SU1731233A1 - Drop filter device for blood transfusion system - Google Patents

Abstract

This invention relates to medicine. The purpose of the invention is to increase the filtering ability and reduce the consumption of materials. The droplet-filtering device includes a housing, a frame filter with folds, sleeves 11 and 12. On the mounting sleeve 11, made in the form of a cylinder with an outer annular protrusion, there is a lock-protective sleeve 12, also made in the form of a cylinder, but with an internal protrusion. 4 il.

Description

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The invention relates to medicine, in particular, to systems for blood transfusion, and can be used to filter the blood.

The aim of the invention is to increase the filtration capacity and reduce the consumption of materials.

FIG. 1 shows a longitudinal section of the drip-filtering device; in fig. 2 and 3 - section of the filtering unit; in fig. 4 - cross section of the filtering unit (form of folds).

The drip-filtering device contains a polymer needle 1 and a dropper 2, in which there is a filter unit 3. The upper cut 4 of the filter unit is 25 mm below the point 5 connecting the dropper body to the polymer needle. A distance of 25 mm is necessary to control the number of drops and the rate of transfusion of the liquid.

The filter unit 3 has the shape of a truncated cone, the lateral surface of which is formed by filtering cloth 6 on the frame 7. The latter is made in the form of the lower 8 and upper 9 rings connected by four racks 10, and the ratio of the diameters of the lower ring to the upper one is from 1-2 to 1 -3. The filtering surface is formed by eight opposing and eight byte folds, which are fixed on the frame 7 by the fixing sleeve 11, the one-porn protective sleeve 12 is located on the fixing sleeve 11.

Drip-filtering device blood transfusion system works as follows. The polymer needle 1 is connected to the polymer container or glass bottle and pressed on the dropper 2 is filled with blood until the filter unit 3 is completely wetted with blood. The process of filtering the blood begins with a decrease in the level of the liquid in the container or bottle due to hydrostatic pressure. In this case, the blood passes through the tissue 6 into the gap between the dropper and the filter unit 3 and further to the recipient,

The use of the drip-filtering device of the blood transfusion system provides the most complete use of the surface of the filter tissue during

minimum dropper size and allows a significant increase in filtration capacity (filtration coefficient is 76%). In addition, the proposed construction provides

elimination of mechanical particles on the filter. Reducing the dimensions of the dropper leads to a decrease in material consumption. The benefits listed above provide enhanced

indicators of the quality of the blood transfusion system.

Claims (1)

Invention Formula Drip-filtering device for the blood transfusion system, containing a filter assembly with a pleated filter fixed on it, mounted in a housing with inlet and outlet openings and fixed with annular protrusions on the inner surface of the housing, characterized in that, in order to increase the filtration capacity and reduce material consumption, the filter assembly is made on the basis of a conical frame in the form of an input sleeve and an output ring connected by ribs, the filter consists of a two-layer filter fabric, formed with T-shaped folds, variable width along the generatrix of the conical frame, the edges of which are clamped between the frame inlet sleeve and an additional mounting sleeve, made in the form of a cylinder with an outer annular a protrusion along the lower end, in this case, an additionally inserted safety collar in the form of a cylinder with an inner annular protrusion on the upper end is mounted on the fastening sleeve, while the outer annular protrusion of the fastening sleeve abuts on the lower fastening protrusion of the housing, - but-protective sleeve, i - h  - xx- G e # P I f //: Fy