US 11,786,140 B2
Controlled-flow infusion catheter and method
Robert S. Schwartz, Inver Grove Heights, MN (US)
Assigned to CorFlow Therapeutics AG, Baar (CH)
Filed by CorFlow Therapeutics AG, Baar (CH)
Filed on Aug. 21, 2020, as Appl. No. 17/240.
Claims priority of provisional application 62/889,984, filed on Aug. 21, 2019.
Prior Publication US 2021/0052168 A1, Feb. 25, 2021
Int. Cl. A61B 5/026 (2006.01); A61B 5/00 (2006.01); A61M 5/142 (2006.01)
CPC A61B 5/026 (2013.01) [A61B 5/6851 (2013.01); A61B 5/6853 (2013.01); A61B 2562/0247 (2013.01); A61M 5/142 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of making real-time determinations of flow resistance through a targeted location in a blood vessel comprising:
placing a distal pressure sensor distal of a targeted location in the blood vessel;
placing a proximal pressure sensor proximal of the targeted location in the blood vessel;
introducing infusate at an infusate flow rate into the blood vessel proximal of the distal sensor;
changing the infusate flow rate while monitoring pressure differences between the proximal and distal sensors;
calculating flow resistance through the targeted location by dividing the change in pressure drop between the proximal and distal sensors by a corresponding change in the infusate flow rate.