British Journal of Anaesthesia, 1985, Vol. 57, No. 12 1183-1187
© 1985 The Board of Management and Trustees of the British Journal of Anaesthesia
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CARDIOVASCULAR RESPONSES TO TRACHEAL INTUBATION IN SMALL CHILDREN
Effects of the Induction of Anaesthesia with Halothane
Otolaryngological Hospital Haartmaninkatu 4 E, 00290 Helsinki 29, Finland.
1Correspondence to L. L.
Cardiovascular changes in 27 children {mean age 1.5 yr) were studied during the induction of anaesthesia with 2.57% halothane and 70% nitrous oxide in oxygen. The eyelash reflex disappeared in a mean of 62±3.6 (SEM) s and tracheal intubation could be performed 4.9±p0.2 min after the start of halothane anaesthesia. Intubating conditions were satisfactory in 85% of the children. Systolic arterial pressure increased by 10.8±1.9 mm Hg and diastolic pressures by 6.0± 1.4 (SEM) mm Hg after intubation of the trachea. Heart rate decreased significantly after induction. No cardiac arrhythmias were noted. There were no significant changes in Q-T interval after induction, after intubation or during the later course of the anaesthetic.