A distal radial artery arm puncture brace

Abstract

The utility model relates to the field of medical auxiliary instrument, concretely relates to a far end radial artery arm puncture brace. The utility model discloses arm support unit and palm part positioning block. Arm support unit is composed of attitude adjusting part and arm carrying part, and attitude adjusting part can fix the brace on the support such as interventional operating bed, and can adjust the height and horizontal angle of arm carrying part. Palm part positioning block is installed on arm carrying part through sliding assembly, can slide along the arm direction and lock the position, has the inclined support surface and thumb positioning part, can support the palm of patient and makes the wrist joint keep the back extension state, simultaneously realizes thumb abduction through thumb positioning part, and fully exposes the puncture part of snuff area. The utility model is simple to operate, can stably fix the arm of patient, improves the puncture success rate, and is suitable for left and right hand operation.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary devices, specifically to a distal radial artery arm puncture brace. Background Technology

[0002] Distal radial artery puncture is a significant advancement in interventional therapy, offering advantages over traditional radial artery puncture methods, including fewer postoperative complications, greater patient comfort, and better protection of the arterial access route. However, this technique demands extremely high levels of hand positioning and stability. The patient's wrist must be elevated and kept in moderate dorsiflexion with the thumb abducted to fully expose the distal radial artery located in the snuffbox area, and absolute stability must be maintained throughout the entire puncture process.

[0003] In clinical practice, several auxiliary devices have been developed to address the aforementioned problems. For example, Chinese patent application CN119656434A discloses a "distal radial artery puncture auxiliary device," which, through an arm support, wrist support, hand support, and angle and orientation adjustment components, provides support for the arm and adjusts its angle, thereby improving puncture conditions to some extent.

[0004] However, clinical feedback has revealed several significant drawbacks in existing devices. For instance, the lack of hand support can easily lead to muscle tension. The existing devices primarily support the back of the hand and part of the palm's base, leaving the patient's palm suspended in the air. This non-physiological suspension posture easily causes involuntary muscle contraction and tension in the palm, which in turn pulls on and affects the position and tension of the distal radial artery. Furthermore, it can cause wobbling during puncture, increasing the uncertainty of the procedure.

[0005] The thumb separation structure is complex and unnatural. Existing devices typically use an independent thumb limiting block, which is adjusted and fixed through mechanisms such as locking blocks, locking strips, and telescopic rods. This structure is not only cumbersome to operate, requiring multiple adjustments based on individual patient differences, but its mechanical separation method fails to guide the hand into a natural, relaxed resting position, and the forced fixation may cause discomfort to the patient.

[0006] The device is not compatible with both left and right hands, limiting its clinical application. The design of the device in the reference document is specifically right-handed (or left-handed), with an overall asymmetrical shape, making it impossible to easily switch to the contralateral hand. This is extremely inconvenient in clinical practice, requiring medical institutions to equip themselves with both left and right hand braces, increasing procurement costs and management burden.

[0007] Therefore, there is a need in the field for a novel distal radial artery puncture brace that can provide full palm support, guide the hand into a natural position, quickly adapt to the left and right hands, and has a simpler structure and is easier to operate, so as to fundamentally overcome the shortcomings of the existing technology and further improve the puncture success rate and clinical operation efficiency. Utility Model Content

[0008] The purpose of this invention is to overcome the above-mentioned existing problems.

[0009] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is as follows: A distal radial artery arm puncture brace was designed, and the specific scheme is as follows: A distal radial artery arm puncture brace includes an arm support unit, which includes a posture adjustment part and an arm bearing part. The posture adjustment unit is used to fix the brace to the support and can adjust the height and horizontal angle of the arm bearing part; A palm positioning block, which is slidably mounted on the arm support section; The palm positioning block is provided with an inclined support surface and a thumb positioning groove, which are used to support the palm and keep the wrist joint dorsiflexed and the thumb abducted.

[0010] Furthermore, the palm positioning block is connected to the arm support via a sliding assembly that allows the palm positioning block to move and lock along the length of the arm support.

[0011] Furthermore, the palm positioning block has a conical structure, and its axis maintains an angle of 15-20 degrees with the upper surface of the arm bearing part.

[0012] Furthermore, the thumb positioning groove is an arc-shaped groove, and its extension direction forms an angle of 30-40 degrees with the axis of the palm positioning block.

[0013] Furthermore, the palm positioning block rotates relative to the arm support via a sliding assembly to accommodate left- or right-handed use.

[0014] Furthermore, the palm positioning block is connected to the arm support via a sliding assembly, the sliding assembly including: A chute is provided on the arm's support section; A slider is located at the bottom of the palm positioning block and engages with a sliding groove. The slider can slide along the groove and rotate around the slider to accommodate left- or right-handed use.

[0015] Furthermore, a restraint strap is provided on the palm positioning block.

[0016] The beneficial effects of this utility model are: 1. By using a sliding, locking palm positioning block in conjunction with an inclined support surface and a thumb positioning part, the patient's wrist dorsiflexion and thumb abduction angles can be controlled, allowing full exposure of the radial artery in the nasal cavity area. Combined with the flexible padding and restraint band of the arm support part, three-point stable fixation of the arm, wrist, and palm is achieved, effectively preventing limb displacement during the puncture process.

[0017] 2. The posture adjustment unit enables height adjustment and horizontal rotation, and the longitudinal sliding and left and right turning functions of the palm positioning block can be used to adapt to the physiological curvature and left and right hand operation needs of patients with different body types.

[0018] 3. The fixed sleeve connected by the horizontal pivot can achieve a 180° inverted flip, and in conjunction with the relative rotation of the movable sleeve, the arm support can be stored below the edge of the interventional operating table. This structure allows the invention to be completely hidden within the projection range of the table when not in use, without affecting the passage of medical equipment or the transfer of the interventional operating table, making it suitable for emergency scenarios with limited space. Attached Figure Description

[0019] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a top view of the structure of this utility model; Figure 4 A frontal view of the palm positioning block; Figure 5 A schematic diagram of the palm positioning block structure; Figure 6 This is a schematic diagram showing the exploded structure of the U-shaped clamp and the fixing sleeve.

[0020] The above figures include the following reference numerals: 1. Arm support; 10. Slide groove; 2. Palm positioning block; 20. Restraint strap; 21. Thumb positioning groove; 23. Sliding block; 3. U-shaped clamp; 31. Fixed sleeve; 32. Movable sleeve; 33. Positioning hole. Detailed Implementation

[0021] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments, not all embodiments.

[0022] In the description of this utility model, it should be understood that the terms "front", "rear", "left", "right", "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] refer to Figure 1-6This invention provides a distal radial artery arm puncture device, comprising an arm support unit, which consists of a posture adjustment part and an arm support part 1. The posture adjustment part is used to fix the device to the bed and can adjust the height and rotation direction of the arm support part 1 to adapt to different patient body shapes and puncture operation needs. The arm support part 1 is used to directly support the patient's arm and has symmetrically arranged grooves 10 along its length. A palm positioning block 2 is slidably mounted on the grooves 10. The palm positioning block 2 has a rounded conical structure, which allows the patient's palm to be placed at a slightly tilted angle with the fingers in a relaxed position. At the same time, the palm positioning block 2 is provided with a restraint strap 20 and a thumb positioning groove 21 to stabilize and fix the palm and abduct the thumb, thereby fully exposing the distal radial artery in the snuffbox area, facilitating stable puncture by the doctor.

[0024] In practice, the posture adjustment unit mainly includes a bed frame fixing assembly and a height adjustment assembly, which are connected in sequence to complete the adjustment of the height and rotation direction of the arm bearing unit 1.

[0025] In practice, the bed-fixing assembly is used to stably fix the entire brace to the edge of the interventional operating table. Its structure includes clamping bolts and anti-slip pads. The opening size of the U-shaped clamp 3 matches the thickness of the edge of a common interventional operating table and is generally designed to be adjustable, with an opening width ranging from 3-8 cm to accommodate different sizes of interventional operating tables. A threaded hole is provided on one side wall of the U-shaped clamp 3, through which the clamping bolt is threadedly connected to the U-shaped clamp 3. One end of the clamping bolt extends into the U-shaped clamp 3, and the other end is equipped with a knob for easy manual rotation by medical staff. An anti-slip pad is fixedly connected to the end of the clamping bolt extending into the U-shaped clamp 3. The anti-slip pad is made of rubber with anti-slip textures on its surface. When the clamping bolt is tightened, the anti-slip pad fits tightly against the edge of the interventional operating table, increasing friction and preventing the brace from slipping during use. The top of the other side wall of the U-shaped clamp 3 is fixedly connected to the height adjustment component. The connection method is welding or bolting. If bolting is used, corresponding bolt holes are opened at the connection points of the U-shaped clamp 3 and the height adjustment component, and high-strength bolts are used for fixing.

[0026] In practical implementation, the height adjustment component is used to adjust the height of the arm support 1 to accommodate the placement needs of different patients' arms and the puncture operation height of medical staff. This component adopts a sleeve-type rotatable structure, mainly including a fixed sleeve 31 and a movable sleeve 32. The lower end of the fixed sleeve 31 is connected to the U-shaped clamp 3 in the bed frame fixing assembly via a horizontal rotating shaft. A fixed bearing is mounted on the U-shaped clamp 3, and a vertical positioning hole is formed through the fixed bearing. An annular sleeve is fixed to the side wall of the fixed sleeve 31 and rotates in cooperation with the fixed bearing. A matching hole is formed on the annular sleeve corresponding to the positioning hole. In use, the angle of the fixed sleeve 31 is locked by inserting a pin into the positioning hole and the matching hole. After removing the pin, the fixed sleeve 31 can be rotated around the horizontal rotating shaft. Inserting the pin again completes the positioning of the new angle. This design allows the fixed sleeve 31 to have an inverted function.

[0027] The fixed sleeve 31 is generally inverted L-shaped, with a sleeve integrally formed at its horizontal end. The sleeve serves as the mating carrier for the movable sleeve 32 and has a hollow internal structure. The outer diameter of the movable sleeve 32 matches the inner diameter of the sleeve, ensuring that the movable sleeve 32 can slide smoothly along the axial direction of the sleeve. A locking bolt is installed through the side wall of the sleeve. One end of the locking bolt is equipped with an anti-slip rotating handle, and the other end is a smooth surface. By tightening the rotating handle, the bolt surface can be tightly abutted against the side wall of the movable sleeve 32, achieving a high lock of the movable sleeve 32. To unlock, the handle can be rotated in the opposite direction to release it.

[0028] When the support needs to be stored, first remove the positioning pin, rotate the fixed sleeve 31 around the horizontal axis to an inverted state, then loosen the locking bolt on the sleeve, and rotate the movable sleeve 32 so that its horizontal end faces the U-shaped clamp 3. At this time, the arm support 1 will turn synchronously with the movable sleeve 32 to the U-shaped clamp 3. Since the U-shaped clamp 3 is clamped to the side of the emergency bed, the arm support 1 can be completely inserted into the space under the bed after storage, avoiding the occupation of external space and not affecting the normal transport operation of the emergency bed.

[0029] In practical implementation, the arm support unit 1 is used to support the patient's arm, and its structure includes a support base, an arm pad, and a groove 10. The overall shape of the support base is a cuboid, with a length of 40-50cm, a width of 15-20cm, and a thickness of 5-8cm, which can meet the support needs of arms of different lengths.

[0030] The arm pad is placed on the upper surface of the support base to improve the patient's arm placement comfort and reduce the pressure caused by prolonged support. The arm pad is made of memory foam with a thickness of 3-5cm and is covered with a breathable, skin-friendly medical non-woven fabric cover. The non-woven fabric cover is removable and replaceable for easy cleaning and disinfection.

[0031] In practice, the slide grooves 10 are symmetrically arranged on both sides of the upper surface of the support base along its length. There are two slide grooves 10, and the cross-sectional shape of the slide grooves 10 is T-shaped or dovetail-shaped, which can prevent the palm positioning block 2 from falling off during sliding. The length of the slide groove 10 is 20-30cm, extending from the end of the support base near the patient's shoulder to the end near the wrist, so that the palm positioning block 2 can be flexibly adjusted according to the position of the patient's palm.

[0032] In practice, the palm positioning block 2 is a component that enables the palm to be tilted, the wrist to be raised and extended, and the thumb to be abducted. Its overall shape is a rounded cone shape and it is made of medical-grade silicone material with high hardness. It has a certain degree of support, as well as good flexibility and comfort, so as to avoid causing pressure damage to the patient's palm.

[0033] Preferably, the tapered structure of the palm positioning block 2 has the following specific dimensions: a bottom diameter of 10-12cm, a height of 5-7cm, and a hemispherical top with a radius of 2-3cm. The entire surface is rounded and free of sharp edges to prevent scratching the patient's skin. The tilt angle of the palm positioning block 2 is 15-20 degrees, meaning the angle between the axis of the palm positioning block 2 and the upper surface of the arm support part 1 is 15-20 degrees. This angle allows the patient's palm to rest in a slightly tilted position, while naturally elevating the wrist and maintaining moderate dorsiflexion. The dorsiflexion angle is 30-45 degrees, which precisely meets the wrist joint posture requirements during distal radial artery puncture (the above angles and dimensions can be adjusted to different specifications and shapes according to actual needs to suit people of different body types).

[0034] The bottom of the palm positioning block 2 is provided with a sliding block that matches the slide groove 10 of the arm support part 1. The cross-sectional shape of the sliding block is T-shaped or dovetail-shaped, which is complementary to the cross-sectional shape of the slide groove 10. The sliding block can be embedded in the slide groove 10 and slide along the slide groove 10. In order to achieve the positioning of the palm positioning block 2 in the slide groove 10, a locking knob is provided on the sliding block. The locking knob is threadedly connected to the sliding block, and its end can abut against the bottom of the slide groove 10. After the palm positioning block 2 is adjusted to a suitable position, tightening the locking knob can fix the palm positioning block 2 on the slide groove 10 and prevent it from moving during puncture.

[0035] A restraint strap 20 is provided on the upper surface of the palm positioning block 2. The restraint strap 20 is used to fix the patient's palm to the palm positioning block 2 to ensure the stability of the palm. The restraint strap 20 is made of elastic medical bandage, which has good elasticity and breathability. One end of the restraint strap 20 is fixedly connected to one side of the palm positioning block 2 by a buckle, and the other end is wrapped around the palm and connected to the other side of the palm positioning block 2 by another buckle, which facilitates quick fixation and removal. There are two restraint straps 20, one in the middle of the palm positioning block 2 and the other near the fingers. The restraint strap 20 in the middle is used to fix the base of the palm, and the restraint strap 20 near the fingers is used to fix the middle of the palm. The two restraint straps 20 work together to ensure the stability of the palm fixation, while avoiding excessive restraint that may affect blood circulation.

[0036] The palm positioning block 2 has a thumb positioning groove 21 at its top. This groove accommodates the patient's thumb, allowing it to be positioned within the groove on the other side, thus achieving thumb abduction. The thumb positioning groove 21 is shaped to conform to the physiological curve of the thumb, forming an arc-shaped groove structure. The groove is 2-3 cm deep, 2-2.5 cm wide, and 5-6 cm long. The angle between the axis of the thumb positioning groove 21 and the axis of the palm positioning block 2 is 30-40 degrees. This angle allows for full thumb abduction, preventing the thumb from obstructing the nasal cavity area and ensuring full exposure of the distal radial artery located in the nasal cavity area, facilitating puncture procedures. The inner wall of the thumb positioning groove 21 is also lined with a soft silicone pad to improve thumb comfort.

[0037] In practical operation, the process of using the distal radial artery arm puncture brace provided by this utility model is as follows: First, assist the patient to assume a comfortable position, generally a supine or semi-recumbent position, with the arm to be punctured naturally extended and the palm facing upward. Place the patient's arm on the arm pad of the arm support part 1, so that the physiological curve of the arm conforms to the structure of the arm pad, the length direction of the arm is consistent with the length direction of the arm support part 1, the elbow is naturally bent, the shoulder is relaxed, and the arm restraint strap 20 is used to wrap and fix it.

[0038] Next, loosen the locking knob at the bottom of the palm positioning block 2. Slide the palm positioning block 2 along the groove 10 of the arm support section 1, according to the position of the patient's hand, so that the palm positioning block 2 is positioned below the patient's wrist. Place the patient's hand on the conical surface of the palm positioning block 2, with the hand at a 15-20 degree angle, the wrist naturally elevated, maintaining a 30-45 degree dorsiflexion. Then, wrap the patient's thumb around the top of the palm positioning block 2 and insert it into the thumb positioning groove 21, abducting the thumb 30-40 degrees to fully expose the distal radial artery in the snuffbox area. After adjusting the position of the hand, tighten the locking knob at the bottom of the palm positioning block 2 to fix its position. Next, wrap the two restraint straps 20 on the palm positioning block 2 around the base and middle of the patient's hand, respectively, and secure the restraint straps 20 with Velcro or buckles before puncture.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A distal radial artery arm puncture brace, comprising an arm support unit, characterized in that, An arm support unit, comprising a posture adjustment unit and an arm bearing unit (1). The posture adjustment unit is used to fix the brace to the support and can adjust the height and horizontal angle of the arm bearing unit (1); Palm positioning block (2), which is slidably disposed on the arm bearing part (1); The palm positioning block (2) is provided with an inclined support surface and a thumb positioning groove (21) to support the palm and keep the wrist joint dorsiflexed and the thumb abducted.

2. The distal radial artery arm puncture brace according to claim 1, characterized in that, The palm positioning block (2) is connected to the arm support part (1) via a sliding component, which enables the palm positioning block (2) to move and lock along the length direction of the arm support part (1).

3. The distal radial artery arm puncture brace according to claim 1, characterized in that, The palm positioning block (2) has a conical structure, and its axis is at an angle of 15-20 degrees with the upper surface of the arm bearing part (1).

4. The distal radial artery arm puncture brace according to claim 1, characterized in that, The thumb positioning groove (21) is an arc-shaped groove, and its extension direction forms an angle of 30-40 degrees with the axis of the palm positioning block (2).

5. A distal radial artery arm puncture brace according to claim 2, characterized in that, The palm positioning block (2) rotates relative to the arm support (1) via a sliding component to accommodate left or right hand use.

6. The distal radial artery arm puncture brace according to claim 5, characterized in that, The palm positioning block (2) is connected to the arm support (1) via a sliding assembly, the sliding assembly including: A chute (10) is provided on the arm support part (1); The slider (23) is located at the bottom of the palm positioning block (2) and cooperates with the slide groove (10); The slider (23) can slide along the groove (10) and rotate around the slider (23) to accommodate left-hand or right-hand use.

7. The distal radial artery arm puncture brace according to claim 1, characterized in that, A restraint strap (20) is provided on the palm positioning block (2).

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