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

A thrombectomy device comprising:

• a delivery catheter;
• and
• an expandable occlusion member configured to be movably disposed within the delivery catheter in a retracted position and at least partially outside the delivery catheter in an extended position, the occlusion member comprising a non-permeable covering, a diameter of a distal end of the occlusion member being greater in the extended position than in the retracted position, the occlusion member in its extended position being configured to adapt its shape and length to a surrounding blood vessel such that the occlusion member expands to a diameter of the blood vessel and occludes the blood vessel and such that the occlusion member lengthens as it narrows to retain a thrombus within the occlusion member during movement of the occlusion member through the blood vessel.