Puncture trocar assembly for intracavity treatment of vein malformation

Abstract

The utility model discloses a puncture trocar assembly for intracavity treatment of vein malformation, which comprises a needle body and a protective sleeve detachably sleeved on the needle body, and the protective sleeve is divided into an inner sleeve and an outer sleeve; the inner-layer sleeve is of a round sleeve structure and is provided with a needle penetrating hole penetrating in the axial direction of the inner-layer sleeve, the needle body is detachably inserted into the needle penetrating hole in a matched mode, and the needle outlet end of the inner-layer sleeve is connected with a tightening structural body capable of expanding and contracting in the radial direction. The outer-layer sleeve is of a round sleeve structure and detachably matched with the inner-layer sleeve in a sleeved mode, and when limiting is needed, namely when the needle body punctures into a focus, the outer-layer sleeve and the structure body capable of being tightened are staggered so that the structure body capable of being tightened can be in a radial unfolding state.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a puncture trocar used for intracavitary treatment of venous malformations. Background Art

[0002] Venous malformation (VM), formerly known as cavernous hemangioma, is a venous vascular structural malformation caused by abnormal development of veins. The pathological manifestations are dilated vascular sinuses ranging from capillaries to cavities, and the inner wall of the cavity is lined with normal flat endothelial cells. Under the endothelial cells is a single layer of basement membrane. The lumen wall of the blood sinus has sparse smooth muscle and the outer membrane fiber is degenerated. Venous malformation can affect any part of the body, but it is most common in the head and neck, which can cause obvious appearance deformity and organ displacement; huge lesions can also cause abnormal development of facial bones. In venous malformations of the limbs and trunk, especially diffuse lesions, thrombosis in the lesion will occur due to slow blood flow and stasis, which can cause varying degrees of pain and even functional impairment. Therefore, lesions on the head, face and limbs accompanied by pain should be treated as soon as possible to control further development of the disease. Currently, the mainstream treatment method internationally is intravascular sclerotherapy, which uses anhydrous ethanol, bleomycin (bleomycin), and foam sclerosants (polydocanol, lauromacrogol, sodium tetradecyl sulfate) to destroy vascular endothelial cells, causing fibrosis and occlusion of the diseased blood vessels and atrophy of their volume, thereby achieving recovery of appearance and function with a low probability of recurrence.

[0003] The main treatment process is as follows: In the DSA operating room, the patient is given general anesthesia. After successful anesthesia, the lesion is disinfected and exposed to the field of vision, the lesion is located under ultrasound, the malformed vascular cavity of the lesion is explored, and then a common puncture trocar is used to puncture the lesion under ultrasound guidance. Slow venous blood is seen flowing out, confirming that the trocar is in the vascular lumen, then the metal needle core in the trocar is pulled out, and a small syringe is used to inject iodine contrast agent from the plastic cannula retained in the vascular lumen. Under DSA, confirm that the cannula is in the vascular malformation lesion cavity. Then, a foam hardener or anhydrous ethanol or bleomycin is slowly injected intravenously into the lesion, and then ultrasound is used to confirm that the lumen is contracted and closed. After the treatment, the puncture point is compressed for a while, and local braking is applied for one day. The affected area should be higher than the heart position to allow the swelling to subside.

[0004] The current problems are: the trocar is a common trocar. When the metal puncture needle is pulled out, the plastic trocar can easily slip out of the blood vessel cavity because there is no fixing device at the head end. Because the syringe needs to be inserted into the tail of the trocar for angiography, and then the syringe is pulled out, and then the hardener or anhydrous alcohol is injected through the tail of the trocar, the plastic trocar can easily be pulled out or slipped out during repeated insertion and removal. Once the plastic trocar slips out, the subsequent injection of the hardener will not be possible. This greatly delays the progress of the operation, prolongs the operation time, and sometimes even makes it impossible to accurately insert the trocar into the lesion blood vessel cavity again, thereby reducing the surgical effect and increasing the difficulty of the operator. Utility Model Content

[0005] The utility model aims to provide a puncture trocar assembly for intracavitary treatment of venous malformation, thereby preventing the slipping phenomenon produced in the prior art.

[0006] The purpose of the utility model is achieved as follows: a puncture trocar needle assembly for intracavitary treatment of venous malformation, comprising a needle body and a protective tube sleeve detachably sleeved on the needle body, wherein the protective tube sleeve is divided into an inner tube sleeve and an outer tube sleeve;

[0007] The inner sleeve is configured as a circular sleeve structure, which has a needle hole extending through the inner sleeve in its axial direction, the needle body can be detachably inserted into the needle hole, and the needle outlet end of the inner sleeve is connected to a radially expandable and retractable tightenable structure;

[0008] The outer sleeve is configured as a circular sleeve structure and can be detachably fitted with the inner sleeve. When position limiting is required, the outer sleeve is staggered with the tightenable structure so that the tightenable structure is in a radially expanded state.

[0009] Furthermore, when position limiting is not required, the outer sleeve completely covers the tightenable structure to put the tightenable structure in a contracted state.

[0010] Furthermore, the tightenable structure is configured as an umbrella-shaped structure, and its wide end faces the needle outlet end of the inner sleeve.

[0011] Furthermore, an axial limit seat protruding in the radial direction is provided on the outer side of the needle insertion end of the inner sleeve.

[0012] Furthermore, the axial length of the inner sleeve is greater than that of the outer sleeve, and the outer sleeve is relatively slidably sleeved on the pipe section of the inner sleeve between the tightenable structure and the axial limit seat.

[0013] Furthermore, the tightenable structure is made of elastic material.

[0014] The beneficial effects of the utility model are:

[0015] When the needle punctures into the lesion, the outer sheath is withdrawn, allowing the tightenable structure of the inner sheath to expand radially and get stuck at the puncture point entering the blood vessel cavity, thereby achieving a fixing effect. When injecting iodine contrast agent and hardening agent, it is only necessary to gently lift the inner sheath. After the injection is completed, the outer sheath is moved to put the tightenable structure into the outer sheath, and the entire assembly can be pulled out of the body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the general assembly drawing of the utility model.

[0017] Figure 2 It is a comparison diagram of the use status of the utility model.

[0018] Figure 3 It is an exploded view of the utility model. DETAILED DESCRIPTION

[0019] The following will be combined with the attached embodiment of the present utility model Figure 1-3 , 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 them. Based on the embodiments of 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.

[0020] like Figure 1 , 3 As shown, a puncture trocar needle assembly for intracavitary treatment of venous malformations includes a needle body 3 and a protective tube sleeve that can be detachably mounted on the needle body 3, the protective tube sleeve is divided into an inner sleeve 1 and an outer sleeve 2, and the end of the needle body 3 is integrally connected with a handle 4 so that medical staff can hold the handle 4 to control the telescopic state of the needle body 3.

[0021] The inner sleeve 1 is a circular sleeve structure having a needle hole 13 extending axially therethrough. The needle body 3 can be detachably inserted into the needle hole 13. The needle outlet end of the inner sleeve 1 is connected to a radially expandable and retractable tightening structure 11, which is made of elastic material.

[0022] The outer sleeve 2 is configured as a circular sleeve structure and can be detachably fitted with the inner sleeve 1 .

[0023] like Figure 2As shown, when limiting is required, the outer sleeve 2 and the tightenable structure 11 are staggered so that the tightenable structure 11 is in a radially expanded state; when the needle body 3 punctures into the lesion, the outer sleeve 2 is withdrawn, and under the effect of rebound, the tightenable structure 11 of the inner sleeve 1 is radially expanded and stuck at the puncture point entering the blood vessel cavity, which plays a fixing effect. When injecting iodine contrast agent and hardening agent, it is only necessary to gently lift the inner sleeve 1. When the injection is completed, the outer sleeve 2 is moved to put the tightenable structure 11 into the outer sleeve 2, and the entire assembly can be pulled out of the body together.

[0024] When position limitation is not required, including in a packaging state and a non-use state, the outer sleeve 2 completely covers the tightenable structure 11 so that the tightenable structure 11 is in a contracted state.

[0025] The tightenable structure 11 is configured as an umbrella-shaped structure, and its wide end faces the needle outlet end of the inner sleeve 1 .

[0026] An axial limit seat 12 protruding radially is provided on the outer side of the needle entry end of the inner sleeve 1. The axial length of the inner sleeve 1 is greater than the axial length of the outer sleeve 2, which is approximately several centimeters longer, and is not specifically limited here. The outer sleeve 2 is relatively slidably sleeved on the tube section of the inner sleeve 1 between the tightenable structure 11 and the axial limit seat 12.

[0027] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "front", "back", etc. indicate directions or positional relationships based on the directions 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention; in the present invention, it should also be noted that the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integrally formed connection, a mechanical connection, or an indirect connection through an intermediate connecting component, and the specific meaning of the terms in the present invention can be understood according to the specific circumstances.

[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A puncture trocar assembly for intracavitary treatment of venous malformations, comprising a needle body (3) and a protective sleeve detachably fitted around the needle body (3), characterized in that: The protective sleeve is divided into an inner sleeve (1) and an outer sleeve (2); The inner sleeve (1) is a circular sleeve structure having a needle hole (13) extending through the inner sleeve along its axial direction, the needle body (3) can be detachably inserted into the needle hole (13), and the needle outlet end of the inner sleeve (1) is connected to a radially expandable and retractable tightenable structure (11); The outer sleeve (2) is configured as a circular sleeve structure and can be detachably fitted onto the inner sleeve (1). When position limiting is required, the outer sleeve (2) and the tightenable structure (11) are staggered so that the tightenable structure (11) is in a radially expanded state.

2. A puncture trocar assembly for intracavitary treatment of venous malformations according to claim 1, characterized in that: When position limiting is not required, the outer sleeve (2) completely covers the tightenable structure (11) so that the tightenable structure (11) is in a contracted state.

3. The puncture trocar assembly for endovascular treatment of venous malformations according to claim 1, characterized in that: The tightenable structure (11) is configured as an umbrella-shaped structure, with its wide end facing the needle outlet end of the inner sleeve (1).

4. A puncture trocar assembly for intracavitary treatment of venous malformation according to claim 3, characterized in that: An axial limiting seat (12) protruding in the radial direction is provided on the outer side of the needle insertion end of the inner sleeve (1).

5. A puncture trocar assembly for endovascular treatment of venous malformations according to claim 4, characterized in that: The axial length of the inner sleeve (1) is greater than the axial length of the outer sleeve (2), and the outer sleeve (2) is relatively slidably sleeved on the pipe section of the inner sleeve (1) between the tightenable structure (11) and the axial limit seat (12).

6. A puncture trocar assembly for intracavitary treatment of venous malformations according to any one of claims 1 to 5, characterized in that: The tightenable structure (11) is made of elastic material.

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