A tourniquet

Abstract

The utility model relates to medical auxiliary equipment technical field especially, more particularly to a kind of pulse presser, including pressing part, the two sides of pressing part extend upwards and form two side arms, and at least a part of side arm is elastic material.Pulse presser accurately guides puncture point with pressure, direction is perpendicular, and force is concentrated, can effectively compress the puncture of blood vessel wall, fundamentally prevent subcutaneous blood stasis;Pulse presser can provide sustained, stable pressing once bound, until reaching hemostasis time, user can freely move, greatly improves blood sampling experience.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary equipment technology, and in particular to a pulse depressor. Background Technology

[0002] After blood collection, effective pressure on the puncture site is crucial for preventing postoperative bleeding, subcutaneous bruising (ecchymosis), or hematoma, directly impacting the donor's / patient's experience and safety. Currently, the standard nursing procedure involves covering the puncture site with a sterile cotton ball over a bandage, then securing it with a self-adhesive elastic bandage. After bandaging, donors / patients are clearly instructed to apply continuous pressure to the puncture site with their fingers for 10-15 minutes. However, this traditional method relying on manual pressure has several inherent and difficult-to-overcome technical drawbacks: Firstly, the pressure applied during compression cannot be standardized or maintained: as non-medical professionals, blood donors / patients rely entirely on their personal feelings to apply pressure, which is highly unpredictable. If the pressure is too light, the pressure point is off, or the compression is interrupted due to fatigue, it will not effectively compress the puncture site, causing blood to seep into the subcutaneous tissue, forming bruises or hematomas; if the pressure is too heavy, it may cause local discomfort to the blood donor / patient or even affect distal blood circulation.

[0003] Secondly, it restricts blood donors and results in a poor experience: The continuous pressing for 10-15 minutes requires blood donors / patients to maintain a specific posture, making it difficult for them to move their arms freely or perform other simple activities (such as using a mobile phone, drinking water, etc.). This greatly restricts the freedom of blood donors / patients and reduces the comfort of the blood collection process. Utility Model Content

[0004] To address the aforementioned shortcomings, this invention proposes a pulse depressor.

[0005] The technical solution adopted by this utility model is a pulse depressor, including a pressing part, two side arms extending upward on both sides of the pressing part, and at least a portion of the side arms being made of elastic material.

[0006] Preferably, the width of the side arm is increased at the end furthest from the pressing part.

[0007] Preferably, the upper and / or lower surfaces of the side arm away from the pressing part are provided with raised structures or anti-slip textures.

[0008] Preferably, at least a portion of the upper and / or lower surface of the side arm is configured as a first adhesive surface.

[0009] Preferably, the side arm includes an arched portion and a horizontal portion. The arched portion gradually curves upward from one side of the pressing portion toward the distal end to form the arched portion, and the horizontal portion extends horizontally from the end of the arched portion away from the pressing portion to form the horizontal portion. At least the arched portion is made of an elastic material, the elastic modulus of the arched portion is between 1.2 GPa and 2.5 GPa, the radius of curvature of the arched portion is between 0.5 mm and 1 mm, the thickness of the arched portion is between 1 mm and 1.5 mm, and the height difference between the horizontal portion and the pressing portion is between 5 mm and 8 mm.

[0010] Preferably, at least a portion of the pressing part on one side away from the two side arms is configured as a second adhesive surface.

[0011] Preferably, the pressing part has a raised structure or anti-slip texture on the side away from the two side arms.

[0012] Preferably, the side of the pressing part away from the two side arms is an elliptical plane, and the two side arms are located on both sides of the major axis of the elliptical plane.

[0013] Preferably, the major axis of the elliptical plane is between 27 mm and 33 mm, and the minor axis is between 19 mm and 25 mm.

[0014] Preferably, a sterile hemostatic patch is provided on the side of the pressing part away from the two side arms.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. No need for donors to apply pressure for 10-15 minutes. Once the pulse depressor is attached, it provides continuous and stable pressure until bleeding stops, allowing the user to move freely and greatly improving the blood collection experience. When the device is secured and flattened by the bandage, its overall shape conforms to the curve of the arm, unlike holding a fist or a hard object, allowing for moderate arm movement without a strong foreign body sensation.

[0016] 2. In traditional methods, the circumferential pressure of the bandage is distributed across the entire arm, resulting in insufficient and uneven vertical pressure on the puncture point. The pressure device in this embodiment precisely directs pressure to the puncture point, ensuring a vertical direction and concentrated force, effectively compressing the puncture site on the blood vessel wall and fundamentally preventing subcutaneous hematoma. Attached Figure Description

[0017] The present invention will now be described in detail with reference to the embodiments and accompanying drawings, wherein: Figure 1 This is a schematic diagram of the overall structure of a pulse depressor with the pressing part as the center; Figure 2 yes Figure 1 A schematic diagram of the overall structure from another perspective; Figure 3yes Figure 1 Top view; Figure 4 This is a schematic diagram of the overall structure of a pulse depressor with an elliptical pressing part; Figure 5 yes Figure 4 A schematic diagram of the overall structure from another perspective; Figure 6 yes Figure 4 Top view.

[0018] 10. Pressing part; 11. First raised dot; 12. Second adhesive surface; 20. Side arm; 21. Arched part; 22. Horizontal part; 23. Second protrusion; 24. First adhesive surface. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In one embodiment, a pulse compressor, see [link] Figure 1 , Figure 2 and Figure 3 The device includes a pressing part 10, with two side arms 20 extending upwards from both sides of the pressing part 10. At least a portion of each side arm 20 is made of an elastic material. The pressing part 10, together with the side arms 20, forms an arc-like shape. When the two side arms 20 are subjected to downward pressure, they can undergo elastic deformation, thereby applying downward pressure to the pressing part 10 to replace finger pressing. The elastic material can be a thermoplastic elastomer (TPE), or medical-grade silicone such as liquid silicone rubber (LSR) or high-temperature vulcanized silicone rubber (HTV).

[0021] In use, press the side of the compression part 10 away from the side arm 20 above the puncture point, and then use a self-adhesive elastic bandage to secure the pulse depressor to the arm. When the self-adhesive elastic bandage is wrapped around the arm, a horizontal, circumferential binding force is applied to the side arm 20. Since the side arm 20 is curved upwards, this horizontal binding force is decomposed into a vertically downward component after contacting the inclined surface of the side arm 20. This component force forces the side arm 20 to bend downwards, undergoing elastic deformation. During the forced downward bending process, the material of the side arm 20 generates an elastic restoring force to resist deformation. According to the lever principle, this restoring force, through the side arm 20 as a "lever arm," is ultimately concentrated and transmitted to the compression part 10 connected to the side arm 20. Finally, a relatively small, horizontal bandage binding force is converted and amplified into a concentrated, vertically downward pressing force through this bow-shaped pulse depressor, directly acting on the puncture point to meet the pressing needs.

[0022] No need for donors to apply pressure for 10-15 minutes; once the pulse depressor is attached, it provides continuous and stable pressure until bleeding stops, allowing users to move freely and greatly enhancing the blood collection experience. When the device is secured and flattened by the bandage, its overall shape conforms to the curve of the arm, unlike the awkward feeling of holding a fist or a hard object, allowing for moderate arm movement without a strong foreign body sensation.

[0023] In traditional methods, the circumferential pressure of the bandage is distributed across the entire arm, resulting in insufficient and uneven vertical pressure on the puncture point. The pressure device in this embodiment precisely directs pressure to the puncture point, ensuring a vertical direction and concentrated force, effectively compressing the puncture site on the blood vessel wall and fundamentally preventing subcutaneous hematoma.

[0024] In one embodiment, the pressing part 10 can be various shapes, such as square, round, or rhomboid, to facilitate pressure transmission. Its function is to directly cover the puncture point with a hemostatic patch, evenly transmitting the received force to the skin and blood vessel puncture point. The pressing part 10 is preferably a flat plate; the flat surface ensures sufficient contact with the blood collection point, avoiding excessive local pressure and discomfort. Furthermore, the side of the pressing part 10 away from the two side arms 20 is an elliptical plane, with the two side arms 20 located on either side of the major axis of the elliptical plane. The elliptical shape better conforms to the anatomical contour of the human arm (compared to a circle or square), providing a larger effective pressing area. While ensuring total pressure, it reduces local pressure and improves comfort; the elliptical shape has no sharp edges, making it comfortable to wear and less prone to indentations. Furthermore, the pressing part 10 can be directly set as an elliptical flat plate, see [reference needed]. Figure 4 , Figure 5 and Figure 6The major axis of the elliptical plane is between 27mm and 33mm, and the minor axis is between 19mm and 25mm. This suitable size range ensures that it can fully cover the venipuncture site and its upstream and downstream areas and the puncture site, providing an effective area for compression hemostasis.

[0025] In one embodiment, at least a portion of the side of the pressing part 10 away from the two side arms 20 is configured as a second adhesive surface 12, see [reference]. Figure 5 Specifically, on the side of the pressure point 10 that contacts the skin, a double-sided adhesive or medical pressure-sensitive adhesive layer is applied in whole or in part, covered with release paper. In use, the release paper is first removed, and then the pressure point 10 is attached to the hemostatic patch at the blood collection point. This ensures that the pressure device can accurately and firmly fix the pressure point 10 directly above the puncture point, ensuring that effective pressure is fully applied to the target blood vessel. The design of the second adhesive surface 12 reduces the possibility of the pressure plate shifting when the bandage is tightly bound to the arm; because it takes 10-15 minutes after binding before the self-adhesive elastic bandage can be loosened, the design of the second adhesive surface 12 also reduces the possibility of the pressure plate shifting due to arm movement, ensuring the effectiveness of the pressure.

[0026] In one embodiment, the pressing part 10 has a raised structure or anti-slip texture on the side away from the two side arms 20. The raised structure may be one or more first protrusions 11. See [link to previous embodiment]. Figure 2 The raised structure or anti-slip texture can increase the friction between the pressure part 10 and the hemostatic patch on the puncture point, reduce the displacement of the pulse depressor caused by arm movement, and ensure that the pressure part 10 of the pulse depressor always covers the puncture point.

[0027] In one embodiment, a disinfectant hemostatic patch is provided on the side of the pressing part 10 away from the two side arms 20. Specifically, on the side of the pressing part 10 that contacts the skin, a medical non-woven fabric patch containing disinfectant and / or hemostatic agent is pre-integrated or fixed. This combines disinfection, hemostasis, and pressure into one step, simplifying the nurse's workflow and improving the efficiency and standardization of post-blood collection processing. There is no need to prepare and place a separate hemostatic patch. The pre-placed hemostatic patch provides continuous pharmacological action, synergistically reducing the risk of infection and bruising, and improving user experience and recovery speed.

[0028] In one embodiment, see Figures 1-3The side arm 20 includes an arched portion 21 and a horizontal portion 22. The arched portion 21 gradually curves upward from one side of the pressing portion 10 towards the distal end, and the horizontal portion 22 extends horizontally from the end of the arched portion 21 away from the pressing portion 10. The arched portion 21 may be partially or entirely made of an elastic material. Furthermore, the entire pulse depressor may also be made of an elastic material. The arched portion 21 connects to the pressing portion 10 and gradually curves upward, forming a smooth, arched elastic segment. The horizontal portion 22 is located at the distal end of the arched portion 21, serving as the end of the side arm 20, and extends in an approximately horizontal direction.

[0029] When the self-adhesive elastic bandage is tightened, the force of the bandage first acts vertically on the horizontal part 22. The horizontal part 22 transmits this vertically downward force in the form of a bending moment through the root of the arched part 21. The arched part 21 is thus compressed and deformed (the arch height decreases), generating a strong elastic restoring force within its material. This restoring force, through the lever action at the root of the arched part 21, is ultimately concentrated on the pressing part 10, transforming into a vertical downward pressure on the puncture point.

[0030] In one embodiment, the width of the side arm 20 away from the pressing part 10 is increased. Specifically, if the side arm 20 structure of the previous embodiment is used, this is equivalent to the width of the horizontal part 22 being greater than the width of the arched part 21.

[0031] The width of the end of the side arm 20 furthest from the pressing part 10 (i.e., the free end) is designed to be greater than the width of the main body of the side arm 20, forming a structure similar to a "wingplate" or "pedal". When the self-adhesive elastic bandage is wrapped, the widened end provides a larger contact and force application surface for the bandage, avoiding concentrated force on the bandage edge and making the pressure distribution more even. Narrow and hard edges can easily cut into the bandage material like a knife when the bandage is under force, causing damage to the bandage or curling of the edges. The widening treatment makes the contact boundary smooth, effectively protecting the bandage and improving the reliability of the product and the user experience. The wider base reduces the tendency of the pulse compressor to twist or tip over on the arm, further ensuring the verticality of the pressing direction and the fixation of the position.

[0032] Furthermore, the upper and / or lower surfaces of the side arm 20 away from the pressing part 10 are provided with raised structures or anti-slip textures. Specifically, if the side arm 20 structure of the previous embodiment is used, then the upper and / or lower surfaces of the horizontal part 22 are provided with raised structures or anti-slip textures.

[0033] Raised structures (such as dots or stripes) or anti-slip textures (such as grids or ripples) are created on the ends (upper and / or lower surfaces) of the side arm 20. See also Figure 1 and Figure 4The second protrusion 23 / texture on the upper surface can lock / hook onto the upper self-adhesive elastic bandage, while the one on the lower surface can lock onto the lower skin. When the arm moves, this mechanical interlocking effect effectively resists the lateral slippage tendency of the pressure device caused by elastic restoring force. Preventing slippage means that the downward pressure applied by the bandage can be transmitted to the side arm 20 more efficiently and directly without being lost due to friction, thus ensuring the accurate achievement of the preset pressure.

[0034] In one embodiment, see Figure 2 At least a portion of the upper and / or lower surface of the side arm 20 is configured as a first adhesive surface 24, such as by configuring the horizontal portion 22 and / or the arched portion 21 as the first adhesive surface 24. Specifically, medical pressure-sensitive adhesive is applied to a portion of the upper and / or lower surface of the side arm 20 and protected with release paper. If the horizontal portion 22 on the lower surface of the side arm 20 is configured as the first adhesive surface 24, the release paper can be peeled off before use, and the side arm 20 can be adhered to the desired position on the arm without the need for bandages, saving consumables and simplifying the operation.

[0035] The first adhesive surface 24 of the side arm 20 can be further secured with bandages, which greatly facilitates the subsequent bandage wrapping operation, ensuring the accuracy of the pulse depressor position, and is especially suitable for single-person operation.

[0036] For example, the upper surface of the side arm 20 is provided with a first adhesive surface 24, which can be firmly attached to the bandage, reducing the loosening of the bandage and maintaining the stability of the pressure device.

[0037] In one embodiment, the elastic modulus of the arched portion 21 is between 1.2 GPa and 2.5 GPa, the radius of curvature of the arched portion 21 is between 0.5 mm and 1 mm, the thickness of the arched portion 21 is between 1 mm and 1.5 mm, and the height difference between the horizontal portion 22 and the pressing portion 10 is between 5 mm and 8 mm. These precise mechanical and geometric parameters determine the deformation and required force of the side arm 20 as it is flattened from its initial position to adhere tightly to the skin. Therefore, the downward pressure generated by the planar portion is consistent each time it is used, thereby precisely controlling the final pressure value applied to the puncture point. This ensures that each product provides a consistent pressing pressure within a safe and effective range, completely eliminating the uncertainty of manual pressing. Appropriate elastic modulus and radius of curvature ensure that the side arm 20 is neither too stiff, leading to difficulty in binding and poor comfort, nor too soft, leading to insufficient pressure. A defined height difference defines a clear deformation termination point, making the pressure stable and reliable.

[0038] In the description of this specification, the terms "Embodiment 1," "this embodiment," or "in one embodiment," etc., indicate that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example; moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in one or more embodiments or examples.

[0039] In the description of this specification, the terms "connection," "installation," "fixing," "setting," and "having" are interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] In the description of this specification, relational terms such as “first” and “second” are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] The above description of the embodiments is intended to enable those skilled in the art to understand and apply the technology of this invention. Those skilled in the art can readily make various modifications to these examples and apply the general principles described herein to other embodiments without creative effort. Therefore, this invention is not limited to the above embodiments. Modifications in the following situations should be within the scope of protection of this invention: ① New technical solutions implemented based on the technical solution of this utility model and combined with existing common knowledge, where the technical effects of the new technical solution do not exceed the technical effects of this utility model; ② Equivalent substitutions of some features of the technical solution of this utility model using known technology, resulting in the same technical effects as those of this utility model; ③ Extendable technical solutions based on the technical solution of this utility model, where the substantive content of the extended technical solution does not exceed the technical solution of this utility model; ④ Equivalent transformations made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields.

Claims

1. A pulse depressor, characterized in that, It includes a pressing part, and two side arms extend upward from both sides of the pressing part to form two side arms, at least a portion of which is made of elastic material.

2. The pulse compressor according to claim 1, characterized in that, The width of the side arm increases at the end furthest from the pressing part.

3. The pulse compressor according to claim 1, characterized in that, The upper and / or lower surfaces of the side arm away from the pressing part are provided with raised structures or anti-slip textures.

4. The pulse compressor according to claim 1, characterized in that, At least a portion of the upper and / or lower surface of the side arm is configured as a first adhesive surface.

5. The pulse compressor according to claim 1, characterized in that, The side arm includes an arched portion and a horizontal portion. The arched portion gradually curves upward from one side of the pressing portion to the distal end, and the horizontal portion extends horizontally from the end of the arched portion away from the pressing portion. At least the arched portion is made of an elastic material, the elastic modulus of the arched portion is between 1.2 GPa and 2.5 GPa, the radius of curvature of the arched portion is between 0.5 mm and 1 mm, the thickness of the arched portion is between 1 mm and 1.5 mm, and the thickness is between 5 mm and 8 mm.

6. The pulse compressor according to any one of claims 1-5, characterized in that, At least a portion of the pressing part on one side away from the two side arms is configured as a second adhesive surface.

7. The pulse compressor according to any one of claims 1-5, characterized in that, The pressing part has a raised structure or anti-slip texture on the side away from the two side arms.

8. The pulse compressor according to any one of claims 1-5, characterized in that, The side of the pressing part away from the two side arms is an elliptical plane, and the two side arms are located on both sides of the major axis of the elliptical plane.

9. The pulse compressor according to claim 8, characterized in that, The major axis of the elliptical plane is between 27 mm and 33 mm, and the minor axis is between 19 mm and 25 mm.

10. The pulse compressor according to any one of claims 1-5, characterized in that, A disinfectant hemostatic patch is provided on the side of the pressing part away from the two side arms.

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