초록 ▼

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

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.

대표청구항 ▼

An apparatus for balancing the fluids withdrawn from a patient and the fluids simultaneously returned into the patient, comprising first pump means having a pump inlet and a pump outlet, measuring chamber means (2) for measuring a quantity of fluid withdrawn from the patient by said pump means, firs

An apparatus for balancing the fluids withdrawn from a patient and the fluids simultaneously returned into the patient, comprising first pump means having a pump inlet and a pump outlet, measuring chamber means (2) for measuring a quantity of fluid withdrawn from the patient by said pump means, first conduit means (1) operatively connecting an inlet of said measuring chamber means (2) to a patient for withdrawing fluid from the patient into the measuring chamber means, second conduit means (3) operatively connecting an outlet of said measuring chamber means to said pump inlet for withdrawing fluid from the measuring chamber means, third conduit means (5) connected to said pump outlet to discharge fluid, supply container means (11), second pump means also having respective pump inlet means and respective pump outlet means, fourth conduit means (12) operatively connecting said supply container means (11) to said pump inlet means of said second pump means and fifth conduit means (13) operatively connecting said pump outlet means of said second pump means to a patient for returning fluid into a patient, first motor means (6) operatively connected to said first and second pump means for driving said first and second pump means in unison, said conduit means comprising respective conduit sections operatively arranged for pumping fluid therethrough in unison by said first and second pump means, and control means (7, 8, 9) operatively responsive to the rise and fall of the filling level in said measuring chamber means (2) and operatively connected to said first motor means (6) for controlling the speed of operation of said first and second pump means in response to the filling level in said measuring chamber means, whereby the fluid withdrawal and fluid return take place simultaneously while the withdrawal rate and the return rate are continuously balanced relative to each other during treatment so that withdrawing excessive liquid quantities from the patient is prevented.