Patent ID: 11944327
Assignee: NEURAVI LIMITED
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 15:
16. A method of retrieving an occlusive thrombus from a blood vessel of a patient comprising the steps of:
providing an outer catheter and an inner clot retrieval catheter, the inner clot retrieval catheter comprising:
a self-expandable tip,
a support tube comprising:
a hollow structure disposed around a longitudinal axis of the inner clot retrieval catheter;
two longitudinally extending spines located on opposing sides of the support tube;
a plurality of loop ribs connected along the length of each of the two spines and external to each of the two spines, the loop ribs being axisymmetric with the longitudinal axis;

a cover disposed around the self-expandable tip and the support tube, and
a distal mouth;
restricting flow in a lumen between at least a portion of an inner wall of the outer catheter and at least a portion of an outer wall of the inner clot retrieval catheter;
accessing an arterial blood vessel of a patient using conventional means;
advancing the outer catheter and inner clot retrieval catheter to a target site;
deploying the inner clot retrieval catheter adjacent to the occlusive thrombus to radially expand the self-expandable tip;
aspirating through one or both of the outer catheter and inner clot retrieval catheter to stimulate the occlusive thrombus into the distal mouth of the inner clot retrieval catheter and capture the occlusive thrombus; and
withdrawing the inner clot retrieval catheter with the captured occlusive thrombus from the patient.