Thrombectomy system and methods of extracting a thrombus from a thrombus site in a blood vessel of a patient

A thrombectomy system, comprising:

• a delivery catheter configured to be advanced through vasculature of a patient to a thrombus site within a blood vessel;
• an aspiration catheter adapted to apply suction to an expandable aspiration funnel extending from a distal end of the aspiration catheter, the aspiration funnel being configured to be movably disposed within the delivery catheter in a retracted position in a compressed state and at least partially outside the delivery catheter in an expanded position,
• the aspiration funnel having a first tubular section and a second tubular section, the second tubular section proximal to the first tubular section, the second tubular section comprising a first sub-section having a shape with a progressive reduction of diameter configured to open and create a space for the thrombus, and a second sub-section of a tubular uniform diameter extending between aspiration catheter and the first sub-section, wherein each of the first tubular section and the second tubular section is formed by a mesh of at least two helicoidal filaments turning respectively in opposite directions and being intertwined, and extending continuously through the first tubular section and the second tubular section, wherein a braiding angle of the at least two sets of helicoidal filaments within the first tubular section is configured to provide outward radial forces higher than in the second tubular section, wherein the at least two sets of helicoidal filaments form closed loops at a distal end of the first tubular section to act as a spring to further provide the outward radial forces, the aspiration funnel comprising a non-permeable covering, wherein in the expanded position the second tubular section has a diameter smaller than a diameter of the first tubular section, and a diameter of a distal end of the aspiration funnel being greater in the expanded position than in the retracted position, the aspiration funnel being configured to adapt its shape and length to an inner wall of the blood vessel such that in the expanded position a length of the first tubular section from the closed loops to the first sub-section becomes appositioned against the inner wall of the blood vessel to occlude blood flow through the blood vessel, and further wherein the aspiration funnel length increases when it narrows to retain a thrombus within the aspiration funnel;
• a clot-capture element comprising closed cells configured to capture the thrombus and to be at least partially withdrawn with the captured thrombus into the aspiration funnel;
• and
• a microcatheter adapted to carry the clot-capture element to the thrombus site,
• wherein the clot-capture element is configured to be movably disposed within the microcatheter in a retracted position, and
• wherein the microcatheter is configured to be movably disposed within the aspiration catheter.