Byron W Larson
Engineers at Braun Ct, Arvada, CO

5647984, Jul 15, 1997

Jun 7, 1995

8/477491

Roy S. Hovland - Denver CO
Byron W. Larson - Arvada CO
Jo-Ann B. Maltais - Morrison CO

COBE Laboratories, Inc. - Arvada CO

A61M 114, B01D 6130

210420

An extracorporeal fluid treatment apparatus which is selectively operable in a disinfecting mode or a treatment mode includes an inlet line, a pre-treatment portion, an input pump, a heater, an input shunt, a filtration device, a post-treatment portion, a drain line and an output shunt. The apparatus also includes a combination of valves which are selectively positionable in disinfecting mode to create an input fluid circuit which includes the pre-treatment portion and the input shunt, and which is in fluid isolation from the post-treatment portion and from the filtration device. In disinfecting mode, the valves are also selectively positionable to create an output fluid circuit which includes the post-treatment portion and the output shunt, and which is in fluid isolation from the pre-treatment portion and from the filtration device. In disinfecting mode, a heated input fluid is circulated in the input fluid circuit and a heated output fluid is circulated in the output fluid circuit until disinfection of each of the input and output fluid circuits is achieved. The apparatus optionally includes a heat exchanger through which heat is transferred while in disinfecting mode from the input fluid in the pre-treatment portion to the output fluid in the post-treatment portion.

5733457, Mar 31, 1998

Dec 5, 1996

8/760480

Roy S. Hovland - Denver CO
Byron W. Larson - Arvada CO
Jo-Ann B. Maltais - Morrison CO

COBE Labortories, Inc. - Lakewood CO

A61L 200, A61M 114, B01D 6130

210636

An extracorporeal fluid treatment apparatus which is selectively operable in a disinfecting mode or a treatment mode includes an inlet line, a pre-treatment portion, an input pump, a heater, an input shunt, a filtration device, a post-treatment portion, a drain line and an output shunt. The apparatus also includes a combination of valves which are selectively positionable in disinfecting mode to create an input fluid circuit which includes the pre-treatment portion and the input shunt, and which is in fluid isolation from the post-treatment portion and from the filtration device. In disinfecting mode, the valves are also selectively positionable to create an output fluid circuit which includes the post-treatment portion and the output shunt, and which is in fluid isolation from the pre-treatment portion and from the filtration device. In disinfecting mode, a heated input fluid is circulated in the input fluid circuit and a heated output fluid is circulated in the output fluid circuit until disinfection of each of the input and output fluid circuits is achieved. The apparatus optionally includes a heat exchanger through which heat is transferred while in disinfecting mode from the input fluid in the pre-treatment portion to the output fluid in the post-treatment portion.

5624572, Apr 29, 1997

Jun 7, 1995

8/485114

Byron Larson - Arvada CO
Frank Ogawa - Lakewood CO

Cobe Laboratories, Inc. - Lakewood CO

B01D 6132

210746

The amount of electrical power delivered to a dialysate heater in the dialysis machine is maximized without substantially exceeding a predetermined maximum allowed power consumption for the dialysis machine. The instantaneous power consumed by the machine is measured and compared to the maximum allowed power consumption. The excess of power beyond the instantaneous power consumed up to the maximum allowed power consumption is then made available to the heater. The worst case power consumption limitations of the dialysis machine components do not adversely affect the heat available from the heater. The rate at which dialysis treatments may progress may increase or the time required for dialysis treatments may decrease.