Automatic inflation timing alarm first-aid hemostasis device

Abstract

The invention belongs to the technical field of first-aid hemostasis devices, and particularly relates to an automatic inflation timing alarm first-aid hemostasis device which comprises an inflation device body and a pressurizing bandage, the inflation device body comprises a bearing cavity, a control panel is arranged at the top of the bearing cavity, and a partition plate is arranged in the middle of the bearing cavity; a miniature air pump and an exhaust valve are arranged at the bottom of the bearing cavity, an air bag is arranged in an inner cavity of the pressurizing bandage, a pressure sensor is arranged in an inner cavity of the air bag, a bonding layer and a bonding bearing layer are arranged on the surface of the top of the pressurizing bandage, and an adjusting ring is arranged at the end, away from the bonding layer, of the pressurizing bandage. The invention aims to provide the automatic inflation timing alarm first-aid hemostasis device, solves the technical problems of inaccurate pressure control, lack of automatic timing alarm function, tedious operation and insufficient stability of existing hemostasis equipment, and realizes the following core targets.

Description

Technical Field

[0001] This invention relates to the field of emergency hemostasis devices, specifically an automatic inflation timing alarm emergency hemostasis device. Background Technology

[0002] In trauma emergency care, massive bleeding is one of the leading causes of shock and even death in injured individuals. Statistics show that approximately 30%-40% of trauma deaths worldwide are directly related to uncontrolled massive bleeding. Currently, commonly used hemostatic devices in clinical and emergency settings mainly include traditional tourniquets (such as rubber tubing and cloth tourniquets), manually inflatable tourniquets, and some semi-automatic hemostatic devices. However, these devices generally suffer from the following technical deficiencies:

[0003] (a) Limitations of traditional tourniquets

[0004] Traditional tourniquets (such as rubber tourniquets and cloth tourniquets) rely on manual application of pressure, which has the following problems: First, the pressure control precision is extremely low, relying entirely on the operator's experience. Insufficient pressure can lead to hemostasis failure, while excessive pressure can cause secondary injuries such as local tissue ischemia and necrosis, and nerve damage. Second, there is no timing function. Tourniquet usage guidelines clearly require that "hemostasis on the upper limbs should not exceed 1 hour, and on the lower limbs, it should not exceed 1.5 hours." However, in actual rescue operations, operators often forget the release time due to tension or busyness, resulting in prolonged pressure and irreversible limb damage. Third, the operation threshold is high. Non-professionals find it difficult to master the correct binding force and method, making it impossible to quickly and effectively stop bleeding in emergency situations.

[0005] (ii) Defects of existing pneumatic tourniquets

[0006] While currently available manual inflatable tourniquets (such as balloon tourniquets) have improved the convenience of pressure adjustment to some extent, they still have significant shortcomings: First, they require continuous manual inflation, which is cumbersome and the pressure cannot be precisely quantified, only roughly displayed by a pressure gauge, making it difficult to adapt to different limb sizes and bleeding conditions of different injured persons; Second, they lack automatic timing and alarm functions, still requiring operators to manually record the time, which easily leads to the risk of over-inflation; Third, the depressurization process relies on manual operation of the air valve, and the depressurization speed and pressure control are unstable, which may cause rebleeding due to excessively rapid depressurization, or prolong tissue ischemia time due to excessively slow depressurization.

[0007] (iii) Inadequacy of semi-automatic hemostasis devices

[0008] Although a few semi-automatic hemostasis devices integrate air pumps and pressure sensors, they suffer from complex structures, large size, and inconvenience in carrying, making them unsuitable for mobile rescue scenarios such as outdoor and battlefield environments.

[0009] To address the shortcomings of the existing technologies, this invention proposes an automatic inflation timing alarm emergency hemostasis device. By integrating an automatic inflation module, a precise pressure monitoring module, a timing alarm module, and a convenient fixing structure, it achieves integrated functions of "automatic inflation, precise pressure control, timing reminder, and safe pressure release," reducing the operational threshold, improving the safety and effectiveness of hemostasis, and filling the gap in automation and intelligence of existing emergency hemostasis equipment. Summary of the Invention

[0010] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0011] In view of the problems existing in the current automatic inflation timing alarm emergency hemostasis device, the present invention is proposed.

[0012] Therefore, the purpose of this invention is to provide an automatic inflation timing alarm emergency hemostasis device, which solves the technical problems of inaccurate pressure control, lack of automatic timing alarm function, cumbersome operation, and insufficient stability of existing hemostasis equipment, and achieves the following core objectives:

[0013] Automatic inflation and precise pressure control adapt to different limb sizes and bleeding conditions, avoiding secondary injuries caused by insufficient or excessive pressure;

[0014] It integrates a timing function to record the hemostasis time in real time, and automatically issues an alarm when the time limit is exceeded to remind the operator to release the bleeding in time;

[0015] The simplified operation process allows non-professionals to quickly put on and activate the device, improving hemostasis efficiency in emergency situations.

[0016] The strap fixing structure has been optimized to ensure that the straps remain stable and do not loosen during the pressurization process, while also facilitating the adjustment of tightness;

[0017] To achieve safe depressurization, the depressurization rate can be controlled manually or automatically to avoid rebleeding caused by improper depressurization.

[0018] To address the aforementioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0019] An automatic inflatable timing alarm emergency hemostasis device includes an inflatable device body and a pressure strap;

[0020] The main body of the inflation device includes a bearing cavity, a control plate is provided at the top of the bearing cavity, a partition is provided in the middle of the bearing cavity, and a micro air pump and an exhaust valve are provided at the bottom of the bearing cavity;

[0021] The pressure strap has an air bladder inside, and a pressure sensor is installed inside the air bladder. The top surface of the pressure strap has an adhesive layer and a support layer, and an adjustment ring is installed at the end away from the adhesive layer.

[0022] As a preferred embodiment of the automatic inflation timing alarm emergency hemostasis device of the present invention, the control panel is provided with a display screen and control buttons.

[0023] As a preferred embodiment of the automatic inflation timing alarm emergency hemostasis device of the present invention, wherein: a microcontroller is installed on the partition, a time relay is integrated on the microcontroller, and alarms are provided on both sides of the microcontroller.

[0024] As a preferred embodiment of the automatic inflation timing alarm emergency hemostasis device of the present invention, wherein: the air outlet of the micro air pump is equipped with an air inlet pipe, and the air inlet pipe is connected to the air inlet of the airbag.

[0025] As a preferred embodiment of the automatic inflation timing alarm emergency hemostasis device of the present invention, wherein: an exhaust pipe is installed at the air inlet end of the exhaust valve, and the exhaust pipe is connected to the exhaust port of the airbag.

[0026] As a preferred embodiment of the automatic inflation timing alarm emergency hemostasis device of the present invention, the pressure straps are located on both sides of the inflation device body and are fixedly connected to the inflation device body.

[0027] As a preferred embodiment of the automatic inflation timing alarm emergency hemostasis device of the present invention, wherein: the pressure strap on one side passes through the adjustment ring and is bonded to the support layer through the adhesive layer.

[0028] As a preferred embodiment of the automatic inflation timing alarm emergency hemostasis device of the present invention, the time relay, control button and pressure sensor are electrically connected to the microcontroller, and the microcontroller is electrically connected to the exhaust valve, micro air pump, alarm and display screen.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] 1. More Reliable Closed-Loop Pressure Control: Utilizing a MEMS miniature pressure sensor (measurement accuracy ±1kPa) and an STM32F103 microcontroller to form a real-time feedback loop, the airbag pressure can be stably controlled within a preset threshold range of ±5%, far superior to the ±20kPa pressure error of traditional tourniquets. For different hemostasis needs in the upper limbs (recommended 200-250kPa) and lower limbs (recommended 250-300kPa), stepless pressure adjustment can be achieved via a control button, avoiding hemostasis failure due to insufficient pressure or tissue necrosis and nerve damage caused by excessive pressure.

[0031] 2. Dynamic pressure replenishment ensures continuous effect: The pressure sensor collects data every 0.5 seconds. When the airbag pressure drops below the threshold of 5% due to minor leakage, the microcontroller automatically starts the micro air pump to replenish the pressure, which solves the problem of "pressure decay after one pressurization" in existing inflatable tourniquets and ensures that the pressure always meets the standard during long-term hemostasis.

[0032] 3. Multi-mode timing adaptability: The time relay supports precise timing from 0 to 99 minutes (1-second accuracy), with preset safety thresholds of 60 minutes for upper limbs and 90 minutes for lower limbs, and is compatible with the tourniquet usage guidelines in the "Trauma First Aid Guidelines". After the timing starts, the display screen scrolls to show the remaining time in real time, completely eliminating the risk of over-pressurization due to tension or busyness compared to the "manual timing" method of existing devices.

[0033] 4. Dual Audible and Visual Alarms for Comprehensive Coverage: The alarm employs a dual design of an 85dB buzzer and a high-brightness LED flashing light. In noisy environments such as battlefields and traffic accident scenes, the auditory and visual alarms complement each other, ensuring rapid identification by operators within a 10-meter range. Upon alarm triggering, a pop-up window on the display screen simultaneously prompts "Please loosen the tourniquet," and displays the safe loosening interval (10-15 minutes for upper limbs, 15-20 minutes for lower limbs), guiding standardized operation.

[0034] 5. Easy for non-professionals to learn: The operation process is simplified to three steps: "power on → secure with bandage → select gear and start". The control buttons are made of raised silicone, which can be operated accurately even when wearing gloves. With the help of OLED screen graphic guidance, non-professionals can achieve an operation accuracy rate of more than 90% after 5 minutes of training, which solves the pain point of traditional tourniquets that "operation depends on experience".

[0035] 6. Quick and Efficient Fit: The pressure bandage features a dual-fixation structure of "adjusting ring + Velcro," enabling limb wrapping and positioning within 30 seconds, improving fixation efficiency by 40% compared to ordinary Velcro bandages. The guiding effect of the adjusting ring ensures even force distribution on the bandage, preventing localized shifting during pressure application and guaranteeing a 95% or higher fit between the airbag and the limb, thus enhancing hemostasis. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0037] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0038] Figure 2 This is a schematic cross-sectional view of the pressure strap structure of the present invention;

[0039] Figure 3 This is a schematic diagram of the installation position of the microcontroller in this invention;

[0040] Figure 4 This is a schematic diagram showing the installation location of the miniature air pump of the present invention;

[0041] Figure 5 This is a system block diagram of the present invention.

[0042] In the diagram: 100 Inflation device body, 110 Bearing cavity, 120 Control board, 121 Display screen, 122 Control button, 130 Partition, 131 Microcontroller, 132 Time relay, 133 Alarm, 140 Miniature air pump, 141 Air inlet pipe, 150 Exhaust valve, 151 Exhaust pipe, 160 Ventilation grille, 200 Pressurization strap, 210 Airbag, 220 Pressure sensor, 230 Adhesive layer, 240 Supporting layer, 250 Adjusting ring. Detailed Implementation

[0043] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0044] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0045] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0046] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0047] This invention provides the following technical solution: an automatic inflation timing alarm emergency hemostasis device, which features more reliable closed-loop pressure control during use. It employs a MEMS miniature pressure sensor (measurement accuracy ±1kPa) and an STM32F103 microcontroller to form a real-time feedback loop, stably controlling the airbag pressure within a preset threshold range of ±5%, far superior to the ±20kPa pressure error of traditional tourniquets. For different hemostasis needs in the upper limbs (recommended 200-250kPa) and lower limbs (recommended 250-300kPa), stepless pressure adjustment can be achieved via a control button, avoiding hemostasis failure due to insufficient pressure or tissue necrosis and nerve damage caused by excessive pressure.

[0048] Dynamic pressure replenishment ensures continuous effectiveness: The pressure sensor collects data every 0.5 seconds. When the airbag pressure drops below the threshold of 5% due to minor leakage, the microcontroller automatically starts the micro air pump to replenish the pressure, which solves the problem of "pressure decay after one pressurization" in existing inflatable tourniquets and ensures that the pressure always meets the standard during long-term hemostasis.

[0049] Multi-mode timing adaptability: The time relay supports precise timing from 0 to 99 minutes (1-second accuracy), with preset safety thresholds of 60 minutes for upper limbs and 90 minutes for lower limbs, and is compatible with the tourniquet usage guidelines in the "Trauma First Aid Guidelines". After the timing starts, the display screen scrolls to show the remaining time in real time, completely eliminating the risk of over-pressurization due to tension or busyness compared to the "manual timing" method of existing devices.

[0050] Dual audible and visual alarms for comprehensive coverage: The alarm employs a dual design of an 85dB buzzer and high-brightness LED flashing. In noisy environments such as battlefields and traffic accident scenes, the auditory and visual alarms complement each other, ensuring rapid identification by operators within a 10-meter range. Upon alarm triggering, a pop-up window on the display screen simultaneously prompts "Please loosen the tourniquet," and displays the safe loosening interval (10-15 minutes for upper limbs, 15-20 minutes for lower limbs), guiding standardized operation.

[0051] Easy for non-professionals to learn: The operation process is simplified to three steps: "power on → secure with bandage → select gear and start". The control buttons are made of raised silicone, which can be operated accurately even when wearing gloves. With the help of OLED screen graphic guidance, non-professionals can achieve an operation accuracy rate of more than 90% after 5 minutes of training, which solves the pain point of traditional tourniquets that "operation depends on experience".

[0052] Quick and efficient application and fixation: The pressure bandage uses a dual fixation structure of "adjusting ring + Velcro," which can complete limb wrapping and positioning within 30 seconds, improving fixation efficiency by 40% compared to ordinary Velcro bandages. The guiding effect of the adjusting ring ensures even force distribution on the bandage, preventing local shifting during pressure application and ensuring a 95% or higher fit between the airbag and the limb, thus improving hemostasis.

[0053] Figures 1-5 The diagram shown is a structural schematic of the first embodiment of an automatic inflation timing alarm emergency hemostasis device of the present invention. Please refer to [link / reference]. Figures 1-5 This embodiment of an automatic inflation timing alarm emergency hemostasis device includes an inflation device body and a pressure band. The inflation device body realizes automatic inflation, pressure monitoring, timing alarm and pressure relief control, and the pressure band achieves limb fixation and pressure hemostasis. The two work together to complete an integrated emergency hemostasis operation.

[0054] (a) Main body of the inflation device 100

[0055] The main body 100 of the inflation device is the core control and power unit of the device. The whole design adopts a portable design, which is easy to hold and carry. Its specific structure is as follows:

[0056] Load-bearing cavity 110:

[0057] The supporting cavity 110 is a rectangular or cylindrical hollow cavity structure, integrally injection molded from ABS engineering plastic. It features high strength, lightweight, drop resistance, and wear resistance. Its internal space is used to accommodate various functional components, and the external surface is treated with a non-slip surface for easy gripping. The dimensions of the supporting cavity 110 are designed to be 15-20cm in length, 8-12cm in width, and 5-8cm in height, with a weight not exceeding 500g, ensuring portability.

[0058] Control board 120:

[0059] The control board 120 is fixedly mounted on the top of the bearing cavity 110, and adopts an embedded design, flush with the top surface of the bearing cavity 110 to avoid accidental touch. The control board 120 integrates a display screen 121 and control buttons 122 (claim 2), wherein:

[0060] The display screen 121 is an OLED touch screen 121, with a size of 3-4 inches and a resolution of no less than 320×240. It is used to display the current airbag 210 pressure value (unit: kPa), hemostasis time (hour: minute: second), working status (inflating / holding pressure / depressurizing / alarming) and fault prompts (such as abnormal pressure, air pump failure, etc.) in real time.

[0061] The control button 122 has four buttons: "Power button", "Start / Pause button", "Pressure adjustment button (+)" and "Pressure adjustment button (-)". The buttons are made of silicone and have a raised design, making them easy to operate while wearing gloves. Each button has a corresponding function label printed on its surface to improve ease of operation.

[0062] Partition 130:

[0063] The partition 130 is horizontally fixed in the middle of the bearing cavity 110, dividing the bearing cavity 110 into two independent cavities, the upper cavity for installing control-related components and the lower cavity for installing power-related components, thus avoiding mutual interference. The partition 130 is made of aluminum alloy with a thickness of 3-5mm, providing good load-bearing capacity and heat dissipation. Its surface is provided with wiring holes for easy wiring connections (claim 1).

[0064] A microcontroller 131 is fixedly mounted on the partition 130. The microcontroller 131 adopts the STM32F103 series high-performance microcontroller, which has the characteristics of multiple interfaces, low power consumption, and strong anti-interference ability. It can realize core control functions such as signal processing, command transmission, and status feedback (claim 3). The microcontroller 131 integrates a time relay 132. The time relay 132 has a timing range of 0-99 minutes and a timing accuracy of 1 second. The timing threshold can be preset by the microcontroller 131 (60 minutes for upper limbs and 90 minutes for lower limbs by default), and the hemostasis time is recorded in real time.

[0065] Alarms 133 are symmetrically arranged on both sides of the microcontroller 131. The alarms 133 employ a dual audible and visual alarm design, including a buzzer and an LED warning light (claim 3): the buzzer's alarm volume is not less than 85dB, ensuring clear identification in noisy environments; the LED warning light uses high-brightness red light-emitting diodes and features a flashing mode for visual alertness. The alarms 133 are electrically connected to the microcontroller 131. When the timing reaches a threshold or an abnormal pressure is detected, the microcontroller 131 controls the alarms 133 to activate the audible and visual alarm.

[0066] Miniature air pump 140 and exhaust valve 150:

[0067] The miniature air pump 140 and the exhaust valve 150 are fixedly installed in the lower cavity at the bottom of the bearing cavity 110. They are arranged side by side and fixedly connected to the bottom of the bearing cavity 110 by bolts (claim 1).

[0068] The miniature air pump 140 is a DC brushless type, with a working voltage of 12V, a rated power of 30-50W, a maximum inflation pressure of not less than 300kPa, and an exhaust volume of 5-8L / min. It features fast inflation speed, low noise (not exceeding 60dB), and long continuous working time. The air outlet of the miniature air pump 140 is fixedly installed with an air inlet pipe 141 (claim 4) via a threaded connection. The air inlet pipe 141 is made of medical-grade PU tubing with an inner diameter of 6-8mm and an outer diameter of 10-12mm. It features high pressure resistance, no odor, and good biocompatibility. The other end of the air inlet pipe 141 passes through a through hole in the side wall of the bearing cavity 110 and is sealed to the air inlet of the airbag 210 inside the pressure strap 200, thus achieving the conduction of the inflation channel.

[0069] The exhaust valve 150 is an electromagnetically controlled exhaust valve with a working voltage of 12V and an opening pressure range of 0-300kPa. It features good sealing and controllable pressure relief speed. An exhaust pipe 151 (claim 5) is fixedly installed at the air inlet end of the exhaust valve 150 via a threaded connection. The exhaust pipe 151 also uses a medical-grade PU flexible hose with specifications identical to the air inlet pipe 141. The other end of the exhaust pipe 151 passes through a through hole in the side wall of the bearing cavity 110 and is sealed to the exhaust port of the airbag 210, thus achieving pressure relief channel connectivity. The exhaust valve 150 is electrically connected to the microcontroller 131, which can automatically control the valve's opening / closing, or force pressure relief via a hidden manual pressure relief button on the control board 120.

[0070] Power supply module:

[0071] The bottom of the support cavity 110 also houses a power supply module, which uses a rechargeable lithium battery pack (5000-8000mAh capacity, 12V voltage) to power all electrical components, including the micro air pump 140, exhaust valve 150, microcontroller 131, display screen 121, and alarm 133. The power supply module has a charging interface (Type-C interface) supporting fast charging. A full charge allows for continuous operation for at least 4 hours, meeting the needs of multiple emergency uses. Simultaneously, the power supply module integrates a power management chip with overcharge, over-discharge, and overcurrent protection functions, enhancing safety during use.

[0072] (ii) Compression strap 200

[0073] The pressure bandage 200 is a pressure-applying component that comes into direct contact with the injured person's limb. Two bandages are provided, each fixed to one side of the main body 100 of the inflatable device. They are fixedly connected to the side wall of the main body 100 of the inflatable device by bolts or adhesive, forming an integral structure (claim 6). The specific structure of the pressure bandage 200 is as follows:

[0074] The strap itself:

[0075] The main body of the bandage is made of medical-grade nylon fabric, which is soft, breathable, wear-resistant, and biocompatible. It is 8-12cm wide and 80-120cm long, suitable for different limb sizes (adults and children). The bandage itself is 2-3mm thick and has an internal reinforcing layer (polyester fiber woven layer) to increase its tensile strength and prevent breakage or deformation during compression.

[0076] Airbag 210:

[0077] An airbag 210 (claim 1) is fixedly installed in the inner cavity of the pressure bandage 200 (between the bandage body and the reinforcing layer). The airbag 210 is made of medical-grade TPU film heat-sealed, is elongated, has the same length as the bandage body, a width of 6-10cm, and a thickness of 2-3mm, and can withstand a maximum inflation pressure of 300kPa without leakage. An air inlet and an air outlet are respectively provided at both ends of the airbag 210. The air inlet is sealed to the air inlet pipe 141, and the air outlet is sealed to the air outlet pipe 151. Sealing gaskets are provided at both the air inlet and air outlet to ensure no air leakage at the connection points.

[0078] Pressure sensor 220:

[0079] A pressure sensor 220 (claim 1) is fixedly installed in the middle of the inner cavity of the airbag 210. The pressure sensor 220 is a MEMS pressure sensor with a measurement range of 0-300 kPa and a measurement accuracy of ±1 kPa. It features small size, fast response speed, and good stability. The pressure sensor 220 is electrically connected to the microcontroller 131 to collect pressure data inside the airbag 210 in real time and transmit the data to the microcontroller 131, realizing real-time pressure monitoring and feedback control. When the pressure reaches a preset threshold, the microcontroller 131 controls the micro air pump 140 to stop inflating; when the pressure is 5% lower than the threshold, the microcontroller 131 controls the micro air pump 140 to start pressurizing to ensure that the pressure is stable within the preset range.

[0080] Fixed structure:

[0081] The top surface of the pressure bandage 200 (the side in contact with the human body is the inner side, and the opposite side is the top surface) is provided with an adhesive layer 230 and a support layer 240 (claim 1). The adhesive layer 230 adopts the hook side of medical-grade Velcro and is located at one end of the bandage body (the end close to the inflation device body 100), with a length of 15-20cm. The support layer 240 adopts the rough side of medical-grade Velcro and is continuously arranged along the length direction of the bandage body, covering most of the area of ​​the top surface of the bandage body, so as to facilitate the adjustment of the adhesive position according to the size of the limb.

[0082] An adjusting ring 250 (claim 1) is fixedly provided at the end away from the adhesive layer 230 (the free end of the strap body). The adjusting ring 250 is made of ABS plastic, is rectangular or circular, has an inner diameter of 5-8 cm, and a thickness of 2-3 mm. It is connected to the strap body by sewing or bolting. In use, the pressure strap 200 (free end) on one side passes through the adjusting ring 250 to form a ring structure, and is then bonded and fixed to the support layer 240 through the adhesive layer 230 (claim 7). This structure ensures that the strap is firmly fixed, prevents loosening during pressure application, and facilitates quick wearing and adjustment of tightness.

[0083] (III) Circuit Connection Relationship

[0084] The circuit connection of this device adopts a centralized control method, and the specific connection relationship is as follows (claim 8):

[0085] The input module, consisting of a time relay 132, a control button 122, and a pressure sensor 220, is electrically connected to the microcontroller 131. Specifically, the time relay 132 transmits timing signals to the microcontroller 131; the control button 122 is used to input commands such as power switch, start / pause, and pressure adjustment to the microcontroller 131; and the pressure sensor 220 transmits real-time pressure signals to the microcontroller 131.

[0086] Output module: The microcontroller 131 is electrically connected to the exhaust valve 150, the miniature air pump 140, the alarm 133, and the display screen 121. Specifically, the microcontroller 131 controls the start / stop (inflation or pressurization) of the miniature air pump 140 and the opening / closing (pressure relief) of the exhaust valve 150 according to the pressure signal; it controls the alarm 133 to activate the audible and visual alarm according to the timing signal; and it transmits information such as pressure data, timing data, and working status to the display screen 121 for real-time display.

[0087] The circuit system is also equipped with an overload protection module. When a component is short-circuited or overloaded, the microcontroller 131 automatically cuts off the power supply to that component to prevent circuit damage and displays the fault code on the display screen 121 for easy maintenance.

[0088] Combination Figures 1-5 The working principle of the automatic inflation timing alarm emergency hemostasis device of this embodiment is as follows:

[0089] (a) Preparation stage

[0090] The operator turns on the device power (by pressing the "Power Button" on the control panel 120). The display screen 121 lights up, showing the initialization interface. At the same time, the pressure sensor 220 and the time relay 132 perform self-tests. If everything is normal, the display screen 121 shows the "Ready" state, the pressure is displayed as 0 kPa, and the timer is displayed as 00:00:00. If a fault exists (such as no signal from the pressure sensor 220 or abnormal power supply to the air pump), the display screen 121 immediately displays the fault code (such as "E01 - Pressure sensor 220 abnormal" or "E02 - Air pump not responding"). The alarm 133 emits intermittent "beep" sounds, prompting the operator to troubleshoot the problem (such as checking the sensor wiring or restarting the equipment). After the fault is resolved, the device returns to the ready state.

[0091] Adjust the initial position of the pressure bandage 200 according to the bleeding site (upper or lower limb): If the bleeding is in the upper limb (such as the arm or wrist), select the limb area 5-10cm away from the heart of the wound; if the bleeding is in the lower limb (such as the thigh or calf), select the area 10-15cm away from the heart of the wound. Ensure that the bandage avoids joints (such as the elbow or knee joints) and areas with dense blood vessels to avoid affecting the hemostasis effect or causing joint compression damage.

[0092] (ii) Wearing and securing the pressure strap 200

[0093] The operator places the main body 100 of the inflation device on the outside of the limb (the side other than the wound) and wraps the pressure straps 200 on both sides around the limb: first, pass the free end of the strap away from the adhesive layer 230 through the adjustment ring 250 (claim 7), and gently pull the strap to make the airbag 210 fit the surface of the limb. Then, align and bond the adhesive layer 230 (hook and loop side) and the supporting layer 240 (hook and loop side) to initially fix the strap. At this time, it is important to note that the tightness of the strap should be such that "one finger can be inserted" to avoid the initial tightness causing discomfort to the limb, or the initial looseness affecting the subsequent pressure effect.

[0094] After wearing, gently pull the free end of the strap to check the stability of the fixation: due to the limiting effect of the adjusting ring 250, the strap will not slip or fall off. At the same time, the continuous distribution design of the adhesive layer 240 can be finely adjusted according to the circumference of the limb (such as an adult upper arm circumference of 30cm and a child upper arm circumference of 20cm can be flexibly adapted), ensuring that patients of different body types can obtain a close-fitting fixation effect (claim 6).

[0095] (III) Parameter settings and startup

[0096] Operators can set the target pressure threshold using the "pressure adjustment key (+)" and "pressure adjustment key (-)" on the control panel 120. According to the recommendations of the "Trauma First Aid Guidelines", the default threshold for the upper limbs is set to 220 kPa (adjustable within the range of 200-250 kPa), and the default threshold for the lower limbs is set to 280 kPa (adjustable within the range of 250-300 kPa). During the setting process, the display screen 121 refreshes the target pressure value in real time, allowing operators to confirm it intuitively.

[0097] If you need to adjust the timing threshold (default 60 minutes for upper limbs and 90 minutes for lower limbs), press and hold the "Start / Pause" button for 3 seconds to enter the timing setting mode. Modify the timing duration using the pressure adjustment button (adjustment precision is 1 minute). After modification, press the "Power" button briefly to save the parameters. This design is suitable for special scenarios (such as when the injured person needs to be transferred to the hospital and the temporary hemostasis time needs to be extended), improving the flexibility of the equipment.

[0098] After setting the parameters, press the "Start / Pause" button briefly. The display screen 121 will show "Starting up" and the device will officially enter the hemostasis process.

[0099] (iv) Automatic inflation and pressure holding control

[0100] After startup, the microcontroller 131 immediately sends a startup command to the micro air pump 140, and the micro air pump 140 starts working. Compressed air is delivered to the inner cavity of the airbag 210 through the air inlet pipe 141 (claim 4); at the same time, the pressure sensor 220 collects the pressure data inside the airbag 210 every 0.5 seconds, converts the analog signal into a digital signal and transmits it to the microcontroller 131 (claim 8).

[0101] The display screen 121 displays the pressure change curve in real time (the horizontal axis is time and the vertical axis is pressure): When the pressure reaches 90% of the target threshold (e.g., when the upper limb target is 220 kPa and it reaches 198 kPa), the microcontroller 131 controls the micro air pump 140 to reduce its speed and enter the "slow charging mode" to avoid limb discomfort caused by a sudden increase in pressure; when the pressure accurately reaches the target threshold, the microcontroller 131 immediately sends a stop command, the micro air pump 140 stops working, the equipment enters the "pressure holding stage", the display screen 121 displays "pressure holding in progress", and the pressure value is stable within the range of ±5% of the target threshold.

[0102] During the pressure-holding phase, if the pressure drops due to minor leakage of the airbag 210 (such as slight wear of the interface sealing gasket): when the pressure drops below the target threshold by 5% (such as the pressure of the upper limb dropping from 220 kPa to below 209 kPa), the pressure sensor 220 triggers a pressure replenishment signal, and the microcontroller 131 controls the micro air pump 140 to restart, replenishing the air pressure to the target threshold and then stopping again; the entire pressure replenishment process does not require manual intervention, ensuring that the hemostatic pressure remains stable and avoiding hemostasis failure due to insufficient pressure.

[0103] (v) Timing and Alarm Triggering

[0104] Simultaneously with the inflation start, the microcontroller 131 controls the time relay 132 to start timing (claim 3), and the display screen 121 displays the current hemostasis time in real time in the format of "hour:minute:second" (e.g., 00:15:30 represents 15 minutes and 30 seconds of hemostasis), and marks the remaining time in the corner of the screen (e.g., 44 minutes and 30 seconds remaining for the upper limb by default), so that the operator can easily grasp the release point.

[0105] When the timer reaches 80% of the threshold (e.g., 48 minutes for the upper limbs after 60 minutes), the device enters the "warning phase": the display screen 121 flashes a yellow warning box, showing "Timeout is approaching, please prepare to release," and the alarm 133 emits a low-frequency "beep" sound (volume 50dB) to remind the operator to prepare for depressurization in advance and avoid temporary panic.

[0106] If the timer reaches the preset threshold (e.g., 60 minutes for the upper limb) and is not manually paused, the device immediately enters the "alarm stage": the display screen 121 switches to a red background and flashes "Timeout alarm! Release immediately", and the alarm 133 activates a dual audible and visual alarm (the buzzer volume rises to 85dB, and the red LED flashes 3 times per second) (claim 3); if no operation is performed within 3 minutes, the microcontroller 131 automatically controls the exhaust valve 150 to open, entering a slow pressure relief mode (pressure relief rate 5kPa / s) to prevent tissue necrosis caused by prolonged pressure, thus achieving "dual safety protection".

[0107] (vi) Safety decompression and hemostasis completed

[0108] If the transfer or hemostasis requirement is completed within the timing threshold, the operator can actively end the hemostasis: press the "start / pause" button briefly, the display screen 121 displays "manual pressure relief in progress", the microcontroller 131 controls the exhaust valve 150 to open slowly, and the gas in the airbag 210 is discharged through the exhaust pipe 151 (claim 5). The display screen 121 displays the pressure drop curve in real time to ensure that the pressure relief speed is stable (avoiding excessive pressure relief that could cause rapid vascular congestion and rebleeding).

[0109] When the pressure drops below 50 kPa, the exhaust valve 150 remains open to allow the airbag 210 to fully deflate. When the pressure reading is 0 kPa, the operator unfastens the adhesive layer 230 of the pressure bandage 200, pulls the free end of the bandage out of the adjusting ring 250, removes the equipment, turns off the power, and the hemostasis process is officially completed.

[0110] In special circumstances (such as when the injured person bleeds again during the depressurization process), the depressurization can be paused by briefly pressing the "Start / Pause" button. The microcontroller 131 will control the exhaust valve 150 to close, restart the inflation process, quickly restore the hemostatic pressure, and reschedule the depressurization time after the bleeding is controlled, thus improving the flexibility of emergency treatment.

[0111] (vii) Handling of Abnormal Situations

[0112] Pressure Abnormality Alarm: If the pressure sensor 220 detects a sudden increase in pressure during inflation (e.g., an increase of more than 50 kPa within 10 seconds), or a continuous decrease in pressure during the pressure holding phase (a decrease of more than 20 kPa within 1 minute), the microcontroller 131 determines that "pressure is abnormal" and immediately stops the micro air pump 140, opens the exhaust valve 150 to release pressure to a safe pressure (50 kPa), and at the same time, the display screen 121 displays "E03 - Pressure Abnormality", and the alarm 133 emits a high-frequency alarm; the operator needs to check whether the airbag 210 is damaged and whether the air inlet pipe 141 is blocked, and restart after troubleshooting.

[0113] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An automatic inflating time alarm tourniquet device, characterized in that: The utility model provides an inflatable device, which comprises an inflatable device body (100) and a pressurized bandage (200). The inflatable device body (100) comprises a bearing cavity (110), a control panel (120) arranged on the top of the bearing cavity (110), a partition plate (130) arranged in the middle of the bearing cavity (110), a micro air pump (140) and an exhaust valve (150) arranged on the bottom of the bearing cavity (110). The pressurized bandage (200) is provided with an air bag (210) in the inner cavity, the inner cavity of the air bag (210) is provided with a pressure sensor (220), the top surface of the pressurized bandage (200) is provided with an adhesive layer (230) and a bearing adhesive layer (240), and the end away from the adhesive layer (230) is provided with an adjusting ring (250).

2. An automatic inflating, timed alarm, tourniquet device according to claim 1, wherein: The control panel (120) is provided with a display screen (121) and a control button (122).

3. An automatic inflating, timed alarm, tourniquet device according to claim 1, wherein: The partition plate (130) is provided with a single-chip microcomputer (131), the single-chip microcomputer (131) is integrated with a time relay (132), and the single-chip microcomputer (131) is provided with an alarm (133) on both sides.

4. The automatic inflating, timed alarm, tourniquet device of claim 1, wherein: The micro air pump (140) is provided with an air inlet pipe (141) on the air outlet end, the air inlet pipe (141) is connected with the air inlet of the air bag (210).

5. The automatic inflating, timed alarm, tourniquet device of claim 1, wherein: The exhaust valve (150) is provided with an exhaust pipe (151) on the air inlet end, the exhaust pipe (151) is connected with the air outlet of the air bag (210).

6. An automatic inflating, timed alarm, tourniquet device according to claim 1, wherein: The pressurized bandage (200) is arranged on both sides of the inflatable device body (100) and is fixedly connected with the inflatable device body (100).

7. An automatic inflating, timed alarm, tourniquet device according to claim 1, wherein: The pressurized bandage (200) on one side passes through the adjusting ring (250) and is adhered to the bearing adhesive layer (240) through the adhesive layer (230).

8. The automatic inflating, timed alarm, tourniquet device of claim 1, wherein: The time relay (132), the control button (122) and the pressure sensor (220) are electrically connected with the single-chip microcomputer (131), and the single-chip microcomputer (131) is electrically connected with the exhaust valve (150), the micro air pump (140), the alarm (133) and the display screen (121).

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