Importance

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Abstract

Apparatus for removing fluid from and supplying fluid to the human body in substantially equal quantities includes a double tube pump (1), a measuring chamber (2), and a supply container (4), the pump being arranged to deliver fluid from the supply container to the body by a line (13) while removing fluid at an equal rate from the measuring chamber, which receives fluid from the body by a line (1). The measuring chamber is provided with sensing means (8,9) which supply signals in response to variations in the level of fluid in the measuring chamber to a controller (7) which controls the pump motor speed. For use in diuresis and haemofiltration, an additional single pump (14) in a discharge line (16) from the measuring chamber is controllable by a device (18) to remove excess fluid from the measuring chamber. The double pump is the same as that described in U.S. Pat. No. 4,108,575.

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First Claim