US 12,408,933 B2
Apparatus and methods for controlled clot aspiration
Scott Teigen, West Fargo, ND (US); Steven Loisel, Castro Valley, CA (US); Stephen Pons, Alameda, CA (US); and Ben Tompkins, Danville, CA (US)
Assigned to Penumbra, Inc., Alameda, CA (US)
Filed by Penumbra, Inc., Alameda, CA (US)
Filed on Sep. 18, 2023, as Appl. No. 18/469,445.
Application 18/469,445 is a continuation of application No. 16/977,431, granted, now 11,759,219, previously published as PCT/US2019/043095, filed on Jul. 23, 2019.
Claims priority of provisional application 62/778,708, filed on Dec. 12, 2018.
Claims priority of provisional application 62/702,804, filed on Jul. 24, 2018.
Prior Publication US 2024/0000469 A1, Jan. 4, 2024
Int. Cl. A61B 17/22 (2006.01); A61B 17/00 (2006.01); A61B 90/00 (2016.01); A61M 1/00 (2006.01); A61B 17/3203 (2006.01); A61B 17/34 (2006.01); A61M 39/10 (2006.01)
CPC A61B 17/22 (2013.01) [A61M 1/75 (2021.05); A61M 1/76 (2021.05); A61M 1/77 (2021.05); A61M 1/774 (2021.05); A61B 17/00 (2013.01); A61B 2017/00022 (2013.01); A61B 2017/00561 (2013.01); A61B 17/32037 (2013.01); A61B 17/3498 (2013.01); A61B 90/06 (2016.02); A61B 2090/064 (2016.02); A61B 2217/005 (2013.01); A61M 39/105 (2013.01); A61M 2205/3334 (2013.01); A61M 2205/3344 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A vacuum aspiration control system for use with a vacuum source and an aspiration catheter, wherein the vacuum aspiration control system comprises:
connection tubing configured to act as a fluid conduit between the vacuum source and the aspiration catheter;
a controllable valve configured to control a level of vacuum in the connection tubing provided by the vacuum source;
one or more pressure sensors associated with the connection tubing; and
a controller configured to utilize an artificial neural network to classify a flow state in the connection tubing based on one or more pressure readings received from the one or more pressure sensors, wherein the controller is further configured to:
responsive to a current flow state being classified as unrestricted, periodically open the controllable valve for a time interval to sample flow;
utilize the artificial neural network to classify the flow state for the sampled flow;
close the controllable valve if the flow state for the sampled flow is classified as unrestricted; and
hold the controllable valve open if the flow state for the sampled flow is classified as restricted or obstructed, wherein the controller is configured to hold the controllable valve open until a subsequent flow state is classified as unrestricted.