SU1437029A1 - Blood microfilter - Google Patents

Abstract

This invention relates to the field of medicine and medical technology, c. in particular, for transfusiology and perfusion, and can be used A-A but for blood transfusion and for various types of perfusion. The purpose of the invention is to simplify the microfilter. The micro filter contains a housing 1 with diametrically located connections 2 and 3 for entering and withdrawing blood, respectively, a volume filter element 4 located in housing 1 with the formation of cavities 5 and 6 for unfiltered blood and for filtered blood, respectively, non-woven polymeric meshes 7 " 8, the Case 1 is made of two interconnected and with a filtering element 4 along the perimeter of the sheets of an elastic polymeric material. With high filtration characteristics, the device has a simplified design, facilitating its manufacture, 3 sludge. (Ls

Description

output 3 blood, respectively, and dia-tQ between the walls of the elastic body 1

drove the cells coincide with the wasps. many pipes 2 and 3, the lines shift

unfiltered blood current from the center

4, the element 4 to the periphery

cavities 5. This provides smuanne jj

not blood of filtered particles and

moving them to boundary areas

1 micro4) iltra. It reduces

plugging the pores of the filter element

and the filter element 4 and directed from the input to the periphery of the movement of blood.

The blood microfi firat model was made using, as in the prototype device, a nonwoven fabric made of polyester fiber with silicon coating thickness

between the walls of the elastic body 1

and the filter element 4 and directed from the input to the periphery of the movement of blood.

A blood microfiper layout was made using, as in the prototype device, for a bulk filter element of a nonwoven fabric made of mylar fibers with a silicon coating of a thickness of

3.5-4.0 mm. The case was made of a thermoplastic polymer film. The non-woven (extrusion) mesh had a thickness of 1.6 mm. The manufacture of the microfilter was carried out by thermal welding of the housing material with a filtering element around the perimeter of the device. Nozzles for blood inlet and outlet in the form of polymer tubes were welded into the appropriate places of the housing. The manufacture turned out to be non-labor-intensive even under laboratory conditions and was reduced to compression with heating of the polymer package around the perimeter.

Tests of the proposed blood microfilter showed that it had the same filtration efficiency as the prototype, with the same surface area and thickness of the helper element. The hydraulic resistance of the proposed device does not exceed 0.25 kPa at a flow rate of 100 ml / min. When a microfilter is installed in a standard PC-11-05 blood transfusion system, the ability to manually pump blood greatly facilitates filling the system with blood and provides ease of perfusion.

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Editor M.Tovtin Order 5816/7

Fal.Z

Compiled by O. Kabanov

Tehred M.Didyk Proofreader M.Maksimishinets

Circulation 541

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Thus, this device has identical with known filtration characteristics, but it has a simpler design that facilitates its manufacture.

Claims (1)

Formula Shadows A blood microfilter comprising a housing with diametrically disposed connections for blood inlet and outlet and a volumetric filter element disposed in the housing to form cavities for unfiltered blood and for filtered blood, characterized in that the housing is made of two interconnected and a filter element around the perimeter of the sheets of an elastic polymeric material; in the cavity for unfiltered and filtered blood, non-woven polymeric nets with thicknesses from 1/2 to 1/4 of the thickness of the filter element with a cell size of 4-10 mm diagonally, and the diagonal of the grid cells in the cavity for unfiltered blood coincide with the axes of the nozzles for entry and discharge of blood. Subscription