FI87533C - TRANSFUSIONS OCH INFUSIONSVAETSKEVAERMARE - Google Patents

Description

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TRANSFUSION AND INFUSION FLUID HEATER

When transferring blood and fluid to patients who need it, the blood or fluid must be warmed to avoid deterioration of the patient's condition. Blood products should be stored below 10 ° C and infusion fluids are usually at room temperature. In small amounts, given to relatively fit patients, heating fluids is not always necessary. Conversely, if the patient is severely injured, e.g., large open wounds with high heat loss from the body, or the patient is exposed to cold outside air, administration of cold infusion or transfusion fluids may lead to serious consequences such as cardiac arrhythmias.

In hospital settings, the problem has been solved in different ways. The simplest method is to immerse the blood or infusion bag in a warm water bath. Instead of a water bath, there are also various heating cabinets and microwave devices for heating liquids. The disadvantage is that the liquid has time to cool slightly in the transfer device on the way from the bag to the patient. Another alternative is that the blood or fluid bag is not heated, but a plastic coil is connected to the transfer device, which leads from the bag of fluid to the patient, through which the fluid flows. The plastic coil is in a water bath heated by a special heating device. In another version, the water bath is replaced with a grooved metal cylinder blade around which a plastic coil is wound. When used, the device heats a metal cylinder, which in turn transfers 2,87533 of heat to the fluid flowing in the plastic coil.

Common to all the above heating methods is the need for external energy, i.e. electricity or hot water must be available.

This limits the use of heaters in use today, mainly for interiors and ambulances. First aid for victims of accidents, disasters and crises, especially in cold conditions, must be given unheated blood and infusion fluids or cannot be given at all. This disadvantage can be eliminated by a heater which does not require external energy and which provides sufficient heat to heat the required amount of liquid. Corresponding heaters with different technical implementations appear in technical publications, e.g. from the United States pat. No. 4,796,696, from the Federal Republic of Germany pat. No. P 25 15 889.8 and from Switzerland pat. No. 467611.

The principle of operation of the transfusion and infusion fluid heater in question is based on the exothermic reaction of two or more substances, the heat generated by which is used to heat the liquids, in a manner characteristic of the invention in the characterizing part of the claim.

The heater consists of a box (1) with a tubular coil (2) inside and with inlet and outlet pipes outside the box.

The top cover of the box has a hole covered by a thin film (3). Above the hole is a container (4) made of elastic material, which is attached to the lid of the box (1). The tank (4) is protected by a protective hood (5) made of hard material, which is removed when the heater is put into operation.

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Before using the heater, separate the thin film (3) covered by the hole from the substances in the box and the tank. When the heater is put into operation, remove the protective cap (5) and press the container (4) until the thin film (3) covering the hole bursts and the substance from the container (4) enters the box (1).

Shaking the box causes the substances to mix and an exothermic reaction to occur.

The heater is of great importance in accident sites, such as car accidents, where the injured person is trapped and first aid measures must be started immediately. Similar situations are accidents, for example in industrial plants and in terrain, where first aid measures must be started before the patient is transferred. The heater is also used in a disaster area caused by an earthquake, for example, in which case access to external energy is cut off. In the event of a crisis, for example, the Defense Forces will benefit greatly from a transfusion and infusion fluid heater that operates without external energy.

Claims (1)

4,87533 PATENT CLAIMS. Transfusion and infusion fluid heater in which the thermal energy required to heat the transfusion and infusion fluids is provided by the heat given off by an exothermic reaction between two or more substances and comprises a box (1) with a tubular coil (2) characterized by a hole in the box lid cover the thin film (3) and above the film there is a container (4) made of elastic material covered by a removable protective cap (5), and that the box (1) and the container (4) are filled with two or more exothermic reactants separate the membrane (3), by puncturing which the substances in the container (4) can mix with the substances in the box to effect an exothermic reaction. 5 87533 Transfusions and infusions of infusions, so that uterttjar den värmeenergi som uppstär av en exothermic reaction is followed by eHer flere ämnen, för att uppvärma transfusions och infusions-vätskor. Värmaren bestär av en dosa (1) som innehäller en spiral (2) och kännetecknas av att i dosans lock f Inns en öppning som är täckt av h price (3) ocanför kaina f Inns en behällare av elastic material (4) som is not available in the field (5) and in the field (1) and in the body (4) in the case of or in the form of an exothermic reaction and in the case of the difference between the price (3) and the genome of the price (3) ) can be used in combination with exothermic reactions (4) and in contact with exothermic reactions.