Position fixer for radial artery puncture

Abstract

The utility model relates to hand fixer technical field especially relates to a body position fixer of radial artery puncture, including cushion, is equipped with the restraint belt on the cushion, still include the fixed base, the fixed base is connected in one side of cushion, the fixed base is equipped with rack, gear and rocker inside, the rack is set up vertically, the rack and gear engage, the lower extreme of rack is equipped with the clamping block, the fixed base outside rotates and is equipped with the rocker, the rocker is used for controlling gear rotation, the fixed base outside is equipped with a plurality of fixed slots along the circumference of ratchet wheel rotation, is equipped with spiral bolt on the rocker, and spiral bolt and fixed slot cooperation realize the locking of rocker, the utility model discloses through the fixed base and clamping block cooperation, combine rocker, gear, rack, ratchet wheel and pawl, realize the firm clamping of device and operating platform side edge and height adjustment, strengthened the overall stability and adaptability of equipment in the use process.

Description

Technical Field

[0001] This utility model relates to the field of hand immobilization technology, and in particular to a body position immobilization device for radial artery puncture. Background Technology

[0002] Radial artery puncture is a common and important procedure in clinical medicine, widely used in arterial blood gas analysis, continuous invasive arterial pressure monitoring (such as ABP monitoring), percutaneous coronary intervention (PCI), and the establishment of hemodialysis access. However, successful radial artery puncture highly depends on the stability and precision of the procedure. The ideal puncture angle (usually 30°-45°) and wrist dorsiflexion position (approximately 30°-45°) need to be maintained stably to fully expose the radial artery and facilitate smooth needle insertion. Traditionally, an assistant manually stabilizes the patient's wrist, or the operator maintains the position with one hand while performing the puncture with the other. Manual fixation is prone to fatigue and makes it difficult to maintain a constant angle and pressure for extended periods.

[0003] A Chinese patent application (CN223081670U) discloses a radial artery puncture aid, comprising: a forearm with a semi-circular interior and first wings on both sides; a posterior arm detachably connected to the forearm, also with a semi-circular interior and second wings on both sides; an adjustment component located at the rear end of the forearm and engaging with the posterior arm to adjust the angle between the forearm and posterior arm; and a restraint component located at the bottom of the forearm and posterior arm for securing the patient's arm. While this patent can elevate the patient's wrist to expose the radial artery, facilitating radial artery puncture, the device can only be placed flat on an operating table during use. There is no reliable connection between the device and the operating table, and given the limited space on the operating table, the device is highly susceptible to falling off due to uncontrolled patient movement or operator error, posing a safety hazard.

[0004] Therefore, it is necessary to design a positioning device for radial artery puncture to solve the above-mentioned technical problems. Utility Model Content

[0005] In order to overcome the shortcomings of existing fixation devices and operating tables that cannot be reliably connected, this utility model provides a position fixation device for radial artery puncture.

[0006] The technical solution of this utility model is: a positioning device for radial artery puncture, comprising a pad with a groove on its upper surface and a restraint strap on the pad, and a fixing seat connected to one side of the pad; the fixing seat contains a rack, a gear, and a rocker arm, the rack being vertically erected and meshing with the gear, a locking block at the lower end of the rack, and a rocker arm rotatably mounted on the outside of the fixing seat for controlling the rotation of the gear; the outside of the fixing seat has multiple fixing grooves along the circumference of the ratchet, and the rocker arm has a helical pin that engages with the fixing grooves to lock the rocker arm.

[0007] Preferably, it further includes a ratchet, which is coaxially connected to the gear. The rocker arm is provided with a pawl, one end of which is rotatably connected to the rocker arm, and the other end abuts against the side of the ratchet teeth. A first spring is also provided between the rocker arm and the pawl. The rocker arm is also provided with a slidable push block. The pawl is located on the sliding path of the push block, and the sliding path is tangent to the rotation direction of the pawl.

[0008] Preferably, the spiral pin includes a knob, a groove rod, and a limiting block. The knob is fixedly connected to one end of the groove rod, and the rocker arm is provided with a screw hole that mates with the groove rod. The groove rod is screwed into the screw hole, and the limiting block is fixedly connected to the other end of the groove rod. The limiting block corresponds to the fixing groove.

[0009] Preferably, the push block is provided with a grip for hand use, and a right-side rubber sleeve is fitted onto the grip.

[0010] Preferably, the pad includes an arm support portion and a back-of-hand support portion, a fixing strip on one side of the back-of-hand support portion of the pad, a first Velcro strap on the inner side of the restraint strap, and a second Velcro strap on the outer side of the fixing strip.

[0011] Preferably, the pad has pin holes on both sides, and the fixing seat has pins corresponding to the pin holes. The pad and the fixing seat are detachably connected through the pins and pin holes.

[0012] Preferably, a second spring is provided between the fixing seat and the locking block.

[0013] Preferably, the upper surface of the card block is provided with an anti-slip pad.

[0014] Preferably, the lower end of the rack is further provided with a lever, and the mounting position of the lever is opposite to that of the locking block.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model uses a fixed base and a locking block in combination with a rocker arm, gear, rack, ratchet and pawl to achieve stable clamping and height adjustment between the device and the side of the operating table, thereby enhancing the overall stability and adaptability of the equipment during use.

[0016] 2. By setting anti-slip pads at the bottom of the fixed base and the top of the locking block, this utility model effectively increases the friction of the parts in contact with the table surface, prevents the device from slipping during the puncture process, and significantly improves the safety and reliability of the operation.

[0017] 3. The present invention uses an unlocking mechanism consisting of a push block, a pawl, and a first spring to achieve rapid separation of the pawl and the ratchet, which facilitates quick unlocking when needed and allows the limit block to slide freely, making the device adjustment more flexible and convenient.

[0018] 4. This utility model can effectively position and support the patient's wrist through the groove set on the top of the pad, keeping it in a natural dorsiflexion state. Then, through the cooperation of the binding strap, fixing strip, first Velcro and second Velcro, a firm and adjustable binding fixation of the palm area is achieved, taking into account both the fixation effect and the patient's comfort. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the first and second hook and loop fasteners and other components of this utility model.

[0021] Figure 3 This is a three-dimensional structural diagram of the anti-slip pad, rack, and lever components of this utility model.

[0022] Figure 4 This is a three-dimensional structural diagram of the anti-slip pad, rack, and lever components of this utility model.

[0023] Figure 5 This is a three-dimensional sectional view of the ratchet, fixed housing, and rocker arm components of this utility model.

[0024] Figure 6 This is a three-dimensional sectional view of the gear, ratchet, and fixed housing components of this utility model.

[0025] Figure 7 for Figure 6 A magnified structural diagram of point A in the middle.

[0026] Figure 8 A three-dimensional sectional view of the fixed shell, rocker arm, and pawl components of this utility model.

[0027] Figure 9 This is a three-dimensional sectional view of the components of this utility model, including the fixed shell, lower shell, and fixing groove.

[0028] Figure 10This is a three-dimensional sectional view of the fixed shell, lower shell, and knob components of this utility model.

[0029] Figure 11 This is a three-dimensional sectional view of the lower housing, groove rod, and limiting block of this utility model.

[0030] Figure 12 This is a three-dimensional structural diagram of the knob, groove rod, and limiting block of this utility model.

[0031] Figure 13 This is a three-dimensional structural diagram of the grooved rod of this utility model.

[0032] Figure 14 This is a three-dimensional structural diagram of the fixing groove, the slot, and the limiting block of this utility model.

[0033] In the attached diagram, the following labels are used: 1-pad, 2-binding strap, 3-fixing strip, 4-pin hole (4), 5-first Velcro, 6-second Velcro, 7-groove, 8-fixing seat, 9-block, 10-second spring, 11-anti-slip pad, 12-rack, 13-pull block, 14-gear, 15-ratchet, 16-pin, 17-rocker, 18-pawl, 19-first spring, 20-push block, 21-rubber sleeve, 23-fixing groove, 25-knob, 26-groove rod, 27-limiting block. Detailed Implementation

[0034] Example: A positioning device for radial artery puncture, such as Figures 1-10 As shown, the device includes a pad 1 with a groove 7 on its upper surface and a restraint strap 2. It also includes a fixing seat 8 connected to one side of the pad 1. The fixing seat contains a rack 12, a gear 14, and a rocker arm 17. The rack 12 is vertically positioned and meshes with the gear 14. A locking block 9 is located at the lower end of the rack. The rocker arm 17 is rotatably mounted on the outside of the fixing seat 8 to control the rotation of the gear 14. Multiple fixing grooves 23 are provided on the outside of the fixing seat 8 along the circumference of the ratchet. A helical pin is provided on the rocker arm 17, which engages with the fixing grooves 23 to lock the rocker arm 17.

[0035] Furthermore, it also includes a ratchet 15, which is coaxially connected to the gear 14. The rocker arm 17 is provided with a pawl 18, one end of which is rotatably connected to the rocker arm 17, and the other end abuts against the side of the teeth of the ratchet 15. A first spring 19 is also provided between the rocker arm 17 and the pawl 18. The rocker arm 17 is also provided with a slidable push block 20. The pawl 18 is located on the sliding path of the push block 20, and the sliding path is tangent to the rotation direction of the pawl 18.

[0036] Furthermore, the spiral pin includes a knob 25, a groove rod 26, and a limiting block 27. The knob 25 is fixedly connected to one end of the groove rod 26. The rocker arm 17 is provided with a screw hole that mates with the groove rod 26. The groove rod 26 is screwed into the screw hole. The limiting block 27 is fixedly connected to the other end of the groove rod 26. The limiting block 27 corresponds to the fixing groove 23. A marking point is provided on the upper front side of the knob 25. In this embodiment, the groove rod 26 is provided with a single-lead spiral groove. Through the cooperation of the single-lead spiral groove and the screw hole, the groove rod only needs to rotate 180° to push the limiting block 27 into the fixing groove 23, further shortening the operation time of medical staff.

[0037] Furthermore, the push block 20 is provided with a hand grip, and a right-side rubber sleeve 21 is fitted on the hand grip to enhance the grip strength of medical staff.

[0038] Furthermore, the pad 1 includes an arm support portion and a back-of-hand support portion. The back-of-hand support portion of the pad 1 has a fixing strip 3 on one side. The inner side of the restraint strap 2 is provided with a first Velcro 5, and the outer side of the fixing strip 3 is provided with a second Velcro 6.

[0039] Furthermore, the pad 1 has pin holes 4 on both sides, and the fixing seat 8 has pins 16 corresponding to the pin holes 4. The pad 1 and the fixing seat 8 are detachably connected through the pins 16 and the pin holes 4.

[0040] Furthermore, a second spring 10 is provided between the fixed base 8 and the locking block 9.

[0041] Furthermore, such as Figure 1 , Figure 3 and Figure 4 As shown, the upper surface of the card block 9 is provided with an anti-slip pad 11.

[0042] Furthermore, the lower end of the rack 12 is provided with a lever 13, and the mounting position of the lever 13 is opposite to that of the locking block 9.

[0043] When radial artery puncture is required, first adjust the fixation seat 8 and the locking block 9 to the side suitable for the patient using the pin 16 and pin hole 4. Then, by turning the knob 25, the limiting block 27 is disengaged from the fixing groove 23. The markings on the knob 25 make it easy to see the rotation status of the knob 25. Then, turn the rocker arm 17. The rocker arm 17 drives the pawl 18 to push the ratchet 15 and gear 14 to rotate. The gear 14 meshes with the rack 12, thereby driving the rack 12 to slide up and down in the fixation seat 8. The rack 12 drives the locking block 9 at its bottom to move synchronously, realizing height adjustment, thereby clamping the operating table. Then, by turning the knob 25, the groove rod 26 pushes the limiting block 27 to engage in the fixing groove 23, realizing the locking of the fixation shell 16 and the rocker arm 17. It can stably maintain the height in any position and prevent slippage due to gravity or external force. The anti-slip pad 11 set on the top right side of the locking block 9, when in contact with the support surface To increase friction and prevent slippage during use, ensuring overall stability, a second spring 10 is connected between the bottom rear side of the fixed base 8 and the rear side of the locking block 9. When the locking block 9 is moved by the adjustment mechanism, the second spring 10 is stretched or compressed to provide auxiliary reset force and enhance structural stability. When it is necessary to release the height lock for quick adjustment or reset, push the push block 20 to the left. The push block 20 presses against the pawl 18 to the left, causing it to overcome the elastic force of the first spring 19 and rotate around the fulcrum. This disengages the upper right part of the pawl 18 from the ratchet 15. At this time, the rack 12 and the locking block 9 can slide freely under external force. The locking block 9 can be manually pulled by the lever 13 to achieve quick adjustment. Then, release the push block 20. The first spring 19 drives the pawl 18 to reset. The pawl 18 re-engages with the ratchet 15 and returns to the locked state. The rubber block 21 prevents the push block 20 from colliding with the rocker arm 17 when resetting.

[0044] After installing the device, place the patient's forearm stably on the pad 1, with the wrist dorsiflexed and placed in the groove 7 at the top of the pad 1, ensuring that the radial artery is fully exposed. Then, wrap the restraint strap 2 around the patient's palm side, and the first Velcro 5 on it is bonded to the second Velcro 6 on the left side of the fixing strip 3, thereby firmly fixing the patient's wrist and forearm to the pad 1.

Claims

1. A positioning device for radial artery puncture, comprising a pad (1), wherein a groove (7) is formed on the upper surface of the pad (1), and a restraint strap (2) is provided on the pad (1), characterized in that: It also includes a fixed seat (8), which is connected to one side of the pad (1); the fixed seat is provided with a rack (12), a gear (14) and a rocker arm (17), the rack (12) is vertically erected, the rack (12) and the gear (14) mesh, the lower end of the rack is provided with a locking block (9), the outside of the fixed seat (8) is provided with a rocker arm (17), the rocker arm (17) is used to control the rotation of the gear (14); the outside of the fixed seat (8) is provided with a plurality of fixing grooves (23) along the circumference of the ratchet, the rocker arm (17) is provided with a spiral pin, the spiral pin cooperates with the fixing groove (23) to lock the rocker arm (17).

2. The positioning device for radial artery puncture according to claim 1, characterized in that: It also includes a ratchet (15), which is coaxially connected to the gear (14). The rocker arm (17) is provided with a pawl (18). One end of the pawl (18) is rotatably connected to the rocker arm (17), and the other end abuts against the side of the tooth of the ratchet (15). A first spring (19) is also provided between the rocker arm (17) and the pawl (18). The rocker arm (17) is also provided with a sliding push block (20). The pawl (18) is located on the sliding path of the push block (20), and the sliding path is tangent to the rotation direction of the pawl (18).

3. The position fixation device for radial artery puncture according to claim 1, characterized in that: The spiral pin includes a knob (25), a groove rod (26), and a limiting block (27). The knob (25) is fixedly connected to one end of the groove rod (26). The rocker arm (17) is provided with a screw hole that mates with the groove rod (26). The groove rod (26) is screwed into the screw hole. The limiting block (27) is fixedly connected to the other end of the groove rod (26). The limiting block (27) corresponds to the fixing groove (23).

4. The position fixation device for radial artery puncture according to claim 2, characterized in that: The push block (20) is provided with a grip for hand use, and a right-side rubber sleeve (21) is fitted on the grip.

5. A positioning device for radial artery puncture according to any one of claims 1-4, characterized in that: The pad (1) includes an arm support and a back of hand support. The pad (1) has a fixing strip (3) on one side of the back of hand support. The inner side of the binding strap (2) is provided with a first Velcro (5), and the outer side of the fixing strip (3) is provided with a second Velcro (6).

6. A positional fixation device for radial artery puncture according to any one of claims 1-4, characterized in that: The pad (1) has pin holes (4) on both sides, and the fixing seat (8) has pins (16) corresponding to the pin holes (4). The pad (1) and the fixing seat (8) are detachably connected through the pins (16) and the pin holes (4).

7. A positioning device for radial artery puncture according to any one of claims 1-4, characterized in that: A second spring (10) is provided between the fixed base (8) and the locking block (9).

8. A positional fixation device for radial artery puncture according to any one of claims 1-4, characterized in that: The upper surface of the card block (9) is provided with an anti-slip pad (11).

9. A positional fixation device for radial artery puncture according to any one of claims 1-4, characterized in that: The lower end of the rack (12) is also provided with a lever (13), and the mounting position of the lever (13) is opposite to that of the locking block (9).

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