A tourniquet at the junction of the torso and upper limb

Abstract

This utility model discloses a tourniquet for the junction of the torso and upper limb, including a chest adjustment band, an axillary adjustment band, and a pressure airbag. The chest and axillary adjustment bands are symmetrically connected by fixing pads. A shoulder adjustment band is provided on the upper part of the fixing pads, and the fixing pads and the adjustment bands can be adjusted for tightness. A base plate is fixedly provided on the bottom surface of the pressure airbag, which is attached to the inner side of the fixing pads. At least two pressure heads are fixedly provided on the bulging top circular platform of the pressure airbag. Each pressure head is a semi-circular cylinder with its cylindrical circumferential surface facing outwards and the pressure heads are close to each other, forming a double-contact design. This utility model allows for the adjustment of the tightness of multiple adjustment bands, making the tourniquet more conform to the human body shape. It can also precisely compress and stop bleeding from important blood vessels such as the subclavian artery and axillary artery in the upper limb. Compared with existing tourniquets, which are mostly surface-type, localized compression hemostasis, this reduces the pain experienced by the injured person during hemostasis.

Description

Technical Field

[0001] This utility model relates to the field of medical emergency equipment technology, and in particular to a tourniquet at the junction of the torso and upper limb. Background Technology

[0002] In pre-hospital emergency care and combat trauma treatment, controlling bleeding at the junction of the trunk and upper limbs (such as the axilla and subclavian region) is a challenging problem. This area has a complex anatomy, containing important blood vessels such as the subclavian and axillary arteries, and its irregular shape makes it impossible to use conventional limb tourniquets such as rotational tourniquets or cassette tourniquets for hemostasis. Traditional compression hemostasis is difficult to apply effectively and continuously, and without surgical support, the wounded may die from massive hemorrhage during transport. The effectiveness of hemostasis at the trunk-upper limb junction is affected by multiple factors. Firstly, the complex anatomy of this area, the deep location of blood vessels, and the resistance to compression from muscle, fat, and skin tissues, coupled with the high concentration of nerve tissue, make this area highly sensitive to pressure, resulting in intense pain for the wounded. Furthermore, the supporting structure for compression is the ribs, and the chest rises and falls with normal breathing. Therefore, high precision in hemostasis location, fixation method, and continuous pressure are required.

[0003] Existing tourniquets are mostly surface-type, localized compression hemostasis. For example, directly applying pressure to blood vessels with the frustum of the airbag top cannot guarantee that the surface of the frustum will completely conform to the body and apply pressure evenly. In reality, the frustum is often tilted at a certain angle, which can lead to the frustum covering the blood vessel but not providing sufficient pressure. Furthermore, during transport after hemostasis, slight movement of the blood vessel due to unilateral compression, chest rise and fall, or limb movement can affect the compression intensity. Even if the frustum of the airbag top can cover the wound, the accuracy of hemostasis is still low, requiring greater pressure on the bones and muscles outside the blood vessel to achieve hemostasis, and may even affect the patient's breathing. Therefore, there is an urgent need for a tourniquet for the upper limb junction that can precisely compress and stop bleeding from important blood vessels such as the subclavian artery and axillary artery, reducing the patient's pain during hemostasis. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and to provide a tourniquet at the junction of the upper limbs that can precisely compress and stop bleeding from important blood vessels such as the subclavian artery and axillary artery of the upper limbs, thereby reducing the pain of bleeding for the injured.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A tourniquet for the junction of the torso and upper limb includes a chest adjustment band, an axillary adjustment band, and a pressure bag. The chest and axillary adjustment bands are symmetrically connected by fixing pads. A shoulder adjustment band is located on the upper part of the fixing pads. The fixing pads, axillary adjustment bands, chest adjustment bands, and shoulder adjustment bands can be adjusted for tightness. A base plate is fixedly installed on the bottom surface of the pressure bag, which is attached to the inner side of the fixing pads. At least two pressure heads are fixedly installed on the bulging top circular platform of the pressure bag. Each pressure head is a columnar protrusion with a curved surface, and the pressure heads are close to each other. The surface of each pressure head is a semi-circular cylindrical arc surface or a curved surface that tapers from the outer end to the inner end. The height of each pressure head is 20-25 mm. The fixing pads are connected to the chest and shoulder adjustment bands by buckles. Both the chest and shoulder adjustment bands are equipped with ring handles.

[0007] Furthermore, one end of the armpit adjustment strap is fixedly connected to one of the fixing pads, and a square buckle is provided between the other end of the armpit adjustment strap and another fixing pad. The armpit adjustment strap also has an elastic buckle.

[0008] Furthermore, the fixing pad is triangular.

[0009] Furthermore, the base plate is provided with an arc-shaped reinforcing rib located in the inner circle, and a straight reinforcing rib connected to the edge of the base plate by the arc-shaped reinforcing rib.

[0010] Furthermore, the pressurized airbag is connected to an air guide tube, the other end of which is equipped with an inflatable airbag. The air guide tube is equipped with a one-way valve, and the inflatable airbag is equipped with a deflation valve.

[0011] Furthermore, the pressurized airbag is injection molded from thermoplastic polyurethane material with a hardness greater than 80 and less than 90. The pressurized airbag has multiple folded edges, each folded edge is inclined at 5° in the unfolding direction, the thickness of the bend between the folded edges is 2.4-3mm, the thickness of the top truncated cone is 5-6mm, and a cross-shaped reinforcing rib is fixedly installed inside the top truncated cone.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention is designed specifically for the area where the human torso and upper limbs meet, and can be applied to the left or right armpit region. It is suitable for various patient body types, easy to use, and appropriate for use in pre-hospital emergency care, disaster relief, or battlefield scenarios. The combination of the top truncated cone of the pressure bladder and the pressure head solves the problem of tourniquets only providing surface-level pressure for hemostasis. The inflating pressure bladder provides pressure to the wound without requiring excessive force. The semi-circular cylindrical pressure head precisely compresses vital blood vessels such as the inferior cerebrovascular artery and axillary artery located within the bones and muscles, improving hemostasis accuracy and avoiding the excessive pressure that can increase pain and impair breathing associated with wide-area pressure hemostasis. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the adjustment belt structure in this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the pressurized airbag in this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the bottom plate in this utility model;

[0018] Figure 5 Stress-deformation simulation analysis diagrams of stiffeners with different shapes;

[0019] Figure 6 This is a structural diagram of the folded edge of the pressurized airbag in this utility model;

[0020] Figure 7 This is a schematic diagram of the reinforcing ribs inside the pressurized airbag in this utility model;

[0021] Figure 8 This is a schematic diagram of the pressure head pressing on both sides of the blood vessel in this utility model;

[0022] Figure 9 This is a schematic diagram of the pressure head structure in Example 2.

[0023] Figure label:

[0024] 1-Shoulder adjustment strap, 2-Pressure airbag, 3-Inflatable airbag, 4-Pressure head, 5-Chest adjustment strap, 6-Axillary adjustment strap, 7-Fixing pad, 8-Snap buckle, 9-Ring handle, 10-Square buckle, 11-Elastic buckle, 12-Base plate, 13-Air duct, 14-One-way valve, 15-Deflator valve, 16-Reinforcing rib, 21-Bend, 22-Folded edge, 23-Top truncated cone. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Example 1

[0027] like Figures 1 to 5 As shown, a tourniquet at the junction of the torso and upper limb includes a chest adjustment band 5, an axillary adjustment band 6, and a pressure airbag 2. A fixing pad 7 is symmetrically connected between the chest adjustment band 5 and the axillary adjustment band 6. A shoulder adjustment band 1 is provided on the upper part of the fixing pad 7. The fixing pad 7, axillary adjustment band 6, chest adjustment band 5, and shoulder adjustment band 1 can be adjusted for tightness. A base plate 12 is fixedly provided on the bottom surface of the pressure airbag 2, and the base plate 12 is attached to the inner side of the fixing pad 7. At least two pressure heads 4 are fixedly provided on the bulging top truncated cone 23 of the pressure airbag 2. Each pressure head 4 is a columnar protrusion with an arc-shaped surface, and the pressure heads 4 are close to each other.

[0028] The pressure head 4 has a semi-circular cylindrical arc surface or an arc surface that tapers from the outer end to the inner end, with a height of 20-25mm. The arc surface of the pressure head 4 allows for precise compression and hemostasis of important blood vessels such as the inferior vena cava and axillary artery located within bones and muscles. This improves hemostasis accuracy and avoids excessive pressure on the injured person's body, which could increase pain and affect breathing. Simultaneously, the pressure head can extend the compression stroke by 20-25mm, increasing the total hemostatic pressure.

[0029] The fixing pad 7 is connected to the chest adjustment strap 5 and the shoulder adjustment strap 1 by buckles 8. Both the chest adjustment strap 5 and the shoulder adjustment strap 1 are equipped with ring handles 9. One end of the armpit adjustment strap 6 is fixedly connected to one of the fixing pads 7, and the other end of the armpit adjustment strap 6 is connected to the other fixing pad 7 by a square buckle 10. The armpit adjustment strap 6 also has a tensioning buckle 11. The ring handles 9 facilitate gripping the adjustment straps, eliminating the need to insert fingers between the adjustment straps and the injured person's body when adjusting the tension. Furthermore, the buckles 8 on both the chest adjustment strap 5 and the shoulder adjustment strap 1 allow for adjustment of the tourniquet tension from multiple positions, making it easier to conform to the human body shape. The compression hemostasis point at the junction of the upper limbs is located two finger-widths below the coracoid process; the tourniquet at the junction of the upper limbs is designed based on this compression hemostasis point and the surrounding structure. To ensure the pressure bag's fixing pad covers the area and tightens the bag while fully exposing the surrounding skin for easy positioning of the compression point, the most stable and reasonable fixation method is three-point fixation using straps at the ipsilateral acromion, armpit, and contralateral armpit. Therefore, the shoulder adjustment strap 1 and chest adjustment strap 5 are adjusted using buckles 8, and the armpit adjustment strap 6 is adjusted using elastic buckles 11. This allows for simultaneous fixation at the ipsilateral acromion, armpit, and contralateral armpit, ensuring even force distribution on the tourniquet in all three directions and preventing positional shift after tourniquet compression. Furthermore, the triangular fixing pad ensures balanced force distribution across the three adjustment straps.

[0030] The base plate 12 is provided with an arc-shaped reinforcing rib 16 located on the inner ring, and a straight reinforcing rib 16 connecting the arc-shaped reinforcing rib 16 to the edge of the base plate. The reinforcing rib 16 provides greater structural strength to the base plate 12, preventing deformation of the base plate 12 when the pressure from the inflation of the airbag 2 is high, thus avoiding insufficient support provided by the base plate 12. Furthermore, the combined deformation of the arc-shaped reinforcing rib and the straight reinforcing rib connected to the edge of the base plate 12 is minimal, resulting in a more stable structure under pressure and ensuring hemostasis pressure. Figure 5 As shown, by comparing the various reinforcing rib forms, including those without reinforcing ribs, radial reinforcing ribs, arc / radial reinforcing ribs, and the reinforcing ribs in this embodiment, it can be seen that the reinforcing rib combination in this embodiment has the smallest deformation, reducing it by 5% compared to the arc / radial reinforcing rib combination, 8% compared to the radial reinforcing rib structure, and 12% compared to the structure without reinforcing ribs. This makes the base plate 12 have a more stable structure when under pressure, ensuring hemostasis pressure.

[0031] The pressurized airbag 2 is connected to an air guide tube 13, and an inflatable airbag 3 is provided at the other end of the air guide tube 13. A one-way valve 14 is provided on the air guide tube 13, and a deflation valve 15 is provided on the inflatable airbag 3. When it is necessary to inflate the pressurized airbag 2, the inflatable airbag 3 is manually squeezed. After disconnecting the connection, the one-way valve 14 can prevent the pressurized airbag 2 from deflating. The deflation operation can be achieved by connecting the inflatable airbag 3 and then releasing the deflation valve 15.

[0032] like Figure 6 and Figure 7 As shown, the pressure airbag 2 is injection molded from thermoplastic polyurethane material with a hardness greater than 80 and less than 90. The pressure airbag 2 has multiple layers of folded edges 22, each layer of folded edges 22 is inclined at 5° in the unfolding direction, the thickness of the bend 21 between the folded edges 22 is 2.4-3mm, the thickness of the top truncated cone 23 is 5-6mm, and a cross-shaped reinforcing rib 16 is fixedly installed inside the top truncated cone 23. With sufficient thickness to ensure the strength of the airbag body, the multiple layers of folded edges 22 facilitate the folding and inflation of the pressure airbag 2. At the same time, the cross-shaped reinforcing rib 16 supports the top truncated cone 23, providing support for the pressure head 4 during hemostasis and preventing the top truncated cone 23 from collapsing inward after the pressure head 4 applies force.

[0033] like Figure 8 As shown, this utility model targets the junction of the human torso and upper limbs, particularly the axillary region. The axillary artery is the main artery at the junction of the torso and upper limbs, transporting blood from the torso to the upper limbs. When bleeding occurs in the axillary region, blood is transported through the axillary artery... Figure 8 As shown, applying a tourniquet to the axillary artery can cut off blood flow in that area, inhibiting bleeding. Then, bandaging the wound completes the emergency treatment for a patient with severe bleeding. Simultaneously, this structure compresses the blood vessel towards the center of the two contact points, preventing vessel displacement and improving hemostatic stability.

[0034] This tourniquet can also be used to bandage and stop bleeding from wounds. The pressure head 4 features a double-contact design on the side that contacts the body, further increasing the pressure while avoiding excessive pressure on the injured person's body from large-area compression, which could increase pain and affect breathing. Furthermore, some commercially available products and related patents, due to unclear compression points, use an enlarged pressure bag 2 to cover a larger area. Because the armpit area is rich in sensitive nerves, the injured person experiences significant pressure pain, resulting in substantial tourniquet pain and poor tolerance for continuous use. This patented design of the pressure head 4 effectively solves these problems.

[0035] Example 2

[0036] like Figure 9 As shown, the surface of the pressure head 4 is an arc-shaped surface that tapers from the outer end to the inner end. The bottom of the pressure head 4 also has a cover that allows it to be fastened to the outside of the top truncated cone 23. Because the pressure generated by the pressure head 4 is higher on both sides and lower in the middle, it is easier to squeeze the blood vessel towards the center of the two contact points, preventing blood vessel displacement. At the same time, it only strengthens the pressure on the wound site for hemostasis, resulting in less pressure pain for the injured person compared to planar pressure hemostasis methods.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tourniquet at the junction of the trunk and upper limb, comprising a chest adjustment band (5), an axillary adjustment band (6), and a pressure bag (2), characterized in that: A fixing pad (7) is symmetrically connected between the chest adjustment strap (5) and the armpit adjustment strap (6). A shoulder adjustment strap (1) is provided on the upper part of the fixing pad (7). The fixing pad (7) can be adjusted in tightness with the armpit adjustment strap (6), the chest adjustment strap (5), and the shoulder adjustment strap (1). A base plate (12) is fixedly provided on the bottom surface of the pressurized airbag (2). The base plate (12) is attached to the inner side of the fixing pad (7). At least two pressurizing heads are fixedly provided on the bulging top truncated cone (23) of the pressurized airbag (2). 4); The pressure heads (4) are all columnar protrusions. The surface of the pressure heads (4) has an arc surface and the pressure heads (4) are close to each other. The surface of the pressure heads (4) is a semi-circular cylindrical arc surface or an arc surface that shrinks from the outer end to the inner end of the pressure heads (4). The height of the pressure heads (4) is 20-25mm. The fixing pad (7) is connected to the chest adjustment belt (5) and the shoulder adjustment belt (1) by buckles (8). The chest adjustment belt (5) and the shoulder adjustment belt (1) are both provided with ring handles (9).

2. A tourniquet at the junction of the torso and upper limb according to claim 1, characterized in that: One end of the armpit adjustment strap (6) is fixedly connected to one of the fixing pads (7), and a square buckle (10) is provided between the other end of the armpit adjustment strap (6) and another fixing pad (7). The armpit adjustment strap (6) has an elastic buckle (11).

3. A tourniquet at the junction of the torso and upper limb according to claim 2, characterized in that: The fixing pad (7) is triangular.

4. A tourniquet at the junction of the torso and upper limb according to claim 1, characterized in that: The base plate (12) is provided with an arc-shaped reinforcing rib (16) located in the inner circle, and a straight reinforcing rib (16) connected to the edge of the base plate by the arc-shaped reinforcing rib.

5. A tourniquet at the junction of the trunk and upper limb according to claim 1, characterized in that: The pressurized airbag (2) is connected to an air guide tube (13), and an inflatable airbag (3) is provided at the other end of the air guide tube (13). A one-way valve (14) is provided on the air guide tube (13), and a deflation valve (15) is provided on the inflatable airbag (3).

6. A tourniquet at the junction of the torso and upper limb according to claim 5, characterized in that: The pressurized airbag (2) is injection molded from thermoplastic polyurethane material with a hardness greater than 80 and less than 90. The pressurized airbag (2) has multiple layers of folded edges (22). Each layer of folded edge (22) is inclined at 5° in the unfolding direction. The thickness of the bend (21) between the folded edges (22) is 2.4-3mm. The thickness of the top truncated cone (23) is 5-6mm. A cross-shaped reinforcing rib (16) is fixedly installed inside the top truncated cone (23).

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