Self-adaptive pressure tourniquet

Abstract

The utility model relates to a self-adaptive pressure tourniquet which comprises a fixing band body, the unfolding face of the fixing band body is in a sector shape with the upper portion wide and the lower portion narrow, rope drawing grooves are formed in the upper end and the lower end of the fixing band body along the edges, corresponding drawing ropes are arranged in the rope drawing grooves, and the other ends of the drawing ropes are movably connected with contraction blocks. The upper end of the side, attached to the skin, of the fixing band body is fixedly connected with a first air bag, the lower end of the side, attached to the skin, of the fixing band body is fixedly connected with a second air bag, and the fan-shaped tourniquet with the wide upper portion and the narrow lower portion can better adapt to differences of limb shapes and sizes of different patients; according to the tourniquet, the fixing band body is arranged, the attaching degree of the fixing band body and the limb is further adjusted through the drawing rope, the tourniquet can be tightly attached to the limb parts with different thicknesses, the multiple air bags can distribute pressure more evenly, and the risk of tissue ischemia and even necrosis caused by uneven pressure is reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an adaptive pressure tourniquet. Background Technology

[0002] Pneumatic tourniquets are widely used in limb trauma surgery to reduce intraoperative wound bleeding, improve surgical visibility, and facilitate surgical procedures. They are commonly used in various surgeries of the extremities, such as fracture reduction and internal fixation, excision of limb masses or cysts, exploration and repair of nerves, tendons, and blood vessels, arthroscopic surgery, finger, elbow, and knee joint surgeries, amputations, and replantation of severed limbs and toes. However, existing pneumatic tourniquets face many challenges in practical applications. For example, patent CN221105930U discloses an adjustable tourniquet compressor. Although it also tightens and loosens the tourniquet by inflating and deflating the air bladder, it does not fit tightly and has gaps. Different patients have different limb shapes and sizes, and the thickness of the tourniquet varies from proximal to distal at the same location. Furthermore, skin conditions such as dryness, moisture, looseness, or tightness also affect the fit, with patients with loose skin being more prone to poor fit. In addition, the padding of the tourniquet is thin, and the tourniquet directly compresses the skin, causing an imbalance of pressure points that can lead to tissue ischemia or even necrosis. When the limb is raised during disinfection, the disinfectant can flow into the air bladder and accumulate under the edge, which can cause chemical burns. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] In view of the limitations of existing tourniquets, the purpose of this invention is to provide an adaptive pressure tourniquet. The pneumatic tourniquet is designed in a fan shape, wider at the top and narrower at the bottom, which better adapts to the differences in limb shape and size among patients. This allows for a more snug fit at different locations on the limb. Furthermore, by adjusting the drawstring, the fit between the tourniquet and the limb can be further adjusted, ensuring a tight fit to limb parts of varying thicknesses. This effectively solves the problem of loose fit caused by differences in limb shape and size among patients, as well as differences in thickness at the proximal and distal ends of the same area. In addition, the design of multiple air bladders effectively disperses pressure, preventing pressure concentration at a single point when a single air bladder inflates. In other words, multiple air bladders distribute pressure more evenly, reducing the risk of tissue ischemia or even necrosis due to uneven pressure. Simultaneously, the presence of a vibration valve can, to some extent, prevent local blood pooling, further reducing the risk of tissue damage.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: an adaptive pressure tourniquet, comprising a fixing band body, the unfolded surface of which is a fan shape wider at the top and narrower at the bottom, both ends of the fixing band body are provided with drawstring grooves along the edges, each drawstring groove is provided with a corresponding drawstring, the other end of the drawstring is movably connected to a contraction block, the upper end of the side of the fixing band body that is in contact with the skin is fixedly connected to a first airbag, and the lower end of the side of the fixing band body that is in contact with the skin is fixedly connected to a second airbag. The tourniquet's unfolded surface is a fan shape with a certain curvature, meaning both the upper and lower edges of the fan have a certain curvature. This allows it to better adapt to the natural shape of the limb, especially when there are significant differences in thickness between different parts of the limb. For example, in the transition area from the proximal to the distal end of the limb, the lower end of the fan has a smaller curvature, allowing it to fit the thinner parts of the limb, while the upper end has a larger curvature, allowing it to fit the thicker parts. For instance, when fixing the calf, the larger curvature part fits the thicker area of ​​the calf (mid-calf), and the smaller curvature part fits the thinner area of ​​the calf (ankle). By pulling the drawstring and tightening it using the contraction block, the tightness of the tourniquet can be precisely adjusted according to the patient's specific limb size and shape, ensuring that the tourniquet fits the limb tightly for good hemostasis without being too tight and causing discomfort or injury to the patient.

[0007] Preferably, the first airbag includes a first main airbag fixed in the middle of the upper part of the fixing belt body and first sub-airbags sequentially connected to both sides of the first main airbag. The second airbag includes a second main airbag fixed in the middle of the lower part of the fixing belt body and second sub-airbags sequentially connected to both sides of the second main airbag. Both the first and second airbags are laid along the unfolded surface of the fixing belt body, that is, covering the entire fixing belt body. When the fixing belt body is fully unfolded, the first and second airbags are laid on the side that is in contact with the skin. Specifically, the first airbag is located in the upper half of the fixing belt body, and the second airbag is located in the lower half of the fixing belt body, with a certain gap reserved between the first and second airbags. Both the first and second airbags are distinguished into main airbag parts and sub-airbag parts. That is, the airbag located in the middle area of ​​the fixing belt body is larger than the airbags in the side areas and is the main airbag. Several sub-airbags of the same size are then sequentially fixed on both sides of the main airbag. These several sub-airbags and the main airbag are connected to form a main body, but are independent of each other and can control each airbag individually.

[0008] Preferably, pneumatic pumps are fixedly connected to the tops of the first main airbag, the first sub-airbag, the second main airbag and the second sub-airbag, and spiral patterns are provided on their surfaces. The pneumatic pumps mainly provide inflation power for the airbags to ensure that the airbags can obtain stable and controllable air pressure. The pneumatic pumps can be connected to a control backend, which can be devices such as a remote control or a display screen. The pneumatic pumps in each airbag are individually connected to the control backend (remote control, display screen, etc.). By operating the control backend, the state of the pneumatic pump can be adjusted, that is, the pressure in each airbag can be independently controlled, enabling the airbag pressure to be adjusted more quickly and accurately to meet the requirements of different surgical scenarios and patient conditions. In addition, spiral patterns are provided on the surface of each airbag, that is, on the side that fits the patient's skin. First, this can increase the contact area between the airbag and the patient's skin, enabling the pressure to be more evenly distributed on the skin and reducing the situation of too high or too low local pressure. Second, by increasing the friction, it effectively prevents the tourniquet from shifting due to the movement of the patient's limb or other factors during use, further improving the stability and reliability of the tourniquet.

[0009] Preferably, a vibration valve and a sensor are fixedly connected inside the first main airbag and the second main airbag. The sensor is responsible for real-time monitoring of the pressure changes inside the airbag. It can accurately transmit the collected pressure data to the control system, which can be a monitoring device配套 with the tourniquet or a central monitoring system in the operating room. Through the control system, medical staff can随时 understand the pressure state of the tourniquet and make timely adjustments. The vibration valve can automatically adjust the air pressure according to the pressure data feedback by the sensor to maintain the best hemostatic effect. That is to say, when the sensor detects that the pressure is too high, the vibration valve will automatically open the deflation function to reduce the airbag pressure. On the contrary, when the pressure is too low to effectively stop bleeding, the vibration valve can automatically start the inflation mechanism to make the pressure rise back to the appropriate range, ensuring that the tourniquet continuously发挥良好的止血功能.

[0010] Preferably, a first silicone pad is fixedly connected between the first airbag and the second airbag, and a second silicone pad is fixed in a circle on the side of the fixing belt body靠近 the patient's limb. The first silicone pad fixedly connected between the first airbag and the second airbag can play a dual role of buffering and connecting. The second silicone pad is fixed in a circle around the side of the fixing belt body靠近 the patient's limb and is mainly used for direct contact with the patient's skin to reduce the friction and irritation of the tourniquet on the skin. During the inflation process of the airbag, since the first airbag and the second airbag may产生相对位移 or deformation due to pressure changes, the first silicone pad can absorb the stress generated by this deformation, avoiding direct friction and collision between the airbags, thereby延长 the service life of the airbag.

[0011] It should be noted that there are some inaccuracies in the original Chinese text, such as "配套" which should be "matched with" in the English translation, and "随时" which should be "at any time". Also, "发挥良好的止血功能" is translated as "continuously play a good hemostatic function" which is a bit literal and could be more precisely expressed as "continuously achieve a good hemostatic effect". And "靠近" is translated as "close to" which is a bit general and could be more contextually appropriate as "adjacent to" or "near to" in some cases. These are adjusted in the translation to make it more accurate and natural.Preferably, the first and second airbags are connected sequentially to a terminal air supply device. The terminal air supply device provides air to the airbags and, through linkage with the tourniquet's control system, enables precise control of the inflation process. Specifically, based on the surgical type and the patient's condition, a suitable air pressure range and inflation mode are pre-set, and the terminal air supply device supplies air to the airbags according to the set parameters. Simultaneously, during use, the air supply status is adjusted in real time based on feedback from sensors and vibration valves to ensure the tourniquet is always in optimal working condition.

[0012] (III) Beneficial Effects

[0013] (1) The fixation band body is designed as a fan shape with an arc, wider at the top and narrower at the bottom, which can adapt well to the natural shape of the limb. When different parts of the limb have different thicknesses, the upper and lower arc parts of the fan shape can be fitted separately, so that the tourniquet is in close contact with the limb. This effectively avoids the problem of loose fit caused by changes in limb shape. By pulling the drawstring and tightening block, it can be precisely adjusted according to the specific limb size and shape of the patient, further enhancing the adaptability of the tourniquet to different individual limbs, ensuring a close fit to the limb during hemostasis, and guaranteeing the hemostatic effect.

[0014] (2) The first and second airbags respectively contain a main airbag and a sub-airbag, and each airbag can be controlled by an independently connected pneumatic pump. The pressure of each airbag can be adjusted individually for different bleeding sites and situations to achieve more precise pressure distribution. At the same time, the air pressure can be automatically adjusted according to the pressure data to maintain the best hemostasis effect. It can effectively prevent excessive pressure from causing excessive compression to the limb or insufficient pressure from causing poor hemostasis effect, which greatly improves the safety and effectiveness of tourniquet use.

[0015] (3) The spiral pattern on the surface of each air bladder increases the contact area between the air bladder and the skin, making the pressure evenly distributed on the skin and reducing local pressure abnormalities. At the same time, it can effectively increase friction, prevent the tourniquet from shifting during the patient's limb movement or other situations, ensure the stability of the tourniquet during use, and help to exert a continuous and stable hemostatic effect. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the present invention;

[0017] Figure 2 This is a top view of the entire utility model;

[0018] Figure 3 This is a schematic diagram of the main airbag and the sub-airbags in this utility model;

[0019] In the diagram: 1-Fixing strap body, 10-Drawstring groove, 11-Drawstring, 2-Contraction block, 3-First airbag, 30-First main airbag, 31-First sub-airbag, 4-Second airbag, 40-Second main airbag, 41-Second sub-airbag, 5-Pneumatic pump, 6-Vibration valve, 7-Sensor, 8-First silicone pad, 9-Second silicone pad. Detailed Implementation

[0020] The following will refer to the appendix in the embodiments of this utility model. Figure 1 - Appendix Figure 3 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Example 1: As Figure 1 As shown, the first specific embodiment of this utility model provides an adaptive pressure tourniquet, including a fixing band body 1. The unfolded surface of the fixing band body 1 is a fan shape, wider at the top and narrower at the bottom. Both the upper and lower ends of the fixing band body 1 are provided with drawstring grooves 10 along their edges. Each drawstring groove 10 has a corresponding drawstring 11 inside. The other end of the drawstring 11 is movably connected to a contraction block 2. A first airbag 3 is fixedly connected to the upper end of the side of the fixing band body 1 that is in contact with the skin, and a second airbag 4 is fixedly connected to the lower end of the side of the fixing band body 1 that is in contact with the skin. Because human limbs are usually thicker at the proximal end (closer to the center of the body) and thinner at the distal end (farthest from the center of the body), such as the shape of the arm from the shoulder to the wrist and the leg from the thigh to the ankle, the fan shape allows the wider upper part of the tourniquet to fit the thicker part of the limb when it is wrapped around the limb, and the narrower lower part to fit the thinner part of the limb, making the tourniquet fit the limb more naturally and tightly. Furthermore, the curved edges of the fan-shaped design effectively prevent gaps or incomplete fit due to variations in limb size, ensuring good hemostasis across different limb locations. Additionally, drawstrings 11 are installed within the drawstring grooves 10 at both ends, connected by contraction blocks 2. This allows medical personnel to precisely adjust the tourniquet's tightness according to the patient's specific limb size and shape. By pulling the drawstring 11 and tightening it using the contraction blocks 2, the tourniquet can fit snugly against the limb without being too tight, adapting to patients of various body types and reducing discomfort or injury caused by an overly tight tourniquet. It also avoids poor hemostasis due to an overly loose tourniquet.

[0022] The first airbag 3 includes a first main airbag 30 fixed in the middle of the upper part of the fixing belt body 1 and first branch airbags 31 connected sequentially to both sides of the first main airbag 30. The second airbag 4 includes a second main airbag 40 fixed in the middle of the lower part of the fixing belt body 1 and second branch airbags 41 connected sequentially to both sides of the second main airbag 40. The first main airbag 30 and the second main airbag 40 are located in the middle of the upper and lower parts of the fixing belt body 1. During hemostasis, pressure can be applied specifically to the distribution area of ​​the main blood vessels of the limb or the area where bleeding is concentrated, which can more effectively stop blood flow. The first branch airbags 31 and the second branch airbags 41 on both sides can provide auxiliary pressure to the area around the main airbag. Because bleeding may not be limited to the middle area where the main blood vessels are located, small blood vessels in the surrounding area may also bleed. The branch airbags can control the bleeding in these surrounding areas by adjusting the pressure according to the actual bleeding range and degree, achieving more precise pressure adjustment of the entire hemostasis area and making the hemostasis effect more ideal. The zonal design of the main airbag and the branch airbags can flexibly deal with various complex bleeding situations. For cases where bleeding points are concentrated, the main balloon can be used primarily for pressure application. However, for cases with wider bleeding, such as extensive soft tissue injury, both the main balloon and the secondary balloons can be used simultaneously. By adjusting the pressure of the different balloons, a pressure distribution matching the bleeding area can be created, thus controlling the bleeding more effectively. Simultaneously, the pressure generated by the main balloon can be distributed more evenly across the entire hemostatic area through the secondary balloons, avoiding excessive pressure on blood vessels, nerves, and other tissues, and reducing the occurrence of complications. The zoned balloon design makes the tourniquet application gentler and more even, reducing patient discomfort, especially during prolonged tourniquet use, and effectively improving patient tolerance.

[0023] The tops of the first main airbag 30, the first sub-airbag 31, the second main airbag 40, and the second sub-airbag 41 are all fixedly connected to pneumatic pumps 5, and their surfaces are all decorated with spiral patterns. Each airbag is connected to a pneumatic pump 5, allowing medical personnel to independently inflate each airbag. In different surgical scenarios or for different patients' hemostasis needs, the inflation volume of each airbag can be precisely controlled according to the specific situation, thereby achieving precise adjustment of the tourniquet pressure. This effectively stops bleeding without damaging nerves or other tissues in the hand due to excessive pressure. Simultaneously, the pneumatic pump 5 can quickly inflate or deflate the airbags. In cases of massive bleeding, the pneumatic pump 5 can rapidly inflate the airbags, allowing the tourniquet to quickly reach effective hemostatic pressure and control bleeding promptly. Furthermore, the pneumatic pump 5 can provide stable air pressure to the airbags, ensuring that the hemostatic pressure remains at the required level throughout the hemostasis process, reducing the risk of poor hemostasis or damage to the patient's limb tissues due to unstable air pressure.

[0024] The spiral grooves on the surface of the air bladder increase the contact area between the bladder and the patient's skin. During inflation, as the bladder expands and adheres to the skin, the grooves allow for a more even distribution of pressure. This even pressure distribution ensures a tighter and more stable fit between the tourniquet and the skin. This is crucial for preventing tourniquet displacement due to slight movement of the patient's limb during hemostasis. When the pressure is evenly distributed, the tourniquet is better secured to the limb in all directions, maintaining effective pressure on blood vessels and reducing the risk of rebleeding due to tourniquet displacement. Furthermore, it effectively increases the friction between the air bladder and the skin. When the patient's limb moves or is subjected to external forces, this friction prevents the tourniquet from shifting on the limb, ensuring that the hemostatic effect is not affected and improving the reliability of the tourniquet.

[0025] Vibration valve 6 and sensor 7 are fixedly connected inside the first main airbag 30 and the second main airbag 40. Sensor 7 can monitor the pressure changes inside the first main airbag 30 and the second main airbag 40 in real time, allowing medical personnel to obtain accurate pressure values ​​at any time. Simultaneously, vibration valve 6 and sensor 7 work together to automatically adjust the air pressure inside the airbags to maintain optimal hemostasis. When sensor 7 detects excessively high pressure, vibration valve 6 automatically activates the deflation function to reduce the airbag pressure and prevent this from happening. Conversely, when the pressure is too low and insufficient for effective hemostasis, vibration valve 6 automatically activates the inflation mechanism to restore the pressure to the appropriate range, ensuring the tourniquet continues to perform its hemostatic function effectively. Furthermore, the automatic adjustment function of vibration valve 6 can intelligently respond to these pressure fluctuations, adjusting the airbag pressure in a timely manner to ensure the tourniquet remains in a stable and effective working state, reducing the risk of hemostasis failure or harm to the patient due to pressure fluctuations.

[0026] A first silicone pad 8 is fixedly connected between the first airbag 3 and the second airbag 4, and a second silicone pad 9 is fixed around the side of the tourniquet body 1 closest to the patient's limb. During airbag inflation, the first airbag 3 and the second airbag 4 expand due to the increase in internal air pressure, which may cause relative displacement or deformation. The first silicone pad 8, fixedly connected between them, absorbs the stress generated by this deformation, preventing the two airbags from directly squeezing, rubbing, or colliding with each other. In other words, the first silicone pad 8 acts as a buffer, effectively reducing the impact of this change on the airbags, thereby extending the lifespan of the airbags. In addition, the first silicone pad 8 connects the first airbag 3 and the second airbag 4, making the entire tourniquet airbag structure more coherent and stable. During hemostasis, the first silicone pad 8 ensures that the first airbag 3 and the second airbag 4 maintain a stable relative position during operation, working together to achieve better hemostasis.

[0027] The second silicone pad 9 encircles the main body 1 of the tourniquet near the patient's limb, directly contacting the patient's skin. The silicone material itself is soft and smooth, effectively reducing friction between the tourniquet and the skin during use. This effectively prevents skin abrasions and chafing during prolonged use or when the patient's limb is active, protecting the skin's integrity. Furthermore, the second silicone pad 9 also helps prevent the tourniquet from shifting on the limb. By contacting the skin, it provides resistance, allowing the tourniquet to remain in its original position and ensuring the stability and effectiveness of hemostasis.

[0028] The first airbag 3 and the second airbag 4 are sequentially connected to the terminal air supply device. Connecting to the terminal air supply device means that appropriate air pressure ranges and inflation modes can be pre-set on the device according to the type of surgery and the patient's specific condition. By pre-setting parameters on the terminal air supply device, precise air pressure can be provided to the corresponding airbags, ensuring that the tourniquet achieves ideal hemostasis upon initial use. Simultaneously, the terminal air supply device, through coordinated work with other components, can dynamically optimize the hemostasis process, contributing to improved hemostasis quality and patient comfort.

[0029] Working principle: In use, first wrap the tourniquet body 1 around the patient's bleeding limb. Its fan-shaped design, wider at the top and narrower at the bottom, allows the tourniquet to naturally conform to the limb's contour, initially ensuring good contact between the tourniquet and the limb. Then, pull the drawstring 11 within the drawstring grooves 10 at both ends of the tourniquet body 1, and tighten the drawstring using the contraction block 2 to further adjust the tightness of the tourniquet on the limb, achieving a suitable initial fixation effect for the patient's limb. Subsequently, the pneumatic pump 5 connected to the first main airbag 30, the first sub-airbag 31, the second main airbag 40, and the second sub-airbag 41 is activated to inflate each airbag. During inflation, the spiral pattern on the surface of the airbag gradually comes into close contact with the patient's skin, increasing the contact area and friction, further improving the stability and fit of the tourniquet. The sensors 7 inside the first main airbag 30 and the second main airbag 40 monitor the pressure changes inside the airbag in real time and transmit the pressure data to the control system. The vibration valve 6 automatically adjusts the air pressure according to the preset pressure range. If the pressure is lower than the preset range, the vibration valve 6 will control the pneumatic pump 5 to increase the inflation volume. If the pressure is found to be insufficient or too high, or if the patient experiences discomfort, medical staff can adjust the tightness of the tourniquet and the pressure inside the airbag in a timely manner through the control system based on the monitoring data. When the bleeding is effectively controlled, the terminal air supply equipment is turned off to stop inflating the airbag, and the air is gradually deflated to reduce the pressure. During the deflation process, the airbag gradually returns to its original shape under its own elasticity and pressure release. Finally, press the contraction block 2 and release the drawstring 11 to easily remove the tourniquet and further clean and treat the patient's wound.

Claims

1. An adaptive pressure tourniquet, comprising a fixing band body (1), wherein the unfolded surface of the fixing band body (1) is a fan shape that is wider at the top and narrower at the bottom, characterized in that, The upper and lower ends of the fixing strap body (1) are provided with drawstring grooves (10) along the edges. Each drawstring groove (10) is provided with a corresponding drawstring (11). The other end of the drawstring (11) is movably connected to a shrink block (2). The upper end of the side of the fixing strap body (1) that is in contact with the skin is fixedly connected to a first airbag (3). The lower end of the side of the fixing strap body (1) that is in contact with the skin is fixedly connected to a second airbag (4).

2. The adaptive pressure tourniquet according to claim 1, characterized in that, The first airbag (3) includes a first main airbag (30) fixed in the middle of the upper part of the fixing belt body (1) and a first sub-airbag (31) connected in sequence to both sides of the first main airbag (30). The second airbag (4) includes a second main airbag (40) fixed in the middle of the lower part of the fixing belt body (1) and a second sub-airbag (41) connected in sequence to both sides of the second main airbag (40).

3. The adaptive pressure tourniquet according to claim 2, characterized in that, The top of the first main airbag (30), the first sub-airbag (31), the second main airbag (40) and the second sub-airbag (41) are all fixedly connected to a pneumatic pump (5), and their surfaces are all provided with spiral patterns.

4. The adaptive pressure tourniquet according to claim 3, characterized in that, Vibration valve (6) and sensor (7) are fixedly connected inside the first main airbag (30) and the second main airbag (40).

5. The adaptive pressure tourniquet according to claim 1, characterized in that, A first silicone pad (8) is fixedly connected between the first airbag (3) and the second airbag (4), and a second silicone pad (9) is fixed around the side of the fixing strap body (1) near the patient's limb.

6. The adaptive pressure tourniquet according to claim 1, characterized in that, The first airbag (3) and the second airbag (4) are connected in sequence to the terminal air supply equipment.

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