Dialysis apparatus for independently controlling the concentration of at least two ionic substances inside a patient's body
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United States of America Patent
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Sep 23, 2003
Issued Date -
N/A
app pub date -
Jun 12, 2001
filing date -
Aug 21, 1997
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Abstract
A dialysis apparatus includes a dialysis liquid circuit for circulating sodium chloride and sodium bicarbonate through a haemodialyzer and a circuit for infusing a patient with at least one solution containing at least one ionic substance 'A' absent from the dialysis liquid. The substance 'A' has a determined concentration (A)sol in the infusion solution. A dialysance detector determines the actual dialysance 'D' of the haemodialyzer for sodium, and a flow rate detector determines the flow rate Qinf of infusion solution such that the concentration of the substance 'A' inside the patient's body tends towards a desired concentration (A)des, as a function of the dialysance 'D', the concentration (A)sol of the substance 'A' in the infusion solution and the desired concentration (A)des, A regulator regulates the flow rate of infusion solution, and a controller drives the regulator to control the flow rate of the infusion solution such that this flow rate is substantially equal to the determined flow rate Qinf.
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