Catheter systems for accessing the brain for treatment of ischemic stroke
AssigneeMG Stroke Analytics Inc.
InventorMayank Goyal
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Abstract
The invention describes catheter systems and methods for accessing the brain during endovascular/neurointervention procedures in the treatment of ischemic stroke. More specifically, a multi-axial catheter system and kit is described that improves the process of accessing a carotid artery particularly in patients having a tortuous aortic arch and thereafter improves the process of gaining access to the brain to enable the insertion of aspiration and/or the deployment clot retrieval devices. In addition, methods of utilizing these systems are described.
Claims20
An endovascular method for gaining access to cervical arteries and treating intracranial and cervical vascular conditions, the endovascular method for placement a catheter system within a human vasculature between a groin and cerebral arteries comprising the steps of:
- a. introducing a quadra-axial catheter system through a groin puncture, the quadra-axial catheter system comprising an outer guide catheter (GC) having a length sufficient to extend from the groin to an internal carotid artery, a groin to brain catheter (G2B) enabling aspiration through the G2B catheter and having a diameter to fit and slide within the outer GC, a luminal length longer than the outer GC and having a length sufficient to reach an intracranial clot, a soft distal tip region having a length sufficient to extend from the cervical internal carotid artery of a patient to cerebral arteries of a patient, and a proximal region having a length sufficient to extend from the carotid artery of a patient to outside the patient through the groin, a diagnostic catheter (DC) having a diameter to fit and slide within the G2B and having a pre-shaped tip for gaining access to varying anatomies of an aortic arch and having a length longer than the G2B, a guide wire (GW) having a diameter to fit and slide within the DC and having a length longer than the DC, where the soft distal tip region of the G2B has sufficient flexibility to ride over a DC without causing prolapse of the DC positioned beyond the aortic arch;
- and where the outer GC has a stiffness enabling the outer GC to ride over the G2B without causing prolapse of the G2B and DC when the G2B and DC are positioned beyond the aortic arch;
- b. advancing the catheter system to a descending aorta;
- c. advancing the GW and DC to a desired carotid artery and manipulating the GW into the desired carotid artery;
- d. advancing the GW to the cervical arteries;
- e. withdrawing the DC and introducing an alternate DC having a different tip region;
- f. advancing the G2B over the GW and DC to the cervical arteries;
- g. advancing the outer GC over the G2B to an internal carotid artery;
- and,
- h. withdrawing the alternate DC and GW.
Dependencies are inferred from the claim text.