A hemodialysis puncture needle angle fixator

Abstract

The application belongs to the technical field of medical equipment, and discloses a blood dialysis puncture needle angle fixator, which comprises a bandage, the top end of the bandage is provided with a connecting plate, the inside of a gear buckle mechanism is provided with a needle, and the outside of the needle is connected with a conveying pipe. The cooperation of the first transmission gear, the first supporting block, the first reset spring and other structures enables the device to fix the needle and the conveying pipe, rotate the needle when puncturing, drive the second transmission gear to rotate through the rotating dial, drive the first and second racks to move through the shape of the second transmission gear, and then make the first and second limiting blocks disengage from the engagement with the first transmission gear. At this time, the angle of the needle can be adjusted by rotating the first transmission gear, and the first transmission gear is limited after adjustment, so as to achieve the purpose of facilitating the adjustment of the device to the needle.

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 edges 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 invention provides a hemodialysis puncture needle angle fixator, including a strap 1, a connecting plate 2 installed at the top end of the strap 1, a gear buckling mechanism 3 installed at the top end of the connecting plate 2, a measuring mechanism 4 fixed at the top end of the connecting plate 2, a limiting mechanism 5 installed on the outside of the connecting plate 2, a needle 6 disposed inside the gear buckling mechanism 3, and a delivery tube 7 connected to the outside of the needle 6.

[0033] The above scheme is adopted as follows: by inserting the needle 6 into the preset installation position inside the gear buckling mechanism 3 from the measuring mechanism 4, it is ensured that the body of the needle 6 and the rotation axis of the gear buckling mechanism 3 remain relatively concentric, providing a structural reference for subsequent angle adjustment. At the same time, the delivery tube 7 is inserted through the inner channel of the limiting mechanism 5, so that its end is precisely connected to and connected with the rear end interface of the needle 6, ensuring the sealing of the blood flow path. After the assembly of the needle 6 and the delivery tube 7 is completed, the connecting plate 2 is fixed to the limb position corresponding to the puncture site of the patient using the strap 1. The elastic design of the strap 1 can adapt to different limb dimensions, and after fixing, it can maintain the stability of the connecting plate 2, avoiding displacement during puncture operation and angle adjustment, laying the foundation for subsequent angle locking and precise puncture.

[0034] like Figures 1 to 4 As shown, the gear latching mechanism 3 includes a first transmission gear 301, a first support block 302, and a first return spring 303. The first transmission gear 301 is rotatably connected to the top of the connecting plate 2. The top of the connecting plate 2 is movably connected to the first support block 302. The first return spring 303 is fixed to the outside of the first support block 302. The first limiting block 304 is fixed to the outside of the first support block 302. A limiting groove is formed inside the first transmission gear 301. The outer wall of the first support block 302 is in contact with the inner wall of the connecting plate 2. The first support block 302 and the connecting plate 2 are slidably connected. The first return spring 303 is used to press the first support block 302 and keep it moving inward. The first limiting block 304 and the first transmission gear 301 are meshed together.

[0035] like Figures 1 to 4As shown, a first rack 305 is fixed to the top of the first support block 302, a second support block 306 is movably connected to the top of the connecting plate 2, a second return spring 307 is fixed to the outside of the second support block 306, the second support block 306 and the connecting plate 2 are slidably connected, the second return spring 307 is used to press the second support block 306 and keep it moving inward, the second return spring 307 is provided with two sets of symmetrically distributed about the central axis of the second support block 306, a second limiting block 308 is fixed to the outside of the second support block 306, a second rack 309 is fixed to the top of the second support block 306, a second transmission gear 310 is rotatably connected to the top of the first transmission gear 301, a dial 311 is fixed to the top of the second transmission gear 310, several sets of teeth are provided on the opposite sidewalls of the first rack 305 and the second rack 309, the second transmission gear 310 meshes with the first rack 305 and the second rack 309 simultaneously.

[0036] Using the above scheme: After the needle 6 and the delivery tube 7 are fixed by the limiting mechanism 5, when it is necessary to adjust the puncture angle of the needle 6, the dial 311 is rotated, which will drive the coaxially connected second transmission gear 310 to rotate synchronously. Since the second transmission gear 310 meshes with the first rack 305 and the second rack 309 respectively, during the rotation, it will drive the first rack 305 and the second rack 309 to move in opposite directions—the first rack 305 drives the first support block 302 to compress the first return spring 303 and slide outward, so that the first limiting block 304 disengages from the teeth of the first transmission gear 301. At the same time, the second rack 309 drives the second support block 306 to compress the second return spring 307 and slide outward, so that the second limiting block 308 also disengages. When disengaged, the first transmission gear 301 is unlocked and can rotate freely, thereby driving the needle 6 linked to it to rotate synchronously to adjust the angle. After the angle is adjusted to the target value, the dial 311 is released, and the first return spring 303 and the second return spring 307 release elastic potential energy, pushing the first support block 302 and the second support block 306 to reset respectively, so that the first limit block 304 and the second limit block 308 re-engage into the tooth gap of the first transmission gear 301, realizing bidirectional limiting of the first transmission gear 301 and ensuring that the angle of the needle 6 is fixed. This process, through the mechanical cooperation of gear transmission and spring reset, realizes the precise adjustment and stable locking of the needle angle, providing medical personnel with a controllable puncture angle benchmark and improving the standardization of operation.

[0037] like Figures 1 to 5As shown, the measuring mechanism 4 includes a measuring frame 401, a guide groove 402, and a magnetic indicator 403. The measuring frame 401 is fixed to the top of the connecting plate 2. The guide groove 402 is provided inside the measuring frame 401. The magnetic indicator 403 is movably connected inside the measuring frame 401. Several sets of scale lines are provided on the outer wall of the measuring frame 401. The inner wall of the measuring frame 401 is attached to the outer wall of the magnetic indicator 403. The measuring frame 401 and the magnetic indicator 403 are slidably connected. An indicator needle 404 is fixed to the outside of the magnetic indicator 403. A disk 405 is fixed to one end of the needle 6. Two sets of indicator needles 404 are provided. The indicator needles 404 are symmetrically distributed about the central axis of the magnetic indicator 403. Two sets of magnetic indicators 403 are provided. The magnetic indicator 403 and the disk 405 are magnetically connected.

[0038] The above scheme is adopted as follows: By fixing a disk 405 to the outside of the needle 6, and utilizing the magnetic attraction between the disk 405 and the magnetic indicator 403 inside the measuring frame 401, when the needle 6 rotates with the first transmission gear 301, the disk 405 can synchronously drive the magnetic indicator 403 to slide along the guide groove 402 inside the measuring frame 401. During the movement of the magnetic indicator 403, the two sets of indicator needles 404 fixed to its outside are displaced together, so that the indicator needles 404 accurately point to the preset scale line on the outer wall of the measuring frame 401. Since the scale line corresponds to the clinically commonly used puncture angle range of 0°-45°, medical personnel can intuitively read the real-time angle of the needle 6 through the scale indicated by the indicator needles 404, so as to achieve accurate measurement and control of the puncture angle and provide a clear angle reference for subsequent puncture operations.

[0039] like Figures 1 to 8 As shown, the limiting mechanism 5 includes a limiting seat 501, a limiting frame 502, and a limiting member 503. The limiting seat 501 is fixed to the outside of the first transmission gear 301. The limiting frame 502 is fixed inside the limiting seat 501. There are four sets of limiting frames 502, which are arranged in a circular array. One end of the limiting frame 502 is provided with an inclined surface. The limiting member 503 is threadedly connected inside the limiting seat 501. One end of the limiting member 503 is provided with an inclined surface. The limiting member 503 has a limiting hole inside, the diameter of which is equal to the diameter of the conveying pipe 7. The limiting member 503 has an arc groove 504 inside.

[0040] The above scheme is adopted as follows: After inserting the delivery tube 7 into the preset channel inside the first transmission gear 301 along the central axis of the limiting seat 501, the limiting member 503 is rotated. The limiting member 503 moves axially inward by utilizing the threaded engagement between the limiting member 503 and the limiting seat 501. The arc groove 504 inside the limiting member 503 contacts the inclined surface at one end of the limiting frame 502. As the limiting member 503 continues to move, the arc groove 504 generates radial extrusion force on the limiting frame 502, causing the four sets of limiting frames 502 arranged in a ring array to retract radially inward. During the retraction process, the inner wall of the limiting frame 502 gradually adheres to the outer wall of the delivery tube 7, and the delivery tube 7 is firmly fixed by the multi-directional clamping force. At the same time, the limiting hole inside the limiting member 503 is adapted to the diameter of the delivery tube 7, forming a double limiting, which prevents the delivery tube 7 from axial displacement or radial shaking during puncture and dialysis, thereby ensuring the stability of the puncture operation and the smoothness of blood flow.

[0041] The working principle and usage process of this invention are as follows: First, the needle 6 is inserted into the inside of the first transmission gear 301 through the opening of the measuring frame 401, and the delivery tube 7 is connected to the needle 6 after being inserted into the inside of the first transmission gear 301 through the limiting seat 501. The connecting plate 2 can be fixed by the strap 1 to facilitate subsequent puncture and fixation.

[0042] Secondly, after fixing the needle 6 and the delivery tube 7, when the needle 6 needs to be rotated to perform puncture, the rotating dial 311 drives the second transmission gear 310 to rotate, and the shape of the second transmission gear 310 drives the first rack 305 and the second rack 309 to move, thereby causing the first limiting block 304 and the second limiting block 308 to disengage from the first transmission gear 301. At this time, the angle of the needle 6 can be adjusted by rotating the first transmission gear 301. After adjustment, the hand is released, and the first return spring 303 and the second return spring 307 reset the first support block 302 and the second support block 306, thereby causing the first limiting block 304 and the second limiting block 308 to engage in the teeth of the first transmission gear 301 to limit the first transmission gear 301. After the angle of the needle 6 is adjusted, it is convenient for medical personnel to perform puncture.

[0043] Furthermore, by fixing a disk 405 to the outside of the needle 6, the needle 6 can drive the magnetic indicator 403 to move through its own magnetic force after rotation. After the magnetic indicator 403 moves, the indicator needle 404 is positioned on the scale line of the measuring frame 401. At this time, medical personnel can measure the angle of the needle 6. After inserting the delivery tube 7 into the first transmission gear 301, the limiting member 503 is rotated, causing the limiting member 503 to move inward and squeeze the limiting frame 502 through the arc groove 504, causing the limiting frame 502 to retract inward. The retraction of the limiting frame 502 then limits the delivery tube 7, thereby ensuring the stability of the puncture.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hemodialysis puncture needle angle fixator, comprising a strap (1), characterized in that: The top of the strap (1) is equipped with a connecting plate (2), the top of the connecting plate (2) is equipped with a gear buckle mechanism (3), the top of the connecting plate (2) is fixed with a measuring mechanism (4), the outside of the connecting plate (2) is equipped 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 connected to a delivery tube (7). The gear buckling mechanism (3) includes a first transmission gear (301), a first support block (302) and a first return spring (303). The first transmission gear (301) is rotatably connected to the top of the connecting plate (2). The top of the connecting plate (2) is movably connected to the first support block (302). The first return spring (303) is fixed to the outside of the first support block (302). The first limiting block (304) is fixed to the outside of the first support block (302). The top of the first support block (302) is fixed to the first rack (305). The measuring mechanism (4) includes a measuring frame (401), a guide groove (402), and a magnetic indicator (403). The measuring frame (401) is fixed to the top of the connecting plate (2). The measuring frame (401) has a guide groove (402) inside. The magnetic indicator (403) is movably connected inside the measuring frame (401). An indicator needle (404) is fixed to the outside of the magnetic indicator (403). A disk (405) is fixed to one end of the needle (6). The top of the connecting plate (2) is movably connected to a second support block (306), a second return spring (307) is fixed to the outside of the second support block (306), a second limit block (308) is fixed to the outside of the second support block (306), a second rack (309) is fixed to the top of the second support block (306), a second transmission gear (310) is rotatably connected to the top of the first transmission gear (301), and a dial (311) is fixed to the top of the second transmission gear (310). The first rack (305) and the second rack (309) are provided with several sets of teeth on their opposite sidewalls, and the second transmission gear (310) meshes with the first rack (305) and the second rack (309) simultaneously; The limiting mechanism (5) includes a limiting seat (501), a limiting frame (502), and a limiting member (503). The limiting seat (501) is fixed to the outside of the first transmission gear (301). The limiting frame (502) is fixed inside the limiting seat (501). The limiting member (503) is threadedly connected inside the limiting seat (501). An arc groove (504) is provided inside the limiting member (503).

2. The hemodialysis puncture needle angle fixator according to claim 1, characterized in that: The first transmission gear (301) has a limiting groove inside. 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 slidably connected. The first return spring (303) is used to squeeze the first support block (302) and keep it moving inward. The first limiting block (304) and the first transmission gear (301) are meshed.

3. The hemodialysis puncture needle angle fixator according to claim 1, characterized in that: The second support block (306) and the connecting plate (2) are slidably connected. The second return spring (307) is used to press the second support block (306) and keep it moving inward. The second return spring (307) is provided with two sets of symmetrically distributed about the central axis of the second support block (306).

4. The hemodialysis puncture needle angle fixator according to claim 1, characterized in that: The outer wall of the measuring frame (401) is provided with several sets of scale lines, the inner wall of the measuring frame (401) is attached to the outer wall of the magnetic indicator (403), and the measuring frame (401) and the magnetic indicator (403) are slidably connected.

5. The hemodialysis puncture needle angle fixator according to claim 4, characterized in that: The indicator needles (404) are provided in two sets, and the indicator needles (404) are symmetrically distributed about the central axis of the magnetic indicator (403). The magnetic indicator (403) is provided in two sets, and the magnetic indicator (403) and the disk (405) are magnetically connected.

6. The hemodialysis puncture needle angle fixator according to claim 1, characterized in that: The limiting frame (502) is provided in four sets, and the limiting frame (502) is arranged in a circular array. One end of the limiting frame (502) is provided with an inclined surface.

7. The hemodialysis puncture needle angle fixator according to claim 6, characterized in that: One end of the limiting member (503) is provided with an inclined surface, and a limiting hole is provided inside the limiting member (503), the diameter of which is equal to the diameter of the conveying pipe (7).

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