Patent ID: 11944328
Assignee: PENUMBRA, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 28:
29. A dynamic aspiration system for use with a vacuum source, a pressure source, a pressure chamber, and an aspiration catheter, the system comprising:
a connecting tube configured to place the vacuum source, the pressure source, the pressure chamber, and the aspiration catheter in fluid communication;
a first controllable valve configured to control a level of negative pressure in the connecting tube provided by the vacuum source;
a second controllable valve configured to control a level of positive pressure in the connecting tube provided by the pressure source;
one or more pressure sensors configured to detect one or more pressure sensor readings associated with a flow state within the aspiration catheter or the connecting tube; and
a controller configured to:
operate the dynamic aspiration system in a first pressure pulse protocol of a plurality of pressure pulse protocols each comprising one or more pressure pulses, wherein operating the dynamic aspiration system in a pressure pulse protocol comprises one or more of modulating one or more of the controllable valves and actuating a piston in the pressure chamber, and wherein one or more pressure pulses of the first pressure pulse protocol generate one or more pressure differentials in the aspiration catheter or the connecting tube;
determine, for each pressure pulse of the first pressure pulse protocol, a degree of success corresponding to a change in a flow rate in the aspiration catheter or the connecting tube responsive to the pressure pulse; and
modulate one or more of the controllable valves in a second pressure pulse protocol of the plurality of pressure pulse protocols, wherein the second pressure pulse protocol is determined based at least in part on the degrees of success determined for the one or more pressure pulses of the first pressure pulse protocol.