Integrated internal fistula puncture needle protection device

Abstract

The integrated internal fistula puncture needle protection device comprises a protection sleeve arranged outside a needle rod and a needle base in a sleeving mode, the two sides of the protection sleeve are each provided with a needle wing, and the protection sleeve can slide front and back in the axial direction of the needle rod; a protection elastic piece is arranged at the front end of the protection sleeve and comprises a rotating part and a shielding part, one end of the rotating part is installed on the protection sleeve, the other end of the rotating part is connected with the shielding part, and an included angle is formed between the shielding part and the rotating part; the rotating part can swing on the protective sleeve to be close to or away from the needle rod, and the rotating part has pre-tightening force close to the needle rod; the protection elastic piece comprises a first state in which the rotating part is far away from the needle rod and one end of the shielding part far away from the rotating part abuts against the side wall of the needle rod; in the second state, the rotating part is close to the needle rod, and the shielding part is in front of the needle rod. After the needle is pulled out after dialysis is finished, the protection device is pushed to the needle point, the protection sleeve is fixed through the second protrusion, meanwhile, the protection elastic piece covers the needle point, and the purpose of protecting the needle point is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of hemodialysis-related medical devices, and in particular to an integrated fistula puncture needle protection device. Background Art

[0002] Hemodialysis is the main treatment for chronic renal failure. Its principle is to establish extracorporeal circulation through vascular access, purify the blood outside the body and then return it to the body, thereby replacing kidney function and prolonging the patient's life. Vascular access is the lifeline of hemodialysis patients, and the arteriovenous fistula established after arteriovenous anastomosis is the most commonly used vascular access. Before each hemodialysis treatment, two puncture needles are usually used to pierce the fistula blood vessels, one of which is used as the blood inlet end to lead the blood out of the body for dialysis, and the other is used as the blood return end to return the blood to the body.

[0003] The fistula puncture needle is mainly a 16g or 17g steel needle. After the dialysis treatment is completed, the medical staff will pull the puncture needle out of the fistula blood vessel. At this time, the puncture needle is exposed to the environment as a sharp bloody instrument, which is not only easy to cause needlestick injuries to medical staff and waste disposal and transportation personnel, increasing the risk of occupational exposure, but also may cause environmental pollution and cross-infection. Therefore, a needle tip protection device is needed that can cover the needle tip as soon as the puncture needle is pulled out to prevent needlestick injuries, eliminate the risk of blood transmission, and block occupational exposure of medical staff. Utility Model Content

[0004] To this end, the present application provides an integrated internal fistula puncture needle protection device to solve the problem of blood transmission caused by injuring medical staff after the puncture needle is pulled out in the prior art.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] An integrated fistula puncture needle protection device comprises a protective sleeve sleeved on the outside of a needle shaft and a needle seat, a needle wing is installed on both sides of the protective sleeve, and the protective sleeve can slide forward and backward along the axial direction of the needle shaft;

[0007] The front end of the protective sleeve is provided with a protective spring sheet, and the protective spring sheet includes a rotating part and a shielding part. One end of the rotating part is mounted on the protective sleeve, and the other end is connected to the shielding part. There is an angle between the shielding part and the rotating part; the rotating part can swing on the protective sleeve to approach the needle bar or away from the needle bar, and the rotating part has a pre-tightening force close to the needle bar; the protective spring sheet includes

[0008] A first state in which the rotating portion is away from the needle rod and one end of the shielding portion away from the rotating portion abuts against the side wall of the needle rod;

[0009] The rotating part is close to the needle bar, and the shielding part is in a second state directly in front of the needle bar.

[0010] Optionally, two protective springs are provided, and the two protective springs are respectively arranged on both sides of the needle rod and arranged opposite to each other. When the protective spring is in the second state, one of the shielding parts contacts the needle tip, and the other shielding part covers the front side of the first shielding part.

[0011] Optionally, a circle of grooves is provided on the side wall of the needle seat; a first protrusion and a second protrusion are provided on the inner wall of the protective sleeve, the first protrusion is located in front of the second protrusion, and both the first protrusion and the second protrusion can be inserted into the groove; when the first protrusion cooperates with the groove, the needle rod is outside the protective sleeve, and the protective spring sheet is in a first state; when the second protrusion cooperates with the groove, the needle rod is inside the protective sleeve, and the protective spring sheet is in a second state.

[0012] Further optionally, the needle wing includes a movable plate and a fixed plate, the fixed plate is fixed on the outer wall of the protective sleeve, the movable plate is installed on the fixed plate and can slide radially along the protective sleeve; the first protrusion is fixed on the movable plate.

[0013] Further optionally, a sliding groove is provided on a side of the fixed plate facing the movable plate, and a sliding block is provided on a side of the movable plate facing the fixed plate, and the sliding block cooperates with the sliding groove and can slide in the sliding groove.

[0014] Further optionally, the cross section of the slider is T-shaped, and the slide groove is adapted to the slider.

[0015] Optionally, the second protrusion is elastic.

[0016] Optionally, the surface of the movable plate is provided with anti-slip grooves.

[0017] Optionally, a retaining ring is fixed to the front end of the protective sleeve, and the protective spring sheet is located inside the retaining ring.

[0018] Compared with the prior art, this application has at least the following beneficial effects:

[0019] 1. The protective device is integrated with the puncture needle. During puncture, the protective cover is placed on the outer periphery of the needle seat, which is no different from an ordinary puncture needle and can be used for puncture normally. After the dialysis is completed and the needle is removed, the protective cover is moved and pushed toward the needle tip, so that the protective spring is in the second state, so that the needle tip is covered by the shielding part, thereby achieving the purpose of needle tip protection.

[0020] 2. The groove cooperates with the first protrusion and the second protrusion respectively, so that the protective cover is stabilized in the puncture state where the puncture needle can puncture normally, and in the protection state where the protective spring sheet can shield the needle tip.

[0021] 3. The arrangement of the movable plate facilitates the first protrusion to be pulled out from the groove.

[0022] 4. Anti-slip patterns can increase the friction between your hands and the moving plate to prevent slipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more intuitively illustrate the prior art and the present application, exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing the present application; for example, those skilled in the art are capable of easily making conventional adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components) based on the technical concepts and exemplary drawings disclosed in the present application.

[0024] Figure 1 A schematic diagram of the structure of an integrated internal fistula puncture needle protection device in a first state provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of the structure of an integrated internal fistula puncture needle protection device in a second state provided in an embodiment of the present application;

[0026] Figure 3 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0027] Figure 4 for Figure 2 A magnified schematic diagram of point B in the middle.

[0028] Description of reference numerals:

[0029] 1. Needle rod; 2. Needle seat; 3. Protective cover; 4. Protective spring; 41. Rotating part; 42. Shielding part; 5. Retaining ring; 6. Groove; 7. First protrusion; 8. Second protrusion; 9. Needle wing; 91. Moving plate; 92. Fixed plate; 10. Slide groove; 11. Sliding block. DETAILED DESCRIPTION

[0030] The present application is further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0031] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to, and do not have special meanings in terms of technical connotations (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0032] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually used to indicate the general relative position relationship for the purpose of intuitive understanding by referring to the drawings, and are not absolute limitations on the position relationship in the actual product.

[0033] An integrated fistula puncture needle protection device, referring to Figure 1 and Figure 2 , including a protective sleeve 3 sleeved on the needle rod 1 and the needle seat 2, the protective sleeve 3 is a hollow cylinder. The length of the protective sleeve 3 is greater than the length of the needle rod 1, and can slide forward and backward along the axial direction of the needle rod 1. A certain gap is left between the protective sleeve 3 and the needle seat 2 and the needle rod 1, so that the protective sleeve 3 can rotate relative to the puncture needle.

[0034] Reference Figure 3 The front end of the protective sleeve 3 is provided with two protective springs 4, each protective spring 4 comprises a rotating portion 41 and a shielding portion 42. The two protective springs 4 are arranged on opposite sides of the needle rod 1 and are arranged opposite to each other.

[0035] The rotating part 41 is a rod-shaped structure, and the shielding part 42 is a rectangular sheet. One end of the rotating part 41 is mounted on the side wall of the front end of the protective cover 3, and the other end is connected to the shielding part 42, and there is an angle between the shielding part 42 and the rotating part 41. The rotating part 41 can swing left and right on the protective cover 3 to approach the needle bar 1 or move away from the needle bar 1, and the rotating part 41 has a pre-tightening force close to the needle bar 1.

[0036] Reference Figure 1 and Figure 2 The protective spring sheet 4 includes: a first state in which the rotating portion 41 is away from the needle rod 1, and one end of the shielding portion 42 away from the rotating portion 41 abuts against the side wall of the needle rod 1 (at this time, the rotating portion 41 is in a deformed state and has a tendency to swing toward the side of the needle rod 1); and a second state in which the rotating portion 41 is close to the needle rod 1 and the shielding portion 42 is directly in front of the needle rod 1 (at this time, the rotating portion 41 is in a natural state without deformation).

[0037] When both protective springs 4 are in the second state, the inner side of one shielding portion 42 contacts the needle tip, and the other shielding portion 42 covers the front side of the first shielding portion 42. At this time, the needle rod 1 is completely in the inner cavity of the protective sleeve 3.

[0038] In order to prevent the protective spring sheet 4 from being damaged and to prevent the protective spring sheet 4 from scratching people, a retaining ring 5 is coaxially fixed to the front end of the protective sleeve 3 , and the protective spring sheet 4 is completely located in the retaining ring 5 .

[0039] A circle of grooves 6 are provided on the side wall of the needle seat 2, and the cross section of the grooves 6 is rectangular. A first protrusion 7 and a second protrusion 8 are provided on the inner wall of the protective sleeve 3, and the first protrusion 7 is located in front of the second protrusion 8 in the axial direction, and the shapes of the first protrusion 7 and the second protrusion 8 are both adapted to the groove 6 and can be inserted into the groove 6. When the first protrusion 7 is matched with the groove 6, the protective sleeve 3 is in a rearward position, and the needle rod 1 is outside the sleeve range of the protective sleeve 3, and the protective spring 4 is in the first state; when the second protrusion 8 is matched with the groove 6, the protective sleeve 3 is in a forward position, and the needle rod 1 is completely within the sleeve range of the protective sleeve 3, and the rear end of the protective sleeve 3 is still sleeved outside the front end of the needle seat 2, and the protective spring 4 is in the second state.

[0040] In order to stabilize the protective sleeve 3 so that the protective spring 4 can be stably in the first state or the second state, a needle wing 9 is installed on the outer walls on both sides of the protective sleeve 3, and two first protrusions 7 are also correspondingly arranged, and each first protrusion 7 corresponds to a needle wing 9.

[0041] The needle wing 9 comprises a movable plate 91 and a fixed plate 92. The fixed plate 92 is fixed to the outer wall of the protective sleeve 3, the movable plate 91 is mounted on the fixed plate 92 and can slide on the fixed plate 92 along the radial direction of the protective sleeve 3, and the first protrusion 7 is fixed to the corresponding movable plate 91.

[0042] Reference Figure 1 and Figure 4 Specifically, a slide groove 10 is provided on the side of the fixed plate 92 facing the movable plate 91, and a slider 11 is provided on the side of the movable plate 91 facing the fixed plate 92. The slider 11 cooperates with the slide groove 10 and can slide in the slide groove 10. In other embodiments, the slide groove 10 can also be provided on the movable plate 91, and the slider 11 can be provided on the fixed plate 92, as long as the cooperation between the slider 11 and the slide groove 10 can be utilized to ensure that the movable plate 91 can slide relative to the fixed plate 92.

[0043] In order to ensure the sliding reliability of the moving plate 91 , the sliding block 11 is configured as a block structure with a T-shaped cross section, and the shape of the sliding groove 10 is adapted to the sliding block 11 .

[0044] For ease of operation, the second protrusion 8 is made of elastic material, so that when the protective cover 3 moves forward and the second protrusion 8 is aligned with the groove 6, there is no need to manually operate the second protrusion 8 for insertion. The second protrusion 8 can be smoothly inserted into the groove 6 to complete the fit under the action of its own elasticity.

[0045] Therefore, when the puncture needle performs puncture, the first protrusion 7 cooperates with the groove 6, the slider 11 is at the inner end of the slide groove 10, the movable plate 91 is aligned with the fixed plate 92 in the axial direction, and the needle rod 1 is outside the sleeve range of the protective sleeve 3. At this time, the needle wing 9 is held to perform puncture. Since the moving direction of the movable plate 91 is perpendicular to the puncture direction, the movable plate 91 will not be displaced during the puncture process. After the puncture is completed, the movable plate 91 is pulled outward to drive the first protrusion 7 away from the groove 6; the protective sleeve 3 is pushed forward until the second protrusion 8 is stuck in the groove 6 and fixes the axial movement of the protective sleeve 3. At this time, the protective spring 4 just moves to the front of the needle tip, and the rotating part 41 swings to drive the shielding part 42 to the front side of the needle tip, thereby shielding the needle tip.

[0046] In order to prevent the hand from slipping during the puncture process, anti-skid patterns are provided on the surface of the movable plate 91 . Meanwhile, the provision of the anti-skid patterns also makes it easier to drive the movable plate 91 to move relative to the fixed plate 92 .

[0047] The implementation principle of the embodiment of the present application is as follows: in the initial state, the protective cover 3 is in a rearward position, the front part of the needle rod 1 is outside the sleeve range of the protective cover 3, the first protrusion 7 is inserted into the groove 6 to fix the protective cover 3, and the movable plate 91 and the fixed plate 92 are aligned in the axial direction. At this time, the protective cover 3 can be rotated to adjust the angle of the protective cover 3 relative to the puncture needle.

[0048] In the initial state, medical staff can hold the needle wing 9 to complete the puncture work.

[0049] After the needle is pulled out, first pull the movable plate 91 outward, so as to bring the first protrusion 7 out of the groove 6 and release the fixed state of the protective cover 3. Then push the protective cover 3 forward until the protective cover 3 is completely sleeved on the outside of the needle rod 1. When the second protrusion 8 is aligned with the groove 6, it is automatically inserted into the groove 6 under the action of elasticity and fixes the protective cover 3 in this position. At the same time, the shielding parts 42 of the two protective springs 4 move along the needle rod 1 to the front side of the needle tip, the rotating part 41 rebounds, and drives the two shielding parts 42 to shield and protect the needle tip. At this time, the shielding part 42 blocks the front side of the needle tip, and the retaining ring 5 is on the surrounding side of the needle tip. The two together separate the needle tip from the outside world to prevent medical staff from being pricked by the needle tip.

[0050] After completing needle tip protection, throw the puncture needle into medical waste for recycling.

[0051] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. An integrated fistula puncture needle protection device, characterized in that: It comprises a protective sleeve (3) which is sleeved on the outside of the needle rod (1) and the needle seat (2), a needle wing (9) being installed on both sides of the protective sleeve (3), and the protective sleeve (3) can slide forward and backward along the axial direction of the needle rod (1); A protective spring sheet (4) is provided at the front end of the protective sleeve (3), and the protective spring sheet (4) comprises a rotating portion (41) and a shielding portion (42), one end of the rotating portion (41) is mounted on the protective sleeve (3), and the other end is connected to the shielding portion (42), and an angle is formed between the shielding portion (42) and the rotating portion (41); the rotating portion (41) can swing on the protective sleeve (3) to approach the needle bar (1) or move away from the needle bar (1), and the rotating portion (41) has a pre-tightening force to approach the needle bar (1); the protective spring sheet (4) comprises The rotating portion (41) is away from the needle rod (1), and one end of the shielding portion (42) away from the rotating portion (41) abuts against a side wall of the needle rod (1); The rotating portion (41) is close to the needle bar (1), and the shielding portion (42) is in a second state directly in front of the needle bar (1).

2. The integrated internal fistula puncture needle protection device according to claim 1, characterized in that: Two protective spring sheets (4) are provided, and the two protective spring sheets (4) are arranged on both sides of the needle rod (1) and are arranged opposite to each other. When the protective spring sheet (4) is in the second state, one of the shielding parts (42) contacts the needle tip, and the other shielding part (42) covers the front side of the first shielding part (42).

3. The integrated internal fistula puncture needle protection device according to claim 1, characterized in that: A circle of grooves (6) is provided on the side wall of the needle seat (2); a first protrusion (7) and a second protrusion (8) are provided on the inner wall of the protective sleeve (3); the first protrusion (7) is located in front of the second protrusion (8), and both the first protrusion (7) and the second protrusion (8) can be inserted into the groove (6); when the first protrusion (7) cooperates with the groove (6), the needle rod (1) is outside the protective sleeve (3), and the protective spring sheet (4) is in a first state; when the second protrusion (8) cooperates with the groove (6), the needle rod (1) is inside the protective sleeve (3), and the protective spring sheet (4) is in a second state.

4. The integrated internal fistula puncture needle protection device according to claim 3, characterized in that: The needle wing (9) comprises a movable plate (91) and a fixed plate (92), wherein the fixed plate (92) is fixed on the outer wall of the protective sleeve (3), and the movable plate (91) is mounted on the fixed plate (92) and can slide on the fixed plate (92) along the radial direction of the protective sleeve (3); the first protrusion (7) is fixed on the movable plate (91).

5. The integrated internal fistula puncture needle protection device according to claim 4, characterized in that: A sliding groove (10) is provided on one side of the fixed plate (92) facing the movable plate (91), and a sliding block (11) is provided on one side of the movable plate (91) facing the fixed plate (92). The sliding block (11) cooperates with the sliding groove (10) and can slide in the sliding groove (10).

6. The integrated internal fistula puncture needle protection device according to claim 5, characterized in that: The cross section of the sliding block (11) is T-shaped, and the sliding groove (10) is adapted to the sliding block (11).

7. The integrated internal fistula puncture needle protection device according to claim 3, characterized in that: The second protrusion (8) is elastic.

8. The integrated internal fistula puncture needle protection device according to claim 4, characterized in that: The surface of the movable plate (91) is provided with anti-slip grooves.

9. The integrated internal fistula puncture needle protection device according to claim 1, characterized in that: A retaining ring (5) is fixed to the front end of the protective sleeve (3), and the protective spring sheet (4) is located inside the retaining ring (5).

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