US 11,717,603 B2
Thrombus aspiration system and methods for controlling blood loss
Ajit Nair, Pleasanton, CA (US); Christopher R. Kilgus, Felton, CA (US); and Ravish Sachar, Raleigh, NC (US)
Assigned to Contego Medical, Inc., Raleign, NC (US)
Filed by Contego Medical, Inc., Raleigh, NC (US)
Filed on Apr. 22, 2022, as Appl. No. 17/726,788.
Claims priority of provisional application 63/180,291, filed on Apr. 27, 2021.
Prior Publication US 2022/0339338 A1, Oct. 27, 2022
Int. Cl. A61M 1/00 (2006.01); A61B 17/221 (2006.01); A61F 2/01 (2006.01); A61B 17/22 (2006.01); A61M 25/00 (2006.01); A61B 17/00 (2006.01)
CPC A61M 1/74 (2021.05) [A61B 17/22 (2013.01); A61B 17/221 (2013.01); A61F 2/011 (2020.05); A61M 1/60 (2021.05); A61M 1/73 (2021.05); A61M 1/7415 (2021.05); A61M 1/76 (2021.05); A61M 25/0068 (2013.01); A61B 2017/00778 (2013.01); A61B 2017/22079 (2013.01); A61B 2217/005 (2013.01); A61M 2205/15 (2013.01); A61M 2205/3334 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An aspiration system for controlling blood loss during thrombus removal, the aspiration system comprising:
an aspiration catheter;
an aspiration tubing fluidically coupled to the aspiration catheter;
an aspiration lumen extending through the aspiration catheter and the aspiration tubing;
a flow sensor configured to measure a blood flow rate associated with blood within the aspiration lumen;
a receptacle fluidically coupled to the aspiration tubing and configured to collect blood aspirated by the aspiration catheter;
a vacuum line fluidically coupled to the receptacle and configured to transfer a vacuum pressure from a vacuum source to the receptacle;
a regulator configured to adjust the vacuum pressure within the vacuum line and within the receptacle; and
a vacuum controller operably coupled to the flow sensor and the regulator and configured to communicate with the regulator to adjust the vacuum pressure within the vacuum line and within the receptacle, the vacuum controller further configured to:
receive the blood flow rate from the flow sensor;
compare the blood flow rate to a target range for the blood flow rate; and
send an automatic control signal to the regulator based on a comparison of the blood flow rate to the target range;
wherein the automatic control signal causes the regulator to adjust the vacuum pressure within the vacuum line and within the receptacle;
wherein the automatic control signal causes the regulator to decrease the vacuum pressure within the vacuum line and within the receptacle upon a determination that the blood flow rate is above an upper limit of the target range, and wherein the automatic control signal causes the regulator to increase the vacuum pressure within the vacuum line and within the receptacle upon a determination that the blood flow rate is below a lower limit of the target range; and
wherein the upper limit is a blood flow rate from 70 mL per minute to 130 mL per minute.