A vascular implant that can be opened and closed conveniently

Abstract

The present invention discloses a vascular implant that can be opened and closed conveniently, and relates to the field of vascular implants, including a stent, wherein a through hole is provided at the center of the stent, and an elastic annular structure diaphragm is connected in the through hole, wherein the diaphragm can close the through hole at the center of the stent after being contracted, and the inner ring of the diaphragm is connected with a contraction component for controlling the contraction state of the diaphragm. The present invention uses a threading ring fixed by the inner ring of the diaphragm to pass a pull line, and when it is necessary to close the blood vessel incision, the pull line is tightened and the wire bundle block is pushed toward the center of the diaphragm, so that the diaphragm in a stretched state closes the through hole at the center of the stent, and the purpose of hemostasis is achieved. On the contrary, when it is necessary to pass through the through hole at the center of the stent for surgical operation, the pull line is relaxed and the wire bundle block is pulled away from the center of the diaphragm, and the diaphragm is restored by its own elastic force, and the normal operation is not affected.

Description

Technical Field

[0001] The invention relates to the field of vascular implants, in particular to a vascular implant which can be opened and closed conveniently. Background Art

[0002] The amount and speed of drug entering the blood vessels, the peak height and duration maintained in the blood vessels, etc. are affected by many factors and will directly determine the efficacy. Directly injecting the drug into the blood vessels can significantly increase the amount and peak value of the drug entering the blood vessels, which can significantly improve the treatment effect.

[0003] The absorbable vascular implant in the prior art consists of a patch and a stent, and is mostly used in arteriovenous incision closure surgery. A vascular closure device is used to extend the proximal part of the stent through the arteriovenous incision, and the distal part is connected to the patch to ensure that the patch is fixed at the incision. After implantation, the surface of the implant can be endothelialized and completely covered by tissue.

[0004] With respect to the above-mentioned related technologies, the existing vascular implants can only play the role of closing the arteriovenous incision after implantation. After the arteriovenous incision is closed, surgical instruments can no longer be inserted into the blood vessels through the incision, which makes it inconvenient to pass through the openings in the patient's arteries and veins to perform intravascular surgery. In summary, the existing vascular implants are not convenient for medical instruments to pass through the openings in the patient's arteries and veins to perform intravascular surgery during surgery. Summary of the invention

[0005] Based on this, an object of the present invention is to provide a vascular implant that can be opened and closed conveniently, so as to solve the technical problem that the existing vascular implant is not convenient for medical devices to pass through for intravascular surgery.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a vascular implant that can be opened and closed conveniently, comprising a stent, a through hole is arranged at the center of the stent, and an elastic annular structure diaphragm is connected in the through hole, the diaphragm can close the through hole in the center of the stent after contraction, and the inner ring of the diaphragm is connected to a contraction component for controlling the contraction state of the diaphragm.

[0007] By adopting the above technical solution, the pull wire is passed through the threading ring fixed on the inner circle of the diaphragm. When the blood vessel incision needs to be closed, the pull wire is tightened and the wire bundle block is pushed to the center of the diaphragm, so that the stretched diaphragm closes the through hole in the center of the stent, thereby achieving the purpose of hemostasis. Conversely, when it is necessary to pass through the through hole in the center of the stent for surgical operation, the pull wire is relaxed and the wire bundle block is pulled away from the center of the diaphragm. The diaphragm recovers due to its own elastic force, and the normal progress of the operation is not affected.

[0008] The present invention is further configured such that the inner ring of the diaphragm is connected with a threading ring, and a pull wire is passed through the threading ring.

[0009] By adopting the above technical solution, the diaphragm can be gathered toward the center by tightening the pull wire of the inner circle of the diaphragm, thereby closing the through hole in the center of the bracket.

[0010] The present invention is further configured such that both ends of the pull wire pass through one side of the threading ring and simultaneously pass through the wire harness block, and the pull wire passing through the wire harness block simultaneously passes into a hollow conduit, and the wire harness block is connected to the end of the conduit.

[0011] By adopting the above technical solution, the friction between the harness block and the pull wire is used to limit the sliding of the harness block, thereby preventing the diaphragm from opening due to its own elastic force.

[0012] The present invention is further configured such that the pulling wires passing through the wiring harness block are in close contact with the inner wall of the wiring harness block.

[0013] By adopting the above technical solution, there is sufficient friction between the harness block and the pull wire to prevent the diaphragm from opening uncontrollably.

[0014] The present invention is further configured such that a break is provided at one end of the conduit close to the harness block.

[0015] By adopting the above technical solution, the catheter can be easily separated from the harness block at the fracture.

[0016] The present invention is further configured such that a patch is fixedly connected to the outer wall of the bracket, and at least one positioning piece is connected to the upper end of the bracket.

[0017] By adopting the above technical solution, the implant can be stably fixed at the incision position of the blood vessel.

[0018] The present invention is further configured such that three positioning pieces are provided at intervals in a ring shape on the periphery of the bracket.

[0019] By adopting the above technical solution, the three positioning plates around the stent can further enhance the stability of the implant.

[0020] In summary, the present invention mainly has the following beneficial effects:

[0021] 1. The present invention sets a large-sized through hole in the center of the stent of the vascular implant, connects an elastic diaphragm structure in the center of the through hole, and passes a pull wire through a threading ring fixed on the inner ring of the diaphragm. When the vascular incision needs to be closed, the pull wire is tightened and the wire bundle block is pushed to the center of the diaphragm, so that the stretched diaphragm closes the through hole in the center of the stent, thereby achieving the purpose of hemostasis. On the contrary, when it is necessary to pass the through hole in the center of the stent for surgical operation, the pull wire is loosened and the wire bundle block is pulled away from the center of the diaphragm, and the diaphragm is restored by its own elastic force, which does not affect the normal operation.

[0022] 2. The present invention provides a fracture at the position of the harness block and the catheter. After the operation is completed, when the draw wire is tightened to close the membrane, the harness block and the catheter are separated at the fracture. At the same time, the draw wire is cut and the catheter is pulled out of the patient's body, so that the patient's blood vessel incision is quickly closed, and the surface of the implant remaining in the patient's body can be endothelialized and completely covered by tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A closed perspective view of the implant of the present invention;

[0024] Figure 2 For the present invention Figure 2 A magnified view of middle;

[0025] Figure 3 Open stereogram for the implant of the present invention;

[0026] Figure 4 For the present invention Figure 3 Enlarged view of B.

[0027] In the figure: 1. bracket; 2. patch; 3. diaphragm; 4. threading ring; 5. pull wire; 6. wire harness block; 7. catheter; 8. positioning piece. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] The following describes an embodiment of the present invention based on its overall structure.

[0030] Embodiment 1

[0031] A vascular implant that can be opened and closed conveniently, such as Figure 1-4 As shown, it includes a bracket 1, a through hole is set in the center of the bracket 1, and an elastic annular structure diaphragm 3 is connected in the through hole, the diaphragm 3 can close the through hole in the center of the bracket 1 after contraction, the inner circle of the diaphragm 3 is connected with a contraction component for controlling the contraction state of the diaphragm 3, specifically, the contraction component includes a threading ring 4 and a pull wire 5, the outer wall of the bracket 1 is fixedly connected with a patch 2, the upper end of the bracket 1 is connected with at least one positioning piece 8, the patch 2 is unfolded and fits the inner wall of the blood vessel after entering the blood vessel, and the positioning piece 8 can cooperate with the patch 2 and the bracket 1 to clamp the blood vessel wall after the outer wall of the blood vessel is stretched, so that the implant is stably fixed at the incision position of the blood vessel.

[0032] See also Figure 1-4The inner circle of the diaphragm 3 is connected with a threading ring 4, and a pulling wire 5 passes through the threading ring 4. The pulling wire 5 of the inner circle of the diaphragm 3 can be tightened to the center to close the through hole in the center of the bracket 1. Both ends of the pulling wire 5 pass through one side of the threading ring 4 and pass through the cable block 6 at the same time. The pulling wire 5 passing through the cable block 6 is simultaneously inserted into a hollow catheter 7, and the cable block 6 is connected to the end of the catheter 7. After the pulling wire 5 is tightened, the cable block 6 is pushed by the catheter 7 to approach the center of the diaphragm 3. The friction between the cable block 6 and the pulling wire 5 is used to limit the sliding of the cable block 6, thereby preventing the diaphragm 3 from opening due to its own elastic force. The pulling wire 5 passing through the cable block 6 is in close contact with the inner wall of the cable block 6, so that there is sufficient friction between the cable block 6 and the pulling wire 5 to prevent the diaphragm 3 from opening uncontrollably. After the catheter 7 is cut off at a position close to the cable block 6, the cable block 6 is prevented from sliding relative to the pulling wire 5.

[0033] Embodiment 2

[0034] A vascular implant that can be opened and closed conveniently, such as Figure 1-4 As shown, on the basis of the first embodiment, the difference from the first embodiment is that a fracture is provided at one end of the catheter 7 close to the harness block 6. Specifically, the catheter 7 is easily cut at the fracture, and the inner diameter of the catheter 7 is greater than the sum of the diameters of the two pull wires 5. The catheter 7 is easily broken and separated from the harness block 6 at the fracture. Three positioning pieces 8 are provided at annular intervals on the periphery of the stent 1. The positioning pieces 8 can be pushed out to fit the outer wall of the blood vessel when the vascular closure device releases the stent 1, and cooperate with the patch 2 located in the inner wall of the blood vessel to realize the positioning of the vascular implant. The three positioning pieces 8 around the stent 1 can further improve the stability of the implant.

[0035] Furthermore, during the operation, a cylindrical hollow titanium nail can be used. After two pull wires 5 are passed through the titanium nail, a locking device is used to deliver the titanium nail to the position of the blood vessel closure opening and clamp the titanium nail to play a locking role, thereby further improving the sealing effect of the diaphragm 3.

[0036] The working principle of the vascular implant that can be opened and closed conveniently is as follows: a vascular closure device is used to deliver the stent 1 and the patch 2 to the vascular incision. After the patch 2 enters the blood vessel, it is unfolded and adhered to the inner wall of the blood vessel. The multiple positioning pieces 8 on the stent 1 are extended to contact the outer wall of the blood vessel, so that the stent 1 and the patch 2 are stably fixed at the vascular incision. The pull wire 5 is tightened and the bundle block 6 is pushed toward the center of the stent 1 by the catheter 7. The diaphragm 3 is stretched and elastically deformed until the diaphragm 3 is deformed to close the through hole in the center of the stent 1 to prevent blood vessel bleeding. When surgery is required in the blood vessel, the pull wire 5 is loosened and the catheter 7 is pulled away from the center of the stent 1. The diaphragm 3 is restored by its own elastic force until the through hole in the center of the stent 1 is in an open state. At this time, the surgery can be conveniently performed through the through hole in the center of the stent 1. When all surgeries are completed, after the diaphragm 3 is contracted to close the through hole in the center of the stent 1, the catheter 7 and the pull wire 5 are cut along the cut of the catheter 7. The surface of the implant remaining in the patient's body can be endothelialized and completely absorbed by the tissue.

[0037] Although an embodiment of the present invention has been shown and described, this specific embodiment is only an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A vascular implant capable of being conveniently opened and closed, comprising a stent (1), characterized in that: A through hole is provided at the center of the support (1), and a diaphragm (3) having an elastic annular structure is connected in the through hole; the diaphragm (3) can close the through hole at the center of the support (1) after contraction, and a contraction component for controlling the contraction state of the diaphragm (3) is connected to the inner ring of the diaphragm (3); The bundling assembly comprises a threading ring (4) and a pulling wire (5); the inner ring of the diaphragm (3) is connected to the threading ring (4); the pulling wire (5) passes through the threading ring (4); both ends of the pulling wire (5) pass through one side of the threading ring (4) and simultaneously pass through a bundle block (6); the pulling wire (5) passing through the bundle block (6) simultaneously passes into a hollow conduit (7); the bundle block (6) is connected to the end of the conduit (7).

2. The vascular implant capable of being conveniently opened and closed according to claim 1, characterized in that: The pulling wire (5) passing through the wire harness block (6) is in close contact with the inner wall of the wire harness block (6).

3. The vascular implant capable of being conveniently opened and closed according to claim 1, characterized in that: One end of the conduit (7) close to the harness block (6) is provided with a break.

4. The vascular implant capable of being conveniently opened and closed according to claim 2, characterized in that: The outer wall of the bracket (1) is fixedly connected to a patch (2), and the upper end of the bracket (1) is connected to at least one positioning piece (8).

5. The vascular implant capable of being conveniently opened and closed according to claim 4, characterized in that: Three positioning pieces (8) are arranged at intervals in a ring shape on the periphery of the bracket (1).

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