Thrombectomy device, system and method for extraction of vascular thrombi from a blood vessel

A method of extracting a thrombus from a thrombus site in a blood vessel of a patient, the method comprising:

• advancing a delivery catheter, a tapered dilator catheter and an aspiration funnel through vasculature of the patient toward the thrombus site with a distal end of the tapered dilator catheter disposed distal to a distal end of the delivery catheter and the aspiration funnel disposed in a retracted position proximal to the distal end of the delivery catheter;
• retracting the dilator catheter into the delivery catheter;
• moving the aspiration funnel and delivery catheter with respect to each other to place the aspiration funnel in an extended position at least partially outside of the delivery catheter;
• occluding the blood vessel with the funnel to stop flow of blood in the blood vessel;
• aspirating the thrombus into the funnel;
• moving the funnel and the thrombus proximally within the vasculature;
• and
• adapting a shape and length of the funnel to a surrounding blood vessel of the vasculature such that the funnel lengthens as it narrows to retain the thrombus within the funnel.