Hemodialysis puncture needle angle fixer

Abstract

The invention belongs to the technical field of medical equipment, and discloses a hemodialysis puncture needle angle fixator which comprises a bandage, a connecting plate is installed at the top end of the bandage, a needle head is arranged in a gear buckle mechanism, and the outside of the needle head communicates with a conveying pipe. Through cooperation of a first transmission gear, a first supporting block, a first reset spring and other structures, after a needle head and a conveying pipe are fixed by the device, when the needle head needs to be rotated for puncturing, a rotating drive plate drives a second transmission gear to rotate; a first rack and a second rack are driven to move through the shape of a second transmission gear, so that a first limiting block and a second limiting block are separated from meshing with the first transmission gear, at the moment, the angle of the needle head can be adjusted by rotating the first transmission gear, the first transmission gear is loosened after adjustment, and therefore the first transmission gear is limited; therefore, the purpose of conveniently adjusting the needle head by the device is achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of medical equipment, and particularly relates to a hemodialysis puncture needle angle fixator. BACKGROUND

[0002] As an important treatment method for patients with end-stage renal disease, the treatment effect of hemodialysis is closely related to the accuracy of puncture operation. In the hemodialysis process, the puncture needle needs to be inserted into the internal arteriovenous fistula or central venous catheter of the patient at a specific angle to establish an effective blood circulation channel. Clinical practice shows that the stability of the puncture angle directly affects the success rate of puncture and the incidence of postoperative complications. Among them, 0-45 degrees is a clinically recognized safe and efficient puncture angle range. At present, the clinical puncture operation mainly relies on the experience and hand feeling of medical staff for angle control, and lacks effective auxiliary fixing devices. This operation method has significant limitations: on the one hand, it is difficult for medical staff to keep the angle absolutely stable during puncture, especially when the patient's body position changes, the skin tension of the puncture site changes or the operation time is long, the puncture angle is easily deviated; on the other hand, for novice medical staff, the accuracy of angle control is lower due to lack of enough operation experience, which increases the risk of puncture failure.

[0003] Publication No. CN120093398A discloses a hemodialysis puncture needle fixator, which relates to the technical field of medical devices. The hemodialysis puncture needle fixator includes a connecting rod, a puncture needle placement plate, a base, a sliding block and a fastening screw. The base is used to be placed in front of the puncture site of the patient. The front and rear sides and the right side of the upper surface of the base are vertically provided with sliding grooves. The puncture needle placement plate is arranged on the upper surface of the base and located between the three sliding grooves, and is arranged in parallel with the front and rear sides of the upper surface of the base. The connecting rod and the sliding block are both provided with three. The upper surface of the sliding block is upwardly provided with a connecting lug. The three sliding blocks are slidably arranged in the three sliding grooves on the base. The middle region of the front and rear side walls of the puncture needle placement plate is vertically and rotatably connected with a rotating shaft. The rotating shaft is provided with a connecting lug connected to the opposite end of the puncture needle placement plate. The hemodialysis puncture needle fixator can arbitrarily change the fixed angle of the puncture needle, and effectively ensures the efficiency of dialysis treatment.

[0004] The puncture needle used in the clinic has various models, and the puncture needle specifications required by different patients and different puncture sites are different. The existing auxiliary tools are difficult to adapt to multiple needle types, further limiting the convenience and accuracy of puncture operation. Therefore, the development of a fixing device capable of accurately locking the 0-45 degree puncture angle and adapting to different needle types has important clinical significance for improving the stability and safety of hemodialysis puncture and reducing the incidence of complications. SUMMARY

[0005] To solve the problems in the background art, the present application provides a hemodialysis puncture needle angle fixator.

[0006] To achieve the above object, the present application provides the following technical scheme: a hemodialysis puncture needle angle fixator, comprising a bandage, a connecting plate is installed at the top end of the bandage, a gear buckle mechanism is installed at the top end of the connecting plate, a measuring mechanism is fixed at the top end of the connecting plate, a limiting mechanism is installed outside the connecting plate, a needle is arranged inside the gear buckle mechanism, and a delivery tube is communicated outside the needle.

[0007] The gear buckle mechanism comprises a first transmission gear, a first supporting block and a first return spring, the first transmission gear is rotationally connected at the top end of the connecting plate, the first supporting block is movably connected at the top end of the connecting plate, the first return spring is fixed outside the first supporting block, a first limiting block is fixed outside the first supporting block, and a first rack is fixed at the top end of the first supporting block.

[0008] The measuring mechanism comprises a measuring frame, a guide groove and a magnetic indicating element, the measuring frame is fixed at the top end of the connecting plate, the guide groove is formed inside the measuring frame, the magnetic indicating element is movably connected inside the measuring frame, an indicating needle is fixed outside the magnetic indicating element, and a magnetic disc is fixed at one end of the needle.

[0009] Preferably, a second supporting block is movably connected at the top end of the connecting plate, a second return spring is fixed outside the second supporting block, a second limiting block is fixed outside the second supporting block, a second rack is fixed at the top end of the second supporting block, a second transmission gear is rotationally connected at the top end of the first transmission gear, and a dial is fixed at the top end of the second transmission gear.

[0010] Preferably, a limiting groove is formed inside the first transmission gear, the outer wall of the first supporting block is attached to the inner wall of the connecting plate, the first supporting block and the connecting plate are slidingly connected, the first return spring is used to press the first supporting block and keep it moving inward, and the first limiting block is engaged with the first transmission gear.

[0011] Preferably, the second supporting block and the connecting plate are slidingly connected, the second return spring is used to press the second supporting block and keep it moving inward, and the second return spring is provided with two groups of symmetrically distributed axes about the second supporting block.

[0012] Preferably, a plurality of groups of teeth are arranged on the opposite side walls of the first rack and the second rack, and the second transmission gear is engaged with the first rack and the second rack at the same time.

[0013] Preferably, the outer wall of the measuring frame is provided with several sets of scale lines, the inner wall of the measuring frame is attached to the outer wall of the magnetic indicator, and the measuring frame and the magnetic indicator are in sliding connection.

[0014] Preferably, the indicator needle is provided with two sets, the indicator needle is symmetrically distributed about the central axis of the magnetic indicator, the magnetic indicator is provided with two sets, and the magnetic indicator and the magnetic disk are in magnetic connection.

[0015] Preferably, the limiting mechanism comprises a limiting seat, a limiting frame and a limiting piece, the limiting seat is fixed outside the first transmission gear, the inside of the limiting seat is fixed with the limiting frame, the inside of the limiting seat is threadedly connected with the limiting piece, and the inside of the limiting piece is provided with an arc groove.

[0016] Preferably, the limiting frame is provided with four sets, the limiting frames are arranged in a ring array, and one end of the limiting frame is provided with an inclined surface.

[0017] Preferably, one end of the limiting piece is provided with an inclined surface, the inside of the limiting piece is provided with a limiting hole, and the diameter of the limiting hole is equal to the diameter of the conveying pipe.

[0018] Compared with the prior art, the present application has the following advantages:

[0019] By cooperating the first transmission gear, the first supporting block, the first return spring and other structures, the device can fix the needle and the conveying pipe, rotate the dial to drive the second transmission gear to rotate, move the first rack and the second rack through the shape of the second transmission gear, and then make the first limiting block and the second limiting block disengage from the engagement with the first transmission gear, so that the angle of the needle can be adjusted by rotating the first transmission gear, and the first transmission gear is limited after adjustment, thereby achieving the purpose of facilitating the device to adjust the needle.

[0020] By cooperating the measuring frame, the guide groove, the magnetic indicator and other structures, the device can fix the magnetic disk outside the needle, drive the magnetic indicator to move through the magnetic force of the needle after the needle is rotated, make the indicator needle be located on the scale line of the measuring frame after the magnetic indicator moves, and enable the user to measure the angle and facilitate subsequent puncture.

[0021] By cooperating the limiting seat, the limiting frame, the limiting piece and other structures, the device can insert the conveying pipe into the inside of the first transmission gear, rotate the limiting piece, extrude the limiting frame through the arc groove after the limiting piece moves inward, make the limiting frame fold inward, and then limit the conveying pipe after the limiting frame is folded, thereby achieving the purpose of facilitating the device to limit the needle and the conveying pipe. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the whole structure schematic diagram of the application;

[0023] Figure 2 It is the connecting plate structure schematic diagram of the application;

[0024] Figure 3 It is the angle adjustment rear structure schematic diagram of the application;

[0025] Figure 4 It is the gear buckle mechanism structure schematic diagram of the application;

[0026] Figure 5 It is the measurement mechanism structure schematic diagram of the application;

[0027] Figure 6 It is the limiting mechanism structure schematic diagram of the application;

[0028] Figure 7 It is the limiting mechanism cross-section structure schematic diagram of the application;

[0029] Figure 8 It is the limiting mechanism left view structure schematic diagram of the application.

[0030] In the figure: 1, bandage; 2, connecting plate; 3, gear buckle mechanism; 301, first transmission gear; 302, first support block; 303, first reset spring; 304, first limiting block; 305, first rack; 306, second support block; 307, second reset spring; 308, second limiting block; 309, second rack; 310, second transmission gear; 311, dial; 4, measurement mechanism; 401, measurement frame; 402, guide groove; 403, magnetic indicating piece; 404, indicating needle; 405, magnetic disc; 5, limiting mechanism; 501, limiting seat; 502, limiting frame; 503, limiting piece; 504, arc groove; 6, needle; 7, delivery tube. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0032] As Figures 1 to 8As shown, the present application provides a hemodialysis puncture needle angle fixator, which comprises a bandage 1, the top end of the bandage 1 is provided with a connecting plate 2, the top end of the connecting plate 2 is provided with a gear buckle mechanism 3, the top end of the connecting plate 2 is fixedly provided with a measuring mechanism 4, the outside of the connecting plate 2 is provided with a limiting mechanism 5, the inside of the gear buckle mechanism 3 is provided with a needle 6, and the outside of the needle 6 is communicated with a delivery tube 7.

[0033] By the above scheme: by inserting the needle 6 into the preset installation position inside the gear buckle mechanism 3 from the measuring mechanism 4, the body of the needle 6 and the rotating axis of the gear buckle mechanism 3 are kept relatively concentric, which provides a structural reference for subsequent angle adjustment, at the same time, the delivery tube 7 is inserted through the inside channel of the limiting mechanism 5, so that the end thereof is accurately connected with the rear end of the needle 6 and communicated, which ensures the sealing of the blood circulation path, after the assembly of the needle 6 and the delivery tube 7, the connecting plate 2 is fixed on the limb position corresponding to the puncture position of the patient by the bandage 1, the elastic design of the bandage 1 can adapt to different limb dimensions, and the stability of the connecting plate 2 can be maintained after being fixed, which avoids displacement during puncture operation and angle adjustment, and lays a foundation for subsequent angle locking and accurate puncture.

[0034] As shown in the Figures 1 to 4 The gear buckle mechanism 3 comprises a first transmission gear 301, a first support block 302 and a first return spring 303, the first transmission gear 301 is rotationally connected at the top end of the connecting plate 2, the top end of the connecting plate 2 is movably connected with the first support block 302, the outside of the first support block 302 is fixedly provided with the first return spring 303, the outside of the first support block 302 is fixedly provided with a first limiting block 304, a limiting groove is formed in the inside of the first transmission gear 301, the outer wall of the first support block 302 is attached to the inner wall of the connecting plate 2, the first support block 302 and the connecting plate 2 are slidingly connected, the first return spring 303 is used for pressing the first support block 302 and keeping it moving inward, and the first limiting block 304 is engaged with the first transmission gear 301.

[0035] As shown in the Figures 1 to 4As shown, the top end of the first support block 302 is fixed with a first rack 305, the top end of the connecting plate 2 is movably connected with a second support block 306, the outer part of the second support block 306 is fixed with a second reset spring 307, the second support block 306 and the connecting plate 2 are slidingly connected, the second reset spring 307 is used for extruding the second support block 306 and making it keep a tendency of moving inward, the second reset spring 307 is provided with two groups of symmetrical distribution about the central axis of the second support block 306, the outer part of the second support block 306 is fixed with a second limiting block 308, the top end of the second support block 306 is fixed with a second rack 309, the top end of the first transmission gear 301 is rotatably connected with a second transmission gear 310, the top end of the second transmission gear 310 is fixed with a dial 311, the opposite side walls of the first rack 305 and the second rack 309 are provided with a plurality of groups of teeth, and the second transmission gear 310 is engaged with the first rack 305 and the second rack 309 at the same time.

[0036] By adopting the above scheme: after the needle 6 and the delivery tube 7 are fixed through the limiting mechanism 5, when it is needed to adjust the puncture angle of the needle 6, the dial 311 is rotated, which drives the coaxially connected second transmission gear 310 to rotate synchronously, since the second transmission gear 310 is engaged with the first rack 305 and the second rack 309 respectively, in the rotating process, the first rack 305 and the second rack 309 are driven to move in opposite directions, that is, the first rack 305 drives the first support block 302 to compress the first reset spring 303 to slide outward, so that the first limiting block 304 is disengaged from the tooth engagement of the first transmission gear 301, at the same time, the second rack 309 drives the second support block 306 to compress the second reset spring 307 to slide outward, so that the second limiting block 308 is also disengaged from the engagement, at this time, the first transmission gear 301 is in an unlocked state and can be freely rotated, and then drives the needle 6 connected therewith to rotate synchronously to adjust the angle, after the angle is adjusted to the target value, the dial 311 is released, the first reset spring 303 and the second reset spring 307 release the elastic potential energy and respectively push the first support block 302 and the second support block 306 to reset, so that the first limiting block 304 and the second limiting block 308 are re-engaged into the tooth gap of the first transmission gear 301, realizing the bidirectional limiting of the first transmission gear 301, ensuring the angle fixation of the needle 6, through the mechanical cooperation of the gear transmission and the spring reset, the precise adjustment and stable locking of the needle angle are realized, and a controllable puncture angle reference is provided for medical staff, improving the operation standardization.

[0037] As Figures 1 to 5As shown, the measuring mechanism 4 comprises a measuring frame 401, a guide groove 402 and a magnetic indicating piece 403, the measuring frame 401 is fixed at the top end of the connecting plate 2, the inside of the measuring frame 401 is provided with the guide groove 402, the inside of the measuring frame 401 is movably connected with the magnetic indicating piece 403, the outer wall of the measuring frame 401 is provided with a plurality of scale lines, the inner wall of the measuring frame 401 is attached to the outer wall of the magnetic indicating piece 403, the measuring frame 401 and the magnetic indicating piece 403 are slidingly connected, the outside of the magnetic indicating piece 403 is fixed with an indicating needle 404, one end of the needle 6 is fixed with a magnetic disc 405, the indicating needle 404 is provided with two groups, the indicating needle 404 is symmetrically distributed about the central axis of the magnetic indicating piece 403, the magnetic indicating piece 403 is provided with two groups, and the magnetic indicating piece 403 and the magnetic disc 405 are magnetically connected.

[0038] By fixing the magnetic disc 405 outside the needle 6, using the magnetic force adsorption between the magnetic disc 405 and the magnetic indicating piece 403 inside the measuring frame 401, when the needle 6 rotates with the first transmission gear 301, the magnetic disc 405 can drive the magnetic indicating piece 403 to slide along the guide groove 402 inside the measuring frame 401, and the two groups of indicating needles 404 fixed outside the magnetic indicating piece 403 move together, finally the indicating needle 404 accurately points to the scale line on the outer wall of the measuring frame 401, since the scale line corresponds to the commonly used 0°-45° puncture angle range in clinic, at this time the medical staff can directly read the real-time angle of the needle 6 through the indicating needle 404, realize the accurate measurement and control of the puncture angle, and provide a clear angle reference for subsequent puncture operation.

[0039] As shown in Figures 1 to 8 The limiting mechanism 5 comprises a limiting seat 501, a limiting frame 502 and a limiting piece 503, the limiting seat 501 is fixed outside the first transmission gear 301, the inside of the limiting seat 501 is fixed with the limiting frame 502, the limiting frame 502 is provided with four groups, the limiting frame 502 is arranged in a ring array, one end of the limiting frame 502 is provided with an inclined surface, the inside of the limiting seat 501 is threadedly connected with the limiting piece 503, one end of the limiting piece 503 is provided with an inclined surface, the inside of the limiting piece 503 is provided with a limiting hole, the diameter of the limiting hole is equal to the diameter of the delivery tube 7, and the inside of the limiting piece 503 is provided with an arc groove 504.

[0040] With the above scheme: by inserting the conveying pipe 7 along the central axis of the limiting seat 501 into the preset channel inside the first transmission gear 301, rotating the limiting piece 503, using the threaded cooperation between the limiting piece 503 and the limiting seat 501 to make the limiting piece 503 move inward along the axial direction, the arc groove 504 inside the limiting piece 503 contacts the inclined surface at one end of the limiting frame 502, with the continuous movement of the limiting piece 503, the arc groove 504 generates a radial extrusion force on the limiting frame 502, prompting the four groups of limiting frames 502 distributed in an annular array to fold inward along the radial direction, the inner wall of the limiting frame 502 gradually fits the outer wall of the conveying pipe 7 during the folding process, firmly fixing the conveying pipe 7 through the multidirectional clamping force, at the same time, the limiting hole inside the limiting piece 503 is adapted to the diameter of the conveying pipe 7, forming double limiting, avoiding the axial displacement or radial shaking of the conveying pipe 7 during the puncture and dialysis process, thereby ensuring the stability of the puncture operation and the smoothness of the blood flow.

[0041] The working principle and use process of the present application: first, insert the needle 6 into the inside of the first transmission gear 301 from the opening between the measuring frame 401, and connect the conveying pipe 7 through the limiting seat 501 into the inside of the first transmission gear 301 with the needle 6, and can fix the connecting plate 2 through the bandage 1, which is convenient for subsequent puncture fixation.

[0042] Secondly, after fixing the needle 6 and the conveying pipe 7, when rotating the angle of the needle 6 and puncturing, rotating the dial 311 to drive the second transmission gear 310 to rotate, and moving the first rack 305 and the second rack 309 through the shape of the second transmission gear 310, so that the first limiting block 304 and the second limiting block 308 are disengaged from the meshing with the first transmission gear 301, at this time, the angle of the needle 6 can be adjusted by rotating the first transmission gear 301, and after adjusting, the hand is released, at this time, the first return spring 303 and the second return spring 307 reset the first supporting block 302 and the second supporting block 306, so that the first limiting block 304 and the second limiting block 308 are clamped into the teeth of the first transmission gear 301 to limit the first transmission gear 301, and the needle 6 can be conveniently punctured by medical staff after adjusting the angle.

[0043] And the magnetic disk 405 is fixed outside the needle 6, so that the needle 6 can drive the magnetic indicating piece 403 to move through its own magnetic force after rotating, so that the indicating needle 404 is located on the scale line of the measuring frame 401 after the magnetic indicating piece 403 moves, at this time, medical staff can measure the angle of the needle 6, by inserting the conveying pipe 7 into the inside of the first transmission gear 301, rotating the limiting piece 503, making the limiting piece 503 move inward and extruding the limiting frame 502 through the arc groove 504, so that the limiting frame 502 folds inward, and then the limiting frame 502 is limited after folding, so as to ensure the stability of the puncture.

[0044] It has to be noted that, in the present document, the terms "first", "second", etc. merely serve to identify a subject or action, without necessarily requiring or implying any such actual relationship or order between such subjects or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0045] While embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, combinations, and variations of the embodiments can be undertaken without departing from the spirit and scope of the present application, which is defined by the appended claims and their equivalents.

Claims

1. A haemodialysis needle angle fixator comprising a strap (1), characterised in that: The top end of the bandage (1) is provided with a connecting plate (2), the top end of the connecting plate (2) is provided with a gear buckle mechanism (3), the top end of the connecting plate (2) is fixedly provided with a measuring mechanism (4), the outer portion of the connecting plate (2) is provided with a limiting mechanism (5), the inner portion of the gear buckle mechanism (3) is provided with a needle (6), and the outer portion of the needle (6) is communicated with a conveying pipe (7). The gear buckle mechanism (3) comprises a first transmission gear (301), a first supporting block (302) and a first reset spring (303), the first transmission gear (301) is rotatably connected to the top end of the connecting plate (2), the top end of the connecting plate (2) is movably connected with the first supporting block (302), the outer portion of the first supporting block (302) is fixedly provided with the first reset spring (303), the outer portion of the first supporting block (302) is fixedly provided with a first limiting block (304), and the top end of the first supporting block (302) is fixedly provided with a first rack (305). The measuring mechanism (4) comprises a measuring frame (401), a guide groove (402) and a magnetic indicating element (403), the measuring frame (401) is fixed to the top end of the connecting plate (2), the inner portion of the measuring frame (401) is provided with the guide groove (402), the inner portion of the measuring frame (401) is movably connected with the magnetic indicating element (403), the outer portion of the magnetic indicating element (403) is fixedly provided with an indicating needle (404), and one end of the needle (6) is fixedly provided with a magnetic disc (405).

2. The hemodialysis needle angle holder of claim 1, wherein: The top end of the connecting plate (2) is movably connected with a second supporting block (306), the outer portion of the second supporting block (306) is fixedly provided with a second reset spring (307), the outer portion of the second supporting block (306) is fixedly provided with a second limiting block (308), the top end of the second supporting block (306) is fixedly provided with a second rack (309), the top end of the first transmission gear (301) is rotatably connected with a second transmission gear (310), and the top end of the second transmission gear (310) is fixedly provided with a dial (311).

3. The hemodialysis needle angle holder of claim 1, wherein: The inner portion of the first transmission gear (301) is provided with a limiting groove, the outer wall of the first supporting block (302) is attached to the inner wall of the connecting plate (2), the first supporting block (302) and the connecting plate (2) are slidably connected, the first reset spring (303) is used for pressing the first supporting block (302) and keeping it in a moving trend inwardly, and the first limiting block (304) is engagedly connected with the first transmission gear (301).

4. The hemodialysis needle angle holder of claim 2, wherein: The second supporting block (306) and the connecting plate (2) are slidably connected, the second reset spring (307) is used for pressing the second supporting block (306) and keeping it in a moving trend inwardly, and the second reset spring (307) is provided with two groups of symmetrically distributed axes about the second supporting block (306).

5. The hemodialysis needle angle holder of claim 2, wherein: The opposite side walls of the first rack (305) and the second rack (309) are provided with a plurality of groups of teeth, and the second transmission gear (310) is engagedly connected with the first rack (305) and the second rack (309).

6. The hemodialysis needle angle holder of claim 1, wherein: The outer wall of the measuring frame (401) is provided with several groups of scale lines, the inner wall of the measuring frame (401) is attached to the outer wall of the magnetic indicating part (403), and the measuring frame (401) and the magnetic indicating part (403) are in sliding connection.

7. The hemodialysis needle angle holder of claim 6, wherein: The indicating needle (404) is provided with two groups, which are symmetrically distributed about the central axis of the magnetic indicating part (403), the magnetic indicating part (403) is provided with two groups, and the magnetic indicating part (403) and the magnetic disk (405) are magnetically connected.

8. The hemodialysis needle angle holder of claim 1, wherein: The limiting mechanism (5) comprises a limiting seat (501), a limiting frame (502) and a limiting piece (503), the limiting seat (501) is fixed outside the first transmission gear (301), the inside of the limiting seat (501) is fixed with the limiting frame (502), the inside of the limiting seat (501) is threadedly connected with the limiting piece (503), and the inside of the limiting piece (503) is provided with an arc groove (504).

9. The hemodialysis needle angle holder of claim 8, wherein: The limiting frame (502) is provided with four groups, which are arranged in an annular array, and one end of the limiting frame (502) is provided with an inclined surface.

10. The hemodialysis needle angle holder of claim 8, wherein: One end of the limiting piece (503) is provided with an inclined surface, the inside of the limiting piece (503) is provided with a limiting hole, and the diameter of the limiting hole is equal to the diameter of the conveying pipe (7).

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