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Related Experiment Videos

Extracranial surgery for the low-flow-endangered brain

R H Whitten, W Gee, H A Kaupp

    Archives of Surgery (Chicago, Ill. : 1960)
    |September 1, 1981
    PubMed
    Summary

    Restoring carotid artery blood flow is key for patients with severe bilateral carotid disease. Extracranial-intracranial bypass surgery is a secondary option for those unresponsive to improved inflow due to poor collateral circulation.

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    Scotoma as a complication of decompression sickness.

    Archives of ophthalmology (Chicago, Ill. : 1929)·2010

    Area of Science:

    • Vascular Surgery
    • Neurology
    • Cerebrovascular Disease

    Background:

    • Severe carotid stenosis or occlusion affects cerebrovascular supply.
    • Bilateral carotid disease presents unique management challenges.
    • Distinguishing low-flow from embolic transient ischemic attacks (TIAs) is crucial.

    Purpose of the Study:

    • To evaluate the effectiveness of improving carotid inflow in patients with severe bilateral carotid disease.
    • To determine the optimal surgical strategy for managing severe bilateral carotid stenosis/occlusion.
    • To assess the role of ocular pneumoplethysmography (OPG) in managing these patients.

    Main Methods:

    • Angiography to diagnose severe bilateral carotid stenosis (>75% area reduction).
    • Ocular pneumoplethysmography (OPG) performed preoperatively and postoperatively.

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  • Analysis of OPG changes following unilateral carotid surgery in 39 patients.
  • Evaluation of patients undergoing bilateral procedures.

    • Main Results:

    • Improved carotid inflow was associated with positive OPG changes post-surgery.
    • OPG studies provided evidence supporting inflow restoration as the primary goal.
    • Extracranial-intracranial bypass was effective in a subset of patients with poor collateral flow.

    Conclusions:

    • Prioritizing major carotid inflow augmentation is essential for patients with severe bilateral carotid disease.
    • Distal extracranial-intracranial reconstruction should be reserved for select cases unresponsive to improved inflow.
    • OPG is a valuable tool for assessing the hemodynamic significance of carotid stenosis and surgical outcomes.