Blood vessel plugging device

Abstract

The utility model discloses a blood vessel occluder which comprises a gasket, an occluding sponge, a first driving part and a second driving part, and the gasket is arranged in an outer tube in a sliding mode; the plugging sponge is slidably arranged in the outer pipe and is arranged at the opening end, away from the outer pipe, of the gasket; the first driving part is arranged in the outer pipe in a sliding manner and is in contact with the gasket; the second driving part is arranged in the outer pipe in a sliding manner and is in contact with the plugging sponge; the plugging sponge comprises a first expansion piece and a second expansion piece, the first expansion piece and the second expansion piece are embedded, the embedded ends of the first expansion piece and the second expansion piece are arranged close to the gasket, one of the first expansion piece and the second expansion piece is an expansion piece which expands axially, and the other one is an expansion piece which expands radially. According to the blood vessel plugging device, better compression can be formed on a blood vessel wound, the plugging effect is better, the hemostasis time is shortened, and the hemostasis efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a blood vessel occluder. Background Art

[0002] After femoral artery intervention, manual compression hemostasis was used to stop bleeding at the puncture site. Manual compression hemostasis has been used clinically for a long time. Long-term compression hemostasis and bed rest not only increase the workload of medical staff, but also increase the pain of patients.

[0003] To overcome the shortcomings of manual compression hemostasis, percutaneous arterial occlusion devices were introduced. The use of vascular occlusion devices can quickly achieve hemostasis without compressing the blood vessels or with minimal compression, and is not affected by continuous anticoagulation. The application of occlusion technology is the future development direction of arterial hemostasis. It can shorten the time of hemostasis and bed rest, and reduce the pain of patients and the intensity of medical care.

[0004] The existing collagen-based hemostatic occlusion device, after the collagen inside is released in the body, will absorb body fluids and expand freely. However, since the expansion coefficients of different parts of the collagen are different, it cannot form a good pressure on the puncture site of the blood vessel, affecting the occlusion effect. Utility Model Content

[0005] In view of this, the utility model provides a blood vessel occluder, which can form better compression on the blood vessel wound, has a better occlusion effect, shortens the hemostasis time, and improves the hemostasis efficiency.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A blood vessel occluder, comprising:

[0008] A gasket slidably disposed inside the outer tube of the occluder;

[0009] A plugging sponge slidably disposed inside the outer tube, wherein the plugging sponge is disposed at an opening end of the gasket away from the outer tube;

[0010] A first driving part is slidably disposed in the outer tube and in contact with the gasket;

[0011] A second driving part is slidably disposed in the outer tube and in contact with the blocking sponge;

[0012] The blocking sponge includes a first expansion piece and a second expansion piece, the first expansion piece is embedded with the second expansion piece, and the embedded ends of the two are arranged close to the gasket. One of the first expansion piece and the second expansion piece is an axially expanding expansion piece, and the other is a radially expanding expansion piece.

[0013] Optionally, the first expansion member is an axial expansion member, and the second expansion member is a radial expansion member;

[0014] The first expansion member is embedded in the end portion of the second expansion member close to the gasket.

[0015] Optionally, the first driving part includes a push rod and an inner tube connected together, the inner tube is sleeved on the inner side of the outer tube, one end of the push rod is arranged on the inner side of the outer tube, and the other end passes through the end of the outer tube and is arranged on the outer side of the outer tube, and the end of the inner tube away from the push rod is in contact with the gasket.

[0016] Optionally, the end of the inner tube contacts the edge of the gasket;

[0017] The gasket is connected with a lead wire, one end of the lead wire is connected to the gasket, and the other end of the lead wire passes through the blocking sponge and is connected to the push rod.

[0018] Optionally, the second driving part is slidably disposed inside the first driving part;

[0019] The second driving part comprises a propulsion tube, which is arranged on the inner side of the inner tube, and the propulsion tube is arranged on a side of the blocking sponge close to the push rod;

[0020] The diameter of the propulsion tube is smaller than the inner cavity diameter of the inner tube, and the propulsion tube is provided with a first wire passing hole along the axial direction.

[0021] Optionally, the gasket is provided with a threading hole, and two threading holes are provided, and the two threading holes are symmetrically arranged about the center of the gasket;

[0022] The end of the lead wire connected to the gasket is inserted into the threading hole, and the threading end of the lead wire is fixed by a wire tightening buckle after passing through the plugging sponge. The wire tightening buckle is arranged on a side of the plugging sponge away from the gasket;

[0023] The tightening buckle is made of biodegradable material, and the lead wire is a wire body made of biodegradable material.

[0024] Optionally, the second expansion member is provided with a receiving cavity at an end portion close to the gasket, and the first expansion member is arranged in the receiving cavity;

[0025] A second wire passing hole is axially arranged on the first expansion member, and a third wire passing hole is axially arranged on the second expansion member. The second wire passing hole is coaxially arranged with the third wire passing hole.

[0026] Optionally, the gasket is a sheet of biodegradable material, and the blocking sponge is a sponge of biodegradable material.

[0027] Optionally, the gasket is an elliptical gasket, the inner cavity cross-section of the outer tube is circular, the major semi-axis of the elliptical gasket is larger than the inner cavity radius of the outer tube, and the minor semi-axis of the elliptical gasket is equal to or smaller than the inner cavity radius of the outer tube.

[0028] Optionally, the outer tube includes a main tube and a handle connected together, and the handle is plugged into the first driving part by a safety pin.

[0029] It can be seen from the above technical scheme that the vascular occluder provided by the utility model, by arranging the occluding sponge into a structure in which the first expansion part and the second expansion part are embedded, and one of the first expansion part and the second expansion part is an axially expanding expansion part, and the other is a radially expanding expansion part, so that the occluding sponge can achieve directional expansion. The two are used in combination, so that after the occluding sponge absorbs body fluids, the axially expanding expansion part has an axial expansion force, and the radially expanding expansion part has a radial expansion force, which can form better pressure on the blood vessel puncture site, have a better occluding effect, realize rapid occlusion of the wound, shorten the hemostasis time, and improve the hemostasis efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic structural diagram of a blood vessel occluder provided by an embodiment of the utility model at one angle;

[0032] Figure 2 A schematic structural diagram of the vascular occluder provided by an embodiment of the utility model from another angle;

[0033] Figure 3 A schematic cross-sectional view of the vascular occluder provided by an embodiment of the utility model along the axis;

[0034] Figure 4 for Figure 3 A schematic diagram of a partial enlarged structure of the sealing sponge and the gasket position;

[0035] Figure 5 A schematic diagram of the use of the vascular occluder provided by the embodiment of the utility model;

[0036] Figure 6 for Figure 5 A schematic diagram of the local enlarged structure of the blocking sponge position;

[0037] Figure 7 A schematic diagram of the structure of the part of the vascular occluder provided by an embodiment of the utility model that remains in the body;

[0038] Figure 8 A schematic diagram of the expansion force of the blocking sponge provided by an embodiment of the utility model after absorbing body fluid;

[0039] Fig. 9 A schematic diagram of the connection structure of the lead provided in the embodiment of the utility model;

[0040] Fig.10 A schematic diagram of the structure of a gasket provided in an embodiment of the utility model;

[0041] Fig.11 A schematic diagram of the cross-sectional structure of the second expansion member provided by an embodiment of the utility model along the axial direction;

[0042] Fig.12 A schematic diagram of a cross-sectional structure of a first expansion member along the axial direction provided in an embodiment of the utility model;

[0043] Fig.13 This is a schematic cross-sectional view of the connection position between the handle and the push rod provided in an embodiment of the utility model.

[0044] in:

[0045] 1. Push rod; 101. Second plug-in hole; 2. Safety pin; 3. Handle; 301. First plug-in hole; 4. Lead wire; 5. Main pipe; 6. Inner pipe; 7. Push pipe; 8. Wire tightening buckle; 9. Sealing sponge; 901. Second expansion piece; 9010. Third wire hole; 9011. Accommodating cavity; 902. First expansion piece; 9020. Second wire hole; 10. Gasket; 1001. Threading hole; 11. Blood vessel; 12. Tissue layer. DETAILED DESCRIPTION

[0046] The utility model discloses a blood vessel occluder, which can form better compression on the blood vessel wound, has better occlusion effect, shortens the hemostasis time and improves the hemostasis efficiency.

[0047] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0048] See also Figures 1 to 7The vascular occluder of the utility model comprises a gasket 10, an occluding sponge 9, a first driving unit and a second driving unit. The gasket 10 is slidably arranged inside the outer tube of the occluder, the occluding sponge 9 is slidably arranged inside the outer tube, and the occluding sponge 9 is arranged at the open end of the gasket 10 away from the outer tube, and the open end of the outer tube is one end thereof for inserting into the blood vessel 11. The first driving unit is slidably arranged inside the outer tube, one end of which is in contact with the gasket 10, and the other end is a force-applying end. The first driving unit is used to push the gasket 10, and push the gasket 10 into the blood vessel 11 when the occluder is in use. The second driving unit is slidably arranged on the inner side of the outer tube, and the end of which is in contact with the occluding sponge 9. The second driving unit is used to push the occluding sponge 9, and push the occluding sponge 9 into the puncture wound of the tissue layer 12 when the occluder is in use. The tissue layer 12 can be a skin layer, a muscle layer, or a superimposed layer of the two.

[0049] The blocking sponge 9 includes a first expansion member 902 and a second expansion member 901, the first expansion member 902 and the second expansion member 901 are interlocked, and the interlocking ends of the two are arranged close to the gasket 10. One of the first expansion member 902 and the second expansion member 901 is an expansion member that expands axially, and the other is an expansion member that expands radially. The blocking sponge 9 is an absorbable hemostatic material sponge with a directional channel. After the sponge absorbs body fluid, it expands in a direction perpendicular to the channel.

[0050] The first expansion piece 902 and the second expansion piece 901 are both absorbable hemostatic material sponges. The different expansion directions of the sponges are determined by their directional channels, and the formation of the directional channels depends on the freezing process during the sponge manufacturing process. This freezing process is a prior art, specifically using a bottom-up temperature field to make ice crystals grow in a directional manner. After the ice crystals sublimate, directional channels will be left behind, which will not be described here. It can be understood that the axially expanding expansion piece has a radial channel, and the radially expanding expansion piece has an axial channel.

[0051] The vascular occluder of the present invention arranges the occluding sponge 9 into a structure in which a first expansion piece 902 and a second expansion piece 901 are interlocked, and one of the first expansion piece 902 and the second expansion piece 901 is an axially expanding expansion piece, and the other is a radially expanding expansion piece, so that the occluding sponge 9 can achieve directional expansion. The two are used in combination, so that after the occluding sponge 9 absorbs body fluids, the axially expanding expansion piece has an axial expansion force, and the radially expanding expansion piece has a radial expansion force, which can form better pressure on the blood vessel puncture site and have a better occluding effect. The problem of unsatisfactory occluding effect caused by the free expansion of the occluding sponge 9 in the prior art is overcome, and rapid occlusion of the wound is achieved, the hemostasis time is shortened, and the hemostasis efficiency is improved.

[0052] In one embodiment, the first expansion member 902 is an axial expansion member, and the second expansion member 901 is a radial expansion member. The first expansion member 902 is embedded in the end of the second expansion member 901 close to the gasket 10. The first expansion member 902 has a radial channel, which can quickly absorb body fluids, expand along the axis perpendicular to the channel, and adhere closely to the blood vessel wound. The second expansion member 901 is located outside and has an axial channel. The second expansion member 901 can expand along the radial direction perpendicular to the channel, so that the wound is completely covered while tightening the first expansion member 902 inside to prevent displacement. Figure 8 The arrow direction in the figure is the expansion direction. The first expansion member 902 and the second expansion member 901 can be collagen sponges.

[0053] Specifically, the first driving part includes a push rod 1 and an inner tube 6 connected together, such as Figure 3 and Figure 4 As shown, the inner tube 6 is sleeved on the inner side of the outer tube, one end of the push rod 1 is arranged on the inner side of the outer tube, and the other end passes through the end of the outer tube and is arranged on the outer side of the outer tube. The end of the inner tube 6 away from the push rod 1 is in contact with the gasket 10, so that when the operator presses the push rod 1, the push rod 1 can drive the inner tube 6 to push the gasket 10 out of the outer tube.

[0054] In order to save space, the end of the inner tube 6 contacts the edge of the gasket 10, and the gasket 10 is arranged close to the open end of the outer tube. The open end of the outer tube is the end of the outer tube close to the blood vessel 11 when the outer tube is in use, so that the inner tube 6 can push the gasket 10 into the blood vessel 11. The gasket 10 is connected to a lead wire 4 near the center, one end of the lead wire 4 is connected to the gasket 10, and the other end passes through the sealing sponge 9 and is connected to the push rod 1. For details, refer to Fig.10 As shown, the reference gasket 10 is provided with a threading hole 1001, and two threading holes 1001 are provided, and the two threading holes 1001 are symmetrically arranged about the center of the gasket 10. The end of the lead 4 connected to the gasket 10 is inserted into the threading hole 1001, and the inserted end of the lead 4 passes through the blocking sponge 9 and is fixed by the tightening buckle 8, as shown in FIG. Fig. 9 As shown, the wire buckle 8 is arranged on the side of the sealing sponge 9 away from the gasket 10. By passing the lead wire 4 through the two symmetrically arranged threading holes 1001 on the gasket 10, it is convenient to stably tighten the gasket 10 to fit the inner wall of the blood vessel 11 through the lead wire 4 after the gasket 10 is placed in the blood vessel 11.

[0055] Among them, the wire buckle 8 is a wire buckle made of biodegradable material, and the wire buckle 8 is a cylindrical structure, preferably absorbable iron, stainless steel, magnesium alloy, etc. The lead 4 is a wire body made of biodegradable material, such as collagen wire, catgut, PLGA, PGA, zinc-magnesium alloy wire or other medical lead wires with good biodegradability and biocompatibility. The gasket 10 is a biodegradable material sheet, which can be polyglycolide lactide, polylactic acid, polyglycolic acid, polycaprolactone, magnesium-zinc alloy or other polymer materials with good biodegradability and biocompatibility. The blocking sponge 9 is a sponge made of biodegradable material, which can be a collagen sponge or a sponge made of other absorbable hemostatic materials.

[0056] In a specific embodiment, the second driving part is slidably arranged inside the first driving part. The second driving part includes a propulsion tube 7, which is arranged inside the inner tube 6, and the propulsion tube 7 is arranged on the side of the blocking sponge 9 close to the push rod 1. In order to facilitate the propulsion tube 7 to slide smoothly onto the blocking sponge 9 under the action of gravity, the diameter of the propulsion tube 7 is smaller than the inner cavity diameter of the inner tube 6. It can be understood that in order to facilitate the connection of the lead 4 with the push rod 1 through the propulsion tube 7, the propulsion tube 7 is axially provided with a first wire hole, and the first wire hole is a through hole arranged along the axial direction of the propulsion tube 7, and the axis of the propulsion tube 7 is arranged to coincide with the axis of the first wire hole.

[0057] In order to facilitate the fitting connection, the second expansion member 901 is provided with a receiving cavity 9011 at the end close to the gasket 10. Fig.11 As shown, the first expansion member 902 is disposed in the accommodating cavity 9011. In order to facilitate the passage of the lead wire 4, a second wire hole 9020 is axially arranged on the first expansion member 902. Fig.12 As shown, a third wire hole 9010 is axially arranged on the second expansion member 901, and the second wire hole 9020 is coaxially arranged with the third wire hole 9010 to facilitate the wire 4 to pass through. The apertures of the second wire hole 9020 and the third wire hole 9010 can be the same or different. Preferably, the apertures of the two are the same, and the aperture size is not less than the spacing between the centers of the two threading holes 1001 on the gasket 10. The total length of the plugging sponge 9 after expansion is not more than 20mm, and the expansion length of the first expansion member 902 is not more than 12mm; the porosity of the plugging sponge 9 is greater than 90%, and the absorbed body fluid should be no less than 20 times its own weight.

[0058] In order to achieve reliable limiting, the gasket 10 is an elliptical gasket, such as Fig.10The inner cavity cross-section of the outer tube is circular, the major semi-axis of the elliptical gasket is larger than the inner cavity radius of the outer tube, and the minor semi-axis of the elliptical gasket is equal to or smaller than the inner cavity radius of the outer tube, so that the gasket 10 can be placed in the inner cavity of the outer tube before use, and after the gasket 10 is placed in the blood vessel 11, the length of the major axis of the gasket 10 is larger than the diameter of the puncture wound, so that the gasket 10 will not slip out of the puncture wound position on the blood vessel 11, thereby ensuring the reliability of the position of the sealing sponge 9 in the puncture wound in the tissue layer 12.

[0059] In order to facilitate holding the outer tube, the outer tube includes a main tube 5 and a handle 3 connected together along the axial direction. Fig.13 As shown, the outer diameter of the handle 3 is larger than the outer diameter of the main tube 5, so that the operator can hold the handle 3 in a convenient position. In order to facilitate the operation of the push rod 1, the handle 3 is arranged close to the push rod 1, and the push rod 1 is slidably sleeved on the end of the handle 3 away from the main tube 5. In order to avoid misoperation of the push rod 1, a first plug hole 301 is radially arranged on the handle 3, and a second plug hole 101 is radially arranged on the push rod 1. The second plug hole 101 is correspondingly connected to the first plug hole 301. The handle 3 and the push rod 1 of the first driving part are positioned by the safety pin 2 inserted in the second plug hole 101 and the first plug hole 301, so as to avoid misoperation of the push rod 1.

[0060] When the vascular occluder of the utility model is used, the occluder is inserted into the puncture wound on the blood vessel 11, the safety pin 2 is removed, the push rod 1 is pressed, and the push rod 1 pushes the gasket 10 from the main tube 5 into the blood vessel 11 through the inner tube 6, and the handle 3 is pulled outward, and the occluding sponge 9 is released from the inner tube 6 under the pull of the lead wire 4 and pressed on the puncture wound of the blood vessel 11. At this time, the pushing tube 7 is also exposed outside the inner tube 6, such as Figure 5 As shown, manually control the push tube 7 to press the wire buckle 8 against the plugging sponge 9 to plug the blood vessel wound. The plugging sponge 9 absorbs the body fluid and expands directionally to achieve a plugging effect on the puncture wound. Finally, the lead wire 4 outside the wire buckle 8 is cut off to complete the operation process. The parts that finally remain in the body include the gasket 10, the plugging sponge 9, part of the lead wire 4 and the wire buckle 8, as shown in FIG. Figure 7 shown.

[0061] In the description of this solution, it should be understood that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this solution.

[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0063] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in this field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A vascular occluder, characterized in that: include: A gasket slidably disposed inside the outer tube of the occluder; A plugging sponge slidably disposed inside the outer tube, wherein the plugging sponge is disposed at an opening end of the gasket away from the outer tube; A first driving part is slidably disposed in the outer tube and in contact with the gasket; A second driving part is slidably disposed in the outer tube and in contact with the blocking sponge; The blocking sponge includes a first expansion piece and a second expansion piece, the first expansion piece is embedded with the second expansion piece, and the embedded ends of the two are arranged close to the gasket. One of the first expansion piece and the second expansion piece is an axially expanding expansion piece, and the other is a radially expanding expansion piece.

2. The vascular occluder according to claim 1, characterized in that: The first expansion member is an axial expansion member, and the second expansion member is a radial expansion member; The first expansion member is embedded in the end portion of the second expansion member close to the gasket.

3. The vascular occluder according to claim 1, characterized in that: The first driving part includes a push rod and an inner tube connected together, the inner tube is sleeved on the inner side of the outer tube, one end of the push rod is arranged on the inner side of the outer tube, and the other end passes through the end of the outer tube and is arranged on the outer side of the outer tube, and the end of the inner tube away from the push rod is in contact with the gasket.

4. The vascular occluder according to claim 3, characterized in that: The end of the inner tube contacts the edge of the gasket; The gasket is connected with a lead wire, one end of the lead wire is connected to the gasket, and the other end of the lead wire passes through the blocking sponge and is connected to the push rod.

5. The vascular occluder according to claim 4, characterized in that: The second driving part is slidably disposed inside the first driving part; The second driving part comprises a propulsion tube, which is arranged on the inner side of the inner tube, and the propulsion tube is arranged on a side of the blocking sponge close to the push rod; The diameter of the propulsion tube is smaller than the inner cavity diameter of the inner tube, and the propulsion tube is provided with a first wire passing hole along the axial direction.

6. The vascular occluder according to claim 4, characterized in that: The gasket is provided with a threading hole, and two threading holes are provided, and the two threading holes are symmetrically arranged about the center of the gasket; The end of the lead wire connected to the gasket is inserted into the threading hole, and the threading end of the lead wire is fixed by a wire tightening buckle after passing through the plugging sponge. The wire tightening buckle is arranged on a side of the plugging sponge away from the gasket; The wire buckle is made of biodegradable material, and the lead wire is made of biodegradable material.

7. The vascular occluder according to claim 4, characterized in that: The second expansion member is provided with a receiving cavity at an end portion close to the gasket, and the first expansion member is arranged in the receiving cavity; A second wire passing hole is axially arranged on the first expansion member, a third wire passing hole is axially arranged on the second expansion member, and the second wire passing hole is coaxially arranged with the third wire passing hole.

8. The vascular occluder according to claim 1, characterized in that: The gasket is a sheet of biodegradable material, and the blocking sponge is a sponge of biodegradable material.

9. The vascular occluder according to any one of claims 1 to 8, characterized in that: The gasket is an elliptical gasket, the inner cavity cross section of the outer tube is circular, the major semi-axis of the elliptical gasket is greater than the inner cavity radius of the outer tube, and the minor semi-axis of the elliptical gasket is equal to or less than the inner cavity radius of the outer tube.

10. The vascular occluder according to claim 1, characterized in that: The outer tube comprises a main tube and a handle connected together, and the handle is plugged with the first driving part by a safety pin.

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