VARIABLE-VOLUME COMPENSATOR FOR BLOOD PURIFICATION Russian patent published in 2013 - IPC A61M1/14 

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment. A compensator comprises a holder, a cavity and a membrane, The cavity 2 is mounted on the holder 1. The first 3 and second 3 membranes are mounted in the cavity 2 and spaced from each other. The interior of the cavity 2 is divided into the first cavity 5, the second cavity 6 and the silicone oil cavity 7 for by the membranes. The silicone oil cavity 7 is provided between the first 3 and second 4 membranes and connected with a reciprocating-piston pump 9. The through holes 2c are formed in the wall of the first cavity 5 and connected to input connections of the first three-way electromagnetic valve 10. The conductive through holes 2d are made in the wall of the second cavity 6 and connected to the input connections of the second three-way electromagnetic valve 11. The cavity 2 is formed by fastening the left 2a and right half-bodies. A crimp ring 12 with a through hole at its upper end is placed between the flanges of the membranes 3 and 4. The crimp ring 12 and the flanges of the membranes 3 and 4 are rigidly fixed by the half-bodies 2a and 2b. A connector 13 is fixed on the upper part of the crimp ring 12 through a clamping plate 14. The pump 9, an inner passage of the connector 13, the through hole and the silicone oil cavity 7 are connected in series.

EFFECT: higher reliability and efficiency.