Aneurysm occlusion device

A method of treating an aneurysm in a blood vessel in a patient, comprising:

• selecting an occlusion device including a substantially tubular structure having a proximal end region and a distal end region, having a first, expanded condition and a second, collapsed condition when drawn into a delivery microcatheter, at least a portion of the proximal end region defining a plurality of openings having a sufficiently small size to enhance occlusion of the aneurysm, and further including a control ring having a substantially annular body disposed on the proximal end region of the tubular structure and at least substantially circumscribing the proximal end region to prevent radial expansion of the proximal end region, the tubular structure being a braided mesh tube, the tubular structure having a substantially hemispherical shape in the expanded condition;
• mechanically engaging the control ring with a notch on a finger element of a grabber on a pusher member to enable manipulation of the occlusion device, the notch having an inner top surface and an inner bottom surface defining an inner cavity having a height approximately equal to a thickness of the control ring;
• drawing the occlusion device into the delivery microcatheter carrying the pusher member to force the occlusion device into the collapsed condition;
• inserting the delivery microcatheter with the occlusion device into the vasculature of the patient to reach a region of the aneurysm in the blood vessel;
• inserting a distal end of an embolic implant catheter into the aneurysm;
• positioning the occlusion device within the aneurysm;
• expanding the occlusion device to capture the embolic implant catheter against a wall of the aneurysm;
• delivering at least one embolic coil through the embolic implant catheter to occlude flow into the aneurysm;
• and
• mechanically releasing the control ring and withdrawing the delivery microcatheter and the embolic implant catheter from the patient.