Hemodialysis systems and methods
First Claim
1. A hemodialysis system, comprising:
- a blood flow path through which untreated blood is drawn from a patient, passed through a dialyzer, and returned to the patient;
one or more dialysate flow paths through which dialysate flows to or from the dialyzer, the dialyzer permitting dialysate to pass from the dialysate flow path to the blood flow path;
a gas supply in fluidic communication with the dialysate flow path, anda valve interposed between the gas supply and the dialysate flow path, whereinthe system is configured to allow the valve to open upon loss of electrical power to the system to introduce a gas supplied by the gas supply into the system to displace dialysate in the dialysate flow path through the dialyzer and into the blood flow path to urge blood in the blood flow path back to the patient.
1 Assignment
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Accused Products
Abstract
Disclosed are hemodialysis and similar dialysis systems including fluid flow circuits. Hemodialysis systems may include a blood flow path, and a dialysate flow path including balancing, mixing, and/or a directing circuits. Preparation of dialysate may be decoupled from patient dialysis. Circuits may be defined within one or more cassettes. The fluid circuit and/or the various fluid flow paths may be isolated from electrical components. A gas supply may be provided that, when activated, is able to urge dialysate through the dialyzer and blood back to the patient. Such a system may be useful during a power failure. The hemodialysis system may also include fluid handling devices, such as pumps, valves, mixers, etc., actuated using a control fluid. The control fluid may be delivered to the fluid handling devices using a detachable external pump. The fluid handling devices may have a spheroid shape with a diaphragm dividing it into two compartments.
538 Citations
23 Claims
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1. A hemodialysis system, comprising:
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a blood flow path through which untreated blood is drawn from a patient, passed through a dialyzer, and returned to the patient; one or more dialysate flow paths through which dialysate flows to or from the dialyzer, the dialyzer permitting dialysate to pass from the dialysate flow path to the blood flow path; a gas supply in fluidic communication with the dialysate flow path, and a valve interposed between the gas supply and the dialysate flow path, wherein the system is configured to allow the valve to open upon loss of electrical power to the system to introduce a gas supplied by the gas supply into the system to displace dialysate in the dialysate flow path through the dialyzer and into the blood flow path to urge blood in the blood flow path back to the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification