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Flow-Assisted Neurosurgery

A Flow Handbook for the novice on Intraoperative Cerebrovascular Blood Flow Measurements.

A brief review of the modalities which allows the neurosurgeon to assess, intraoperatively, blood flow and vascular stenosis.

Recommendation for Probe Placements
Tips for various aneurysm clipping surgeries.

Expected Flow Rates
Cerebral vessels during aneurysm surgery and their probe size recommendations

Aneurysm clipping case examples

Flow assisted aneurysm surgery with the Charbel Micro-flowprobe^TMprovides the surgeon with immediate, quantitative information on blood flow in the parent vessel and distal branches. These measurements take minimal surgical time and help guide the safe progress of the operation. Expected Flows, Technical Tips

EC-IC Bypass case examples

Flow-assisted neurosurgery with the Charbel Micro-flowprobe^TMis used to assess the patency and adequacy of flow after EC-IC arterial bypass. Key measurements are the free flow in the artery and the post-anastomotic flow in the bypass. The free flow measurements represent the maximum capacity of the bypass, since resistance to flow is zero. These measurements become the surgeon's benchmark for an optimally functioning bypass. After constructing the bypass, flow is measured again in the donor artery. When bypass flow equals free flow, the bypass is technically flawless.

Mad Cow Disease

An review of Creutzfeldt-Jakob Disease

Transit-Time Ultrasound Theory, TN30

Description of the theory behind transit time ultrasound flow measurements.