Methods for clot removal
AssigneeInquis Medical, Inc.
InventorsRichard Childs, Richard Christian Ewers, William Jason Fox, Vahid Saadat
Life of this patent
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Abstract
Aspiration catheters for removing clot material from a patient, systems including these catheter as well as methods of making and using these aspiration catheters may be configured to remove clot material in long, continuous strips that prevent release of smaller clot fragments back into the vessel. Also described herein are blood collection apparatuses that may allow safe and easy reperfusion of collected blood.
Claims22
A method for removing, filtering, and reperfusing a patient's blood, said method comprising:
- applying negative pressure to a first chamber and a second chamber connected in-line with an aspiration catheter having a distal end in a patient blood vessel and with a negative pressure source;
- opening an aspiration valve connected between the aspiration catheter and the first chamber to allow the negative pressure to draw blood and clot into the first chamber and the second chamber so that blood flows from the first chamber to the second chamber, wherein filtered blood collects in the second chamber;
- closing the aspiration valve;
- venting the first chamber and the second chamber to return the pressure to atmospheric;
- and
- opening a reperfusion valve to allow the filtered blood in the second chamber to return to the patient only after the aspiration valve has been closed and the first chamber and the second chamber have been vented.
A method for removing, filtering, and reperfusing a patient's blood, said method comprising:
- positioning a distal end of an aspiration catheter at a clot target site in the patient's vasculature;
- turning on a pump to charge a chamber assembly to a desired vacuum level;
- turning off the pump to hold the charged vacuum in the chamber assembly;
- opening an aspiration valve connected between the aspiration catheter and the chamber assembly to allow the vacuum to draw blood and clot into the chamber assembly, wherein filtered blood collects in a lower portion of the chamber assembly;
- closing the aspiration valve;
- venting the chamber assembly to return the pressure to atmospheric;
- and
- opening a reperfusion valve to allow the filtered blood in the chamber assembly to return to the patient only after the aspiration valve has been closed and the chamber assembly has been vented.
Dependencies are inferred from the claim text.