Related Experiment Videos
Comparison of inhalation induction with isoflurane or halothane in children
L Lindgren1, T Randell, L Saarnivaara
1Department of Anaesthesia, Surgical Hospital, Helsinki University Central Hospital, Finland.
Insights
Isoflurane anesthesia induction in children showed faster reflex loss but more respiratory issues than halothane. Both agents provided satisfactory intubating conditions with minimal cardiovascular effects.
Area of Science:
- Pediatric Anesthesiology
- Respiratory Physiology
Background:
- Pediatric anesthesia requires careful agent selection for optimal outcomes.
- Isoflurane and halothane are common volatile anesthetics used in children.
Purpose of the Study:
- To compare the induction characteristics and intubating conditions of isoflurane versus halothane in pediatric patients.
- To evaluate cardiovascular and respiratory responses during induction and intubation.
Main Methods:
- Thirty-six children received premedication with chloral hydrate and atropine.
- Anesthesia was induced with either isoflurane or halothane in nitrous oxide and oxygen.
- Respiratory and cardiovascular parameters were monitored throughout induction and intubation.
Main Results:
- Isoflurane induction led to faster eyelash reflex loss (P < 0.001) and quicker intubation (P < 0.01) compared to halothane.
- More respiratory adverse events, including tachypnoea and need for assisted ventilation, occurred with isoflurane.
- Both agents provided satisfactory intubating conditions in 80% of cases with minimal cardiovascular responses.
Conclusions:
- Isoflurane offers faster induction but is associated with a higher incidence of respiratory complications in pediatric anesthesia.
- Halothane provides a slower but potentially safer respiratory profile during induction.
- Both agents are suitable for intubation, but careful monitoring for respiratory depression is crucial with isoflurane.
Abstract:
Thirty-six children (mean age 2.4 years) premedicated with oral chloral hydrate 70 mg kg-1 and atropine 0.03 mg kg-1 were anaesthetized with either 3.75% isoflurane or 2.5% halothane in 70% nitrous oxide in oxygen. The eyelash reflex disappeared in 39 +/- 7 s (mean +/- SD) with isoflurane and in 56 +/- 16 s with halothane (P less than 0.001). Tachypnoea was seen with both anaesthetics. Coughing, breath holding, stridorous breathing and respiratory depression were seen during isoflurane but not during halothane induction (P less than 0.01). In nine of 20 children anaesthetized with isoflurane, the ventilation had to be assisted before intubation. Endotracheal intubation was possible in 224 +/- 35 s with isoflurane and in 281 +/- 64 s with halothane (P less than 0.01). Intubating conditions were satisfactory in 80% of the children anaesthetized with either volatile agent. Cardiovascular responses to endotracheal intubation were minimal with both anaesthetics. No cardiac dysrhythmias were noted. Heart rate was higher during isoflurane than during halothane induction. Diastolic arterial pressure was lower during isoflurane than during halothane induction immediately and 5 min after intubation.