Improved disposable internal arteriovenous fistula puncture needle

Abstract

The utility model discloses an improved disposable internal arteriovenous fistula puncture needle, and relates to the technical field of puncture needles. The utility model comprises a guide tube, wherein a needle head is arranged at one end of the guide tube. During use, after a user inserts the needle head into a blood vessel of a patient, blood in the blood vessel flows into the guide tube through the needle head, and meanwhile, under the action of the first communication mechanism, one end of the guide tube is in a sealed state, so that the air pressure in the guide tube is increased; at the moment, the pressure sensor transmits pressure change information to a matched receiving device, a user can confirm that the needle head is inserted into the blood vessel after obtaining the index change information of the pressure sensor through the receiving device, and therefore the phenomenon that when the needle head is inserted into the blood vessel with low pressure, the needle head is damaged is avoided. Even if the internal arteriovenous fistula puncture needle is inserted into a blood vessel, blood return does not occur, so that the situation that medical staff accidentally pierces the opposite-side blood vessel wall is caused, and the practicability of the device is fully embodied.

Description

Technical Field

[0001] The utility model relates to the technical field of puncture needles, in particular to an improved disposable arteriovenous fistula puncture needle. Background Art

[0002] An arteriovenous fistula puncture needle is a medical device used to establish an arteriovenous fistula (AVF), which is a vascular pathway that directly connects an artery to a vein. It is often used in dialysis treatment to facilitate the drainage of the patient's blood to the dialysis machine for purification.

[0003] After the arteriovenous fistula puncture needle is inserted into a blood vessel, due to different blood vessel pressures, blood can be seen flowing out of the pipe faster in the high-pressure vessels, while blood vessels with low pressure will not have blood return even if the arteriovenous fistula puncture needle is inserted into the blood vessel, especially in small blood vessels. By the time the medical staff sees blood and stops inserting the needle, the opposite blood vessel wall has already been pierced, which will cause unnecessary pain to the patient. Therefore, a new improved disposable arteriovenous fistula puncture needle is needed to solve the above problems. Utility Model Content

[0004] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0005] An improved disposable arteriovenous fistula puncture needle comprises: a guide tube, one end of which is provided with a needle, a connecting mechanism, the connecting mechanism being used to connect the needle and the guide tube, a first connecting mechanism, the first connecting mechanism being used to connect the guide tube and the blood inlet end of a dialysis machine and seal one end of the guide tube when not connected to the blood inlet end of the dialysis machine, an extension end being provided on the surface of the guide tube, one end of the extension end being provided with a pressure sensor, a second connecting mechanism and a fixing mechanism, the second connecting mechanism being used to connect the pressure sensor and the extension end, the fixing mechanism being used to fix the guide tube on the surface of the patient's skin.

[0006] Furthermore, the connecting mechanism includes a connecting tube fixedly mounted on one end of the guide tube, a rubber ring fixedly mounted on the inner wall of the connecting tube, a cannula slidably inserted into the inner wall of the rubber ring, and the other end of the cannula fixedly mounted on one end of the needle.

[0007] Furthermore, the first connecting mechanism comprises a connecting tube sleeved on the surface of the guide tube, one end of the connecting tube is rotatably connected with an outlet blood vessel, the surface of the outlet blood vessel is threadedly sleeved with a sealing tube and the inner wall is provided with a thread groove.

[0008] Furthermore, the second connecting mechanism comprises an externally threaded tube fixedly mounted on one end of the extension end, an internally threaded tube is threadedly sleeved on the surface of the externally threaded tube, and one end of the pressure sensor is fixedly mounted on one end of the internally threaded tube.

[0009] Furthermore, the fixing mechanism includes two fixing plates both fixedly mounted on the surface of the guide tube, and medical tape is fixedly mounted on the surfaces of the two fixing plates.

[0010] The beneficial effects of the utility model are as follows:

[0011] 1. When the utility model is in use, after the user inserts the needle into the patient's blood vessel, the blood inside the blood vessel will flow into the guide tube through the needle. At the same time, because one end of the guide tube is in a sealed state under the action of the first connecting mechanism, the air pressure inside it will increase. At this time, the pressure sensor will transmit the information of the pressure change to the matching receiving device. After the user obtains the message of the pressure sensor index change through the receiving device, it can be confirmed that the needle has been inserted into the blood vessel, thereby avoiding the situation that when inserting into a low-pressure blood vessel, even if the arteriovenous fistula puncture needle is inserted into the blood vessel, there will be no blood return, which will cause the medical staff to accidentally pierce the opposite blood vessel wall, which fully reflects the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0013] Figure 2 It is a partial schematic diagram of a partial cross-sectional view of the utility model;

[0014] Figure 3 It is a partial schematic diagram of a partial cross-sectional view of the utility model from another angle;

[0015] Figure 4 It is a partial schematic diagram of a partial cross-sectional view of the utility model from another angle.

[0016] Figure numerals: 1. guide tube; 2. needle; 3. connecting mechanism; 301. connecting tube; 302. rubber ring; 303. cannula; 4. first connecting mechanism; 401. connecting tube; 402. blood outlet tube; 403. sealing tube; 5. extension end; 6. pressure sensor; 7. second connecting mechanism; 701. external threaded tube; 702. internal threaded tube; 8. fixing mechanism; 801. fixing plate; 802. medical tape. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0018] The present application provides an improved disposable arteriovenous fistula puncture needle, which is mainly used to solve the problem that after the arteriovenous fistula puncture needle is inserted into a blood vessel, because different blood vessels have different pressures, blood can be seen flowing out of the pipe faster in the high-pressure blood vessel, while blood vessels with low pressure will not have blood return even if the arteriovenous fistula puncture needle is inserted into the blood vessel, especially for small blood vessels. If the medical staff stops inserting the needle after seeing the blood, the opposite blood vessel wall has been pierced, which will cause unnecessary pain to the patient, and the following technical solutions are provided. Figure 1-Figure 4 Make a detailed description:

[0019] The improved disposable arteriovenous fistula puncture needle comprises: a guide tube 1 with a needle 2 at one end, the user can achieve the connection between the needle 2 and one end of the guide tube 1 through a connecting mechanism 3, and also comprises a first connecting mechanism 4, the first connecting mechanism 4 is used to connect the guide tube 1 and the blood inlet end of the dialysis machine and seal one end of the guide tube 1 when it is not connected with the blood inlet end of the dialysis machine, the surface of the guide tube 1 is provided with an extension end 5, one end of the extension end 5 is provided with a pressure sensor 6, the user can connect the pressure sensor 6 and the extension end 5 through the first connecting mechanism 4, and the user can also fix the guide tube 1 on the surface of the patient's skin through a fixing mechanism 8 to ensure the stability of the bleeding process, wherein the main components of the connecting mechanism 3 are: a connecting tube 301 fixedly installed at one end of the guide tube 1, a rubber ring 302 fixedly installed on the inner wall of the connecting tube 301, the user inserts the connecting tube 301 fixedly installed at one end of the needle 2 into the rubber ring 302, and squeezes the rubber ring 302 at the same time to achieve the limitation of the insertion tube 303, such as In this way, the installation of the needle 2 can be achieved, wherein the main components of the first connecting mechanism 4 are: a connecting tube 401 sleeved on the surface of the guide tube 1, one end of the connecting tube 401 is rotatably plugged with an outlet blood vessel 402, the inner wall of the tube is provided with a threaded groove for connecting to the blood inlet end of the dialysis machine, and at the same time, the surface of the outlet blood vessel 402 is threadedly sleeved with a sealing tube 403 for sealing it, wherein the main components of the second connecting mechanism 7 are: an external threaded tube 701 fixedly installed at one end of the extension end 5, the user will thread the internal threaded tube 702 fixedly installed on the pressure sensor 6 to the surface of the external threaded tube 701, and the pressure sensor 6 and the extension end 5 can be connected, wherein the main components of the fixing mechanism 8 are: two fixing plates 801 both fixedly installed on the surface of the guide tube 1, and at the same time, medical tape 802 is fixedly installed on the surfaces of the two fixing plates 801, and the user can stick the medical tape 802 on the skin surface of the patient, thereby achieving the fixation of the guide tube 1 on the skin surface of the patient.

[0020] During use, after the user inserts the needle 2 into the patient's blood vessel, the blood inside the blood vessel will flow into the guide tube 1 through the needle 2. At the same time, because one end of the guide tube 1 is in a sealed state under the action of the first connecting mechanism 4, the air pressure inside it will increase. At this time, the pressure sensor 6 will transmit the information of the pressure change to the matching receiving device. After the user obtains the message of the index change of the pressure sensor 6 through the receiving device, he can confirm that the needle 2 has been inserted into the blood vessel, thereby avoiding the situation where there will be no blood return when inserting into a low-pressure blood vessel even if the arteriovenous fistula puncture needle is inserted into the blood vessel, thereby causing the medical staff to accidentally pierce the opposite blood vessel wall, which fully reflects the practicality of the device.

[0021] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Improved disposable arteriovenous fistula puncture needle, characterized in that: include: A guide tube (1), one end of which is provided with a needle (2), and further comprising a connecting mechanism (3), wherein the connecting mechanism (3) is used to connect the needle (2) and the guide tube (1), and further comprising a first connecting mechanism (4), wherein the first connecting mechanism (4) is used to connect the guide tube (1) and the blood inlet end of the dialysis machine and seal one end of the guide tube (1) when not connected to the blood inlet end of the dialysis machine, the surface of the guide tube (1) is provided with an extension end (5), one end of the extension end (5) is provided with a pressure sensor (6), and further comprising a second connecting mechanism (7) and a fixing mechanism (8), wherein the second connecting mechanism (7) is used to connect the pressure sensor (6) and the extension end (5), and the fixing mechanism (8) is used to fix the guide tube (1) on the surface of the patient's skin.

2. The improved disposable arteriovenous fistula puncture needle according to claim 1, characterized in that: The connecting mechanism (3) comprises a connecting tube (301) fixedly mounted on one end of the guide tube (1), a rubber ring (302) fixedly mounted on the inner wall of the connecting tube (301), a cannula (303) slidably inserted into the inner wall of the rubber ring (302), and the other end of the cannula (303) fixedly mounted on one end of the needle (2).

3. The improved disposable arteriovenous fistula puncture needle according to claim 1, characterized in that: The first connecting mechanism (4) comprises a connecting tube (401) sleeved on the surface of the guide tube (1), one end of the connecting tube (401) is rotatably connected with an outlet blood vessel (402), the surface of the outlet blood vessel (402) is threadedly sleeved with a sealing tube (403) and the inner wall is provided with a threaded groove.

4. The improved disposable arteriovenous fistula puncture needle according to claim 1, characterized in that: The second connecting mechanism (7) comprises an externally threaded tube (701) fixedly mounted on one end of the extension end (5); an internally threaded tube (702) is threadedly sleeved on the surface of the externally threaded tube (701); and one end of the pressure sensor (6) is fixedly mounted on one end of the internally threaded tube (702).

5. The improved disposable arteriovenous fistula puncture needle according to claim 1, characterized in that: The fixing mechanism (8) comprises two fixing plates (801) both fixedly mounted on the surface of the guide tube (1), and medical tapes (802) are fixedly mounted on the surfaces of the two fixing plates (801).

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