Hemostat for radial artery

Abstract

The invention relates to the technical field of medical instruments, in particular to a radial artery hemostat which comprises a hemostasis unit and a control unit, the hemostasis unit comprises a fixing module and a compression module, the fixing module is used for being worn on a limb, the compression module is arranged on the fixing module, and the compression module is used for compressing a puncture point; the control unit comprises a control module, a pressure applying module and a photoelectric sensor module, the pressure applying module and the photoelectric sensor module are arranged in the control module, when the control module is detachably connected to the fixing module, the pressure applying module is connected with the compression module, and the photoelectric sensor module is used for detecting the blood flow state of the puncture point; the control module is used for controlling the pressing module to work so as to accurately adjust the pressure applied to the puncture point by the pressing module. The pressure adjusting device has the effect of accurately adjusting the pressure.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and in particular to a hemostat for the radial artery. Background Technology

[0002] Currently, transradial coronary intervention (TRI) has become a routine approach in cardiovascular interventional diagnosis and treatment. Effective compression of the puncture site post-procedure is crucial to preventing complications such as bleeding and hematoma. Therefore, various radial artery compression hemostatic devices are used clinically. A relevant reference is Chinese Patent Publication No. CN219516419U, which discloses a radial artery hemostatic device comprising a pressure plate fixed by an elastic band and a screw mechanism driven by a rotating handle to move the pressure block downwards, thereby applying mechanical pressure to the radial artery puncture site. The user adjusts the pressure by rotating the handle to achieve hemostasis.

[0003] Regarding the aforementioned techniques: pressure is applied by rotating a handle, but it's impossible to know whether the applied pressure is appropriate. Insufficient pressure may fail to effectively stop bleeding, leading to oozing or hematoma; excessive pressure may completely block radial artery blood flow, or even compress nerves, causing distal limb ischemia or patient discomfort. Therefore, there is a problem with precisely adjusting the pressure. Summary of the Invention

[0004] To precisely adjust the pressure, this application provides a hemostat for the radial artery.

[0005] This application provides a radial artery hemostat, which adopts the following technical solution: A hemostat for radial artery, comprising: The hemostasis unit includes a fixation module and a compression module. The fixation module is used to be worn on the limb, and the compression module is disposed on the fixation module and is used to compress the puncture point. The control unit includes a control module, a pressure application module, and a photoelectric sensor module. The pressure application module and the photoelectric sensor module are respectively disposed within the control module. When the control module is detachably connected to the fixed module, the pressure application module is connected to the compression module. The photoelectric sensor module is used to detect the blood flow status at the puncture point. The control module is used to control the operation of the pressure application module to precisely adjust the pressure applied to the puncture point by the compression module.

[0006] By adopting the above technical solution, the fixation module can be worn on the limb, providing stable support for the compression module, which then applies pressure to the puncture site. The pressure application module and photoelectric sensor module are housed within the control module. When the control module and fixation module are detachably connected, the pressure application module connects to the compression module, providing pressure to it. Simultaneously, the photoelectric sensor module detects the blood flow status at the puncture site. The control module controls the operation of the pressure application module based on the detected blood flow status, thereby precisely adjusting the pressure applied by the compression module to the puncture site. This achieves precise control of hemostasis at the radial artery puncture site, improving hemostasis effectiveness and ease of use.

[0007] Optionally, the fixing module includes a base and a wristband, the wristband being connected to the base. The compression module includes an airbag and a one-way interface, the airbag and the one-way interface being respectively disposed on the base. The airbag is located on the side of the base near the wristband. One end of the one-way interface is connected to the airbag, and the other end of the one-way interface is connected to the pressure application module. The control module is detachably connected to the base.

[0008] By adopting the above technical solution, the wristband and base are connected so that the fixing module can be worn on the limb. The airbag can be used as a component to compress the puncture point. One end of the one-way interface is connected to the airbag and the other end can be connected to the pressure application module. When the control module is detachably connected to the base, the pressure application module can inflate or deflate the airbag through the one-way interface, thereby adjusting the pressure applied by the airbag to the puncture point and realizing the function of compression hemostasis at the puncture point. Furthermore, the detachable connection between the control module and the base facilitates the installation, disassembly, and maintenance of the hemostat.

[0009] Optionally, the pressure application module includes a micro air pump and a probe tube. The micro air pump is disposed on the control module, and the probe tube is disposed on the control module and extends away from the control module. One end of the probe tube is connected to the micro air pump, and the other end of the probe tube can pass through the one-way interface and communicate with the airbag.

[0010] By adopting the above technical solution, a miniature air pump is installed on the control module. The probe tube is connected to the miniature air pump and can also pass through a one-way interface to connect with the airbag. This allows the gas generated by the miniature air pump to be delivered to the airbag through the probe tube, enabling the airbag to inflate and apply pressure to the puncture site, thus achieving hemostasis. Furthermore, when the probe tube is detached from the one-way interface, the one-way interface can seal the airbag, thereby preventing air leakage and helping to ensure the stability of the hemostatic effect.

[0011] Optionally, a light-transmitting film is provided at the center of the bottom wall of the airbag, and the tube wall of the probe tube forms an optical waveguide connected to the photoelectric sensor module. The light transmitted by the optical waveguide can pass through the light-transmitting film to irradiate the patient's skin.

[0012] By adopting the above technical solution, a light-transmitting film is set in the center of the bottom wall of the airbag, and the tube wall of the probe tube forms an optical waveguide connected to the photoelectric sensor module. This allows the light emitted by the photoelectric sensor module to be transmitted through the optical waveguide, and the light-transmitting film does not block the light. The light transmitted through the optical waveguide can pass smoothly through the light-transmitting film to irradiate the patient's skin, thereby helping to avoid the base from blocking and interfering with the light signal, and thus making it easier for the photoelectric sensor module to more accurately detect the blood flow status at the puncture point.

[0013] Optionally, the sidewall thickness of the airbag is greater than its bottom wall thickness.

[0014] By adopting the above technical solution, the sidewall thickness of the airbag is greater than the bottom wall thickness. When the airbag is inflated, the anisotropic design of thick sidewall and thin bottom wall prevents the airbag from forming a spherical bulge. Instead, it expands preferentially to the bottom, forming a more effective local compression.

[0015] Optionally, C-shaped reinforcing ribs are pre-embedded in the sidewall of the airbag.

[0016] By adopting the above technical solution, the restraining effect of the C-shaped reinforcing ribs causes the sidewalls of the airbag to not only expand downwards but also contract inwards when inflated, generating a "clamping" encircling force. This force helps the airbag to automatically align and stabilize at the most prominent point of the radial artery pulsation, effectively preventing lateral slippage and ensuring that the compression point is always correct, thus solving the problem of easy displacement of the compression point in existing technologies.

[0017] Optionally, a snap-fit ​​unit is provided between the base and the control module, and the control module is connected to the base through the snap-fit ​​unit.

[0018] By adopting the above technical solution, the control module and the base can be detachably connected using the snap-fit ​​unit, which facilitates the installation and removal of the hemostat, and makes it convenient to use and maintain.

[0019] Optionally, the base has a slot, and the snap-fit ​​unit includes an arched elastic element and an elastic hook. Each end of the arched elastic element is provided with a slide block. The slide block is slidably disposed on the base and connected to the wristband. The elastic hook is disposed on the control module. When the control module is pressed down and installed on the base, the elastic hook is inserted into the slot and snaps into the inner wall of the slot. At the same time, the control module presses down the arched elastic element.

[0020] By adopting the above technical solution, when the control module is pressed down and installed on the base, the elastic hook is inserted into the slot and engages with the inner wall of the slot, realizing a detachable connection between the control module and the base and ensuring the stability of the connection. Simultaneously, because the sliding seats at both ends of the arched elastic element are slidably mounted on the base and connected to the wristband, the arched elastic element is flattened during the pressing process of the control module. The sliding seats slide on the base, pulling the wristband, thereby shortening the effective circumference of the wristband, eliminating wearing gaps, and allowing the fixing module to be worn more tightly on the limb, ensuring the compression effect of the compression module on the puncture point.

[0021] Optionally, the bottom of the control module is provided with a groove, and the arched elastic element is inserted into the groove and contacts the inner wall of the groove.

[0022] By adopting the above technical solution, a groove is opened at the bottom of the control module. When the control module is pressed down and installed on the base, the arched elastic element is inserted into the groove and contacts the inner wall of the groove. This design ensures that during the snap-fit ​​process, the arched elastic element can be accurately installed into the appropriate position by the control module, and the inner wall of the groove contacts the arched elastic element, resulting in a good fit between the two, enhancing the stability of the connection between the control module and the base. It also ensures that the arched elastic element can be flattened according to the preset method, thereby driving the slide to slide and adjust the effective circumference of the wristband, eliminating wearing gaps.

[0023] Optionally, two arched elastic elements are provided, which are parallel to each other and spaced apart. Two limiting blocks are spaced apart on the base. The two arched elastic elements are located between the two limiting blocks, and the opposite sides of the two arched elastic elements abut against the limiting blocks.

[0024] By adopting the above technical solution, two parallel and spaced arched elastic elements and two limiting blocks are set up. This ensures that the two arched elastic elements are positioned between the two limiting blocks, and that the opposite sides of the two arched elastic elements abut against the limiting blocks. When the control module is pressed down and installed on the base, it ensures that the arched elastic elements are stably flattened, thereby preventing the arched elastic elements from shifting or shaking under pressure. This guarantees the stability and reliability of the snap-fit ​​unit, and further strengthens the connection between the control module and the base.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. It achieves automated and precise pressure regulation, and combined with photoelectric sensor closed-loop control, it avoids errors caused by manual operation; 2. The probe tube is both an inflation tube and an optical fiber, completely eliminating the obstruction and interference of the base on the optical signal, and can accurately detect the blood flow status at the puncture point. 3. The anisotropic airbag design with reinforcing ribs generates a wrapping force when inflated, effectively preventing the airbag from slipping and making the positioning more accurate; 4. While installing the control module, the deformation of the arched elastic element automatically tightens the wristband, eliminating any misalignment during wear and improving operational efficiency and patient comfort. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a radial artery hemostat according to Embodiment 1 of this application.

[0027] Figure 2 This is a side view of a radial artery hemostat according to Embodiment 1 of this application.

[0028] Figure 3 It is along Figure 2 A partial structural cross-sectional view of line AA in the middle.

[0029] Figure 4 This is a schematic diagram of the overall structure of a radial artery hemostat according to Embodiment 2 of this application.

[0030] Figure 5 This is a cross-sectional view of a radial artery hemostat according to Embodiment 2 of this application.

[0031] Figure 6 This is a partial structural schematic diagram of the hemostasis unit and the snap-fit ​​unit in Embodiment 2 of this application.

[0032] Explanation of reference numerals in the attached figures: 1. Hemostasis unit; 11. Fixing module; 111. Base; 1111. Slot; 1112. Limiting block; 112. Wristband; 12. Compression module; 121. Airbag; 1211. C-shaped reinforcing rib; 1212. Transparent film; 122. One-way interface; 2. Control unit; 21. Control module; 211. Housing; 2111. Vent; 2112. Groove; 212. Controller; 22. Pressure application module; 221. Miniature air pump; 222. Probe tube; 23. Photoelectric sensor module; 3. Snap-fit ​​unit; 31. Arched elastic element; 32. Elastic hook; 33. Slide. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0034] This application discloses a hemostat for the radial artery.

[0035] It should be noted that, in the description of this invention, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "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 invention 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 invention.

[0036] Example 1: Refer to Figure 1 A hemostatic device for radial artery includes a hemostatic unit 1 and a control unit 2. The hemostatic unit 1 is worn on the limb and presses the puncture point. The control unit 2 is detachably connected to the hemostatic unit 1. The control unit 2 can control the pressure applied to the hemostatic unit 1 and detect the blood flow status at the puncture point, thereby achieving the beneficial effect of precisely adjusting the pressure applied by the hemostatic unit 1 to the puncture point and improving the hemostatic effect.

[0037] Reference Figure 2 and Figure 3 The hemostasis unit 1 includes a fixation module 11 and a compression module 12. The fixation module 11 is worn on the patient's wrist (limb), and the compression module 12 is set on the fixation module 11, facing the radial artery puncture point on the patient's wrist, and is used to compress the puncture point to stop bleeding.

[0038] The fixed module 11 includes a base 111 and a wristband 112. The two ends of the wristband 112 are connected to the base 111 respectively, and the connection between the two can be achieved by means of buckles, sewing, etc. The two ends of the wristband 112 are glued with Velcro for easy wearing and adjustment.

[0039] In this embodiment, the wristband 112 is made of a flexible material, such as common fabric, and its function is to wrap around the patient's wrist and other limbs. The base 111 is made of transparent plastic. In other embodiments, the wristband 112 can also be made of other flexible materials such as leather instead of fabric, and the base 111 can also be made of metal, as long as a certain strength and stability can be guaranteed.

[0040] The compression module 12 includes an airbag 121 and a one-way interface 122. The airbag 121 is located on the skin-facing side of the base 111 and is used to compress the puncture point. The one-way interface 122 is located on the base 111, with one end communicating with the airbag 121 and the other end extending to the side of the base 111 away from the airbag 121. In this embodiment, the one-way interface 122 is a valve, which remains closed when no external components are inserted, maintaining the air pressure in the airbag 121. In other embodiments, the one-way interface 122 may also be other types of one-way check valves.

[0041] The sidewall thickness of the airbag 121 is greater than the bottom wall thickness, and a C-shaped reinforcing rib 1211 is pre-embedded in the sidewall of the airbag 121. This prevents the airbag 121 from forming a spherical bulge when inflated. Instead, it expands preferentially towards the bottom while the sidewall contracts inward, generating a "clamping" encircling force. This automatically aligns the center of the airbag 121 with the most prominent point of the radial artery, preventing lateral slippage.

[0042] A light-transmitting film 1212 is provided at the center of the bottom wall of the airbag 121. In this embodiment, the light-transmitting film 1212 is made of a high-transmittance plastic film or other materials, and its function is to allow light to shine on the skin.

[0043] Reference Figure 1 and Figure 3 The control unit 2 includes a control module 21, a pressure application module 22, and a photoelectric sensor module 23. The pressure application module 22 and the photoelectric sensor module 23 are respectively disposed within the control module 21. The control module 21 includes a housing 211 and a controller 212 disposed within the housing 211. The housing 211 has a vent 2111. The housing 211 can be detachably connected to the base 111 by bolts or by other detachable means (such as snap-fit).

[0044] The pressure module 22 includes a miniature air pump 221 and a probe tube 222. The miniature air pump 221 is housed in the housing 211 and electrically connected to the controller 212 so that the controller 212 can control the operation of the miniature air pump 221. In this embodiment, the miniature air pump 221 is a miniature electric air pump and is powered by a built-in battery.

[0045] The probe tube 222 is disposed inside the housing 211 and extends away from the housing 211, with one end of the probe tube 222 connected to the micro air pump 221. When the housing 211 is fixed on the base 111, the probe tube 222 is inserted into the one-way interface 122 and the one-way interface 122 is opened, so that the micro air pump 221 is connected to the airbag 121 through the one-way interface 122. At this time, the probe tube 222 passes through the one-way interface 122 and enters the interior of the airbag 121, so that the micro air pump 221 can be used to inflate or deflate the airbag 121.

[0046] In this embodiment, the probe tube 222 is a hollow cylinder made of a high-transmittance rigid material, such as PMMA or PC, so that the probe tube 222 can act as an optical waveguide through the principle of total internal reflection to conduct light from the photoelectric sensor module 23. In other embodiments, the probe tube 222 may also be made of other materials with similar high transmittance and rigidity.

[0047] The photoelectric sensor module 23 is mounted inside the housing 211 and closely attached to the root end face of the probe tube 222. The wall of the probe tube 222 forms an optical waveguide connected to the photoelectric sensor module 23. In this embodiment, the photoelectric sensor module 23 includes an LED light source and a photodiode, which are respectively disposed inside the housing 211 and electrically connected to the controller 212. The LED light source and the photodiode are respectively closely attached to the root end face of the probe tube 222.

[0048] When it is necessary to detect the blood flow status at the puncture site, the LED light source emits light. The light passes through the wall material of the probe tube 222 and is transmitted to the tip of the probe tube 222 via total internal reflection. The light then directly illuminates the light-transmitting film 1212 at the bottom of the airbag 121, thereby illuminating the skin. When the light shines on the skin, some of the light is absorbed and scattered by the blood in the skin, and the reflected light is received by the photodiode. Because hemoglobin in the blood has different absorption characteristics for different wavelengths of light, and the flow of blood in the arteries causes periodic changes in the amount of light absorbed, the photodiode converts the received light signal into an electrical signal. The controller 212 analyzes and processes the electrical signal to detect the blood flow status at the puncture site.

[0049] The implementation principle of a radial artery hemostat according to an embodiment of this application is as follows: The nurse wears the fixing module 11 on the patient's wrist, and then installs the housing 211 on the base 111. The probe tube 222 is inserted into the balloon 121, and the photoelectric sensor module 23 starts working to detect the blood flow signal at the puncture point. The controller 212 controls the micro air pump 221 to inflate according to the feedback signal. The balloon 121 expands and compresses the puncture point until the blood flow signal is weak or disappears (achieving the hemostasis standard), realizing precise and automatic pressure adjustment. At the same time, during the hemostasis process, the micro air pump 221 can inflate or deflate the balloon 121 according to actual needs to adjust the pressure, thereby minimizing tissue damage.

[0050] Example 2: Refer to Figure 4 The difference between this embodiment and embodiment 1 is that a snap-fit ​​unit 3 is provided between the base 111 and the housing 211.

[0051] Reference Figure 4 and Figure 5 The base 111 has a slot 1111, and the snap-fit ​​unit 3 includes an arched elastic element 31 and an elastic hook 32. There are two elastic hooks 32, which are symmetrically arranged on the housing 211, and the elastic hooks 32 are used to snap and lock with the inner wall of the slot 1111.

[0052] Reference Figure 6There are two arched elastic elements 31, which are parallel to each other and spaced apart. Each arched elastic element 31 has a slide block 33 at both ends. The slide block 33 is slidably mounted on the base 111 and has a fixing structure for connecting the end of the wristband 112.

[0053] Two limiting blocks 1112 are spaced apart on the base 111. Two arched elastic elements 31 are located between the two limiting blocks 1112. The opposite sides of the two arched elastic elements 31 abut against the limiting blocks 1112. The limiting blocks 1112 can restrict the position of the arched elastic elements 31 and ensure the normal operation of the snap-fit ​​unit 3.

[0054] Reference Figure 4 and Figure 5 The bottom of the housing 211 is provided with a groove 2112, and the arched elastic member 31 can be inserted into the groove 2112 and contact the inner wall of the groove 2112, which further ensures the stability of the connection.

[0055] The implementation principle of Example 2 is as follows: In the initial state, the arched elastic element 31 is in a naturally arched state, and the distance between the two sliding seats 33 is relatively close. At this time, the effective circumference of the wristband 112 is relatively long. The nurse wraps the wristband 112 around the patient's wrist and initially attaches the Velcro. At this time, the wristband 112 is not completely tight to the skin, and there is a certain gap.

[0056] Next, the nurse holds the housing 211 and presses it vertically down onto the base 111, inserting the arched elastic element 31 into the groove 2112. At this time, the inner wall of the groove 2112 contacts the top of the arched elastic element 31 and applies pressure to it. As the pressure is applied, the arched elastic element 31 is forced to deform, gradually flattening from an arched state. According to geometric principles, when the arch flattens, its horizontal span increases. Therefore, the two ends of the arched elastic element 31 push the slide block 33 outward, causing the slide block 33 to slide to both sides on the base 111. The outward movement of the slide block 33 directly pulls the wristband 112, shortening the effective circumference of the wristband 112, thereby automatically eliminating the wearing gap and making the wristband 112 fit tightly against the patient's wrist. When the pressure is fully applied, the elastic hook 32 engages with the slot 1111, completing the locking, and the wristband 112 is also in the optimal pre-tension state.

[0057] When disassembly is required, move the elastic hook 32 to remove the housing 211. The arched elastic element 31 springs back to its arched state, and the wristband 112 automatically loosens, making it easy to remove.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hemostatic device for the radial artery, characterized in that, include: The hemostasis unit (1) includes a fixation module (11) and a compression module (12). The fixation module (11) is used to be worn on the limb, and the compression module (12) is disposed on the fixation module (11) and is used to compress the puncture point. The control unit (2) includes a control module (21), a pressure module (22), and a photoelectric sensor module (23). The pressure module (22) and the photoelectric sensor module (23) are respectively disposed in the control module (21). When the control module (21) is detachably connected to the fixed module (11), the pressure module (22) is connected to the compression module (12). The photoelectric sensor module (23) is used to detect the blood flow status at the puncture point. The control module (21) is used to control the operation of the pressure module (22) to precisely adjust the pressure applied to the puncture point by the compression module (12).

2. The radial artery hemostat according to claim 1, characterized in that: The fixed module (11) includes a base (111) and a wristband (112). The wristband (112) is connected to the base (111). The compression module (12) includes an airbag (121) and a one-way interface (122). The airbag (121) and the one-way interface (122) are respectively disposed on the base (111). The airbag (121) is located on the side of the base (111) close to the wristband (112). One end of the one-way interface (122) is connected to the airbag (121), and the other end of the one-way interface (122) can be connected to the pressure application module (22). The control module (21) is detachably connected to the base (111).

3. The radial artery hemostat according to claim 2, characterized in that: The pressure module (22) includes a micro air pump (221) and a probe tube (222). The micro air pump (221) is disposed on the control module (21), and the probe tube (222) is disposed on the control module (21) and extends away from the control module (21). One end of the probe tube (222) is connected to the micro air pump (221), and the other end of the probe tube (222) can pass through the one-way interface (122) and be connected to the airbag (121).

4. The radial artery hemostat according to claim 3, characterized in that: A light-transmitting film (1212) is provided at the center of the bottom wall of the airbag (121). The tube wall of the probe tube (222) forms an optical waveguide connected to the photoelectric sensor module (23). The light transmitted by the optical waveguide can pass through the light-transmitting film (1212) and irradiate the patient's skin.

5. The radial artery hemostat according to claim 4, characterized in that: The sidewall thickness of the airbag (121) is greater than the bottom wall thickness.

6. The radial artery hemostat according to claim 4, characterized in that: The airbag (121) has a C-shaped reinforcing rib (1211) pre-embedded in the side wall.

7. The radial artery hemostat according to claim 2, characterized in that: A snap-fit ​​unit (3) is provided between the base (111) and the control module (21), and the control module (21) is connected to the base (111) through the snap-fit ​​unit (3).

8. The radial artery hemostat according to claim 7, characterized in that: The base (111) has a slot (1111). The snap-fit ​​unit (3) includes an arched elastic element (31) and an elastic hook (32). The two ends of the arched elastic element (31) are respectively provided with slides (33). The slides (33) are slidably disposed on the base (111) and connected to the wristband (112). The elastic hook (32) is disposed on the control module (21). When the control module (21) is pressed down and installed on the base (111), the elastic hook (32) is inserted into the slot (1111) and snaps into the inner wall of the slot (1111). At the same time, the control module (21) presses down the arched elastic element (31).

9. The radial artery hemostat according to claim 8, characterized in that: The bottom of the control module (21) is provided with a groove (2112), and the arched elastic element (31) is inserted into the groove (2112) and contacts the inner wall of the groove (2112).

10. The radial artery hemostat according to claim 8, characterized in that: Two arched elastic elements (31) are provided, and the two arched elastic elements (31) are parallel to each other and spaced apart. Two limiting blocks (1112) are spaced apart on the base (111). The two arched elastic elements (31) are located between the two limiting blocks (1112). The side of the two arched elastic elements (31) that is opposite to each other abuts against the limiting block (1112).

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