Internal arteriovenous fistula puncture needle

Abstract

The utility model relates to the technical field of internal arteriovenous fistula, and discloses an internal arteriovenous fistula puncture needle which comprises a fixing mechanism, a protection device and a puncture needle body, the puncture needle body comprises a second fixing pipe sleeve, a hose, a fin clamping block and a needle head, and the fixing mechanism comprises a rubber sheet, a handle, a fixing clamp, a rubber layer and a fixing plate. The protection device comprises a protection shell, a first fixing pipe sleeve is rotationally arranged at the rear end of the protection shell, four limiting grooves are formed in the periphery of the protection shell, a fixing hook is fixedly arranged on the upper side of the end, away from the first fixing pipe sleeve, of the protection shell, and a spring is fixedly arranged in the fixing hook. And a fixed block is fixedly arranged at the lower end of the spring. When the device is used, the fixing plate and the rubber sheet are beneficial for increasing the sticking area of the adhesive tape and preventing the adhesive tape from falling off, and the fixing hook is beneficial for the adhesive tape to hook the fixing hook and pull the fin structure towards the direction of the needle head, so that the needle head is prevented from falling off.

Description

Technical Field

[0001] The utility model relates to the technical field of arteriovenous fistula surgery, in particular to an arteriovenous fistula puncture needle. Background Technique

[0002] Arteriovenous fistula surgery is a commonly used vascular access for maintenance hemodialysis patients, which has the advantages of safety, sufficient blood flow, and few infection opportunities. When a patient undergoes arteriovenous fistula surgery, an arteriovenous fistula puncture needle needs to be inserted into the patient's body, and then arteriovenous fistula surgery is performed. During this process, the arteriovenous fistula puncture needle needs to be fixed with tape to avoid shaking, so as not to cause the anastomotic opening to form an angle and affect blood flow.

[0003] In the prior art, multiple tapes are usually used to fix the arteriovenous fistula puncture needle and the hose. When fixing, a horizontal tape is first used to fix the wing structure, and then a tape is passed through the lower end of the hose, and the wing is pulled towards the needle direction to prevent the needle from falling off. However, this is relatively troublesome, and directly fixing the hose with tape is relatively easy to fall off because the contact surface between the tape and the hose is only a small point at the upper end of the hose.

[0004] Therefore, the present application provides an arteriovenous fistula puncture needle to solve the problems raised in the above background technique. Content of the Utility Model

[0005] The purpose of the utility model is to solve the disadvantages existing in the prior art, and an arteriovenous fistula puncture needle is proposed. When the device is in use, through the fixing hook, it is beneficial to pull the needle body towards the needle direction to prevent the needle from falling off after long-term use. In addition, through the fixing device, it is beneficial to increase the contact area between the tape and the hose, increase stability, and prevent falling off.

[0006] To achieve the above purpose, the utility model provides the following technical solution: an arteriovenous fistula puncture needle, including a fixing mechanism, a protection device, and a needle body. The needle body includes a second fixing sleeve, a hose, a wing clamping block, and a needle head. The fixing mechanism includes a rubber sheet, a handle, a fixing clip, a rubber layer, and a fixing plate;

[0007] The protection device includes a protection shell. A first fixing sleeve is rotatably arranged at the rear end of the protection shell. Four limiting grooves are opened around the protection shell. A fixing hook is fixedly arranged on the upper side of the end of the protection shell far away from the first fixing sleeve. A spring is fixedly arranged inside the fixing hook, and a fixing block is fixedly arranged at the lower end of the spring;

[0008] Furthermore, the second fixing sleeve is fixedly arranged at the rear end of the hose, and two wings are respectively fixedly arranged on both sides of the front end of the hose;

[0009] Further, the handle is fixedly arranged at the upper end of the fixing clip, the rubber layer is fixedly arranged inside the fixing clip, the two fixing plates are respectively rotatably arranged on both sides of the fixing clip, and rubber sheets are respectively fixedly arranged on both sides of the lower end of the fixing clip;

[0010] Further, the protective shell is slidably clamped around the hose, and the widths of the two clamping blocks and the two wing pieces are the same as the widths of the four limiting grooves;

[0011] Further, the needle is fixedly arranged at the top of the front end of the hose, and the two clamping blocks are respectively fixedly arranged on the upper and lower sides of the front end of the hose;

[0012] Further, the length of the protective shell is longer than that of the needle, and one end of the spring is fixedly arranged inside the fixing block;

[0013] The utility model has the following beneficial effects:

[0014] 1. For the arteriovenous fistula puncture needle proposed by the utility model, after the device is inserted into the patient's body, the user installs the fixing clip around the hose, and then pastes the tape on the surface of the fixing device. Through the rubber sheet, it is beneficial to increase the sticking area of the tape, improve the stability, avoid falling off, and through the fixing plate, it is beneficial to fill the gaps generated between both sides of the fixing clip and the tape, and improve the firmness.

[0015] 2. For the arteriovenous fistula puncture needle proposed by the utility model, after the needle is inserted into the patient's body, use the tape to fix the wing piece, and then use another tape to hook the fixing hook and pull the wing piece structure towards the needle direction to prevent the needle from falling off after long-term use. In addition, when the device is removed from the patient, rotate the first fixing tube sleeve to disengage it from the first fixing tube sleeve, and then push the protective shell forward towards the needle. When there is no obstruction at the lower end of the fixing block, it will be pushed out by the spring, so that the fixing block abuts against the needle to avoid retraction. At this time, the protective sleeve completely wraps the needle to avoid harm to medical staff. Description of the Drawings

[0016] Figure 1 is the axonometric schematic diagram of the utility model;

[0017] Figure 2 is the axonometric schematic diagram of the puncture needle of the utility model;

[0018] Figure 3 is the axonometric schematic diagram of the protection device of the utility model;

[0019] Figure 4 is the cross-sectional schematic diagram of the protection device of the utility model;

[0020] Figure 5 is the axonometric schematic diagram of the fixing mechanism of the utility model.

[0021] Legend:

[0022] 1. Fixing mechanism; 2. Protective device; 3. Needle body; 101. Rubber sheet; 102. Handle; 103. Fixing clip; 104. Rubber layer; 105. Fixing plate; 201. No. 1 fixed sleeve; 202. Limiting groove; 203. Protective shell; 204. Fixing hook; 205. Spring; 206. Fixing block; 301. No. 2 fixed sleeve; 302. Hose; 303. Wing; 304. Clamping block; 305. Needle. DETAILED DESCRIPTION

[0023] 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.

[0024] Reference Figure 1 , Figure 3 and Figure 4 The arteriovenous fistula puncture needle provided by the utility model comprises a fixing mechanism 1, a protective device 2 and a puncture needle body 3, wherein the puncture needle body 3 comprises a second-size fixing sleeve 301, a hose 302, a wing 303, a clamping block 304 and a needle 305, and the fixing mechanism 1 comprises a rubber sheet 101, a handle 102, a fixing clip 103, a rubber layer 104 and a fixing plate 105;

[0025] The protective device 2 includes a protective shell 203, a rear end of which is rotatably provided with a No. 1 fixed sleeve 201, four limiting grooves 202 are provided around the protective shell 203, a fixing hook 204 is fixedly provided on the upper side of one end of the protective shell 203 away from the No. 1 fixed sleeve 201, a spring 205 is fixedly provided inside the fixing hook 204, and a fixing block 206 is fixedly provided at the lower end of the spring 205.

[0026] Specifically, the protective shell 203 is helpful to wrap the used needle 305 to avoid harm to medical staff during waste disposal; the limiting groove 202 is helpful to install the wing 303 while using the wing 303 and the clamping block 304 to prevent the protective shell 203 from rotating; the fixing hook 204 is helpful to make the tape hook the fixing hook 204, and pull the wing 303 toward the needle 305 to prevent the needle 305 from falling off after long-term use; the spring 205 is helpful to push out the fixing block 206, and the fixing block 206 is helpful to resist the needle 305, and after the protective shell 203 wraps the needle 305, the protective shell 203 is prevented from returning to its original position.

[0027] Reference Figure 2 , Figure 3 , Figure 4 and Figure 5 The No. 2 fixed sleeve 301 is fixedly set at the rear end of the hose 302, the two wings 303 are respectively fixedly set on both sides of the front end of the hose 302, the handle 102 is fixedly set at the upper end of the fixed clamp 103, the rubber layer 104 is fixedly set inside the fixed clamp 103, the two fixed plates 105 are respectively rotatably set on both sides of the fixed clamp 103, and the rubber sheets 101 are respectively fixedly set on both sides of the lower end of the fixed clamp 103, the protective shell 203 is slidably clamped around the hose 302, the width of the two clamping blocks 304 and the two wings 303 is consistent with the width of the four limiting grooves 202, the needle 305 is fixedly set at the top of the front end of the hose 302, the two clamping blocks 304 are respectively fixedly set on the upper and lower sides of the front end of the hose 302, the length of the protective shell 203 is longer than the needle 305, and one end of the spring 205 is fixedly set inside the fixed block 206.

[0028] Specifically, by fixing the No. 1 fixed sleeve 201 around the No. 2 fixed sleeve 301, it is helpful to fix the protective shell 203 so that it will not move before the device is used and will not affect the operation of medical staff; through the two wing pieces 303, it is helpful for the user to insert the needle 305 into the patient's blood vessel for treatment; the width of the two clamping blocks 304 and the two wing pieces 303 is consistent with the width of the four limiting grooves 202, which is helpful to maintain the stability of the protective shell 203 and avoid shaking; the length of the protective shell 203 is longer than the needle 305, which is helpful to completely wrap the needle 305; by fixing the lower end of the spring 205 inside the fixed block 206, it is helpful to increase the length of the fixed block 206 within a limited space so that the fixed block 206 can resist the needle 305.

[0029] Working principle: When the device is in use, after the needle 305 is inserted into the patient's body, the wing 303 is fixed with tape, and then the tape is used again to hook the fixing hook 204, and the wing 303 is pulled toward the needle 305 to prevent the needle 305 from falling off after long-term use, and then the fixing clip 103 is fixed around the hose 302 at the rear end, and then the tape is pasted on the upper end of the fixing plate 105 and the rubber sheet 101, and pasted together with the patient's skin, which is conducive to increasing the adhesive surface of the tape and preventing it from falling off. When the use is completed, the needle 305 is taken out, and the No. 1 fixed closing sleeve is turned to allow the protective shell 203 to move, and then the protective shell 203 is pushed toward the needle 305 until there is no obstruction at the lower end of the fixing block 206. The fixing block 206 will pop out under the push of the spring 205, and the needle 305 is pressed to prevent the protective shell 203 from returning to its original position, and the needle 305 is wrapped to avoid injury to the staff during handling.

[0030] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Arteriovenous fistula puncture needle, comprising a fixing mechanism (1), a protection device (2) and a puncture needle body (3), characterized in that: The lancet body (3) includes a second fixed sleeve (301), a flexible tube (302), fins (303), a clamping block (304), and a needle tip (305). The fixing mechanism (1) includes a rubber sheet (101), a handle (102), a fixing clip (103), a rubber layer (104), and a fixing plate (105). The protection device (2) includes a protective shell (203). A first fixed sleeve (201) is rotatably provided at the rear end of the protective shell (203). Four limiting grooves (202) are formed around the protective shell (203). A fixing hook (204) is fixedly provided on the upper side of the end of the protective shell (203) away from the first fixed sleeve (201). A spring (205) is fixedly provided inside the fixing hook (204). A fixing block (206) is fixedly provided at the lower end of the spring (205).

2. The arteriovenous fistula puncture needle according to claim 1, wherein: The second fixed sleeve (301) is fixedly provided at the rear end of the flexible tube (302). Two fins (303) are respectively fixedly provided on both sides of the front end of the flexible tube (302).

3. The arteriovenous fistula puncture needle according to claim 1, characterized in that: The handle (102) is fixedly provided at the upper end of the fixing clip (103). The rubber layer (104) is fixedly provided inside the fixing clip (103). Two fixing plates (105) are respectively rotatably provided on both sides of the fixing clip (103). Rubber sheets (101) are respectively fixedly provided on both sides of the lower end of the fixing clip (103).

4. The arteriovenous fistula puncture needle according to claim 1, wherein: The protective shell (203) is slidably clamped around the flexible tube (302). The widths of the two clamping blocks (304) and the two fins (303) are the same as the widths of the four limiting grooves (202).

5. The arteriovenous fistula puncture needle according to claim 1, wherein: The needle tip (305) is fixedly provided at the top of the front end of the flexible tube (302). Two clamping blocks (304) are respectively fixedly provided on the upper and lower sides of the front end of the flexible tube (302).

6. The arteriovenous fistula puncture needle according to claim 1, characterized in that: The length of the protective shell (203) is longer than that of the needle tip (305). One end of the spring (205) is fixedly provided inside the fixing block (206).

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