RU217955U1 - Arctic first aid bag designed for packing and transporting thermolabile medicines and medical devices in conditions of extremely low temperatures down to -50oC - Google Patents

Abstract

Usage: in the services of emergency and military medicine in the conditions of the Arctic region and is intended to maintain the temperature regime of thermolabile drugs and medical supplies during transportation at extremely low temperatures. Objective: to improve the main operational characteristics and indicators of the HSS, such as the retention time of residual heat in the internal space of the HSS, by using a heat-insulating material with the lowest thermal conductivity coefficient (λ), as well as improving ergonomic characteristics for ease of use of the product in extremely low temperatures. Essence: SPP-A contains a body, which is a backpack in the form of a parallelepiped of two parts - a cover and a base, straps for fastening on the user's back. The body is made of an outer layer, hard inserts made of a polymeric material, insulation and an inner layer, while each layer of the backpack body is made trough-shaped and all of them are connected to each other, and the outer layer is made of polyurethane-coated fabric, a zipper with a warmed lining provides a closed inner bag space. Inside the case there is an insert with heat-insulating material and boxes made of textile materials in the form of a parallelepiped. Boxes are made of fabric with polyurethane coating, the inner layer of fabric is covered with heat-insulating material and covered with lining fabric. There are Velcro fasteners on the cover of the boxes for fixing the boxes on the mounting panel of the cover with the possibility of turning along the fastening line by 90°. On the outer side of the liner with heat-insulating material there are textile fasteners of the "Velcro" type, for fastening the liner inside the body of the bag. On the outer side of the fabric cover of the body there are pockets for placing thermochemical heaters, and on the outer cover there are fastening straps that convert the bag into a backpack. On the base of the case and on the front wall of the case cover there are attachment points in the form of quick-release buckles of the Fastex type and a MOLLE type system for attaching additional products, depending on the task.

Description

The Arctic First Aid Bag (hereinafter referred to as SPP-A) is designed for packing and transporting heat-labile medicines and medical devices in extremely low temperatures and will find effective use in emergency and military medicine services in the Arctic region.

The quality of most medicines and medical devices when exposed to the open air can deteriorate under the influence of low temperature, high humidity, and bright lighting. Some drugs decompose at low temperatures, which accelerate the removal of substance crystals from solutions, destroy colloidal and emulsion systems, and sometimes promote polymerization and other chemical processes. As a result of freezing and subsequent thawing, various drugs in liquid dosage form irreversibly change their physicochemical properties. The impact of low temperatures is especially dangerous for drugs, the freezing and thawing of which breaks the tightness of the consumer packaging.

Known device, accepted for supply by order of the Ministry of Defense of the Russian Federation No. 744 dated May 21, 2011 - "First Aid Bag (SPP)", registration certificate No. RZN 2013/1210.

The device contains a body, which is a backpack in the form of a parallelepiped of two parts - a cover and a base. Boxes in the form of a parallelepiped are placed inside the case. The boxes are made of soft textile materials and have "Velcro" type textile fasteners for fixing the boxes on the mounting panel of the bag body with the ability to rotate along the fastening line by 90°. On the outer side of the fabric cover of the body there are pockets for placing thermochemical heating pads, also on the outer cover there are straps for carrying in a position behind the back, converting the bag into a backpack.

The device cannot be used at extremely low temperatures in the Arctic region, since the device has a large number of "cold bridges", namely, an uncovered zipper, the absence of a layer of thermal insulation material, the use of fabrics and accessories that are not resistant to extremely low temperatures.

The closest technical solution to the proposed utility model and selected as a prototype is the device according to the patent of the Russian Federation No. 196998 "Thermal backpack" (publ. 03.24.2020 Bull. No. 9).

The thermal backpack contains a body with a lid attached to it and straps. The body and cover are made of outer layer, inner layer and insulation. Each layer of the body and cover of the thermal backpack is made trough-shaped and all of them are interconnected only in their upper parts, and the outer and inner layers are made of reinforced fabric with double-sided PVC coating. The lid provides a closed hermetic interior of the thermal backpack with a moisture-proof zipper.

The known device cannot be used in conditions of extremely low temperatures in the Arctic region for a long time, since the zipper lining provides only moisture protection and is at the same time a significant cold bridge at temperatures down to -50 ° C, which will lead to cooling and subsequent freezing of the contents through short period of time. The outer layer of reinforced fabric with double-sided PVC coating, resistant to temperatures down to -50°C, has a density of 900 g/ ^m2 , which leads to a significant increase in the weight of the product cover and reduces the mobility of the product in extremely low temperatures (up to -50°C).

The objective of the proposed technical solution is to improve the main operational characteristics and indicators of the "Arctic First Aid Bag (SPP-A)", such as the time of residual heat retention in the internal space of the SPP-A, through the use of a heat-insulating material with the lowest thermal conductivity coefficient (λ), and as well as increasing the mobility of operation through the use of polyurethane-coated fabric with the required wear resistance and the lowest density.

To solve this problem, a device is proposed - SPP-A, containing a body, which is a backpack in the form of a parallelepiped of two parts - a cover and a base, straps for fastening on the user's back. The body is made of an outer layer, hard inserts made of polymeric material, insulation and an inner layer, while each layer of the backpack body is made trough-shaped and all of them are connected to each other, and the outer layers are made of polyurethane-coated fabric, a zipper with a warmed lining provides a closed inner bag space. Inside the case there is an insert with heat-insulating material and boxes made of textile materials in the form of a parallelepiped. Boxes are made of fabric with polyurethane coating, the inner layer of fabric is covered with heat-insulating material and covered with lining fabric. There are Velcro fasteners on the cover of the boxes for fixing the boxes on the mounting panel of the cover with the possibility of turning along the fastening line by 90°. On the outer side of the liner with heat-insulating material there are textile fasteners of the "Velcro" type, for fastening the liner inside the body of the bag. On the outer side of the fabric cover of the case there are pockets for placing thermochemical heaters, and on the outer cover there are fastening straps that convert the bag into a backpack. On the base of the case and on the front wall of the case cover there are attachment points in the form of quick-release buckles of the Fastex type and a system of the M.O.L.L.E type for attaching additional products, depending on the task.

In contrast to the prototype, the SPP-A case is made of two elements - a lid and a base, on the outer surfaces of which there is an outer cover based on holofiber, an inner layer with Velcro-type textile fasteners and mobile boxes, the body of which is also made on the basis of holofiber, which allows you to use these boxes regardless of the bag in extremely low temperatures.

In addition, the outer layer of the body is made of fabric with a polyurethane coating "Kordon-500" KMF.

The essence of the proposed utility model lies in the fact that the design of the SPP-A bag allows you to save the residual heat of the internal space and the positive temperature of thermolabile drugs for up to 70 minutes in extremely low temperatures (minus 50 ° C) of the Arctic region, which is confirmed by bench tests. In FIG. Figure 5 shows a table of the dependence of the temperature of the internal space of the SSH-A on time and a graph of the dependence of the temperature of the cooling of the internal volume of the SSH-A on time (Fig. 6). At the same time, it is possible to increase the useful volume of the bag by using hinged side pockets located on the side (standard position) or back sides of the bag cover. As well as the use of additional equipment, which is fixed outside on the front wall of the bag using the M.O.L.L.E.

The use of new advanced heat-insulating materials and fabrics in this development is of great importance for solving the problem.

The use of heat-insulating materials based on holofiber in the internal volume of the boxes, which are installed on the insulated mounting panel of the case, can significantly increase the time of retaining residual heat, since the insulation based on holofiber has the lowest thermal conductivity coefficient among hygroscopic materials λ = 0.031 W/mK.

The use of mobile boxes with an individual thermal insulation system and fixing them on the mounting insulated panel of the SPP-A bag body helps to achieve the effect of a multilayer insulated shell, due to which uniform heat dissipation is achieved throughout the internal volumes of the boxes, as well as retaining residual heat when in extremely low temperature conditions.

The use of Kordon-500 KMF fabric in the color of the corresponding clothing fabric used in polar units with a polyurethane coating improves wear resistance, as well as windproof and water-repellent properties of the SPP-A outer cover. Plain weaving of polyamide threads of this fabric gives it strength and elasticity, does not allow possible cuts on the fabric to diverge. Water-repellent properties are ensured by coating with polyurethane, which is applied to the fabric in a hot way during production. This fabric is resistant to aggressive liquids (gasoline, diesel fuel, aviation kerosene, oils containing acids up to 90%), washing and dry cleaning (soda ash, washing powder, laundry soap). Also, the fabric "Kordon-500" KMF is resistant to solar reaction.

Isosoft 304 heat-insulating material was chosen as a heater for the SPP-A outer cover, since the fibers of this material are bonded with polymer crosslinks, the web density is 250 g/m ² , which provides better protection against negative temperatures while maintaining an acceptable level of hygroscopicity.

The essence of the proposed utility model is illustrated by drawings, where

figure 1 - layout of the main elements of the SPP-A (front view);

figure 2 - layout of the main elements of the SPP-A (rear view),

figure 3 - layout of the main elements of the SPP-A (open view);

figure 4 is a diagram of the shell cover SPP-A and the inner box;

figure 5 is a table of the dependence of the temperature of the internal space of the SPP-A on time when the product is in conditions of extremely low temperature minus 50 ° C,

figure 6 is a graph of the dependence of the temperature of the cooling of the internal volume of the SPP-A from time to time,

SPP-A (Fig. 1, Fig. 2, Fig. 3) contains: a body 1 made of two elements of a cover 2 and a base 3. To increase the usable volume of the bag, hinged pockets 14 can be fixed on the side walls of the body base. zippers 4 of the body 1, hanging pockets 2, have insulated lining 5 and cord grips 6. The base 3 has a handle 7 for carrying in the side position and straps 8 in the position behind the back. The back of the case 1 has damping pads 9. At the bottom of the base 3 there are boxes 10, which are fixed on the base with Velcro-type textile fasteners. On the side walls of the base 3 there is an insert with a heat-insulating material 11, which is fixed with Velcro-type textile fasteners. At the bottom of the lid 2 there is an organizer 12, which is fixed on the lid with Velcro-type textile fasteners. On the front wall of the case 1 there is a removable emblem "Red Cross" 13. The covers of the case 1, box 10, insert 11, (Fig. 4) are a three-layer structure consisting of an inner layer 15, a case insulation 16, an outer layer of the case 17.

Thus, due to the design features of the cover of the SPP-A case and the covers of the inner boxes, the use of advanced heat-insulating materials and fabrics as insulation, as well as design features - the presence of an insulated liner inside the volume of the bag, insulated linings and cord-grabs with zippers, improved the main operational characteristics and indicators of the Arctic First Aid Bag (SPP-A).

Claims (4)

1. Arctic first aid bag, designed for packing and transporting thermolabile medicines and medical devices in conditions of extremely low temperatures down to -50 ° C, containing a body, which is a backpack in the form of a parallelepiped, in two parts - a cover and a base, straps for fastening on the back of the user, zippers with insulated pads and grip cords, an insert with heat-insulating material is placed inside the case, boxes in the form of a parallelepiped made of textile materials with a polyurethane coating, the inner layer of the fabric is covered with heat-insulating material and closed with a lining fabric, while on the body of the boxes there are textile fasteners of the Velcro type for fastening the boxes with the possibility of turning along the fastening line by 90°, on the side of the insert with heat-insulating material there are textile fasteners of the Velcro type for fastening the insert inside the housing, external pockets for placing thermochemical heating pads, attachment points in the form of Fastex buckles and in the form M.O.L.L.E for attaching additional products, while the body is made of an outer layer, inserts of a polymeric material, insulation and an inner layer, each layer of the body is made trough-shaped and all of them are interconnected, and the outer layer is made of fabric with a polyurethane coating, also on the outer layer there are strap fastenings, made with the possibility of converting the bag into a backpack. 2. Arctic first aid bag according to claim 1, characterized in that the outer layer of the body is made of fabric with polyurethane coating "Kordon-500" KMF. 3. Arctic first aid bag according to claim 1, characterized in that the body insulation is made of Isosoft 304 heat-insulating material. 4. Arctic first aid bag according to claim 1, characterized in that the box body is made with heat-insulating material based on holofiber.

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