This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Request Permissions Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Nakai, H. Articles by Yamamoto, Y. L. Search for Related Content PubMed PubMed Citation Articles by Nakai, H. Articles by Yamamoto, Y. L.

Stroke, Vol 18, 158-167, Copyright © 1987 by American Heart Association

ARTICLES

Simultaneous in vivo measurement of lumped constant and rate constants in experimental cerebral ischemia using F-18 FDG

H Nakai, H Matsuda, E Takara, M Diksic, E Meyer and YL Yamamoto

Lumped and transfer rate constants in ischemic brain tissue must be measured to estimate accurately cerebral glucose utilization by the deoxyglucose method. We studied the bilateral middle cerebral artery occlusion model in 17 cats, 5 with a 1-hour occlusion, 5 with a 4-hour occlusion, and 7 with a sham operation. The time course of cerebral tissue radioactivity (Ci*(t)) was monitored by external coincidence counting during a programmed infusion of [18F]-2-deoxy-2-fluoro-d- glucose (18F-2-FDG). Arterial plasma concentration (Cp*(t)) of the tracer was kept constant during the first 45 minutes. Rate constants were estimated from Ci*(t) and Cp*(t) by a nonlinear least-squares fitting routine. The lumped constant was estimated from the fit of the ratio of extraction fractions of glucose and 18F-2-FDG by nonweighted, nonlinear least-squares fitting. In the 4-hour-occlusion model, the transfer constant k1* was 23% lower, k3* 39% lower, and the lumped constant 78% higher than in the sham-operated animals. In the 1-hour- occlusion model, k3* was 26% lower than in the sham-operated animals but the lumped constant was not significantly different. The rate of glucose utilization was significantly different in the 4-hour-occlusion model compared to the sham-operated animals (48% decrease, p less than 0.05) but was not significantly different in the 1-hour-occlusion model.

This article has been cited by other articles:

				T. Doenst and H. Taegtmeyer Profound Underestimation of Glucose Uptake by [18F]2-Deoxy-2-fluoroglucose in Reperfused Rat Heart Muscle Circulation, June 23, 1998; 97(24): 2454 - 2462. [Abstract] [Full Text] [PDF]

				T. Beck, H.-J. Goller, and A. Wree Chronic Depression of Glucose Metabolism in Postischemic Rat Brains Stroke, June 1, 1995; 26(6): 1107 - 1113. [Abstract] [Full Text]