Dsu Medical Corporation

Ting Ting Yu

William J Schnell

David S Utterberg

A tubular set is provided for the extracorporeal treatment of blood, for example hemodialysis. The set has a patient arterial line and a patient venous line, each line having a patient connector at one end thereof. Each patient line connects at its other end to a reversing flow valve. The valve also connects to respective first ends of a blood processing unit arterial line and a blood processing unit venous line. Each of the unit lines carry a connector at ends opposed to the first ends for connection respectively to arterial and venous ports of a blood processing device, typically a dialyzer. The reversing flow valve has a first position that respectively connects the patient and unit arterial lines with the patient and unit venous lines. The reversing flow valve has a second position that connects the patient arterial line with the unit venous line, and the unit arterial line with the patient venous line. Thus, blood flow between the two patient lines can be reversed without reversing flow through the two unit lines and the connected dialyzer. This permits the easy performance of dialysis access site patency tests, or may be used to avoid blood flow blockage in an implanted catheter.

Reversing flow blood processing system

A tubular set is provided for use with extracorporeal treatment of blood. The set comprises: a flow reversing valve having a patient arterial line and a patient venous line each separately connected to one side of the valve. A unit arterial line and a unit venous line are each separately connected to the other side of the valve. The patient arterial line connects with the unit arterial line in a first position of a valve, and the patient venous line connects with the unit venous line in the same first valve position. The patient arterial line connects with the patient venous line in a second position of a valve, while the patient venous line connects with the unit arterial line in the same second valve position. The flow reversing valve is movable between the first and second positions by relative rotation of part of the valve and adjacent portions of the respective lines.

Reversing flow blood processing system having reduced clotting potential

A tubular set is provided for the extracorporeal treatment of blood, for example hemodialysis. The set comprises a patient arterial line and a patient venous line, each line having a patient connector at one end thereof. Each patient line connects at its other end to a reversing flow valve. The valve also connects to respective first ends of a blood processing unit arterial line and a blood processing unit venous line. Each of the unit lines carry a connector at ends opposed to the first ends for connection respectively to arterial and venous ports of a blood processing device, typically a dialyzer. The reversing flow valve has a first position that respectively connects the patient and unit arterial lines with the patient and unit venous lines. The reversing flow valve has a second position that connects the patient arterial line with the unit venous line, and the unit arterial line with the patient venous line. Thus, blood flow between the two patient lines can be reversed without reversing flow through the two unit lines and the connected dialyzer. This permits the easy performance of dialysis access site patency tests, or may be used to avoid blood flow blockage in an implanted catheter.

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Grayslake, IL, United States of America

Ting Ting Yu