Ultrasonic guide puncture support for internal arteriovenous fistula

Abstract

The utility model discloses an internal arteriovenous fistula ultrasonic guide puncture support which comprises a first clamp arm, a second clamp arm and an elastic piece, and the first clamp arm and the second clamp arm are hinged to each other to form a closed state or an open state. A first forceps arm and a second forceps arm which can be fixed on an ultrasonic probe are arranged, and a first guide part and a second guide part which are used for guiding a puncture needle to puncture are respectively arranged on the first forceps arm and the second forceps arm; the first guide part and the second guide part are respectively provided with a guide groove which corresponds to each other and is used for guiding the butterfly wings of the puncture needle to slide at the same time, so that under the guiding action of the guide grooves, a nurse can carry out fool type puncture, and the requirement on experience is reduced; the puncture needle can be accurately guided to pierce blood vessels in the human skin below the ultrasonic probe, meanwhile, the puncture needle has various puncture depths by arranging a plurality of guide grooves with different inclination angles, and the guide grooves with different angles can be selected according to the actual situation to adapt to the blood vessel depths of different patients; and finally, the puncture accuracy and the success rate of the puncture needle are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to an arteriovenous fistula ultrasound-guided puncture stent. Background Art

[0002] Arteriovenous fistula is a minor surgery for vascular anastomosis. The artery near the wrist of the forearm and the adjacent vein are sutured so that arterial blood flows in the anastomosed vein, forming an arteriovenous fistula. It is mainly used for hemodialysis treatment and is a common vascular access for maintenance hemodialysis patients. During the hemodialysis process, patients generally need to insert two puncture needles into the artificial blood vessels forming the fistula, one for blood drawing and the other for blood return. The blood is first transported to the dialysis machine for blood purification using the blood drawing needle, and then the blood is returned to the human body through the blood return needle, so that the blood forms a circulation and completes the entire hemodialysis.

[0003] Among them, fistulas are usually punctured by nurses, and they are basically blind, resulting in a high failure rate of puncture, especially for special patients with thick fat and deep blood vessels. They must cooperate with ultrasound probes to successfully complete the puncture. First, the ultrasound probe is used to determine the location of the blood vessels, and then the fistula puncture is performed under the guidance of the ultrasound probe to improve the success rate of the fistula puncture. There is a problem here. Nurses generally do not know how to use ultrasound. They often need experienced doctors to teach them how to cooperate with ultrasound for fistula puncture. This is very demanding for nurses, and it often takes a long time to learn and operate before they can master it. In addition, because the depth of blood vessels from the skin surface of different patients is different, the puncture depth of the puncture needle is also different, which also increases the experience requirements for nurses.

[0004] Therefore, how to design a guiding puncture device with a puncture guiding function so that nurses can perform fool-proof puncture to reduce the experience requirements, while also having a variety of puncture depths to adapt to different patients, is a problem that technical personnel in this field urgently need to solve. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a novel structure with a puncture guidance function in response to the above-mentioned existing technical status, so that nurses can perform fool-style puncture to reduce the requirement for experience, and at the same time have a variety of puncture depths to adapt to the ultrasound-guided puncture stent of arteriovenous fistula of different patients.

[0006] The technical solution adopted by the utility model to solve the above technical problems is as follows: the arteriovenous fistula ultrasound-guided puncture bracket comprises a first clamp arm, a second clamp arm and an elastic member, the first clamp arm and the second clamp arm are hinged to each other to form a closed state or an open state, the elastic member can drive the first clamp arm and the second clamp arm to always be in a closed state, the first clamp arm and the second clamp arm can be fixed on an ultrasonic probe for assisting puncture in the closed state, the first clamp arm and the second clamp arm are respectively provided with a first guide part and a second guide part for guiding the puncture needle to puncture at the ends away from the hinged part of the first clamp arm and the second clamp arm, the first guide part and the second guide part are both provided with guide grooves corresponding to each other for sliding guidance of the butterfly wing of the puncture needle, the guide groove is inclined from the edge of the first guide part or the second guide part to obliquely downward to guide the puncture needle to puncture the human blood vessel located below the ultrasonic probe, the first guide part and the second guide part are both provided with a plurality of guide grooves, and the inclination angle of each guide groove is different.

[0007] In order to optimize the overall structure of the first guide portion and the second guide portion so that the puncture needle can be more conveniently inserted between the first guide portion and the second guide portion, preferably, when the first clamp arm and the second clamp arm are in a closed state, the first guide portion and the second guide portion are arranged opposite to each other and a insertion space for the puncture needle to pass through is formed therebetween.

[0008] In order to better form the penetration space, preferably, the first guide portion is inclined from the end of the first clamp arm toward the outer side away from the second clamp arm, and correspondingly, the second guide portion is inclined from the end of the second clamp arm toward the outer side away from the first clamp arm, and the angle space generated between the first guide portion and the second guide portion forms the aforementioned penetration space.

[0009] In order to enable doctors to control the puncture depth more accurately and enable doctors to select the most suitable guide groove according to the specific blood vessel depth of the patient, preferably, the guide groove includes a first guide groove, a second guide groove and a third guide groove, the bottoms of the first guide groove, the second guide groove and the third guide groove are arranged flush, the inclination angle a of the first guide groove in the horizontal direction is 30°, the inclination angle b of the second guide groove in the horizontal direction is 45°, and the inclination angle c of the third guide groove in the horizontal direction is 60°.

[0010] In order to optimize the specific structure of the elastic member so that it can more conveniently drive the first clamp arm and the second clamp arm to always be in a closed state, preferably, the elastic member is a torsion spring, and the first clamp arm and the second clamp arm are hinged together by setting a pin shaft. The torsion spring is passed through the pin shaft and is located between the first clamp arm and the second clamp arm to drive the first clamp arm and the second clamp arm to always be in a closed state.

[0011] In order to facilitate the first clamp arm and the second clamp arm to open to each other, preferably, the first clamp arm and the second clamp arm are also connected to the first clamp handle and the second clamp handle respectively, the first clamp handle and the first clamp arm are respectively located on both sides of the hinged part, and the second clamp handle and the second clamp arm are also respectively located on both sides of the hinged part, and the first clamp arm and the second clamp arm can be driven to form an open state by driving the first clamp handle and the second clamp handle to close.

[0012] Compared with the prior art, the utility model has the advantages that: by providing a first clamp arm and a second clamp arm that can be fixed on the ultrasonic probe, and by providing a first guide part and a second guide part for guiding the puncture needle to puncture respectively on the first clamp arm and the second clamp arm, and the first guide part and the second guide part are provided with guide grooves corresponding to each other for the butterfly wings of the puncture needle to slide and guide at the same time, under the guiding action of the guide groove, the nurse can perform fool-style puncture and reduce the requirement for experience, and can accurately guide the puncture needle to puncture the blood vessel in the human skin below the ultrasonic probe, and at the same time, by providing a plurality of guide grooves with different inclination angles, the puncture needle has a variety of puncture depths, and according to actual conditions, guide grooves of different angles can be selected to adapt to the blood vessel depths of different patients, ultimately improving the puncture accuracy and success rate of the puncture needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of this embodiment (the first clamp arm and the second clamp arm are in a closed state);

[0014] Figure 2 is a schematic diagram of the three-dimensional structure of this embodiment (the first clamp arm and the second clamp arm are in an open state);

[0015] Figure 3 It is a schematic diagram of the three-dimensional exploded structure of this embodiment;

[0016] Figure 4 It is a side orthographic projection view of this embodiment;

[0017] Figure 5 Schematic diagram of the structure in which the first clamp arm and the second clamp arm are fixed on the ultrasonic probe in this embodiment (where A refers to the ultrasonic probe and B refers to the puncture needle);

[0018] Figure 6 Schematic diagram of the structure of the puncture needle inserted into the guide groove in this embodiment (wherein the direction indicated by the arrow C is the insertion direction of the puncture needle). DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0020] Figures 1 to 6What is shown is a schematic diagram of this embodiment. The arteriovenous fistula ultrasound-guided puncture stent in this embodiment includes a first clamp arm 1, a second clamp arm 2, an elastic member, and the like.

[0021] refer to Figure 1 , Figure 2 and Figure 5 As shown, in this embodiment, the first clamp arm 1 and the second clamp arm 2 are hinged to each other to form a closed state or an open state, and the elastic member can drive the first clamp arm 1 and the second clamp arm 2 to always be in a closed state. The first clamp arm 1 and the second clamp arm 2 can be fixed on the ultrasonic probe A for auxiliary puncture in the closed state, characterized in that: the first clamp arm 1 and the second clamp arm 2 are respectively provided with a first guide portion 1a and a second guide portion 2a at the ends away from the hinged portion for guiding the puncture needle B to puncture, and the first guide portion 1a and the second guide portion 2a are both provided with guide grooves 3 corresponding to each other for sliding guidance of the butterfly wing B1 of the puncture needle B, and the guide groove 3 is inclined from the edge of the first guide portion 1a or the second guide portion 2a to obliquely downward to guide the puncture needle B to puncture the human blood vessel located below the ultrasonic probe A, and the first guide portion 1a and the second guide portion 2a are both provided with a plurality of guide grooves 3, and the inclination angle of each guide groove 3 is different.

[0022] It is necessary to explain additionally here that, in the present embodiment, in order to enable fool-proof puncture and reduce the requirement for experience, and to accurately guide the puncture needle B to puncture the blood vessel in the human skin below the ultrasonic probe A, a plurality of guide grooves 3 with different inclination angles are provided so that the puncture needle B has a variety of puncture depths. According to the actual situation of the patient, guide grooves 3 with different angles can be selected to adapt to the blood vessel depths of different patients, thereby ultimately improving the puncture accuracy and success rate of the puncture needle B. When the puncture is completed, it is only necessary to remove the puncture guide device.

[0023] In order to optimize the overall structure of the first guide portion 1a and the second guide portion 2a, so that the puncture needle A can be more conveniently inserted between the first guide portion 1a and the second guide portion 1a, refer to Figure 1 As shown, in this embodiment, when the first forceps arm 1 and the second forceps arm 2 are in a closed state, the first guide portion 1a and the second guide portion 2a are arranged opposite to each other and a penetration space 4 for the puncture needle B to pass through is formed therebetween.

[0024] Secondly, in order to better form the penetration space 4, the first guide portion 1a in the present embodiment is inclined from the end of the first clamp arm 1 toward the outer side away from the second clamp arm 2, and correspondingly, the second guide portion 2a is inclined from the end of the second clamp arm 2 toward the outer side away from the first clamp arm 1, and the angle space generated between the first guide portion 1a and the second guide portion 2a forms the penetration space 4.

[0025] In addition, in order to enable the doctor to more accurately control the puncture depth of the puncture needle and enable the doctor to select the most suitable guide groove to insert the puncture needle according to the specific depth of the blood vessels under the skin of different patients, in this embodiment, the guide groove 3 includes a first guide groove 3a, a second guide groove 3b and a third guide groove 3c, and the bottoms of the first guide groove 3a, the second guide groove 3b and the third guide groove 3c are arranged flush, and the inclination angle a of the first guide groove 3a in the horizontal direction is 30°, the inclination angle b of the second guide groove (3b) in the horizontal direction is 45°, and the inclination angle c of the third guide groove 3c in the horizontal direction is 60°. For specific settings, please refer to Figure 4 Schematic diagram shown.

[0026] In this embodiment, in order to optimize the specific structure of the elastic member so that the elastic member can better drive the first clamp arm 1 and the second clamp arm 2 to always be in a closed state, so that the first clamp arm 1 and the second clamp arm 2 can be more firmly fixed on the ultrasonic probe A, refer to Figure 3 and Figure 5 As shown, the elastic member here is a torsion spring 6, and the first clamp arm 1 and the second clamp arm 2 are hinged together by setting a pin shaft 5. The torsion spring is passed through the pin shaft 5 and is located between the first clamp arm 1 and the second clamp arm 2 to drive the first clamp arm 1 and the second clamp arm 2 to always be in a closed state.

[0027] In this embodiment, in order to better control the first clamp arm 1 and the second clamp arm 2 to open each other, refer to Figures 1 to 3 As shown, the first clamp arm 1 and the second clamp arm 2 are also connected to the first clamp handle 1b and the second clamp handle 2b respectively. The first clamp handle 1b and the first clamp arm 1 are respectively located on both sides of the hinged part, and the second clamp handle 2b and the second clamp arm 2 are also respectively located on both sides of the hinged part. The first clamp arm 1 and the second clamp arm 2 can be driven to form an open state by driving the first clamp handle 1b and the second clamp handle 2b to close.

[0028] It should be noted that in the description of this embodiment, the terms "front, back", "left, right", "inside, outside", "upper, lower" and the like indicating directions or positional relationships are all 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. The terms "install", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An ultrasound-guided puncture stent for arteriovenous fistula, comprising a first clamp arm (1), a second clamp arm (2) and an elastic member, wherein the first clamp arm (1) and the second clamp arm (2) are hinged to each other to form a closed state or an open state, and the elastic member can drive the first clamp arm (1) and the second clamp arm (2) to always be in a closed state, and the first clamp arm (1) and the second clamp arm (2) can be fixed on an ultrasonic probe (A) for assisting puncture in the closed state, characterized in that: The first guide portion (1a) and the second guide portion (2a) are respectively provided at the ends of the first clamp arm (1) and the second clamp arm (2) away from the hinged portion for guiding the puncture needle (B) to puncture. The first guide portion (1a) and the second guide portion (2a) are both provided with guide grooves (3) corresponding to each other for guiding the butterfly wing (B1) of the puncture needle (B) to slide. The guide groove (3) is inclined downward from the edge of the first guide portion (1a) or the second guide portion (2a) to guide the puncture needle (B) to puncture the human blood vessel located below the ultrasonic probe (A). The first guide portion (1a) and the second guide portion (2a) are both provided with a plurality of guide grooves (3), and the inclination angles of each guide groove (3) are different. When the first clamp arm (1) and the second clamp arm (2) are in a closed state, the first guide portion (1a) and the second guide portion (2a) are arranged opposite to each other and a penetration space (4) for a puncture needle (B) to pass through is formed therebetween; the guide groove (3) comprises a first guide groove (3a), a second guide groove (3b) and a third guide groove (3c); the bottoms of the first guide groove (3a), the second guide groove (3b) and the third guide groove (3c) are arranged flush with each other; the inclination angle a of the first guide groove (3a) in the horizontal direction is 30°, the inclination angle b of the second guide groove (3b) in the horizontal direction is 45°, and the inclination angle c of the third guide groove (3c) in the horizontal direction is 60°.

2. The arteriovenous fistula ultrasound-guided puncture stent according to claim 1, characterized in that: The first guide portion (1a) is inclined from the end of the first clamp arm (1) toward the outer side away from the second clamp arm (2), and correspondingly, the second guide portion (2a) is inclined from the end of the second clamp arm (2) toward the outer side away from the first clamp arm (1), and the angle space generated between the first guide portion (1a) and the second guide portion (2a) forms the aforementioned penetration space (4).

3. The arteriovenous fistula ultrasound-guided puncture stent according to any one of claims 1 or 2, characterized in that: The elastic member is a torsion spring (6); the first clamp arm (1) and the second clamp arm (2) are hinged together by arranging a pin shaft (5); the torsion spring is passed through the pin shaft (5) and is located between the first clamp arm (1) and the second clamp arm (2) to drive the first clamp arm (1) and the second clamp arm (2) to always be in a closed state.

4. The ultrasound-guided puncture stent for arteriovenous fistula according to claim 3, characterized in that: The first clamp arm (1) and the second clamp arm (2) are also connected to a first clamp handle (1b) and a second clamp handle (2b) respectively. The first clamp handle (1b) and the first clamp arm (1) are respectively located on both sides of the hinged portion. The first clamp handle (1b) is inclined from the hinged portion to the outside away from the second clamp arm (2). The second clamp handle (2b) and the second clamp arm (2) are also respectively located on both sides of the hinged portion. The second clamp handle (2b) is inclined from the hinged portion to the outside away from the first clamp arm (1). By driving the first clamp handle (1b) and the second clamp handle (2b) to close, the first clamp arm (1) and the second clamp arm (2) can be driven to form an open state.

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