DIALYSIS METHOD AND APPARATUS
First Claim
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1. A method of dialytic blood conditioning of a patient'"'"''"'"'s blood in which the blood is continuously removed from the patient'"'"''"'"'s bloodstream, circulated through a dialytic exchange member and returned to said bloodstream;
- characterized in that said exchange member comprises inner and outer semipermeable tubing members concentrically disposed in an elongated tubular chamber, said blood being circulated through a first annular space between said tubing members, dialyzing fluids being circulated through the said inner tubing member and a second annular space surrounding said outer tubing member, said dialyzing fluid being returned to a reservoir where it is treated by dialysis with a secondary dialyzing fluid, being circulated from a second reservoir.
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Abstract
A method of dialytic conditioning of blood in which the blood is continuously circulated through a dialytic exchange member comprising an elongated tubular chamber having at least one semipermeable tubing member longitudinally disposed therein. In a preferred embodiment a plurality of semipermeable tubes are concentrically disposed in the tubular chamber, allowing circulation of blood and one, two or more dialysis fluids simultaneously.
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Citations
3 Claims
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1. A method of dialytic blood conditioning of a patient'"'"''"'"'s blood in which the blood is continuously removed from the patient'"'"''"'"'s bloodstream, circulated through a dialytic exchange member and returned to said bloodstream;
- characterized in that said exchange member comprises inner and outer semipermeable tubing members concentrically disposed in an elongated tubular chamber, said blood being circulated through a first annular space between said tubing members, dialyzing fluids being circulated through the said inner tubing member and a second annular space surrounding said outer tubing member, said dialyzing fluid being returned to a reservoir where it is treated by dialysis with a secondary dialyzing fluid, being circulated from a second reservoir.
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2. Apparatus for dialytic conditioning of a fluid comprising:
- a dialytic exchange member comprising an elongated tubular chamber having at least two concentric semipermeable tubing members, longitudinally and concentrically disposed therein;
control and connector means at each end of said exchange member for circulating said fluid through said exchange members for conditioning thereof;
dialyzing fluid reservoir means; and
flow means connected to said reservoir means and said exchange member for circulating dialyzing fluid from said reservoir means through said exchange member;
said reservoir means comprising a first reservoir containing a first dialyzing fluid and a second reservoir containing a second dialyzing fluid, said reservoirs being connected by a flow loop partially comprising a semipermeable exchange membrane whereby dialysis takes place between said first and second dialyzing fluids.
- a dialytic exchange member comprising an elongated tubular chamber having at least two concentric semipermeable tubing members, longitudinally and concentrically disposed therein;
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3. A method of dialytic conditioning of a patient'"'"''"'"'s blood in which the blood is continuously removed from the patient'"'"''"'"'s bloodstream, circulated through a dialytic exchange member and returned to said bloodstream;
- characterized in that said exchange member comprises inner, intermediate and outer semipermeable tubing members concentrically disposed in an elongated tubular chamber, said blood being circulated through a first annular space between said inner and intermediate tubing members, dialyzing fluids being circulated through the said inner tubing member and a second annular space surrounding said intermediate tubing member, a secondary dialyzing fluid being circulated through a third annular space, said outer tubing member defining the interior thereof, for dialysis of the dialyzing fluid in said second annular space.
Specification