Hemodialysis puncture needle fixator

Abstract

The invention discloses a hemodialysis puncture needle fixator, and relates to the technical field of medical instruments. The hemodialysis puncture needle fixator comprises a connecting rod, a puncture needle placing plate, a base, a sliding block and a fastening screw, the base is used for being placed in front of a puncture position of a patient, and sliding grooves perpendicular to the edges of the front side, the rear side and the right side of the upper surface of the base are formed in the front side, the rear side and the right side of the upper surface of the base; the puncture needle placing plate is arranged on the upper surface of the base, is positioned among the three chutes, and is parallel to the front side edge and the rear side edge of the upper surface of the base; the number of the connecting rods and the number of the sliding blocks are both three, connecting lugs are arranged on the upper surfaces of the sliding blocks in an upward protruding mode, and the three sliding blocks are arranged in three sliding grooves in the base in a sliding mode. The middle areas of the front side wall and the rear side wall of the puncture needle containing plate are perpendicularly and rotationally connected with rotating shafts, and connecting lugs are arranged at the ends, opposite to the ends connected to the puncture needle containing plate, of the rotating shafts. According to the hemodialysis puncture needle fixator, the fixing angle of the puncture needle can be changed at will, and high efficiency of dialysis treatment is effectively guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a hemodialysis puncture needle fixer. Background Art

[0002] In hemodialysis treatment, stable vascular access is the core element to ensure adequate solute removal and hemodynamic safety. As the key interface of extracorporeal circulation, the position stability of the puncture needle directly affects blood flow and dialysis efficiency. However, clinical practice has shown that during treatment, changes in patient position, vascular spasm, or loose catheter fixation often cause the needle to shift or adhere to the wall, causing hemodynamic disorders.

[0003] When the arterial puncture needle sticks to the wall or partially falls out of the blood vessel cavity, the resistance to blood outflow increases, which is particularly obvious when the needle is facing upward. At this time, the contact area between the needle tip bevel and the blood vessel wall increases, and the cross-sectional area of ​​the blood flow channel decreases, forming local turbulence and resistance peaks, which directly reduces the blood pump suction efficiency. This kind of wall-sticking phenomenon can cause frequent alarms on the dialysis machine (such as low arterial pressure), and the needle angle needs to be adjusted frequently to maintain normal blood flow rate. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a hemodialysis puncture needle holder, which can arbitrarily change the fixing angle of the puncture needle and effectively ensure the high efficiency of dialysis treatment.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A hemodialysis puncture needle holder comprises a connecting rod, a puncture needle placement plate, a base, a slider and a fastening screw, wherein the base is used to be placed in front of the patient's puncture site, and the front and rear sides and the right side of the upper surface of the base are provided with slide grooves perpendicular to their edges; the puncture needle placement plate is arranged on the upper surface of the base and is located between the three slide grooves, and is arranged parallel to the front and rear edges of the upper surface of the base; the connecting rod and the slider are each provided with three, and the upper surface of the slider is provided with connecting ears protruding upward, and the three sliders can be slidably arranged in the three slide grooves on the base; the front and rear sides of the puncture needle placement plate The middle area of ​​the wall is vertically and rotatably connected with a rotating shaft, and a connecting ear is provided at the opposite end of the rotating shaft and the connected puncture needle placement plate, wherein one end of the two connecting rods are rotatably connected to the connecting ears on the rotating shaft on both sides of the puncture needle placement plate, and the other ends of the two connecting rods are rotatably connected to the connecting ears of the slider on the front and rear sides of the puncture needle placement plate, respectively; one end of the third connecting rod is rotatably connected to the side wall of the right end portion of the puncture needle placement plate, and the other end is rotatably connected to the connecting ear of the slider located on the right side of the base; the fastening screw is provided on the slider, and is used to fix the slider on the base after the slider is adjusted to a suitable position.

[0007] In some embodiments, the puncture needle placement plate is in the shape of a rectangular parallelepiped, and the upper surface of the puncture needle placement plate is provided with an arc-shaped groove matching the puncture needle along its length direction connecting the left and right sides, and the upper surface of the puncture needle placement plate is located in the right area downward and has a slot for accommodating the butterfly wing handle of the puncture needle.

[0008] In at least one embodiment, the upper surface of the puncture needle placement plate is located on both sides of the groove and has a guide groove with a T-shaped cross-section downwardly opened along its length direction, and the right side of the guide groove is connected to the outer card groove, and a limit rod for limiting the removal of the puncture needle butterfly wing handle is slidably arranged in the guide groove, and the left end of the limit rod is fixedly provided with a protrusion extending from the upper surface of the guide groove.

[0009] In at least one embodiment, the limiting rod is made of iron material, and a receiving hole is provided on the opposite side where the clamping slot is connected to the guide slot, and a magnet is provided in the receiving hole.

[0010] In at least one embodiment, a concave blind hole is opened in the middle area of ​​the front and rear side walls of the puncture needle placement plate, and two rotating shafts on the front and rear sides of the puncture needle placement plate can be rotatably embedded in the concave blind hole.

[0011] In at least one embodiment, the transverse cross-sections of the slider and the slide groove are both T-shaped, and the slider can be slidably set in the slide groove along the length direction of the slide groove. A threaded through hole is set on the upper surface of the slider connected to the bottom, and the fastening screw is threadedly connected in the threaded through hole. When the fastening screw is tightened, its bottom abuts against the bottom surface of the slide groove under the reaction force and fixes the slider on the slide groove.

[0012] In at least one embodiment, restraint belts are provided on the front and rear sides of the base.

[0013] In some embodiments, the hemodialysis puncture needle holder also includes a flow sensor, a single-chip microcomputer, a speaker and a battery. An installation cavity is opened inside the base, and the single-chip microcomputer, the speaker and the battery are all arranged in the installation cavity; the battery is connected to the single-chip microcomputer for providing a working voltage; the flow sensor is arranged at the end of the puncture needle placement plate and is located on the side wall of the puncture needle catheter. The output end of the flow sensor is connected to the single-chip microcomputer for monitoring the blood flow velocity in the catheter and sending the measurement data to the single-chip microcomputer; the speaker is connected to the single-chip microcomputer, and the single-chip microcomputer stores a preset value for detecting the blood flow velocity, which is used to trigger the speaker alarm after receiving blood flow velocity data less than the preset value.

[0014] Compared with the prior art, the present invention achieves at least the following beneficial effects: the present invention uses the linkage structure of the base, the slide, the slider and the connecting rod to enable the puncture needle placement plate to achieve multi-dimensional angle adjustment. Medical staff can adjust the fixed angle of the puncture needle in real time according to the patient's vascular status to prevent the needle from sticking to the wall or falling out of the blood vessel cavity, thereby reducing the increase in blood flow resistance and the decrease in blood pump efficiency caused by improper angles. At the same time, the slider cooperates with the slide and combines the locking mechanism of the fastening screw to quickly fix the position of the puncture needle after adjustment, effectively reducing the risk of needle displacement caused by vascular spasm during treatment, reducing the frequency of dialysis machine alarms such as low arterial pressure, etc., and ensuring blood flow stability and treatment continuity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] One or more embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0016] Figure 1 This is a schematic structural diagram of a hemodialysis puncture needle holder according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the hemodialysis puncture needle holder according to an embodiment of the present invention after the puncture needle is hidden when in use;

[0018] Figure 3 This is a schematic diagram of the structure of the hemodialysis puncture needle holder after the installation cavity is unfolded according to an embodiment of the present invention.

[0019] The numbers in the figure are: 1. connecting rod; 2. puncture needle placement plate; 21. groove; 22. card slot; 23. guide groove; 24. limit rod; 241. bump; 25. receiving hole; 251. magnet; 26. concave blind hole; 3. base; 31. slide groove; 32. installation cavity; 4. slider; 41. threaded through hole; 5. fastening screw; 6. rotating shaft; 7. restraint belt; 8. flow sensor; 9. single-chip microcomputer; 10. speaker; 11. battery. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below with reference to the exemplary embodiments in the accompanying drawings. However, it should be understood that the present invention can be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. These embodiments are provided herein to make the disclosure of the present invention more complete and to fully convey the concept of the present invention to those skilled in the art.

[0021] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0022] like Figures 1 to 3 As shown, in at least one embodiment of the hemodialysis puncture needle holder of the present invention, the connecting rod 1, the puncture needle placement plate 2, the base 3, the slider 4 and the fastening screw 5, the base 3 is used to be placed in front of the patient's puncture site, and the front and rear sides and the right side of the upper surface of the base 3 are provided with slide grooves 31 perpendicular to the edges. The puncture needle placement plate 2 is arranged on the upper surface of the base 3 and is located between the three slide grooves 31, and is arranged parallel to the front and rear edges of the upper surface of the base 3. There are three connecting rods 1 and three sliders 4, and the upper surface of the slider 4 is protruding upward with a connecting ear, and the three sliders 4 can be slidably arranged in the three slide grooves 31 on the base 3. A concave blind hole 26 is opened in the middle area of ​​the front and rear side walls of the puncture needle placement plate 2, and a rotating shaft 6 is vertically and rotatably connected in the concave blind hole 26. The rotating shaft 6 is provided with a connecting ear at the opposite end connected to the puncture needle placement plate 2, wherein one end of the two connecting rods 1 is rotatably connected to the connecting ears on the rotating shaft 6 on both sides of the puncture needle placement plate 2, and the other ends of the two connecting rods 1 are rotatably connected to the connecting ears of the slider 4 on the front and rear sides of the puncture needle placement plate 2, respectively; one end of the third connecting rod is rotatably connected to the side wall of the right end of the puncture needle placement plate 2, and the other end is rotatably connected to the connecting ear of the slider 4 located on the right side of the base 3. The fastening screw 5 is arranged on the slider 4, and is used to fix the slider 4 on the base 3 after the slider 4 is adjusted to a suitable position. Specifically, the slider 4 and the transverse cross-section of the slide groove 31 are both T-shaped, and the slider 4 can be slid in the slide groove 31 along the length direction of the slide groove 31. A threaded through hole 41 is arranged on the upper surface of the slider 4 and connected to the bottom. The fastening screw 5 is threadedly connected in the threaded through hole 41. When the fastening screw 5 is tightened, its bottom abuts against the bottom surface of the slide groove 31 under the reaction force and fixes the slider 4 on the slide groove 31.

[0023] Among them, in this embodiment, the lower surface of the base 3 is set in an arc shape, which is used to fit on the patient's wrist. In order to increase the patient's comfort, a layer of skin-friendly silicone is attached to the arc surface to further increase the friction between the base 3 and the patient's wrist, thereby achieving an anti-slip effect.

[0024] The puncture needle placement plate 2 is in the shape of a rectangular parallelepiped, and the upper surface of the puncture needle placement plate 2 is provided with an arc-shaped groove 21 matching the puncture needle along its length direction, and the upper surface of the puncture needle placement plate 2 is provided with a slot 22 for accommodating the butterfly wing handle of the puncture needle downwardly in the right area. The upper surface of the puncture needle placement plate 2 is provided with a guide groove 23 with a T-shaped cross section downwardly along its length direction on both sides of the groove 21, and the right side of the guide groove 23 is connected to the outer slot 22, and a limit rod 24 for limiting the removal of the butterfly wing handle of the puncture needle can be slidably arranged in the guide groove 23, and the left end of the limit rod 24 is fixed with a protrusion 241 extending from the upper surface of the guide groove 23 upward. By such arrangement, after the puncture needle butterfly wing handle is inserted into the slot 22 on the puncture needle placement plate 2, the limiting rod 24 can be pushed out of the guide groove 23 through the protrusion 241 and positioned above the puncture needle butterfly wing handle, thereby achieving the effect of pressing and preventing the puncture needle butterfly wing handle from falling out.

[0025] In order to prevent the limit rod 24 from loosening between the through hole connecting the guide groove 23 and the card slot 22 after long-term use, thereby preventing the butterfly handle of the puncture needle from falling out, the limit rod 24 is made of iron material, and a receiving hole 25 is opened on the opposite side where the card slot 22 is connected to the guide groove 23, and a magnet 251 is arranged in the receiving hole 25. Through this arrangement, the limit rod 24 can be pushed onto the magnet 251 in the receiving hole 25, thereby preventing the butterfly handle of the puncture needle from falling out.

[0026] Meanwhile, restraint belts 7 are arranged on the front and rear sides of the base 3. In this embodiment, the restraint belt 7 is connected by Velcro. The restraint belt 7 is divided into two sections, one section is Velcro fur surface, one end of which is connected to the lower part of the front side wall of the base 3. The other section is Velcro hook surface, one end of which is connected to the lower part of the rear side wall of the base 3. By such arrangement, the fixator can be applied to the wrists of different patients, thereby increasing its scope of use.

[0027] In addition, the hemodialysis puncture needle holder also includes a flow sensor 8, a single-chip microcomputer 9, a speaker 10 and a battery 11. An installation cavity 32 is provided inside the base 3, and the single-chip microcomputer 9, the speaker 10 and the battery 11 are all arranged in the installation cavity 32. The battery 11 is connected to the single-chip microcomputer 9 to provide a working voltage. The flow sensor 8 is arranged at the end of the puncture needle placement plate 2 and is located on the side wall of the puncture needle catheter. The output end of the flow sensor 8 is connected to the single-chip microcomputer 9 to monitor the blood flow velocity in the catheter and send the measurement data to the single-chip microcomputer 9. The speaker 10 is connected to the single-chip microcomputer 9, and the single-chip microcomputer 9 stores a preset value for detecting the blood flow velocity, which is used to trigger the speaker 10 to alarm after receiving blood flow velocity data less than the preset value. Through such a setting, the wall response efficiency is significantly improved without changing the existing catheter structure and clinical process. It is particularly suitable for small and medium-sized medical institutions with limited resources, and has both high cost performance and easy promotion.

[0028] The flow sensor 8 is an ultrasonic Doppler flow sensor 8, which is arranged outside the catheter and does not need to contact blood, thereby avoiding biocompatibility and reducing the cost of catheter modification.

[0029] The method of using the hemodialysis puncture needle holder is as follows: first, fit the base 3 to the proximal end of the puncture point of the patient's limb, fix the base 3 with Velcro, and embed and fix the puncture needle in the slot 22 of the placement plate through the limit rod 24; then, according to the change of blood flow, synchronously slide the front, rear and right sliders 4 of the base 3, and adjust the pitch angle and horizontal deflection angle of the puncture needle through the connecting rod 1, observe the blood flow of the dialysis machine to be stable, and tighten the fastening screw 5 on the slider 4 to lock the angle; during treatment, if the flow sensor 8 detects abnormal blood flow, the screw can be quickly loosened to fine-tune the position of the slider 4 and re-lock it; after treatment, reset the slider 4 and take out the puncture needle, and wipe and disinfect the parts with alcohol.

[0030] It should be understood that all the above embodiments are illustrative rather than restrictive, and various modifications or variations made by those skilled in the art to the specific embodiments described above under the conception of the present invention should be within the protection scope of the present invention.

Claims

1. A hemodialysis puncture needle holder, characterized in that: The invention comprises a connecting rod (1), a puncture needle placement plate (2), a base (3), a slider (4) and a fastening screw (5), wherein the base (3) is used to be placed in front of the puncture site of the patient, and the front and rear sides and the right side of the upper surface of the base (3) are provided with slide grooves (31) perpendicular to the edges thereof; the puncture needle placement plate (2) is arranged on the upper surface of the base (3) and is located between the three slide grooves (31), and is arranged parallel to the front and rear sides of the upper surface of the base (3); the connecting rod (1) and the slider (4) are each provided with three, and the upper surface of the slider (4) is provided with connecting ears protruding upward, and the three sliders (4) can be slidably arranged in the three slide grooves (31) on the base (3); the front and rear side walls of the puncture needle placement plate (2) are provided with connecting ears protruding upward, and the three sliders (4) can be slidably arranged in the three slide grooves (31) on the base (3); The middle area is vertically and rotatably connected to a rotating shaft (6), and a connecting ear is provided at the opposite end of the rotating shaft (6) and the puncture needle placement plate (2), wherein one end of the two connecting rods (1) is rotatably connected to the connecting ears on the rotating shaft (6) on both sides of the puncture needle placement plate (2), and the other ends of the two connecting rods (1) are rotatably connected to the connecting ears of the slider (4) on the front and rear sides of the puncture needle placement plate (2), respectively; one end of the third connecting rod is rotatably connected to the side wall of the right end of the puncture needle placement plate (2), and the other end is rotatably connected to the connecting ear of the slider (4) located on the right side of the base (3); the fastening screw (5) is provided on the slider (4) and is used to fix the slider (4) on the base (3) after the slider (4) is adjusted to a suitable position.

2. The hemodialysis puncture needle holder according to claim 1, characterized in that: The puncture needle placement plate (2) is in the shape of a rectangular parallelepiped, and the upper surface of the puncture needle placement plate (2) is provided with an arc-shaped groove (21) matching the puncture needle along its length direction and connecting the left and right sides, and the upper surface of the puncture needle placement plate (2) is located in the right area and is provided with a slot (22) for accommodating the butterfly wing handle of the puncture needle.

3. The hemodialysis puncture needle holder according to claim 2, characterized in that: The upper surface of the puncture needle placement plate (2) is located on both sides of the groove (21) and is provided with a guide groove (23) with a T-shaped cross section downwardly along its length direction, and the right side of the guide groove (23) is connected to the outer clamping groove (22), and a limit rod (24) for limiting the removal of the puncture needle butterfly wing handle is slidably arranged in the guide groove (23), and a protrusion (241) extending upward from the upper surface of the guide groove (23) is fixedly provided at the left end portion of the limit rod (24).

4. The hemodialysis puncture needle holder according to claim 3, characterized in that: The limiting rod (24) is made of iron material, and a receiving hole (25) is provided on the opposite side of the clamping slot (22) and the guide slot (23), wherein a magnet (251) is arranged in the receiving hole (25).

5. The hemodialysis puncture needle holder according to claim 4, characterized in that: A concave blind hole (26) is provided in the middle area of ​​the front and rear side walls of the puncture needle placement plate (2), and two rotating shafts (6) on the front and rear sides of the puncture needle placement plate (2) can be rotatably embedded in the concave blind hole (26).

6. The hemodialysis puncture needle holder according to claim 5, characterized in that: The slider (4) and the slide groove (31) are both T-shaped in transverse cross-section. The slider (4) can be slidably arranged in the slide groove (31) along the length direction of the slide groove (31). A threaded through hole (41) is arranged on the upper surface of the slider (4) and connected to the bottom. The fastening screw (5) is threadedly connected in the threaded through hole (41). When the fastening screw (5) is tightened, its bottom abuts against the bottom surface of the slide groove (31) under the reaction force, so that the slider (4) is fixed on the slide groove (31).

7. The hemodialysis puncture needle holder according to any one of claims 1 to 6, characterized in that: Restraint belts (7) are provided on the front and rear sides of the base (3).

8. The hemodialysis puncture needle holder according to claim 1, characterized in that: The invention also comprises a flow sensor (8), a single chip microcomputer (9), a loudspeaker (10) and a battery (11); the base (3) is provided with an installation cavity (32) inside, and the single chip microcomputer (9), the loudspeaker (10) and the battery (11) are all arranged in the installation cavity (32); the battery (11) is connected to the single chip microcomputer (9) for providing a working voltage; the flow sensor (8) is arranged at the end of the puncture needle placement plate (2) and is located on the side wall of the puncture needle catheter; the output end of the flow sensor (8) is connected to the single chip microcomputer (9) for monitoring the blood flow velocity in the catheter and sending the measured data to the single chip microcomputer (9); the loudspeaker (10) is connected to the single chip microcomputer (9); the single chip microcomputer (9) stores a preset value for detecting the blood flow velocity, and is used to trigger the loudspeaker (10) to alarm after receiving blood flow velocity data less than the preset value.

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