Distal radial artery hemostat

Abstract

A far-end radial artery hemostat comprises a wrist strap capable of being wound around the peripheral side of a wrist, a compression plate is arranged on the wrist strap, a compression air bag is arranged on the side, facing an affected part, of the compression plate, an air conveying pipe communicated with the compression air bag is arranged on the side, back to the affected part, of the compression plate, and an adjusting assembly is arranged in the air conveying pipe. The adjusting assembly is used for inputting air pressure into the compression air bag and adjusting the air pressure in the compression air bag in a rotating mode. The hemostat has the advantages that by arranging the rotary adjusting assembly, a patient can autonomously control the pressure value in the compression air bag through simple rotary operation, the defect that a traditional hemostat needs to be frequently adjusted by medical staff is overcome, and the accuracy and controllability of pressure adjustment are guaranteed.

Description

Technical Field

[0001] The present invention relates to a medical device, and more particularly to a distal radial artery hemostat. Background Art

[0002] In the field of cardiovascular interventional diagnosis and treatment, percutaneous access through the distal radial artery has become the mainstream procedure, and the corresponding hemostatic device needs to meet the dual requirements of precise compression and comfortable experience. Existing distal radial artery hemostats usually consist of an adjustable wristband, a transparent compression plate, an inflatable balloon, and a one-way valve for preventing the gas inside the inflatable balloon from flowing out. During clinical application, medical staff first locate the puncture point, align the center of the balloon with the hemostatic site, fix the wristband with Velcro, and then use a syringe to inject a fixed amount of gas into the balloon. The directional compression of the vascular puncture point is achieved through air pressure conduction. After the operation, it is necessary to continuously observe for 2 - 4 hours, during which staged stepwise decompression is carried out. After confirming that the hemostatic effect is stable, the device is removed. Compared with the traditional manual compression method, this technology has the advantages of high standardization and liberation of medical staff's hands, and is widely used in the postoperative care scenarios in catheterization laboratories and wards.

[0003] However, the existing technology has significant limitations: after a fixed pressure value is applied to the patient, the patient completely loses the right to adjust independently. Due to individual tolerance differences and the dynamic changes of postoperative tissue edema, the preset pressure often results in extreme situations of insufficient or excessive compression. When the patient experiences discomfort such as hand numbness and increased pain, it is necessary to wait for the medical staff to respond before the pressure can be adjusted. This not only delays the treatment time and increases the risk of complications such as subcutaneous hematoma and venous return obstruction, but also increases the workload of nursing staff. Especially during the night nursing period, cases of limb ischemia caused by the inability to obtain professional adjustment in a timely manner are common, seriously restricting the patient's postoperative recovery experience and the level of medical safety. Summary of the Invention

[0004] In view of the deficiencies of the existing technology, the present invention provides a distal radial artery hemostat that enables the patient to independently adjust the air pressure of the internal compression balloon.

[0005] To achieve the above object, the technical solution of the present invention is as follows: A distal radial artery hemostat includes a wristband that can be wound around the circumference of the wrist. A compression plate is provided on the wristband. A compression balloon is provided on the side of the compression plate facing the affected part. An air delivery pipe communicating with the compression balloon is provided on the side of the compression plate facing away from the affected part. An adjustment assembly is provided in the air delivery pipe. The adjustment assembly is used to input air pressure into the compression balloon and adjust the internal air pressure of the compression balloon by rotation.

[0006] The beneficial effects of the present invention are as follows: Through the setting of the rotary adjustment component, the patient can independently control the pressure value in the compression airbag through a simple rotation operation, which not only avoids the drawbacks of the traditional hemostat that requires frequent adjustment by medical staff, but also ensures the accuracy and controllability of pressure adjustment. The rotary adjustment method is less likely to cause accidental touch operations compared to the pressing or sliding structures, and the pressure control is achieved through mechanical transmission, with higher reliability. As a preferred method, the adjustment component can adopt a knob mechanism with a screw propulsion structure. When the patient rotates the handle, the internal sealing structure is axially pushed through the cooperation of the thread pair, thereby changing the volume of the sealed cavity. This mechanical transmission method can effectively convert the rotation angle into a linear displacement, ensuring the linearity and repeated accuracy of pressure adjustment. In addition, the torque feedback of the rotation operation can provide tactile perception for the patient to avoid over-adjustment. As another preferred method, scale lines and marking lines are respectively set on the rotary handle and the air delivery pipe. After calculation, pressure numbers are marked on the scale lines for use in conjunction with the marking lines, facilitating subsequent monitoring of the pressure magnitude.

[0007] Further, the adjustment component includes a rotating column and a sealing piece. The rotating column is screwed into the air delivery pipe. One end of the rotating column is a rotary handle for the patient to operate, and a sealed space is formed between the other end and the sealing piece. When the rotating column rotates, the volume of the sealed space is changed to enable gas to flow into or out of the compression airbag through the sealing piece.

[0008] In this solution, the rotating column and the sealing piece are linked through thread cooperation, converting the rotational motion into a change in the volume of the sealed space to achieve the control of the directional flow of gas. The spiral structure of the rotating column can convert a large-angle rotation into a small displacement, making the pressure adjustment more precise. The change in the volume of the sealed space forms a proportional relationship with the rotation angle, facilitating the patient to master the adjustment amount. As a preferred method, the rotating column can adopt a multi-start thread structure, and each rotation corresponds to an axial displacement of multiple pitches, which not only ensures the adjustment sensitivity but also avoids an overly long operation stroke. The sealing piece can be designed as a floating structure with a guiding groove, and when sliding axially under the push of the rotating column, it maintains a sealed contact with the inner wall of the air delivery pipe to prevent gas leakage.

[0009] Further, the other end of the rotating column relative to the rotary handle is a sealed end face, which forms a seal with the inner diameter of the air delivery pipe. The adjustment component further includes a rotating piece abutted against the sealing piece and a connecting rod for connecting the sealed end face and the rotating piece. The sealed space is located between the sealed end face and the rotating piece. Relative rotation can occur between the rotating piece and the sealing piece. First air holes and second air holes are respectively provided on the rotating piece and the sealing piece. The first air hole and the second air hole can communicate the compression airbag and the sealed space when relative rotation occurs between the rotating piece and the sealing piece.

[0010] Through the cooperation of the split rotating piece and the sealing piece, the structure realizes the decoupling of rotation adjustment and air flow control. When the rotating piece rotates, the relative position of the air passing holes on it and the air passing holes of the sealing piece changes, forming a variable air flow channel. The rigid connection of the connecting rod ensures the synchronous movement of the sealing end face and the rotating piece, while the sealing piece remains stationary. As a preferred method, the rotating piece can adopt a structure with involute-shaped air passing holes. When rotating relatively, the overlapping area of the air passing holes changes linearly, realizing a progressive adjustment of the air pressure. The second air passing holes of the sealing piece can be designed in a fan-shaped array arrangement, and cooperate with the circular holes of the rotating piece to form multiple adjustment gears, improving the accuracy of pressure control.

[0011] Further, two limit bumps are symmetrically arranged at both ends of the outer peripheral surface of the sealing piece, and limit grooves corresponding to the limit bumps are arranged in the air delivery pipe. The limit bumps and the limit grooves cooperate to prevent the sealing piece from moving circumferentially.

[0012] This limit structure effectively solves the problem of possible circumferential displacement of the sealing piece during rotation adjustment. The cooperation of the limit bumps and the limit grooves restricts the rotational freedom, ensuring that the sealing piece is fixed in the air delivery pipe without moving. As a preferred method, the limit groove can adopt a dovetail groove structure, and its trapezoidal cross-section cooperates with the wedge-shaped structure of the limit bump, having a self-locking function when bearing an axial load, preventing the sealing piece from generating displacement deviation under the action of air pressure. A polytetrafluoroethylene coating can be provided on the surface of the limit bump to reduce the sliding friction coefficient and ensure smooth adjustment.

[0013] Further, the connecting rod includes a fixing part and a sleeving part. A slot for inserting the fixing part is provided on the sleeving part, and an elastic member with both ends fixed to the fixing part and the sleeving part respectively is arranged between the fixing part and the sleeving part.

[0014] The above setting enables the volume of the sealed space to change when the rotating handle rotates, and then be converted into a pressure change. As a preferred method, the elastic member can adopt a corrugated spring sheet structure, and its non-linear stiffness characteristic can provide a smaller resistance in the initial stage for easy adjustment, and increase the stiffness near the limit position to prevent overshoot.

[0015] Further, the connecting parts of the connecting rod fixed to the sealing end face and the rotating piece are both arc-shaped and fixed on the outer peripheral surfaces of the sealing end face and the rotating piece.

[0016] The arc connection structure optimizes the utilization rate of the sealing space and enhances the structural rigidity at the same time. The arc transition can avoid stress concentration at the right-angle connection and improve the fatigue life of the connecting rod. As a preferred method, the connecting rod can adopt a hollow airfoil section to reduce the overall weight while ensuring strength. The position of the arc fixing point is set at the 120° equally divided points on the same outer peripheral surface of the rotating piece and the sealing end face, forming a stable three-point support structure to ensure the coaxiality of the movement of the rotating piece and the sealing end face.

[0017] Furthermore, the inner diameter of the gas pipeline where the sealing piece is installed is smaller than the inner diameter of the part of the gas pipeline that cooperates with the rotating column.

[0018] This size difference design forms a stepped pressure chamber structure, which is conducive to establishing a stable pressure gradient. Thus, an obvious air flow throttling effect is formed to facilitate the adjustment of the air pressure inside the compression airbag.

[0019] Furthermore, the adjustment assembly further includes a display member, which is used to show from inside the adjustment assembly after the adjustment assembly rotates.

[0020] The design of the display device realizes the visual monitoring of the operation traces, which is convenient for medical staff to quickly identify whether the patient has made self-adjustment. As a preferred method, the display member can adopt a mechanical indicating sign structure. When the rotating handle rotates, the sign is driven to extend from the hidden groove through gear transmission. A fluorescent coating can be set on the surface of the sign, which can still be clearly identified during night inspections. Another implementation is to set a magnetic sensitive element in the rotating column, and when the rotation angle exceeds the set threshold, the warning sign of the electronic display screen is triggered.

[0021] Furthermore, it further includes a warning channel for the display member to enter. The display member is a warning pigment, and the rotating handle drives the warning pigment into the warning channel after rotation.

[0022] This solution realizes an irreversible warning mark through a physical color display mechanism. The destructive design of the pigment storage device ensures that a permanent record will be left once adjusted. As a preferred method, a porous adsorption material layer can be set in the warning channel. When the pigment breaks through the film, it is quickly adsorbed and fixed to prevent the pigment from spreading and polluting. The storage bump adopts a transparent observation window design to facilitate checking the pigment stock. The pigment formula can select a photochromic material, which presents an obvious color change under the irradiation of a specific wavelength light source to enhance the warning effect.

[0023] Further, a groove is provided on the outer peripheral surface of the rotary handle. The warning track is fixed to the air delivery pipe, and a storage bump and a display track located outside the rotary handle are provided thereon corresponding to the groove. The display member is located within the storage bump. A film that will rupture under pressure is provided between the storage bump and the display track. When the rotary handle rotates, it squeezes the storage bump so that the display member breaks through the film and enters the display track located outside the rotary handle.

[0024] This mechanical linkage structure ensures the precise correspondence between the rotation operation and the warning mark. The rupture threshold of the film is precisely calculated and the display is triggered only when an effective adjustment action occurs. As a preferred method, the storage bump can adopt a conical liquid storage cavity design, with its tip pointing to the weakest part of the film, ensuring precise film rupture under the tangential force of the rotary handle. Capillary diversion grooves are provided in the display track to guide the uniform diffusion of the pigment using the siphon effect. The film material is selected as a polyimide composite layer, which has a definite rupture strength and chemical stability. Description of the Drawings

[0025] Figure 1 is the disassembly diagram of the embodiment of the present invention; Figure 2 is the cross-sectional view of the sealed space of the embodiment of the present invention; Figure 3 is the cross-sectional view of the connecting column of the embodiment of the present invention; Figure 4 is the partial enlarged view of the warning track of the embodiment of the present invention; Figure 5 is the cross-sectional view of the warning track of the embodiment of the present invention; Figure 6 is the usage state diagram of the embodiment of the present invention. Detailed Embodiment

[0026] An embodiment of a distal radial artery hemostat of the present invention is as Figures 1-6 shown: It includes a wristband 1 that can be wound around the outer periphery of the wrist, and a compression plate 2 is provided on its inner side. A compression airbag 21 is fixedly installed on the side of the compression plate 2 facing the skin, and an air delivery pipe 3 is provided on the side facing away from the skin. An adjustment component 4 is also installed inside the air delivery pipe 3. The adjustment component 4 includes a rotary column 41 screwed inside the air delivery pipe 3. A rotary handle 411 for the patient to operate is provided at the top of the rotary column 41, and a sealed end face 412 is formed at the bottom. The sealed end face 412 is connected to a rotating piece 414 through an arc-shaped connecting rod 413. A sealing piece 42 with a second air passing hole 421 is provided below the rotating piece 414. A first air passing hole 415 that cooperates with the second air passing hole 421 is provided on the surface of the rotating piece 414. An adjustable volume sealed space 416 is formed between the sealed end face 412 and the rotating piece 414.

[0027] The connecting rod 413 includes a fixing portion 4131 and a sleeving portion 4132. A slot 4133 for inserting the fixing portion 4131 is provided on the end face of the sleeving portion 4132 facing the fixing portion 4131. An elastic member 4134 with both ends fixed to the fixing portion 4131 and the sleeving portion 4132 respectively is provided between the fixing portion 4131 and the sleeving portion 4132.

[0028] A limiting groove 31 for accommodating the sealing piece 42 is provided in the air delivery pipe 3. Symmetrically arranged limiting bumps 422 that cooperate with the limiting groove 31 are provided on the outer circumference of the sealing piece 42. The inner diameter of the air delivery pipe 3 where the sealing piece 42 is installed is smaller than the inner diameter of the section of the air delivery pipe 3 that cooperates with the rotating column 41.

[0029] The adjusting assembly 4 further includes a warning track 46. The warning track 46 is fixed to the outside of the air delivery pipe 3 and corresponds to the outer peripheral groove 4112 of the rotating handle 411. Storage bumps 462 are provided in the groove 4112. A display piece 45 whose content is warning pigment is encapsulated in the storage bumps 462. It is isolated from the warning track 46 by a breakable film 463. A display track 464 connected to the warning track 46 is provided on the surface of the air delivery pipe 3.

[0030] An air nozzle 4111 for injecting gas into the compression airbag 21 by a syringe (not shown in the figure) is provided on the rotating handle 411. A sealing cover (not shown in the figure) is naturally provided on the air nozzle 4111 or a one-way valve (not shown in the figure) is provided in the air nozzle 4111 to prevent gas from flowing out.

[0031] The working principle is as follows: Medical staff inject gas into the compression airbag 21 from the air nozzle 4111 and seal the air nozzle 4111 after the injection to prevent gas from flowing out. When the patient rotates the rotating handle 411, while the rotating column 41 drives the rotating piece 414 to move circumferentially, due to the change in the axial length of the connecting rod 413, the volume of the sealing space 416 changes to form a pressure difference. When the first air hole 415 of the rotating piece 414 is not connected to the second air hole 421, the rotating piece 414 and the sealing piece 42 are misaligned to seal the air path; when the two air holes are connected, the pressure difference in the sealing space 416 enters the compression airbag 21 to balance the pressures of the two. The limiting bumps 431 cooperate with the limiting groove 312 to prevent the sealing piece 42 from rotating. When adjusting the pressure, the handle 411 rotates to squeeze the storage bumps 462, and the display piece 45 whose content is warning pigment breaks through the film 463 and enters the display track 464 to form a visible mark.

[0032] The above embodiments are only one of the preferred specific embodiments of the present invention. Ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. A distal radial artery hemostat, comprising a wristband that can be wound around the wrist circumference, a compression plate is arranged on the wristband, a compression airbag is arranged on one side of the compression plate facing the affected part, and an air delivery pipe communicating with the compression airbag is arranged on the side of the compression plate facing away from the affected part, and it is characterized in that: An adjusting component is arranged inside the gas transmission pipe, and the adjusting component is used to input air pressure into the compression airbag and adjust the internal air pressure of the compression airbag by rotating.

2. The distal radial artery hemostat according to claim 1, wherein: The adjusting component includes a rotating column and a sealing piece. The rotating column is screwed inside the gas transmission pipe. One end of the rotating column is a rotating handle for the patient to operate, and a sealing space is formed between the other end and the sealing piece. When the rotating column rotates, the volume of the sealing space is changed to enable gas to flow into or out of the compression airbag through the sealing piece.

3. The distal radial artery hemostat according to claim 2, wherein: The other end of the rotating column relative to the rotating handle is a sealing end face, and a seal is formed between the sealing end face and the inner diameter of the gas transmission pipe. The adjusting component further includes a rotating piece abutted against the sealing piece and a connecting rod for connecting the sealing end face and the rotating piece. The sealing space is located between the sealing end face and the rotating piece. Relative rotation can occur between the rotating piece and the sealing piece. A first air passing hole and a second air passing hole are respectively arranged on the rotating piece and the sealing piece. The first air passing hole and the second air passing hole can communicate the compression airbag and the sealing space when the rotating piece and the sealing piece rotate relatively.

4. The distal radial artery hemostat according to claim 3, characterized in that: Limit bumps are symmetrically arranged at both ends of the outer peripheral surface of the sealing piece. Limit grooves are correspondingly arranged inside the gas transmission pipe for the limit bumps. The limit bumps and the limit grooves cooperate to prevent the sealing piece from moving circumferentially.

5. The distal radial artery hemostat according to claim 3, wherein: The connecting rod includes a fixing part and a sleeving part. A slot for inserting the fixing part is arranged on the sleeving part. An elastic part with both ends fixed to the fixing part and the sleeving part respectively is arranged between the fixing part and the sleeving part.

6. The distal radial artery hemostat according to claim 2, wherein: The connecting parts of the connecting rod fixed to the sealing end face and the rotating piece are both arc-shaped and fixed on the outer peripheral surfaces of the sealing end face and the rotating piece.

7. The distal radial artery hemostat according to claim 3, wherein: The inner diameter of the gas transmission pipe where the sealing piece is installed is smaller than the inner diameter of the part of the gas transmission pipe that cooperates with the rotating column.

8. The distal radial artery hemostat according to claim 1, characterized in that: The adjusting component further includes a display piece, and the display piece is used to show from inside the adjusting component after the adjusting component rotates.

9. The distal radial artery hemostat according to claim 7, wherein: A warning channel for the display piece to enter is further included. The display piece is warning pigment. After the rotating handle rotates, it drives the warning pigment into the warning channel.

10. The distal radial artery hemostat according to claim 8, characterized in that: A groove is arranged on the outer peripheral surface of the rotating handle. The warning channel is fixed to the gas transmission pipe, and a storage bump and a display channel located outside the rotating handle are correspondingly arranged on the warning channel for the groove. The display piece is located inside the storage bump. A film that will break when pressed is arranged between the storage bump and the display channel. When the rotating handle rotates, it squeezes the storage bump to enable the display piece to break through the film and enter the display channel located outside the rotating handle.

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