CN-121971139-A - Tourniquet for field first aid

CN121971139ACN 121971139 ACN121971139 ACN 121971139ACN-121971139-A

Abstract

Compared with the prior art, the tourniquet has the advantages that the tourniquet is simple in structure, low in cost and easy to manufacture, one-key buckle connection can be realized, in the tourniquet treatment process, the gel layer in the tourniquet body absorbs water and swells, the volume is increased, two sides of a wound are extruded to be attached, meanwhile, the coagulant is conveyed to the wound to stop bleeding, a larger wound surface can be repaired, self-fastening of the tourniquet is achieved, the gel layer can keep moderate wetting of the hemostatic portion, silver ions generated after silver ion salt of the hemostatic portion is dissolved can prevent infection around the wound, bacterial growth is inhibited, human/animal body scratching in the wound healing process is avoided, and the wound healing efficiency is improved.

Inventors

SHEN CAIFU
YANG XUEMEI
WU BIN
Mao Zehai
LI PENGQI
YAN ZHIWEI
CAI SHILONG
Yangzong Dawa

Assignees

中国人民解放军陆军第九五七医院
中国人民解放军陆军第九五八医院
中国人民解放军联勤保障部队临潼康复疗养中心

Dates

Publication Date: 20260505
Application Date: 20260331

Claims (10)

1. The tourniquet for field emergency treatment is provided with a wearable band body and is characterized in that the band body is provided with a first end and a second end, the first end and the second end are in buckling connection to enable the band body to form a wearable ring shape, a coagulant is arranged in the second end, a hemostatic part is arranged on the inner side of the band body, and the coagulant is conveyed to an external wound to stop bleeding through the first end; the hemostatic part is made of medical fabric and is coated with sodium alginate and soluble silver ion salt.
2. The tourniquet for field emergency treatment of claim 1, wherein the tourniquet body comprises an outer layer, a gel layer, a fiber layer and an inner layer from outside to inside, wherein a plurality of capillaries are arranged in parallel along the length direction inside the outer layer, each capillary is connected with a plurality of capillary branch pipes, the inner diameter of each capillary branch pipe is smaller than the inner diameter of each capillary branch pipe, and the opening of each capillary branch pipe faces the gel layer.
3. A tourniquet for field emergency use according to claim 2, wherein the gel layer is hydrogel.
4. A tourniquet for field emergency treatment according to claim 3, wherein said gel layer material comprises vinyl alcohol (PVA) as a polymer monomer, methylene Bisacrylamide (MBAA) as a cross-linking agent, ammonium Persulfate (APS) as an initiator, and nano silver ions dispersed in lactic acid and a cross-linking accelerator ascorbic acid (ASA) as a chelating agent.
5. The tourniquet of claim 4, wherein the PVA has a solids content of 22 wt%, and each 100: 100g solution uses 22.00: 22.00 g PVA as a polymer monomer, 0.12: 0.12 g MBAA as a covalent cross-linking agent, 0.185: 0.185 g APS as an initiator, 0.166: 0.166 g ASA as a cross-linking accelerator, a cross-linking concentration of nano silver ions of 0.08mol/L, and a lactic acid concentration of 10.66mol/L.
6. A tourniquet for field emergency treatment according to claim 4, wherein after the gel layer material is fully stirred and degassed, the gel layer material is poured into a mould, and polymerized for 1-1.5 hours under the water bath condition of 55-60 ℃, 10-15 mu L of tetramethyl ethylenediamine is used as a catalyst in the process, PVA is polymerized and chelated under the actions of a cross-linking agent, an initiator and a cross-linking accelerator in the process, and the gel layer is obtained after the solidified hydrogel is demoulded.
7. The tourniquet of claim 1, wherein the first end is physically connected to the band body and comprises a base and a first connecting edge, wherein a plurality of first connecting edges are connected to two sides of the base, a liquid bag is fixed on the base and comprises an outer skin layer and an inner membrane layer, a plurality of guide holes are formed in the outer skin layer in a penetrating manner, the inner membrane layer is exposed in the guide holes, liquid is wrapped in the inner membrane layer, and the first connecting edge is concaved Cheng Kacao near the base.
8. The tourniquet of claim 1, wherein the second end is physically connected to the band body and comprises a base plate and second connecting edges, wherein a plurality of the second connecting edges are connected to two sides of the base plate, the second connecting edges are provided with outwards protruding clamping protrusions, the clamping protrusions are matched with the clamping grooves, and openings are formed in the positions of the adjacent second connecting edges.
9. The tourniquet of claim 1, wherein the second end comprises a plurality of array-like tips formed on the base plate, the tips having openings, and a chamber in the tips, wherein the chamber contains lyophilized beads of coagulant.
10. The tourniquet of claim 9, wherein the cavity is disposed through a substrate, the substrate is sealed by a sealing sheet, and the sharp-mouth opening is sealed by a soluble sealing material.

Description

Tourniquet for field first aid Technical Field The invention relates to the technical field of medical supplies, in particular to a tourniquet for field emergency treatment. Background In the field activity process, after the limbs are scratched by a sharp device or are beaten by a blunt device, bleeding is easy, especially arterial blood vessels are high in pressure, if hemostasis is not timely carried out, life is endangered, tourniquets are usually adopted for hemostasis in the prior art, the most common tourniquet is a band-aid, but the tourniquet can only carry out hemostasis repair on micro-wound surfaces, small-wound surfaces or venous bleeding, and cannot be suitable for hemostasis repair on severe skin injuries such as large-wound surfaces, arterial bleeding and the like. Because the muscle has elasticity, the sticky tourniquet is easy to loosen, and the tourniquet with mechanical fasteners is usually adopted for hemostasis in the situations of large wound surface, arterial hemorrhage and the like, such as CN118750090A, CN117561032A, KR102105406B1, KR102203129B1 and GB2543652A, US11759213B2 in the prior art, the tourniquet is bound by adopting the mechanical fasteners similar to the belt ends, but the binding mode is not strong in wearable comfort, the processing and manufacturing process is complex, the application range is narrow, for example, the tourniquet with the mechanical fasteners can only be bound on legs, wrists and arms of a human body/an animal body, and the tourniquet can not be applied after the finger/toe is wounded. In addition, in the process of wound crusting, due to bacteria existing at the wound, internal white blood cells are transported to the wound for bioremediation, so that moisture on the outer layer of the wound is lost, body fluid microcirculation is not smooth, neurons at the wound are further disturbed, dry itching is easy to occur on a human body/animal body, the wound is scratched by the human body/animal body, and the tourniquet of the adhesive type is easy to fall off or cause wound recurrence. Disclosure of Invention In order to solve the technical problems in the background art, the invention provides a tourniquet for field emergency treatment, which comprises the following specific technical scheme: The utility model provides a tourniquet of open-air first aid usefulness, has wearable area body, and the area body has first end and second end, and first end and second end buckle are connected and are made the area body form wearable cyclic annular, and the area body inboard has hemostatic portion for stopping bleeding to the external wound of human or animal. The hemostatic part adopts medical fabric and is coated with sodium alginate and soluble silver ion salt. The belt body comprises an outer layer, a gel layer, a fiber weaving layer and an inner layer from outside to inside in sequence, wherein the outer layer can be made of a high polymer material with compact quality, a plurality of capillaries which are mutually parallel are arranged in the outer layer along the length direction, each capillary is connected with a plurality of capillary branch pipes, the inner diameter of each capillary branch pipe is smaller than that of the capillary, the opening of each capillary branch pipe faces the gel layer, and liquid can be conveyed into the gel layer by utilizing the capillary force of the capillary and the capillary branch pipes. The gel layer adopts hydrogel, the hydrogel has swelling property, and the volume can be increased after absorbing water. In this embodiment, because the relative positions of the first end and the second end of the tourniquet body are fixed, the hydrogel swells and increases the pressure on the skin of the limb, so that the two sides of the wound can be attached, and the wound healing efficiency is improved. In this example, vinyl alcohol (PVA) was used as the polymer monomer, methylene Bisacrylamide (MBAA) was used as the crosslinking agent, ammonium Persulfate (APS) was used as the initiator, and nano silver ions were dispersed in lactic acid and the crosslinking accelerator ascorbic acid (ASA) as the chelating agent. The gel layer contains 22.00. g of vinyl alcohol as polymer monomer, 0.12. g MBAA of covalent cross-linking agent, 0.185. g APS of initiator, 0.166. g ASA of cross-linking promoter, 0.08mol/L of nano silver ion cross-linking concentration and 10.66mol/L of lactic acid in 100. g solution. And (3) fully stirring and degassing the mixture, pouring the mixture into a mold, polymerizing for 1-1.5 hours under the water bath condition of 55-60 ℃, taking 10-15 mu L of tetramethyl ethylenediamine as a catalyst in the process, polymerizing PVA under the action of a cross-linking agent, an initiator and a cross-linking accelerator while chelating, and demolding the solidified hydrogel to obtain the gel layer. The first end is physically connected with the belt body and is provided with a base and first connecting edges, the four