Artificial kidney with disposable dialysis liquid circuit
First Claim
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1. In an artificial kidney comprising:
- (a) a haemodialyser divided up into first and second compartments by a membrane making it possible to treat blood by dialysis and by ultrafiltration whereby the blood passes through the first compartment and the dialysis liquid passes through the second compartment,(b) hydraulic circuit means for causing the treated blood to flow in the first compartment,(c) hydraulic circuit means for preparing the dialysis liquid, storing it and causing it to flow in the second compartment,(d) hydraulic circuit means for removing and measuring amounts of liquid equal to the desired amounts of ultrafiltrate, and(e) means for controlling and checking the means (b) and (c), the controling and checking means being re-usable and grouped together on a console capable of being connected to an electricity supply, the improvement wherein the circulation pump corresponding to said hydraulic circuit means (c) is disposed upstream of the dialyzer and an automatic regulation device maintains at any time within the dialyzer the pressure of the dialysis liquid between the atmospheric pressure and the blood pressure, and furthermore wherein the dialysis liquid hydraulic circuit means (c) and the liquid removing and measuring hydraulic circuit means (d) are designed, manufactured and assembled as a disposable items.
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Abstract
An artificial kidney comprising a haemodialyser connected to a dialysis liquid circuit has the dialysis liquid circuit designed and simplified so as to be entirely disposable. Preferably, the haemodialyser and also all the circuits for the blood, for the dialysis liquid and for removing the ultrafiltrate are disposable. They can be delivered in a disposable container which can, during treatment, be used as a support and as a dialysis liquid reservoir. A small console includes the re-usable means for controlling and checking the artificial kidney, together with their electric circuits.
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Citations
8 Claims
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1. In an artificial kidney comprising:
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(a) a haemodialyser divided up into first and second compartments by a membrane making it possible to treat blood by dialysis and by ultrafiltration whereby the blood passes through the first compartment and the dialysis liquid passes through the second compartment, (b) hydraulic circuit means for causing the treated blood to flow in the first compartment, (c) hydraulic circuit means for preparing the dialysis liquid, storing it and causing it to flow in the second compartment, (d) hydraulic circuit means for removing and measuring amounts of liquid equal to the desired amounts of ultrafiltrate, and (e) means for controlling and checking the means (b) and (c), the controling and checking means being re-usable and grouped together on a console capable of being connected to an electricity supply, the improvement wherein the circulation pump corresponding to said hydraulic circuit means (c) is disposed upstream of the dialyzer and an automatic regulation device maintains at any time within the dialyzer the pressure of the dialysis liquid between the atmospheric pressure and the blood pressure, and furthermore wherein the dialysis liquid hydraulic circuit means (c) and the liquid removing and measuring hydraulic circuit means (d) are designed, manufactured and assembled as a disposable items. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification