 moder hypothermia man haemodynam metabol effect studi perform patient undergo intracrani opera- tion induct revers surfac hypothermia 30 oxygen uptak decreas averag 26 cent 34 30 48 cent predict basal uptak time cardiac output decreas 11 5 cent consist rise calcul mix venou oxygen satur 76 81 cent 30 result cool oxygen dissoci estim tension oxygen mix venou blood remain virtual unchang shiver allow occur patient oxygen uptak increas 50 cent concomit increas cardiac output observ atrial svc oxygen satur correl well calcul mix venou oxygen satur regard direct magnitud chang chang temperatur 