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An Index of Tolerance to Temporary Carotid Occlusion

Wesley S. Moore, MD; James M. Yee, MD; Albert D. Hall, MD

AMA Arch Surg. 1973;106(4):520-523.

Abstract
Seventy-eight patients underwent 107 carotid artery operations in which a decision to use an internal shunt was based solely upon the back pressure value distal to the proximally clamped internal carotid artery. The technique of back pressure measurement and angiographic correlation with back pressure values are described. Of the patients operated on, 89.7% had back pressures above 25 mm Hg and did not require a shunt. The validity of the test is confirmed as there were no deaths or strokes among the unshunted, neurologically intact, patients.

Patients with a neurologic deficit prior to operation have been identified as exceptions to the back pressure method. Four of 24 patients in this group experienced exacerbation of existing neurologic deficits following operation. We now recommend that an intraluminal shunt be used routinely for this special category.

Author Affiliations
San Francisco

From the Surgical Service, Veterans Administration Hospital and University of California, San Francisco.

Footnotes
Received for publication Nov 21, 1972; accepted Dec 15.

Read before the 80th annual meeting of the Western Surgical Association, Rochester, Minn, Nov 17, 1972.

Reprint requests to Veterans Administration Hospital, 4150 Clement St, San Francisco, Calif 94121 (Dr. Moore).

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