Patent ID: 7704221
Filing Date: 2010-04-27
Classification: A61M,Y10T

Abstract:
1. A rotary valve unit for blending hot and cold fluid sources to regulate a temperature of fluid flowing to a heat exchange unit in an extracorporeal blood perfusion circuit comprising: a valve body comprising: a wedge-shaped rotary valve disposed within the valve chamber, the rotary valve being rotatable within the valve chamber for controlling a blending of the cold fluid entering the valve chamber from the first inlet port and the return fluid from the heat exchange unit entering the valve chamber from the second inlet port to regulate the desired temperature of fluid provided to the heat exchange unit, the wedge-shaped rotary valve being positionable to provide either only the cold fluid to the first outlet port, only the return fluid to the first outlet port, or a blending of the cold fluid and return fluid to the first outlet port.