Ket·y-Schmidt meth·od(kē'tē shmit),
a method for measuring organ blood flow first applied to the brain in 1944 by CF Schmidt and SS Kety. A chemically inert indicator gas is equilibrated with the tissue of the organ of interest, and the rate of disappearance from the organ is measured. Blood flow is calculated on the assumption that the tissue and venous blood concentrations of the indicator gas are in diffusion equilibrium at all blood flow rates and that the rate of disappearance of the indicator from the tissue is a function of how much of the indicator is in the tissue at any time, that is, the rate of disappearance is assumed to be exponential.
Farlex Partner Medical Dictionary © Farlex 2012
Kety-Schmidt methodAn obsolete term for the measurement of the cerebral blood flow following inhalation of nitrous oxide, a rarely indicated technique that is no longer eponymously dignified.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.