a movable end (22) slidably sleeved on the drive conduit (1). A bendable expansion part (23) is provided between the fixed end (21) and the movable end (22). The movable end (22) can move toward the fixed end (21) so that the expansion part (23) bends away from the drive conduit (1). The connecting catheter (3) is provided with a threading channel (31) and a catheter channel (33) at intervals. Both ends of the threading channel (31) and the catheter channel (33) are connected to the outside. The threading channel (31) is used to accommodate the puncture component (4), and the catheter channel (33) is used to pass through the driving catheter (1). The puncture assembly (4) includes a puncture needle (41) and a suture (43) located at the end of the puncture needle (41) away from the needle tip. The opening part (23) includes a proximal swing arm (231) and a distal swing arm (232) that are hinged to each other. One end of the distal swing arm (232) is hinged to the fixed end (21), and one end of the proximal swing arm (231) is hinged to the movable end (22). The telescopic arm (2) also includes a capture assembly (24), which is located on the side of the proximal swing arm (231) away from the drive catheter (1) and is used to fix the puncture assembly (4). The capture assembly (24) includes a capture plate (241), which is made of a memory elastic material and can be passed through by the puncture needle (41). After the puncture needle (41) passes through the capture plate (241), the telescopic arm (2) closes, causing the capture plate (241) to disengage from the proximal swing arm (231).

2. The puncture device according to claim 1, characterized in that, The capture assembly (24) includes a positioning hole (242) formed in the capture plate (241). The proximal swing arm (231) has an inner through hole (2311) and a positioning post (2312) located next to the inner through hole (2311). The capture plate (241) is nested on the positioning post (2312) through the positioning hole (242).

3. The puncture device according to claim 1 or 2, characterized in that, When the telescopic arm (2) is closed, the angle between the axis of the proximal swing arm (231) and the axis of the drive conduit (1) is 0° to 5°. When the telescopic arm (2) is fully open, the angle between the axis of the proximal swing arm (231) and the axis of the drive conduit (1) is 70° to 90°.

4. The puncture device according to claim 1, characterized in that, The fixed end (21) is fixedly connected to the driving conduit (1), and the movable end (22) abuts against the connecting conduit (3).

5. The puncture device according to claim 1, characterized in that, The fixed end (21) is rotatably connected to the drive conduit (1), and the movable end (22) is fixedly connected to the connecting conduit (3).

6. The puncture device according to claim 5, characterized in that, The connecting conduit (3) also includes a threaded sleeve (32) fixedly connected to the connecting conduit (3) or the movable end (22). The outer wall of the drive conduit (1) is provided with an external thread (11) that is threaded to the threaded sleeve (32).

7. The puncture device according to any one of claims 1 or 2, 4-6, characterized in that, There are at least two of each of the spreading part (23) and the threading channel (31), and a plurality of the spreading parts (23) and the plurality of the threading channels (31) are evenly spaced around the connecting conduit (3).

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