Auditory brainstem response during systemic hyperthermia.
The relationship between the brain temperature and the latency of ABR was evaluated in a dog model of systemic hyperthermia induced by heating of the blood during extracorporeal circulation. The latency of ABR was shortened and the amplitude was reduced with the elevation of brain temperature. The shortening of the latency was more notable in wave 4 than in wave 1, and this is considered to have been due to greater changes in the conduction velocity in the central nervous system than in peripheral nerves. The latency of ABR, from which the brain temperature can be estimated, is considered to be clinically useful as an index of brain temperature during systemic hyperthermia.
Department of Neurosurgery, Niigata University, Japan.
H
H
Takahashi
R
R
Tanaka
Y
Y
Sekihara
H
H
Hondo
D000818:Animals; D001831:Body Temperature; D001921:Brain / Q000502:physiology; D004285:Dogs; D016057:Evoked Potentials, Auditory, Brain Stem; D005112:Extracorporeal Circulation; D005260:Female; D006979:Hyperthermia, Induced; D008297:Male