Acta anaesthesiologica Scandinavica
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Acta Anaesthesiol Scand · Jan 1975
Electroencephalographic activity in children under enflurane anesthesia.
EEG, end-tidal CO2, neck muscle EMG, eye movements, and ECG were recorded in 17 children undergoing enflurane anesthesia combined with N2O and O2. All subjects were classified in the lowest risk group and had normal pre-anesthetic EEG recordings. Eleven subjects were breathing spontaneously and six were under controlled ventilation. ⋯ At 3% enflurane, three out of eight subjects showed electrographic seizure activity of poly-spike-suppression type. One of these children also had motor manifestations during this type of seizure activity at a PaCO2 of 31 mmHg. The results indicate that electrographic seizure activity is common among children with moderate hypocapnia at enflurane concentrations of 3% or more.
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Acta Anaesthesiol Scand · Jan 1975
Effect of dihydroergotamine on perpheral circulation during epidural anaesthesia in man.
The effect of intravenous administration of dihydroergotamine (DHE) on regional blood flow in the forearm and calf after pharmacological nerve blockade of the lower body induced by epidural anaesthesia has been studied in 13 subjects. After anaesthesia, DHE induced a significant increase in blood flow in the forearm with intact innervation and a significant decrease in blood flow in the nerve-blocked calf. ⋯ In the intact forearm, local vascular resistance decreased. The results indicate that DHE exerts a complex effect on resistance vessels in addition to its well-known effect on the capacitance vessels.