Patent ID: 7854718
Filing Date: 2010-12-21
Classification: A61M,F04B

Abstract:
1. A completely wearable artificial kidney (WAK) device comprising: a blood circuit; a dialysate circuit; a dual channel pulsatile pump comprising: a first channel for pumping the blood through said blood circuit and a second channel for pumping dialysate through said dialysate circuit; each of said first channel and said second channel comprising: a peristaltic tube that is compressible, said peristaltic tube having an input end and an output end; an input valve at the input end, said input valve comprising an input o-ring, an input ball adapted to seat against said input o-ring to stop fluid back flow through said input valve and an input spring member adapted to position said input ball against said input o-ring when the peristaltic tube is being compressed, said input spring member further adapted to allow the input ball to move away from said input o-ring and allow forward fluid flow through said input valve when said peristaltic tube decompresses, said input spring member comprises: an output valve at said output end, said output valve comprising an output o-ring, an output ball adapted to seat against said output o-ring to stop fluid back flow through said output valve and an output spring member adapted to position said output ball against said output o-ring when the peristaltic tube is being decompressed, said output spring member further adapted to allow the output ball to move away from said output o-ring and allow forward fluid flow through said output valve when said peristaltic tube is being compressed; and a single electric motor and transmission that alternately compresses and decompress the peristaltic tube in said first channel and said peristaltic tube in said second channel; said dialysate circuit, said blood circuit, and said WAK adapted to be completely worn by said user.