RU26934U1 - THERMAL INSULATING COVER FOR TREATING EXTREMITAL FREEZERS IN PREACTIVE AND EARLY REACTIVE PERIODS - Google Patents

Abstract

A heat-insulating cover for the treatment of frostbite of the extremities in the pre-reactive and early reactive periods, containing a layer of cotton wool coated with oilcloth, characterized in that it contains two layers of cotton, the outer and the inner, and the thickness of the outer is three times the thickness of the inner, between the layers of cotton there is a heat storage insert a cellular structure filled with a substance that allows thermal insulation of the affected segment of the limb for 24 hours, designed to restore the temperature of the affected tissues for physiological parameters, as well as equipped with a fixing cuff from the proximal end to secure the heat-insulating cover to the limbs, and from the distal end with a connecting element that closes the entrance for insertion of the heat storage insert into the cover.

Description

Thermal insulating cover for the treatment of frostbite of the extremities in pre-reactive and

early reactive periods

The utility model relates to the field of medicine, to traumatology, specifically to devices used for the treatment of frostbite of the extremities in the pre-reactive and early reactive periods.

A device is known that is used to treat frostbite of the extremities in the pre-reactive and early reactive periods, which is a multi-layer cotton-gauze dressing, as well as a dressing based on foam rubber. However, the thermal insulation time of such a device does not exceed four to six hours, which is insufficient for effective treatment, and the surface is quickly contaminated, which limits its repeated use.

The closest in technical essence to the proposed one is the unified heat-insulating cover (UTICH), which is a heat-insulating dressing made of cotton or batting 5 cm thick, coated on top with an oilcloth base, which provides thermal insulation of the damaged limb segment for a period of up to eight hours, is easily cleaned of dirt, exposed disinfection, decontamination, degassing, can be used repeatedly after special treatment.

However, the indicated unified heat-insulating cover has a very significant drawback: it provides thermal insulation of the damaged segment of the limb for up to eight hours, while the thermal insulation time for effective treatment should be at least 24 hours.

The objective of the invention: improving the effectiveness of treatment by increasing the temporary exposure of thermal insulation of the damaged segment of the limb.

This technical problem is solved by the use of a new heat-insulating cover for the treatment of frostbite of the extremities in the pre-reactive and early reactive periods, containing a layer of cotton wool coated with oilcloth, and it contains two layers of cotton, the outer and inner, and the thickness of the outer layer is three times the thickness of the inner, and between the layers there is a mesh-accumulating mesh insert filled with a substance that allows thermal insulation of the affected limb segment for 24 hours, designed to restoring the temperature of affected taunas to physiological parameters, and is also equipped with

SHSh15319

i

.., V - / - 0;: BV, v2 vv l; V v vv,

IPC: A 61F7 / 00 7/03 7/10

the proximal end with a retaining cuff to secure the heat-insulating cover to the limbs, and with a distal connecting element that closes the entrance for insertion of a teshuaccumulative insert into the cover.

In FIG. 1, 2 shows a heat-insulating cover, consisting of the outer (1) and inner (2) layers of cotton wool, between which there is a heat-accumulating insert of a cellular structure (3), and also from the proximal end the cover is equipped with a fixing cuff (4) for fixing it to the extremities, with a distal one - a connecting element (5) that closes the inlet for introducing a heat storage insert into the cover.

The proposed heat-insulating cover for the treatment of frostbite of the extremities in the pre-reactive and early reactive periods is used as follows: upon receipt of the victim at the stage of medical evacuation (or when providing medical care both in the field and in peacetime) in the pre-reactive period or the first two for three hours of the early reactive period, the affected segment of the limb is treated with an antiseptic solution, between the outer and inner layers of the thermoiso. a mummy insert, after which the affected segment of the limb is placed in a heat-insulating cover, which is plugged from the distal section with a connecting element, the cover is fixed on the limb segment by means of a fixing cuff.A special therapy course is carried out for 24 hours aimed at restoring blood flow in the damaged area, after whereby the heat-insulating cover is removed and clinically performed “) assessment of the viability of damaged tissues.

One of the stages of creating the proposed design was the implementation of heat engineering calculations. As a substance filling the heat storage insert, for example, water was used. Thermotechnical calculations showed that the use of a heat-accumulating insert allows to completely stop the flow of heat to a frostbitten limb for a given period of time, which is determined based on the degree of frostbite. The duration of the heat storage insert depends on its thickness, i.e. the amount of ice in the cells, as well as the thickness of the outer layer of cotton wool. The operation of the insert is based on the principle of using the heat of the phase transition of ice into water, because when ice melts, a significant amount of thermal energy is absorbed and the temperature of the resulting water will remain constant and equal to the temperature of melting, until all the ice has melted. By changing the thickness of the outer layer of cotton wool and the amount of ice contained in the cells, it is possible to regulate the time required to melt this ice, and thereby ensure the necessary period of time required to restore adequate

ga

temperature of a frostbitten limb when it warms up from the inside. Such a delay in the arrival of the heat flux in time to the frostbitten limb cannot be achieved using heat-insulating dressings of known designs.

To lower the melting point of ice in the heat storage insert and to extend the thermal insulation time, not pure water can be used as a liquid, but, for example, an alcohol-water solution with a known freezing temperature or another liquid suitable for sanitary-hygienic and operational conditions.

The performed thermal engineering calculations made it possible to determine the dimensions of the heat-insulating cover with a heat storage insert (filling - ice, melting point - 0 ° C) under the following conditions:

- TAB action time (complete absence of external heat input to the frostbitten limb) - 24 hours;

- Ambient air temperature - 20 ° С;

- temperature of a frostbitten limb - minus 4 ° C;

- the thickness of the inner layer of cotton wool - 10 mm;

- the average thickness of the ice layer is 9 mm;

- the thickness of the outer layer of cotton wool is 30 mm.

Thus, the proposed device can improve the effectiveness of treatment, reduce treatment time, reduce the number of complications and the percentage of disability of victims.

Claims (1)

A heat-insulating cover for the treatment of frostbite of the extremities in the pre-reactive and early reactive periods, containing a layer of cotton wool coated with oilcloth, characterized in that it contains two layers of cotton, the outer and the inner, and the thickness of the outer is three times the thickness of the inner, between the layers of cotton there is a heat storage insert a cellular structure filled with a substance that allows thermal insulation of the affected segment of the limb for 24 hours, designed to restore the temperature of the affected tissues for physiological parameters, as well as equipped with a fixing cuff from the proximal end to secure the heat-insulating cover to the limbs, and from the distal end with a connecting element that closes the inlet for introducing the heat storage insert into the cover.