Pressure-adjustable air bag rib fracture external fixing device

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a pressure-adjustable air bag rib fracture external fixing device which comprises a first lining plate and a second lining plate, the upper end and one side of the first lining plate are each provided with a plurality of lock catch belts, and the other side of the first lining plate is fixedly provided with a plurality of connecting belts; the lock catch belt and the second lining plate are connected with each other, and the connecting belt and the second lining plate are connected with each other. Through cooperation of the first air bag in the expanded state and the pressurizing assemblies in the initial states, the thoracic cavity part of a patient can be subjected to small-amplitude overall extrusion, so that the overall fluctuation degree of the thoracic cavity part of the patient is limited; the fracture part can be locally pressurized through the second air bag in the expanded state, secondary displacement of the fracture broken end caused by breathing movement is effectively avoided, and the fixing effect of the fracture part and the comfort degree of a patient in the breathing process are both considered.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to an adjustable pressure airbag external fixation device for rib fractures. Background Technology

[0002] Rib fractures are a common chest injury, accounting for up to 90% of all thoracic fractures. Multiple rib fractures, especially those in multiple locations, can easily lead to serious complications such as flail chest and respiratory distress, endangering the patient's life. To promote fracture healing, alleviate pain, and reduce the risk of complications, external fixation devices have become an important adjunct in clinical treatment. Compared to traditional rigid splints, pneumatic rib fracture external fixation devices, with their ability to adaptively conform to the patient's chest contour, effectively solve the problems of poor fit and local pressure injury associated with rigid splints. They also offer advantages such as ease of operation and convenient postoperative care, and are gradually becoming more widely used in clinical practice.

[0003] However, existing pneumatic external fixation devices for rib fractures still have key technical defects, making it difficult to balance fixation effectiveness and breathing comfort. The internal pressure of the air bladder in such devices is uniformly distributed, making it impossible to achieve differentiated pressure adjustment for the fracture site and the healthy chest area, creating an inherent contradiction: when the internal pressure of the air bladder is adjusted to a lower level, although it can reduce the restriction on breathing, it is not enough to form a reliable limiting fixation for the fracture ends. The physiological rise and fall of the chest cavity during breathing will still cause displacement of the fracture site, affecting the healing effect and aggravating pain. When the internal pressure of the air bladder is increased to enhance the fixation effect, the uniformly distributed high pressure will significantly restrict the rise and fall movement of the entire chest cavity, which not only seriously affects the patient's normal respiratory function, but may also induce secondary complications such as lung infection and atelectasis, especially for elderly patients and patients with underlying lung diseases.

[0004] In summary, existing pneumatic rib fracture external fixation devices cannot balance the core requirements of fracture fixation stability and breathing comfort due to the uniform and non-differentiated pressure, thus restricting the further improvement of their clinical application. Therefore, developing a pneumatic rib fracture external fixation device that can precisely adjust the pressure distribution and take into account both fixation reliability and safety of use, to solve the inherent pain points of existing technologies and meet the needs of personalized clinical treatment, has become an urgent technical problem to be solved in the field of thoracic surgical medical devices. Summary of the Invention

[0005] The purpose of this invention is to provide an adjustable pressure airbag external fixation device for rib fractures. By cooperating with an inflated first airbag and multiple pressurizing components in their initial states, it can perform small-amplitude overall compression on the patient's chest cavity to limit the overall fluctuation of the chest cavity. By injecting gas into the pressurizing component corresponding to the fracture site, the inflated second airbag can locally pressurize the fracture site, effectively preventing secondary displacement of the fracture ends due to respiratory movements, thus balancing the fixation effect of the fracture site with the patient's comfort during breathing.

[0006] The specific technical solution adopted by this invention is as follows: An adjustable-pressure pneumatic rib fracture external fixation device includes a first liner and a second liner. Multiple locking straps are fitted to the upper end and one side of the first liner, and multiple connecting straps are fixed to the other side of the first liner. The locking straps and the second liner, as well as the connecting straps and the second liner, are interconnected. The first liner and the second liner, through the cooperation of the multiple locking straps and the multiple connecting straps, form a vest-like wearable structure. The device also includes: The first airbag is fixed to one end of the second liner plate near the first liner plate. The first airbag has multiple partition membrane layers inside, which separate multiple first air chambers and multiple second air chambers. The multiple first air chambers and multiple second air chambers are alternately distributed. The partition membrane layers have multiple connecting holes inside, which are evenly distributed in the vertical direction. Adjacent first air chambers and second air chambers are interconnected through the connecting holes. A pressurization groove is formed between the second air chamber and two adjacent first air chambers. Multiple pressurization components are respectively assembled inside multiple pressurization grooves, and the pressurization components are capable of changing between an initial state and an expanded state; Multiple pressure regulating valve assemblies are respectively assembled between the first airbag and the pressurizing assembly, and the multiple pressure regulating valve assemblies are adapted to the multiple pressurizing assemblies one by one. The pressure regulating valve assembly is configured to control the flow rate of the medium flowing to the corresponding pressurizing assembly, and can also release the medium inside the corresponding pressurizing assembly. The pressure regulating valve assembly can switch between pressurizing state, pressure holding state and pressure relief state. When the first airbag is inflated and at least one pressurizing component is inflated, the pressurizing component in the inflated state can locally pressurize the thoracic cavity.

[0007] In a preferred embodiment, when the first airbag is inflated and the multiple pressurizing components are in their initial state, the outer wall of the first airbag and the multiple pressurizing components near the first liner forms a smooth curved surface, which can apply pressure evenly to the entire thoracic cavity.

[0008] In a preferred embodiment, the pressurization assembly includes a second airbag and a pressure equalization support element. The second airbag is fixed inside the pressurization groove, and the pressure equalization support element is fixed inside the second airbag. When the second airbag is in its initial state, the pressure equalization support element is in a compressed state; when the second airbag is in an inflated state, the pressure equalization support element is in a stretched state.

[0009] In a preferred embodiment, a first base plate and a second base plate are respectively provided on both sides of the pressure equalization support element. The first base plate and the second base plate are respectively fixed to both sides inside the second airbag. A plurality of corrugated support plates are integrally formed between the first base plate and the second base plate. The plurality of corrugated support plates are respectively located at the upper end and the lower end between the first base plate and the second base plate. The first base plate, the second base plate and the plurality of corrugated support plates constitute an elastic support structure.

[0010] In a preferred embodiment, the pressure equalizing support element is made of any one of the following materials: TPU, TPE, PP, and the first and second airbags are both made of any one of the following materials: nylon / polyethylene composite film, biaxially oriented polypropylene / polyethylene composite film, polyester / polyethylene composite film.

[0011] In a preferred embodiment, the pressure regulating valve assembly includes a valve body fixed between corresponding second air chambers and second air bladders. The input end of the valve body passes through one side of the second air bladder and extends into the interior of the second air chamber. The output end of the valve body passes through the other side of the second air bladder and extends into the exterior of the second air bladder. An airtight chamber is formed at one end of the valve body inside the second air chamber. An air outlet is formed at the outside of the valve body inside the second air bladder. The interior of the valve body and the second air bladder are interconnected through the air outlet. A limiting base is fixed inside the airtight chamber. A helical spring is fitted at one end of the outer side of the limiting base. A valve ball is fitted at one end of the helical spring. In the initial state, the valve ball can block the input end of the valve body.

[0012] In a preferred embodiment, a drive handle is rotatably connected to the end of the valve body furthest from the second air chamber via a ball bearing. A transmission rod is threaded into the drive handle. A first sleeve and a second sleeve are fixed to the outer side of the transmission rod. A first sealing block is fixed to the outer side of the first sleeve, and a second sealing block is fixed to the outer side of the second sleeve. The first sealing block and the valve body, as well as the second sealing block and the valve body, are slidably connected. When both the first and second sealing blocks are located at the end of the air outlet furthest from the second air chamber, the pressure regulating valve assembly is in a pressurizing state. When the first and second sealing blocks are located at opposite ends of the air outlet, the pressure regulating valve assembly is in a pressure-holding state. When both the first and second sealing blocks are located at the end of the air outlet closest to the second air chamber, the pressure regulating valve assembly is in a depressurizing state.

[0013] In a preferred embodiment, anti-rotation surfaces are provided at the upper and lower ends of the outer sides of the first and second sealing blocks, and chamfered surfaces are provided at the upper and lower ends of the valve body, with the multiple anti-rotation surfaces and multiple chamfered surfaces being adapted one-to-one.

[0014] In a preferred embodiment, a plurality of exhaust grooves are provided on the outer side of the valve body and inside the valve body, and the plurality of exhaust grooves are arranged in a ring array on the outer side of the drive handle. When the drive handle is in a depressurized state, the second airbag and the outside of the device are interconnected through the exhaust grooves.

[0015] In a preferred embodiment, the first sealing block and the second sealing block are made of any one of the following materials: silicone rubber, halogenated butyl rubber, isoprene rubber, PTFE, or PEEK.

[0016] In a preferred embodiment, the drive handle is made of any one of the following materials: PC, PP, PVC, or other transparent materials.

[0017] In a preferred embodiment, the outer side of the drive handle is provided with scale markings, wherein when the scale markings are aligned with the end of the transmission rod, the pressure regulating valve assembly is in a pressure-holding state.

[0018] The technical effects achieved by this invention are as follows: This invention, through the cooperation of an inflated first airbag and multiple pressurizing components in their initial states, can perform small-amplitude overall compression on the patient's chest cavity to limit the overall fluctuation of the chest cavity. By injecting gas into the pressurizing component corresponding to the fracture site, the inflated second airbag can locally pressurize the fracture site, effectively preventing secondary displacement of the fracture ends due to respiratory movements, thus balancing the fixation effect of the fracture site with the patient's comfort during breathing. The present invention utilizes an elastic support structure composed of a first base plate, a second base plate, and multiple corrugated support plates to further enhance the structural stability of the pressure equalization support element during tension and compression. This ensures that the second airbag maintains consistent shape during repeated inflation and deflation, enabling the second airbag to provide stable and precise pressure output when applying localized pressure to the fracture site. This avoids pressure fluctuations at the fracture site, thereby ensuring the continuous and effective fixation of the fracture site by the inflated second airbag. Simultaneously, this elastic support structure also provides repositioning assistance when the second airbag depressurizes and contracts. This invention achieves precise switching between three states—pressurization, pressure holding, and pressure release—of the pressure regulating valve assembly through the coordinated action of the drive handle, transmission rod, first sleeve, second sleeve, first sealing block, and second sealing block. This allows the device to flexibly adjust the pressure inside the second airbag according to usage requirements, meeting the personalized pressure needs of different patients or different treatment stages of the same patient at the fracture site. When pressurization of the second airbag is required, rotating the drive handle moves the transmission rod, positioning both the first and second sealing blocks at the end furthest from the air outlet from the second air chamber. At this time, the medium inside the second air chamber can sequentially pass through the airtight chamber, the limiting base, and... The helical spring and valve ball enter the valve body and flow into the second air chamber through the vent, thus expanding and pressurizing the second air chamber. When it is necessary to maintain the internal pressure of the second air chamber, the drive handle is rotated to position the first and second sealing blocks at opposite ends of the vent, thereby blocking the inflow and outflow of the medium and maintaining the pressure. When it is necessary to reduce the internal pressure of the second air chamber, the drive handle is rotated in the opposite direction, causing the first and second sealing blocks to be positioned at the end of the vent closer to the second air chamber. At this time, the medium inside the second air chamber enters the valve body through the vent and is discharged to the outside of the device through the exhaust groove, thus achieving pressure relief. The operation is convenient and the adjustment accuracy is high. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a rear view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the structure of the first airbag and the pressurization component of the present invention; Figure 4 This is a partial structural cross-sectional view of the first airbag and pressurization assembly of the present invention; Figure 5 This is a schematic diagram of the structure of the first airbag of the present invention; Figure 6 This is a schematic diagram of the internal structure of the first airbag of the present invention; Figure 7 This is a schematic diagram of the supercharging component of the present invention; Figure 8 This is an exploded view of the supercharging component of the present invention; Figure 9 This is a schematic diagram of the pressure regulating valve assembly of the present invention; Figure 10 This is an exploded view of the pressure regulating valve assembly of the present invention; Figure 11 This is a structural cross-sectional view of the pressure regulating valve assembly of the present invention; Figure 12 This is a schematic diagram of the pressure regulating valve assembly of the present invention in different states.

[0020] The attached diagram lists the components represented by each number as follows: 100. First liner; 101. Second liner; 102. Locking strap; 103. Connecting strap; 200. First airbag; 201. First air chamber; 202. Second air chamber; 203. Connecting hole; 204. Pressurization groove; 300. Boosting components; 301. Second airbag; 302. Pressure equalization support element; 303. First base plate; 304. Second base plate; 305. Corrugated support plate; 400. Pressure regulating valve assembly; 401. Valve body; 402. Airtight chamber; 403. Air outlet; 404. Limiting base; 405. Helical spring; 406. Valve ball; 410. Drive handle; 411. Transmission rod; 412. First sleeve; 413. Second sleeve; 414. First sealing block; 415. Second sealing block; 416. Exhaust groove. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0024] 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.

[0025] Please see the appendix Figures 1 to 6 As shown, this is the first embodiment of the present invention. This embodiment provides an adjustable pressure pneumatic rib fracture external fixation device, including a first liner 100 and a second liner 101. Multiple locking straps 102 are fitted to the upper end and one side of the first liner 100, and multiple connecting straps 103 are fixed to the other side of the first liner 100. The locking straps 102 and the second liner 101, as well as the connecting straps 103 and the second liner 101, are interconnected. The first liner 100 and the second liner 101, through the cooperation of the multiple locking straps 102 and the multiple connecting straps 103, constitute a vest-like wearable structure. The device also includes: The first airbag 200 is fixed to one end of the second liner 101 near the first liner 100. The first airbag 200 has multiple partition membrane layers inside, which separate multiple first air chambers 201 and multiple second air chambers 202. The multiple first air chambers 201 and multiple second air chambers 202 are alternately distributed. Multiple connecting holes 203 are opened inside the partition membrane layers and are evenly distributed in the vertical direction. Adjacent first air chambers 201 and second air chambers 202 are interconnected through the connecting holes 203. A pressurizing groove 204 is formed between the second air chamber 202 and two adjacent first air chambers 201. Multiple booster components 300 are respectively assembled inside multiple booster grooves 204, and the booster components 300 can switch between an initial state and an expansion state; Multiple pressure regulating valve assemblies 400 are respectively assembled between the first airbag 200 and the pressurizing assembly 300, and the multiple pressure regulating valve assemblies 400 and the multiple pressurizing assemblies 300 are adapted to each other. The pressure regulating valve assembly 400 is configured to control the flow rate of the medium flowing to the corresponding pressurizing assembly 300, and can also release the medium inside the corresponding pressurizing assembly 300. The pressure regulating valve assembly 400 can switch between pressurizing state, pressure holding state and pressure relief state. When the first airbag 200 is inflated and at least one pressurizing component 300 is inflated, the pressurizing component 300 in the inflated state can locally pressurize the thoracic cavity.

[0026] Here, when the pressure regulating valve assembly 400 is in the pressurization state, the gas inside the first airbag 200 can flow into the corresponding pressurization assembly 300 through the pressure regulating valve assembly 400, and the gas pressure inside the pressurization assembly 300 can gradually increase. At this time, the pressurization assembly 300 changes from the initial state to the expansion state. When the pressure regulating valve assembly 400 is in the pressure holding state, the gas pressure inside the pressurization assembly 300 is in a constant state. When the pressure regulating valve assembly 400 is in the pressure relief state, the gas medium inside the pressurization assembly 300 can be released to the outside of the device, and the gas pressure inside the pressurization assembly 300 can gradually decrease. At this time, the pressurization assembly 300 changes from the expansion state to the initial state.

[0027] It should be noted that an inflation nozzle is fixed to the bottom of the first air chamber 201 at the lowest end. The lower end of the inflation nozzle can be detachably and fixedly connected to the inflation device. Activating the inflation device can inject gas medium into the first airbag 200, causing the first airbag 200 to change from its initial state to an inflated state. The inflation nozzle can be any of the following types: embedded nozzle, flip-top nozzle; the inflation device can be any of the following types: electric air pump, manual pressurized airbag. In this embodiment, the inflation nozzle is preferably an embedded nozzle, and the inflation device is preferably a manual pressurized airbag. Specifically, the embedded nozzle has both inflation and deflation functions, and its specific structure can be referred to as the nozzle structure on a swimming ring. Further details will not be provided here.

[0028] Furthermore, when the device is not worn, the first airbag 200 and the pressurization component 300 are both in their initial state. At this time, no gas medium is injected into the first airbag 200 and the pressurization component 300, and the pressure regulating valve component 400 is in a pressure-holding state.

[0029] Specifically, in this application, there are multiple pressurizing components 300 and pressure regulating valve components 400. In order to better illustrate the working principle of this device, unless otherwise specified, the operating pressurizing components 300 and pressure regulating valve components 400 are assumed to correspond to the fracture site, and the operating pressurizing components 300 and pressure regulating valve components 400 correspond to each other.

[0030] In this embodiment, when performing external fixation on a patient with a rib fracture (hereinafter referred to as the patient), a vest-style wearable structure is worn on the outer side of the upper body through the cooperation of multiple buckle straps 102, with the first airbag 200 fitting snugly against the chest cavity. Gas is injected into the first air chamber 201 via a manually pressurized airbag. Since adjacent first air chambers 201 and second air chambers 202 are interconnected through connecting holes 203, the first airbag 200 changes from its initial state to an inflated state as the amount of gas injected increases. The inflated first airbag 200 provides a small-amplitude overall compression to the patient's chest cavity, limiting the overall rise and fall of the chest cavity. Depending on the location of the fracture, the pressure regulating valve assembly 400 is activated, changing the pressure regulating valve assembly 400 corresponding to the fracture site from a pressure-holding state to a pressure-increasing state, continuing to inject gas into the first airbag 200. The gas can be adjusted through the pressure in the pressure-increasing state. The valve assembly 400 flows into the pressure boosting assembly 300, which applies local pressure to the fracture site to increase the restraint range of the device. Through the cooperation of the first airbag 200, the pressure boosting assembly 300, and the pressure regulating valve assembly 400, coordinated control of overall chest cavity pressure and local pressure boosting is achieved. That is, the overall expansion of the first airbag 200 can slightly restrict the patient's chest cavity to reduce and alleviate the pressure during breathing, while the local expansion of the pressure boosting assembly 300 can precisely apply pressure to the fracture point, effectively preventing secondary displacement of the fracture ends due to respiratory movements. This balances the fixation effect of the fracture site with the patient's comfort during breathing. In addition, the vest-style wearable structure design makes the device easy to wear, and the connection method of multiple buckle straps 102 and connecting straps 103 can be adaptively adjusted according to the patient's body shape to ensure that the first airbag 200 fits tightly with the chest cavity, improving the stability and reliability of fixation.

[0031] It should be noted that the number of pressurization components 300 for local pressurization is at least one, and the specific number can be increased adaptively according to the fracture of the ribs to achieve the best fixation effect. Further details will not be elaborated here.

[0032] In a preferred embodiment, there are two first airbags 200, which are adapted to the left and right thoracic cavities, respectively.

[0033] In a preferred embodiment, when the first airbag 200 is inflated and the plurality of pressurizing components 300 are in their initial state, the first airbag 200 and the plurality of pressurizing components 300 form a smooth curved surface near the outer side wall of the first liner 100.

[0034] In this embodiment, the above-mentioned scheme ensures that when the first airbag 200 is inflated, the device can apply uniform pressure to the patient's chest cavity, avoiding uneven local pressure.

[0035] Secondly, please refer to the following as well. Figures 4 to 8 The pressurization assembly 300 includes a second airbag 301 and a pressure equalization support element 302. The second airbag 301 is fixed inside the pressurization groove 204, and the pressure equalization support element 302 is fixed inside the second airbag 301. When the second airbag 301 is in its initial state, the pressure equalization support element 302 is in its maximum compressed state. When the second airbag 301 is in its inflated state, the pressure equalization support element 302 is in its stretched state. A first base plate 303 and a second base plate 304 are respectively provided on both sides of the pressure equalization support element 302. The first base plate 303 and the second base plate 304 are respectively fixed to both sides inside the second airbag 301. A plurality of corrugated support plates 305 are integrally formed between the first base plate 303 and the second base plate 304. The plurality of corrugated support plates 305 are respectively located at the upper and lower ends between the first base plate 303 and the second base plate 304. The first base plate 303, the second base plate 304, and the plurality of corrugated support plates 305 constitute an elastic support structure.

[0036] It should be noted that the maximum compression state refers to the point where the pressure equalization support element 302 can no longer be compressed.

[0037] In this embodiment, when the first airbag 200 is inflated and all the pressurizing components 300 are in their initial state, the second airbag 301 in its initial state, supported by the pressure equalization support element 302, can work with the inflated first airbag 200 to apply uniform pressure to the patient's chest cavity. Simultaneously, the elastic support structure formed by the first base plate 303, the second base plate 304, and multiple corrugated support plates 305 further enhances the structural stability of the pressure equalization support element 302 during stretching and compression, ensuring that the second airbag 301 maintains consistent shape during repeated inflation and deflation. This allows the second airbag 301 to provide stable and precise pressure output when applying local pressure to the fracture site, preventing pressure fluctuations at the fracture site and ensuring continuous and effective fixation of the fracture site by the inflated second airbag 301. Furthermore, this elastic support structure also provides repositioning assistance when the second airbag 301 depressurizes and contracts.

[0038] In a preferred embodiment, the pressure equalizing support element 302 is made of any one of the following materials: TPU, TPE, PP, or other materials with resilience. The first airbag 200 and the second airbag 301 are both made of any one of the following materials: nylon / polyethylene composite film, biaxially oriented polypropylene / polyethylene composite film, polyester / polyethylene composite film, or other flexible and wear-resistant materials whose surface area does not change. In this embodiment, the pressure equalizing support element 302 is preferably made of TPE, and the first airbag 200 and the second airbag 301 are preferably made of biaxially oriented polypropylene / polyethylene composite film.

[0039] Please refer to it again. Figures 9 to 12 The pressure regulating valve assembly 400 includes a valve body 401, which is fixed between a corresponding second air chamber 202 and a second air bag 301. The input end of the valve body 401 passes through one side of the second air bag 301 and extends into the interior of the second air chamber 202, while the output end of the valve body 401 passes through the other side of the second air bag 301 and extends into the exterior of the second air bag 301. An airtight chamber 402 is formed at one end of the valve body 401 inside the second air chamber 202, and an air outlet 403 is formed on the outside of the valve body 401 inside the second air bag 301. The interior of the valve body 401 and the second air bag 301 are interconnected through the air outlet 403. A limiting base 404 is fixed inside the airtight chamber 402. A coil spring 405 is mounted on one end of the outer side of the limiting base 404, and a valve ball 406 is mounted on one end of the coil spring 405. In the initial state, the valve ball 406 can block the input end of the valve body 401.

[0040] It should be noted that in this embodiment, the output end of the valve body 401 refers to the end located inside the second air chamber 202, while the output end of the valve body 401 refers to the end located outside the device.

[0041] In this embodiment, when fixing the fracture site of the patient, a gas medium is injected into the first airbag 200 through an inflation device, causing the first airbag 200 to change from an initial state to an inflated state. The pressure regulating valve assembly 400 corresponding to the fracture site is rotated, changing the pressure regulating valve assembly 400 from a pressure-holding state to a pressure-increasing state, continuing to inject gas into the first airbag 200, causing the air pressure inside the first airbag 200 to continue to increase. This, in turn, pushes the valve ball 406 to move and compresses the coil spring 405, thereby releasing the blockage formed by the valve ball 406 on the input end of the valve body 401. The gas inside the first airbag 200 flows sequentially through the input end and the air outlet 403 of the valve body 401 to the second airbag 301, causing the second airbag 301 to change to an inflated state. The inflated second airbag 301 precisely increases the pressure on the patient's fracture site, improving the limiting range and limiting effect of the device on the fracture site. Based on the patient's feedback, the injection of gas into the first airbag 200 is stopped, and the pressure regulating valve assembly 400 is reversed to return to the pressure-holding state. In the pressure-holding state, the pressure regulating valve assembly 400 allows the first airbag 200 and the second airbag 301 to form two independent chambers, and the air pressure inside the first airbag 200 and the pressurizing assembly 300 remains unchanged. When it is necessary to release the gas medium inside the second airbag 301 to reduce local pressure, the pressure regulating valve assembly 400 is operated, changing from the pressure-holding state to the pressure-relieving state. The gas medium inside the second airbag 301 flows out of the device sequentially through the air outlet 403 and the output end of the valve body 401, thus reducing the pressure inside the second airbag 301. After depressurization, the pressure regulating valve assembly 400 is operated again to change from the pressure-relieving state to the pressure-holding state.

[0042] Please refer to it again. Figures 9 to 12 The end of the valve body 401 furthest from the second air chamber 202 is rotatably connected to a drive handle 410 via a ball bearing. A transmission rod 411 is threadedly connected to the inside of the drive handle 410. A first sleeve 412 and a second sleeve 413 are fixed to the outside of the transmission rod 411. A first sealing block 414 is fixed to the outside of the first sleeve 412, and a second sealing block 415 is fixed to the outside of the second sleeve 413. The first sealing block 414 and the valve body 401, as well as the second sealing block 415 and the valve body 401, are connected. All are sliding connections. When the first sealing block 414 and the second sealing block 415 are both located at the end of the vent 403 away from the second air chamber 202, the pressure regulating valve assembly 400 is in a pressurized state; when the first sealing block 414 and the second sealing block 415 are respectively located at both ends of the vent 403, the pressure regulating valve assembly 400 is in a pressure-holding state; when the first sealing block 414 and the second sealing block 415 are both located at the end of the vent 403 close to the second air chamber 202, the pressure regulating valve assembly 400 is in a pressure-relieving state.

[0043] In this embodiment, when the pressure regulating valve assembly 400 switches between a pressure holding state, a pressure boosting state, and a pressure releasing state, the drive handle 410 is rotated. Through the threaded connection between the drive handle 410 and the transmission rod 411, the drive handle 410 drives the transmission rod 411 to move. Since the transmission rod 411 and the first sleeve 412, the transmission rod 411 and the second sleeve 413, the first sleeve 412 and the first sealing block 414, and the second sleeve 413 and the second sealing block 415 are all fixedly connected, the transmission rod 411 can drive the first sleeve 412, the second sleeve 413, the first sealing block 414, and the second sealing block 415 to move synchronously. When the first sealing block 414 and the second sealing block 415 are respectively located at both ends of the vent 403, the pressure regulating valve assembly 400 is in a pressure holding state. When both the first sealing block 414 and the second sealing block 415 are located at the end of the vent 403 furthest from the second air chamber 202, the pressure regulating valve assembly 400 is in a pressure holding state. The pressure regulating valve assembly 400 is in a pressurized state. When both the first sealing block 414 and the second sealing block 415 are located at the end of the air outlet 403 near the second air chamber 202, the pressure regulating valve assembly 400 is in a depressurized state. When the pressure regulating valve assembly 400 is in a pressurized state, the gas inside the first air bladder 200 can flow into the interior of the second air bladder 301, and the inflated second air bladder 301 provides local pressure to the fracture site. When the pressure regulating valve assembly 400 is in a pressure-maintaining state, the first air bladder 200 and the second air bladder 301 are two independent chambers. When the pressure regulating valve assembly 400 is in a depressurized state, the second air bladder 301 is connected to the outside of the device, and the gas inside the pressurized assembly 300 can flow to the outside of the device. The operation is convenient and the adjustment accuracy is high, so that the device can flexibly adjust the pressure inside the second air bladder 301 according to the usage requirements, so as to meet the personalized needs of different patients or different treatment stages of the same patient for the pressure of the fracture site.

[0044] Please refer to it again. Figure 10 The upper and lower ends of the outer sides of the first sealing block 414 and the second sealing block 415 are provided with anti-rotation surfaces, and the upper and lower ends of the inner side of the valve body 401 are provided with chamfered surfaces, and the multiple anti-rotation surfaces and multiple chamfered surfaces are matched one by one.

[0045] In this embodiment, the anti-rotation surface and the chamfered surface cooperate to prevent the second sealing block 415 and the first sealing block 414 from rotating during the movement of the transmission rod 411.

[0046] Please refer to it again. Figure 10 and Figure 11Multiple exhaust grooves 416 are provided on the outside of the valve body 401 and inside the valve body 401. The multiple exhaust grooves 416 are arranged in a ring array on the outside of the drive handle 410. When the drive handle 410 is in the depressurization state, the second airbag 301 and the outside of the device are connected to each other through the exhaust grooves 416.

[0047] In this embodiment, when the pressure regulating valve assembly 400 is in a depressurized state, the gas medium inside the second airbag 301 flows to the outside of the device through the air outlet 403 and the exhaust groove 416 in sequence, thereby depressurizing the second airbag 301.

[0048] In a preferred embodiment, the first sealing block 414 and the second sealing block 415 are both made of any one of the following materials: silicone rubber, halogenated butyl rubber, isoprene rubber, PTFE, and PEEK. The drive handle 410 is made of any one of the following materials: PC, PP, PVC, or other transparent materials. In this embodiment, the first sealing block 414 and the second sealing block 415 are both made of silicone rubber, and the drive handle 410 is made of transparent PVC. The drive handle 410 has scale markings on its outer side. When the scale markings are aligned with the end of the transmission rod 411, the device is in a pressure-holding state.

[0049] In this embodiment, by providing a transparent drive handle 410, the position of the transmission rod 411 can be easily observed, thereby facilitating the determination of the status of the pressure regulating valve assembly 400.

[0050] In one specific embodiment, rotating the drive handle 410 causes the transmission rod 411 to rotate towards the first airbag 200. When the transmission rod 411 contacts the limiting base 404, the limiting base 404 can limit the transmission rod 411, and the drive handle 410 cannot continue to rotate. At this time, the device is in a depressurized state. Rotating the drive handle 410 causes the transmission rod 411 to rotate away from the first airbag 200. When the end of the transmission rod 411 and the inside of the drive handle 410 are in contact, the drive handle 410 cannot continue to rotate. At this time, the device is in a pressurized state. Rotating the drive handle 410 causes the transmission rod 411 to move until the end of the transmission rod 411 is aligned with the scale marking inside the drive handle 410. At this time, the pressure regulating valve assembly 400 is in a pressure-holding state.

[0051] The working principle of this invention is as follows: When performing external fixation on a patient with a rib fracture, a vest-like wearable structure is worn on the patient's upper body using multiple locking straps 102. The first airbag 200 fits snugly against the chest cavity. A manually operated pressurized airbag injects gas into the first air chamber 201, causing the first airbag 200 to inflate from its initial state. The inflated first airbag 200, in conjunction with the pressurizing component 300 in its initial state, provides slight overall compression to the patient's chest cavity, limiting its overall movement. Rotating the drive handle 410 corresponding to the fracture site changes the pressure regulating valve component 400 from a pressure-holding state to a pressurizing state, continuing to inject gas into the first airbag 200. The gas flows through the pressurized pressure regulating valve component 400 into the corresponding second airbag 301, causing the second airbag 301 to inflate from its initial state. The inflated second airbag 301 then provides localized pressure to the fracture site. The device applies pressure to increase the restriction range of the fracture site. The overall expansion of the first airbag 200 slightly restricts the patient's chest cavity to reduce and alleviate the pressure during breathing. The inflated second airbag 301 precisely applies pressure to the fracture point, effectively preventing secondary displacement of the fracture ends due to respiratory movements, thus balancing the fixation effect of the fracture site with the patient's comfort during breathing. When it is necessary to reduce the pressure inside the inflated second airbag 301, the drive handle 410 is turned, which drives the transmission rod 411 to move, causing the pressure regulating valve assembly 400 to change from a pressure-holding state to a pressure-relieving state. The stretched pressure equalizing support element 302 causes the second airbag 301 to contract, allowing the gas inside the second airbag 301 to flow out of the device through the air outlet 403 and the exhaust groove 416, thereby reducing the pressure inside the second airbag 301. After the pressure is reduced, the drive handle 410 is turned again, causing the pressure regulating valve assembly 400 to change from a pressure-relieving state to a pressure-holding state.

[0052] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. An adjustable pressure pneumatic rib fracture external fixation device, characterized by: The utility model relates to a chest compression device, including first lining (100) and second lining (101), the upper end and one side of first lining (100) are equipped with a plurality of lock buckle belt (102), the other side of first lining (100) is fixed with a plurality of connecting belt (103), still include: First air bag (200), first air bag (200) is fixed to second lining (101) near one end of first lining (100), the inside of first air bag (200) is provided with a plurality of separation membrane layers, the inside of first air bag (200) is separated by a plurality of separation membrane layers and has a plurality of first air chamber (201) and a plurality of second air chamber (202), and a plurality of first air chamber (201) and a plurality of second air chamber (202) are alternately distributed, a plurality of connecting holes (203) are opened in the inside of separation membrane layer, adjacent first air chamber (201) and second air chamber (202) are communicated by connecting hole (203), and the second air chamber (202) and adjacent two first air chamber (201) form pressurizing groove (204); A plurality of pressurizing assemblies (300) are respectively assembled in a plurality of pressurizing grooves (204); A plurality of pressure regulating valve assemblies (400) are respectively assembled between the first air bag (200) and the pressurizing assembly (300), and the plurality of pressure regulating valve assemblies (400) and the plurality of pressurizing assemblies (300) are one-to-one matched. When the first air bag (200) is in an inflated state and at least one pressurizing assembly (300) is in an inflated state, the pressurizing assembly (300) in the inflated state can locally pressurize the thoracic cavity.

2. An adjustable compression air bag rib fracture external fixation device according to claim 1, characterized in that: When the first air bag (200) is in an inflated state and the plurality of pressurizing assemblies (300) are all in an initial state, the first air bag (200) and the plurality of pressurizing assemblies (300) close to the outer side wall of the first lining (100) form a smooth curved surface.

3. An adjustable compression air bag rib fracture external fixation device according to claim 1, characterized in that: The pressurizing assembly (300) includes a second air bag (301) and an equalizing support element (302), the second air bag (301) is fixed in the pressurizing groove (204), and the equalizing support element (302) is fixed in the second air bag (301). When the second air bag (301) is in an initial state, the equalizing support element (302) is in a compressed state; when the second air bag (301) is in an inflated state, the equalizing support element (302) is in a stretched state.

4. An adjustable compression air bag rib fracture external fixation device according to claim 3, characterized in that: The two sides of the equalizing support element (302) are respectively provided with a first bottom plate (303) and a second bottom plate (304), the first bottom plate (303) and the second bottom plate (304) are respectively fixed on the two sides in the second air bag (301), a plurality of corrugated support plates (305) are arranged between the first bottom plate (303) and the second bottom plate (304), and the first bottom plate (303), the second bottom plate (304) and the plurality of corrugated support plates (305) form an elastic support structure.

5. An adjustable compression air bag rib fracture external fixation device according to claim 3, characterized in that: The material of the pressure equalizing support element (302) is any one of the following materials: TPU, TPE, and PP.

6. An adjustable compression air bag rib fracture external fixation device according to claim 3, characterized in that: The pressure regulating valve assembly (400) comprises a valve body (401) fixed between the corresponding second air chamber (202) and the second air bag (301), and the input end of the valve body (401) extends to the inside of the second air chamber (202), the output end of the valve body (401) extends to the outside of the second air bag (301), one end of the inside of the valve body (401) is provided with an airtight chamber (402), the outside of the valve body (401) is provided with an air outlet hole (403), the inside of the airtight chamber (402) is fixed with a limiting base (404), one end of the outside of the limiting base (404) is equipped with a spiral spring (405), one end of the spiral spring (405) is equipped with a valve ball (406), and in the initial state, the valve ball (406) can block the input end of the valve body (401).

7. An adjustable compression air bag rib fracture external fixation device according to claim 6, characterized in that: One end of the inside of the valve body (401) away from the second air chamber (202) is rotatably connected with a driving handle (410), the inside of the driving handle (410) is threadedly connected with a transmission rod (411), the outside of the transmission rod (411) is fixed with a first sleeve (412) and a second sleeve (413), the outside of the first sleeve (412) is fixed with a first sealing block (414), the outside of the second sleeve (413) is fixed with a second sealing block (415), and the first sealing block (414) and the valve body (401) and the second sealing block (415) and the valve body (401) are both in sliding connection, wherein, when the first sealing block (414) and the second sealing block (415) are located at one end of the air outlet hole (403) away from the second air chamber (202), the pressure regulating valve assembly (400) is in a pressure increasing state; when the first sealing block (414) and the second sealing block (415) are located at both ends of the air outlet hole (403) respectively, the pressure regulating valve assembly (400) is in a pressure maintaining state; when the first sealing block (414) and the second sealing block (415) are located at one end of the air outlet hole (403) close to the second air chamber (202), the pressure regulating valve assembly (400) is in a pressure relief state.

8. An adjustable compression air bag rib fracture external fixation device according to claim 7, characterized in that: The outside of the first sealing block (414) and the second sealing block (415) is provided with a rotation stopping surface, and the inside of the valve body (401) is provided with a chamfered surface, and the rotation stopping surface and the chamfered surface are matched.

9. An adjustable compression air bag rib fracture external fixation device according to claim 7, characterized in that: A plurality of exhaust grooves (416) are formed on the outside of the valve body (401) and inside the valve body (401), and the plurality of exhaust grooves (416) are arranged in a ring shape on the outside of the driving handle (410), wherein, when the driving handle (410) is in a pressure relief state, the second air bag (301) and the outside of the device are connected through the exhaust grooves (416).

10. The adjustable compression air bag rib fracture external fixation device of claim 7, wherein: The materials of the first sealing block (414) and the second sealing block (415) are any one of the following materials: silicone rubber, halogenated butyl rubber, isoprene rubber, PTFE, and PEEK.

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