| US 7,556,611 B2 | ||
| Extracorporeal blood processing apparatus with pump balancing | ||
| Jeremy Kolenbrander, Brighton, Colo. (US); William Palsulich, Lakewood, Colo. (US); James Ladtkow, Broomfield, Colo. (US); Dave Tyler, Lakewood, Colo. (US); Jeffrey A. Steward, Lakewood, Colo. (US); Dave Gibbons, Highlands Ranch, Colo. (US); and John R. Lindner, Morrison, Colo. (US) | ||
| Assigned to CaridianBCT, Inc., Lakewood, Colo. (US) | ||
| Filed on Nov. 28, 2006, as Appl. No. 11/563,898. | ||
| Claims priority of provisional application 60/745051, filed on Apr. 18, 2006. | ||
| Prior Publication US 2007/0243990 A1, Oct. 18, 2007 | ||
| Int. Cl. A61M 37/00 (2006.01); G05D 9/00 (2006.01); G01F 1/12 (2006.01) | ||
| U.S. Cl. 604—6.11 [604/4.01; 604/6.01; 700/281; 702/100] | 26 Claims |
| 1. An apparatus for processing blood comprising
a blood processing path for conducting blood through said apparatus;
a plurality of pumps for controlling the flow of blood through said path;
at least one control circuit electrically coupled to said pumps and controlling the operation of said pumps;
a reservoir in said path, said reservoir configured to contain a fluid, wherein a fluid level of said fluid in said reservoir
is variable;
vent means in fluid communication with said reservoir, said vent means allowing air to pass into and out of said reservoir;
a first sensor couple to said reservoir for detecting said fluid level within said reservoir and electrically connected to
said control;
a computer programmed with a control program for performing a test of pump ratios between at least two of said pumps by causing
a first pump to pump fluid in a first direction into said reservoir and a second pump to pump fluid in a second direction
out of said reservoir and finding a ratio of the action of said first pump to said second pump.
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