A rapid prototyping compression hemostatic device for acute wounds

Abstract

The present application relates to the technical field of trauma first-aid medical devices, and particularly discloses a rapid forming compression hemostasis device for acute wounds, which comprises a compression belt, a limiting and clamping assembly, and a fixing member. The present application adopts a vacuum sealing storage structure to store medical polyurethane forming dressings, which can effectively isolate air and water vapor. The polyurethane dressings are quickly attached to the wound surface through a simple opening structure. The material can quickly absorb water and expand when it comes into contact with blood and tissue exudate, and is solidified and formed. The material can be self-adapted to irregular wound surfaces to tightly attach and block the bleeding channels. Meanwhile, the material can rely on the self-localized compression effect generated by the expansion to combine with the external mechanical compression of the device to form a double composite compression hemostasis system, which can effectively compress the bleeding points and subcutaneous blood vessels of the wound surface and reduce the amount of bleeding.

Description

Technical Field

[0001] This invention relates to the field of trauma emergency medical device technology, specifically to a rapid molding and compression hemostasis device made of special materials for acute wounds. Background Technology

[0002] In clinical emergency, outdoor rescue, and trauma first aid scenarios, acute bleeding wounds of the limbs are characterized by their sudden onset, rapid bleeding, and irregular wound shape. If hemostasis is not performed promptly or the method is inappropriate, it can easily lead to excessive blood loss, wound infection, and worsened tissue damage, which can seriously threaten the patient's life. Currently, acute wound hemostasis is mostly achieved using conventional methods such as traditional gauze pressure, elastic bandage application, and ordinary hemostatic dressings. While these methods are relatively standard, there is still room for improvement in their practical application.

[0003] Traditional bandaging for hemostasis relies heavily on the manual pressure applied by healthcare professionals, making it difficult to precisely quantify the pressure. This can easily lead to insufficient pressure, resulting in ineffective hemostasis, or excessive pressure, causing localized ischemia and soft tissue damage. The safety and controllability of hemostasis procedures need improvement. Furthermore, conventional bandages have limited breathability; after prolonged use, the skin around the wound is prone to dampness, maceration, and itching, increasing the risk of infection.

[0004] Traditional hemostatic dressings are mostly one-piece, disposable structures. Replacing these dressings requires replacing the entire device, resulting in low equipment reuse rates and increasing the cost of emergency supplies. Furthermore, most existing hemostatic devices lack dedicated exudate collection structures, allowing exudate from the wound to easily overflow and soak the dressing, contaminating the surrounding area and promoting bacterial growth, thus affecting wound healing. Summary of the Invention

[0005] The purpose of this invention is to provide a rapid molding and compression hemostasis device for acute wounds made of special materials, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A rapid prototyping compression hemostasis device for acute wounds includes a pressure band for carrying the rapid prototyping hemostatic material and conforming it to the acute wound surface, and a limiting and locking assembly assembled in the middle of the bottom surface of the pressure band. The limiting and locking assembly includes a fixing member, and a dressing pad is detachably mounted on the outside of the fixing member. An air bladder is provided in the dressing pad, and a plastic pouch is integrally formed at the bottom of the air bladder. A medical polyurethane molded dressing pad is placed inside the plastic pouch, and a sealing film is laid on the outer surface of the medical polyurethane molded dressing pad. A pressure detector is embedded in the top surface of the pressure band. The pressure detector has multiple sets of pressure sensors built in, which are used to collect wound pressure values ​​in real time and display them visually. An elastic bandage is detachably mounted on both ends of the pressure bandage. An arc-shaped support plate is fixed on the inner side of the elastic bandage, and the arc-shaped support plate and the dressing pad are arranged opposite each other vertically.

[0007] As a preferred embodiment of the present invention, the pressure band has connecting ears integrally formed on both sides, and a through movable opening is opened inside the connecting ears. The two ends of the elastic bandage are inserted into the movable opening to achieve detachable assembly with the pressure band.

[0008] As a preferred embodiment of the present invention, the elastic bandage is provided with ventilation holes on both sides, and the two ends of the elastic bandage extend to the outside of the opening and are connected to the elastic band, and the ends of the elastic band are provided with Velcro adhesive pieces.

[0009] As a preferred embodiment of the present invention, the elastic bandage has a hook and loop fastener on the outer wall near the hook and loop fastener, the hook and loop fastener and the hook and loop fastener are glued together, and the inner wall of the elastic bandage has a skin-friendly pad.

[0010] As a preferred embodiment of the present invention, a fixing seat is provided in the middle of the pressure belt, a rotating assembly knob is mounted on the top of the fixing seat, a screw is coaxially connected to the lower end of the knob, and the screw passes downward through the pressure belt and is connected to a smoothing block.

[0011] As a preferred embodiment of the present invention, elastic blocks are provided on both sides of the bottom of the fixing member, and the bottom of the two elastic blocks that are far apart from each other are integrally formed with a limiting block.

[0012] As a preferred embodiment of the present invention, elastic bands are symmetrically arranged on both sides of the top surface of the dressing pad, and an installation opening is provided in the dressing pad.

[0013] As a preferred embodiment of the present invention, the dressing pad is snapped onto the limiting and engaging assembly by an elastic band, thereby enabling the detachable assembly of the dressing pad and the pressure band.

[0014] As a preferred embodiment of the present invention, the airbag is embedded inside the installation port, and an opening is provided on one side of the outer wall of the airbag, and a tear-off sealing sheet for sealing is attached to the outside of the opening.

[0015] As a preferred embodiment of the present invention, a flap is integrally formed at one corner of the sealing membrane, and a connecting hose is fixedly connected to the outer wall of the airbag on the side away from the opening, with a leakage soft bottle connected to the end of the connecting hose.

[0016] Compared with the prior art, the beneficial effects of the present invention are: In this invention, an adjustable elastic bandage with a multi-level adjustable Velcro structure can adapt to the bandaging needs of different limb thicknesses and wound widths. Combined with the bandage's breathable and skin-friendly structure, it improves breathability and wearing comfort, avoiding problems such as skin dampness, maceration, and itching caused by prolonged pressure bandaging. Simultaneously, the arc-shaped pressure-equalizing support structure disperses localized concentrated pressure, effectively preventing secondary damage to surrounding soft tissues caused by rigid compression. Compared to traditional manual, experience-based pressure hemostasis, this device is equipped with real-time pressure detection and a stepless pressure adjustment structure. It can collect and visualize wound pressure at multiple points, achieving precise quantitative control of pressure. This completely solves the problem of hemostasis failure or local limb ischemia caused by blind manual pressure. The pressure intensity can be flexibly adjusted according to the degree of wound bleeding, adapting to various hemostasis conditions. Furthermore, the device adopts a flexible snap-fit ​​modular structure, supporting quick disassembly and replacement of hemostatic dressings. The main body of the device is reusable, significantly reducing the cost of emergency consumables and improving the overall practicality and utilization rate of the equipment.

[0017] This invention employs a vacuum-sealed storage structure to store medical polyurethane molded dressings. This effectively isolates the dressing from air and moisture, preventing premature activation, curing, and failure of the hemostatic material. This ensures the long-term stability of the consumables and meets the emergency needs for immediate use. During emergency procedures, the polyurethane dressing can be quickly applied to the wound through a simple opening structure. Utilizing the material's ability to rapidly absorb water, expand, and solidify upon contact with blood and tissue exudate, it adapts to various irregular wounds, tightly sealing bleeding channels. Simultaneously, the self-regulating local pressure effect generated by the material's expansion, combined with external mechanical pressure, forms a dual-compound hemostasis system. This effectively compresses bleeding points and subcutaneous blood vessels, reducing wound bleeding and significantly improving the efficiency and timeliness of acute wound hemostasis. Furthermore, the device features an independent exudate collection structure to centrally collect wound exudate, preventing overflow and contamination of the dressing structure and wound surface. This maintains a dry and clean healing environment, inhibiting bacterial growth, effectively reducing the probability of wound infection, and providing a good foundation for subsequent wound healing. This comprehensively enhances the safety and reliability of acute wound emergency care. Attached Figure Description

[0018] Figure 1 This is a front view of the rapid prototyping compression hemostasis device made of special materials for acute wounds according to the present invention; Figure 2 This is a bottom view of the elastic bandage of the present invention; Figure 3 This is a schematic diagram of the pressure belt structure of the present invention; Figure 4 This is a schematic diagram of the elastic bandage of the present invention; Figure 5 This is a schematic diagram of the structure of the fixing part of the present invention; Figure 6 This is a front view of the dressing pad of the present invention; Figure 7 This is an exploded view of the dressing pad and air bladder of the present invention; Figure 8 This is a partial exploded view of the airbag of the present invention.

[0019] In the diagram: 1. Pressure band; 11. Connecting ear; 12. Movable port; 2. Pressure detector; 21. Pressure sensor; 3. Elastic bandage; 31. Ventilation hole; 32. Telescopic band; 33. Velcro adhesive patch; 34. Skin-friendly pad; 35. Velcro fixing piece; 4. Fixing base; 41. Knob; 42. Screw; 43. Smoothing block; 5. Arc-shaped support plate; 6. Dressing pad; 61. Elastic band; 62. Installation port; 7. Fixing element; 71. Elastic locking block; 72. Limiting block; 8. Airbag; 81. Plastic pouch; 82. Tear-off sealing sheet; 83. Sealing film; 84. Lifting piece; 85. Opening; 86. Medical polyurethane molded dressing pad; 87. Connecting tubing; 88. Exudate soft bottle. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] To facilitate understanding of the present invention, a more comprehensive description of the invention will be given below with reference to the accompanying drawings, and several embodiments of the invention will be provided. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the invention will be more thorough and complete.

[0022] For examples, please refer to Figures 1-4 The present invention provides a technical solution: A rapid molding and compression hemostasis device for acute wounds using special materials mainly includes a pressure band 1, a pressure detector 2, an elastic bandage 3, a spiral pressure regulating component, a limiting and locking component, a dressing pad 6, and a built-in material storage and pressure airbag 8. The entire structure works together to achieve multiple functions such as rapid molding of polyurethane dressings for wounds, controllable and uniform pressure, real-time pressure monitoring, and breathable and comfortable binding.

[0023] The pressure bandage 1 serves as the overall load-bearing base, with integrally molded connecting ears 11 on both sides. A through-hole movable opening 12 is provided inside the connecting ears 11, through which the elastic bandage 3 is detachably assembled. The movable opening 12 allows for lateral sliding, enabling fine-tuning of the elastic bandage 3's left and right position according to the wound width, adapting to wounds of different sizes. Assembly and disassembly require no additional tools, making operation simple. The elastic bandage 3 has evenly distributed breathable holes 31 on both sides, with a skin-friendly pad 34 adhered to the inner wall. The breathable holes 31 continuously wick away moisture from the limb's skin, while the skin-friendly pad 34 cushions the friction and irritation from the hard structure. Long-term wear is less prone to skin dampness, itching, or maceration, significantly improving comfort during emergency treatment. The elastic bandage 3 extends outward at both ends to form a telescopic band 32. At the ends of the telescopic band 32 are attached Velcro fasteners 33 and Velcro fixing pieces 35, which are then fastened together to secure the limb. The telescopic band 32 has inherent elasticity, and the Velcro fasteners 33 allow for multi-level adjustment of the fit length to accommodate limbs of varying sizes, such as arms and calves. Once bound, it is not easily loosened or shifted, providing strong stability in complex scenarios such as fieldwork and emergency rooms. An arc-shaped support plate 5 is fixed to the inner center of the elastic bandage 3. The arc-shaped support plate 5 and the dressing pad 6 below are arranged vertically opposite each other. The curved surface conforms to the contours of the human limb, dispersing concentrated local pressure and preventing secondary compression damage to the surrounding soft tissues from single-point high pressure.

[0024] Reference Figure 5 As shown, a pressure detector 2 is embedded in the top surface of the pressure band 1. The pressure detector 2 integrates multiple pressure sensors 21. The pressure detector 2 uses an HX711 analog-to-digital converter module paired with an SSD1306 OLED display module. The pressure sensor 21 uses a FlexiForce A201-100 medical flexible pressure sensor. The sensor can collect wound pressure data simultaneously from multiple points and display it visually. The multi-point acquisition mode can intuitively reflect the overall pressure uniformity of the wound. Medical staff can accurately judge whether the compression force is up to standard, solving the defects of traditional hemostasis devices that cannot quantify pressure, fail to stop bleeding due to insufficient pressure, or cause tissue ischemia and necrosis due to excessive pressure. A fixed base 4 is set in the middle of the top surface of the pressure band 1 to form a spiral pressure regulating component. A knob 41 is rotated on the top of the fixed base 4. The lower end of the knob 41 is coaxially fixed to a screw 42. The screw 42 passes through the bottom surface of the pressure band 1 and is connected to a smoothing block 43. Rotating the knob 41 in the forward direction can drive the screw 42 to move downward, causing the smoothing block 43 to press down on the dressing pad 6 to increase the pressure intensity on the wound. Rotating in the reverse direction can raise and release the pressure. The pressure intensity can be steplessly adjusted to meet the hemostasis needs of different acute wounds, such as slight oozing and large active bleeding. The pressure adjustment is linear and controllable, and the operation is intuitive and simple.

[0025] like Figures 6-8As shown, a limiting and engaging assembly is installed in the middle of the bottom surface of the pressure belt 1. The limiting and engaging assembly includes a fixing component 7. Elastic blocks 71 are symmetrically arranged on both sides of the bottom of the fixing component 7. A limiting block 72 is integrally formed at the bottom of the opposite ends of the two elastic blocks 71. Elastic bands 61 are symmetrically arranged on both sides of the top surface of the dressing pad 6. An installation port 62 is opened in the middle of the dressing pad 6. During assembly, the elastic bands 61 on both sides are sleeved on the elastic blocks 71 and the limiting block 72. The locking and limiting are achieved by their own elastic pre-tightening force. After the emergency treatment, the two opposite elastic blocks 71 are engaged inward, and the dressing pad 6 can be pulled down for quick disassembly, realizing independent replacement of dressing consumables. The main body of the entire device can be reused, reducing the cost of emergency consumables.

[0026] In this embodiment, an airbag 8 is embedded inside the installation port 62 of the dressing pad 6. The bottom of the airbag 8 is integrally molded into a plastic pocket 81. The plastic pocket 81 contains a medical polyurethane molded dressing pad 86. The outer surface of the medical polyurethane molded dressing pad 86 is completely covered with a sealing film 83. The sealing film 83 isolates air and moisture, preventing the polyurethane material from prematurely contacting external body fluids and curing prematurely, thus ensuring the shelf life of the consumables. An opening 85 is made on one side of the outer wall of the airbag 8. A tear-off sealing sheet 82 is attached to the outside of the opening 85 to achieve daily sealed storage. At this time, the inside of the airbag 8 is in a vacuum state. A flap 84 is integrally formed on one side of the sealing film 83. Lifting the flap 84 exposes the medical polyurethane molded dressing pad 86. After the airbag 8 is compressed, the polyurethane material can be evenly applied to cover the acute wound through the opening 85. After the material comes into contact with blood and tissue fluid, it quickly molds and solidifies, tightly adhering to the irregular wound to form a closed hemostatic layer. It is suitable for various acute irregular wounds such as lacerations, cuts, and abrasions. With the tear-off sealing sheet 82, air enters the airbag 8. At this time, the inside gradually fills up, allowing the medical polyurethane molded dressing pad 86 to come into contact with wound exudate and body fluid, triggering a water absorption and expansion reaction. No scissors or knives are needed. Emergency scenarios can be activated in a second, meeting the time requirements for emergency hemostasis.

[0027] Furthermore, the outer wall of the airbag 8 on the side away from the opening 85 is connected to a fixed connecting hose 87, and the end of the connecting hose 87 is connected to an exudate bottle 88. The connecting hose 87 can transmit the internal pressure of the airbag 8, and at the same time, a small amount of exudate from the wound can be guided through the opening 85 and the connecting hose 87 to the inside of the exudate bottle 88 for collection, avoiding the exudate from flowing around and contaminating or wetting the bandage, keeping the wound area dry and clean, and reducing the risk of wound infection.

[0028] Workflow of this invention: When this device is in operation, the pressure band 1 serves as the overall supporting base, and the elastic bandage 3 completes the rapid adaptation and binding fixation of the entire device to the patient's limb. During actual assembly, the elastic properties of the telescopic band 32, combined with the multi-level adhesive cooperation of the Velcro adhesive pad 33 and the Velcro fixing pad 35, can stably bind limbs of different thicknesses, ensuring a secure and non-loose fixation. The breathable pores 31 continuously guide moisture from the skin surface, and the inner skin-friendly pad 34 cushions the friction of the restraint, effectively avoiding problems such as skin dampness, maceration, and itching caused by long-term pressure; at the same time, the arc-shaped support plate 5 can evenly support the soft tissue around the wound, dispersing localized concentrated pressure and avoiding secondary damage to the wound caused by hard pressure, thus creating a stable base for subsequent precise pressure application and material molding for hemostasis.

[0029] After the device is in place, multiple pressure sensors 21 simultaneously collect wound pressure data at multiple points, monitoring the uniformity of wound pressure and the overall pressure value in real time. Medical staff can adjust the pressure intensity through the spiral pressure regulating component based on the real-time monitored pressure data and wound bleeding. Rotating the knob 41 can drive the screw 42 to move vertically up and down, driving the smoothing block 43 to move up and down, and steplessly adjusting the mechanical pressure on the dressing pad 6. It can adapt to different acute wound pressure hemostasis conditions such as minor bleeding and active massive bleeding, ensuring that the external mechanical pressure is precise, controllable, and highly adaptable.

[0030] The device adopts a modular and detachable assembly structure. The dressing pad 6 is quickly assembled and disassembled and stably fixed through the limiting and locking component at the bottom of the pressure band 1. In the working state, the elastic locking block 71 and the limiting block 72 cooperate with each other to form an elastic pre-tightening locking structure with the elastic band 61 at the top of the dressing pad 6, so that the dressing pad 6 does not shift or shake during pressure hemostasis, and the assembly stability is high. After the emergency operation is completed, the limiting structure can be quickly unlocked by simply squeezing the elastic locking block 71 inward, and the dressing pad 6 can be directly pulled out to replace the consumable. The main body of the device can be reused repeatedly, effectively reducing the cost of consumables in clinical and outdoor emergency care.

[0031] In normal storage, the airbag 8 maintains a vacuum state inside, which, together with the outer tear-off sealing sheet 82 and sealing film 83, provides all-round sealing protection for the medical polyurethane molded dressing pad 86 inside the plastic pouch 81. This effectively isolates the material from air and external moisture, preventing premature activation and curing of the polyurethane material and ensuring the storage stability and shelf life of the consumables. During emergency operations, simply tear open the tear-off sealing sheet 82 to allow outside air to quickly enter the airbag 8, releasing the vacuum seal. Then, lift the flap 84 at the corner of the sealing film 83 to allow the medical polyurethane molded dressing pad 86 to precisely fit the acute wound. The medical polyurethane molded dressing pad 86 can quickly trigger a water absorption, expansion, and curing reaction after contact with wound blood and tissue exudate. On the one hand, it can adapt to various irregular wounds such as lacerations, cuts, and abrasions, quickly sealing bleeding wounds and closing bleeding channels. On the other hand, relying on the continuous and uniform water absorption and expansion characteristics of polyurethane material, it can form a self-regulating secondary pressure effect on the wound surface. Combined with the external mechanical pressure of the smoothing block 43, it forms a composite compression hemostasis system of "mechanical pressure stabilization + material self-expansion pressure", further tightening wound blood vessels and compressing subcutaneous bleeding points, significantly reducing wound exudate and greatly improving the speed and effect of acute wound hemostasis.

[0032] During the entire hemostasis process, a small amount of tissue exudate generated by the wound can be smoothly guided through the opening 85 of the airbag 8 and the connecting tube 87, and finally collected into the end exudate soft bottle 88. This effectively prevents the exudate from overflowing and staining the bandage and contaminating the skin around the wound, continuously maintaining a dry and clean recovery environment for the wound, reducing bacterial growth, and significantly reducing the risk of postoperative infection of acute wounds.

[0033] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art and are also general components, which are common knowledge in this field.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid prototyping compression hemostatic device for acute wounds, comprising a pressure band (1) for carrying the rapid prototyping hemostatic material and conforming to the acute wound surface, characterized in that: A limiting engagement assembly is assembled in the middle of the bottom surface of the pressure belt (1). The limiting engagement assembly includes a fixing member (7). A dressing pad (6) is detachably assembled on the outside of the fixing member (7). An airbag (8) is provided in the dressing pad (6). A plastic pocket (81) is integrally formed at the bottom of the airbag (8). A medical polyurethane molded dressing pad (86) is built into the plastic pocket (81). A sealing film (83) is laid on the outer surface of the medical polyurethane molded dressing pad (86). A pressure detector (2) is embedded in the top surface of the pressure band (1). The pressure detector (2) has multiple sets of pressure sensors (21) built in it, which are used to collect the pressure value of the wound in real time and display it visually. Elastic bandage (3) is detachably assembled at both ends of the pressure band (1). An arc-shaped support plate (5) is fixed on the inner side of the elastic bandage (3). The arc-shaped support plate (5) and the dressing pad (6) are arranged opposite each other vertically.

2. The rapid prototyping compression hemostasis device for acute wounds made of special materials according to claim 1, characterized in that, The pressure band (1) has connecting ears (11) integrally formed on both sides. The connecting ears (11) have through-type movable openings (12) inside. The elastic band (3) is inserted at both ends through the movable openings (12) to achieve detachable assembly with the pressure band (1).

3. The rapid prototyping compression hemostasis device for acute wounds made of special materials according to claim 2, characterized in that, The elastic bandage (3) has ventilation holes (31) on both sides. Both ends of the elastic bandage (3) extend to the outside of the movable opening (12) and are connected to the elastic band (32). The ends of the elastic band (32) are provided with Velcro patches (33).

4. A rapid molding compression hemostasis device for acute wounds made of special materials, as described in claim 3, is characterized in that... The elastic bandage (3) has a hook and loop fastener (35) on the outer wall near the hook and loop fastener (33). The hook and loop fastener (33) and the hook and loop fastener (35) are attached together. The inner wall of the elastic bandage (3) has a skin-friendly pad (34).

5. A rapid molding compression hemostasis device for acute wounds made of special materials according to claim 1, characterized in that, The pressure belt (1) is provided with a fixed seat (4) in the middle. A knob (41) is mounted on the top of the fixed seat (4). A screw (42) is coaxially connected to the lower end of the knob (41). The screw (42) passes through the pressure belt (1) downward and is connected to a smoothing block (43).

6. A rapid prototyping compression hemostasis device for acute wounds made of special materials according to claim 1, characterized in that, Both sides of the bottom of the fixing member (7) are provided with elastic blocks (71), and the bottom of the two elastic blocks (71) that are far apart from each other are integrally formed with a limiting block (72).

7. A rapid molding compression hemostasis device for acute wounds made of special materials according to claim 1, characterized in that, The dressing pad (6) has elastic bands (61) symmetrically arranged on both sides of the top surface, and the dressing pad (6) has an installation opening (62).

8. A rapid molding compression hemostasis device for acute wounds made of special materials according to claim 7, characterized in that, The dressing pad (6) is snapped onto the limiting engagement assembly by the elastic band (61), thereby enabling the dressing pad (6) and the pressure band (1) to be detachably assembled.

9. A rapid molding compression hemostasis device for acute wounds made of special materials according to claim 7, characterized in that, The airbag (8) is embedded inside the mounting port (62). An opening (85) is provided on one side of the outer wall of the airbag (8). A tear-off sealing sheet (82) for sealing is attached to the outside of the opening (85).

10. A rapid molding compression hemostasis device for acute wounds made of special materials according to claim 9, characterized in that, A flap (84) is integrally formed at one corner of the sealing membrane (83), and a connecting hose (87) is fixedly connected to the outer wall of the airbag (8) away from the opening (85). A leak bottle (88) is connected to the end of the connecting hose (87).

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