US 12,433,989 B2
Fluid control and bypass features for an apheresis system
Brian M. Holmes, Evergreen, CO (US); Thomas J. Felt, Boulder, CO (US); and Taylor Polodna, Golden, CO (US)
Assigned to Terumo BCT, Inc., Lakewood, CO (US)
Filed by Terumo BCT, Inc., Lakewood, CO (US)
Filed on Aug. 4, 2021, as Appl. No. 17/394,182.
Application 17/394,182 is a division of application No. 15/959,025, filed on Apr. 20, 2018, granted, now 11,103,630.
Claims priority of provisional application 62/539,053, filed on Jul. 31, 2017.
Claims priority of provisional application 62/488,404, filed on Apr. 21, 2017.
Prior Publication US 2021/0361850 A1, Nov. 25, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 1/36 (2006.01); A61M 1/02 (2006.01); A61M 1/30 (2006.01); A61M 1/34 (2006.01); A61M 1/38 (2006.01)
CPC A61M 1/3696 (2014.02) [A61M 1/024 (2013.01); A61M 1/0272 (2013.01); A61M 1/304 (2014.02); A61M 1/3496 (2013.01); A61M 1/3601 (2014.02); A61M 1/36224 (2022.05); A61M 1/362261 (2022.05); A61M 1/362262 (2022.05); A61M 1/362265 (2022.05); A61M 1/3627 (2013.01); A61M 1/3646 (2014.02); A61M 1/3693 (2013.01); A61M 1/382 (2013.01); A61M 1/30 (2013.01); A61M 1/3403 (2014.02); A61M 1/36222 (2022.05); A61M 1/3639 (2013.01); A61M 2202/0415 (2013.01); A61M 2205/12 (2013.01); A61M 2205/123 (2013.01); A61M 2205/331 (2013.01); A61M 2205/3334 (2013.01); A61M 2205/3379 (2013.01); A61M 2205/50 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A soft cassette comprising:
a first port;
a second port;
a direct flow lumen fluidly connected to the first port and the second port, the direct flow lumen including a first compliant region, a first valve configured to pinch the direct flow lumen closed at the first compliant region, a second compliant region, and a second valve configured to pinch the direct flow lumen closed at the second compliant region;
a drip chamber inter-disposed in the direct flow lumen such that fluid passing through the direct flow lumen passes through the drip chamber; and
a fluid flow bypass path both fluidly connected to the direct flow lumen adjacent the first port and between the first port and the drip chamber and fluidly connected to the direct flow lumen adjacent the second port and between the second port and the drip chamber, such that fluid flowing through the fluid flow bypass path bypasses the drip chamber.