Modeling cerebral arteriovenous lactate kinetics after intravenous lactate infusion in the rat.
Venous-arterial lactate differences across the brain during lactate infusion in rats were studied, and the fate of lactate was described with a mathematical model that includes both cerebral and extracerebral kinetics. Ultrafiltration was used to sample continuously and simultaneously arterial and venous blood. Subsequent application of flow injection analysis and biosensors allowed the measurement of glucose and lactate concentrations every minute. Because of the high temporal resolution, arteriovenous lactate kinetics could be modeled in individual experiments. The existence of both a cerebral lactate sink and a lactate exchangeable compartment, representing approximately 24% of brain volume, was thus modeled.
Leegsma-Vogt
Gea
G
Department of Psychiatry, Section Biological Psychiatry, University of Groningen, The Netherlands.
van der Werf
Siebren
S
Venema
Kor
K
Korf
Jakob
J
D000818:Animals; D002536:Cerebral Arteries / Q000502:physiology; D002550:Cerebral Veins / Q000502:physiology; D002560:Cerebrovascular Circulation / Q000502:physiology*; D007275:Injections, Intravenous; D019344:Lactic Acid / Q000493:pharmacokinetics*; D008955:Models, Cardiovascular; D051381:Rats
D019344:Lactic Acid