Thermal Clearance Method for Estimation of Blood Flow under Local Hyperthermia
نویسندگان
چکیده
منابع مشابه
Continuous quantitative local cerebral blood flow measurement. Calibration of thermal conductivity measurements by the hydrogen clearance method.
The capability of a miniaturized probe to measure local cerebral blood flow in a continuous and quantitative manner is described. The incorporation of thermal conductivity measurements using the isothermal principle with the hydrogen clearance method allows calibration of the thermal conductivity component in absolute terms. Evaluation of this system in 14 cats showed a linear relationship betw...
متن کاملComparison of local cerebral blood flow determined by thermal and hydrogen clearance.
Local cerebral blood flow (1CBF) was measured simultaneously in ten cats with (1) a large surface thermal diffusion probe resting on the cortex and (2) hydrogen clearance curves from implanted electrodes surrounding the thermal probe. A close correlation was found between 1CBF values obtained by the two methods. Since hydrogen clearance is accepted as quantitative, the data suggest that the the...
متن کاملCortical blood flow: thermal diffusion vs isotope clearance.
A thermal diffusion flow probe incorporating a Peltier stack has been found to give a quantitative dynamic assessment of cortical blood flow in both the laboratory and clinical settings. Further calibration characteristics of the probe were evaluated by correlation with the fast component of Xe133 clearance in cats. The correlation has some linear characteristics but is better defined by the eq...
متن کاملMeasurement of local cerebral blood flow in the unanesthetized rat using a hydrogen clearance method.
The hydrogen clearance method for measuring local tissue blood flow was adapted for use in the brain of the unanesthetized rat by means of a stainless steel plate screw mounted in the skull as the reference electrode instead of a calomel electrode. Blood flow was measured at 3 sites in the brains of 5 threemonth-old rats over a 6-week period. Blood flow in the frontal cortex and the cerebellum ...
متن کاملA Method for the Estimation of Regional Cerebral Blood Flow §
Over the past years the nitrous oxide absorption method proposed by Kety and Schmidt12 has achieved wide application for the estimation of the blood flow through the cerebral tissue as a whole. However, histological evidence indicates a great variability in the relative vascularity of the several portions of the brain. Thus, for the most part, the white matter is relatively poorly supplied with...
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ژورنال
عنوان ژورنال: Thermal Medicine(Japanese Journal of Hyperthermic Oncology)
سال: 1987
ISSN: 0911-2529,1881-9516
DOI: 10.3191/thermalmedicine.3.193