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Age and the onset of desaturation in apnoeic children

R Patel1, M Lenczyk, R S Hannallah

  • 1Department of Anesthesiology, Children's National Medical Center, Washington, D.C. 20010.

Canadian Journal of Anaesthesia = Journal Canadien D'Anesthesie
|September 1, 1994
PubMed

Insights

Apnoeic infants desaturate faster than older children and adolescents during anesthesia. This study shows oxygen saturation decline time increases with age in healthy pediatric patients.

Area of Science:

  • Anesthesiology
  • Pediatric Critical Care

Background:

  • Patients undergoing general anesthesia are typically apneic during airway manipulation.
  • Understanding desaturation times is crucial for safe pediatric anesthesia.

Purpose of the Study:

  • To determine the onset of desaturation after pre-oxygenation in apneic infants, children, and adolescents.
  • To correlate desaturation time with patient age.

Main Methods:

  • Fifty healthy pediatric patients (2 days to 18 years) were stratified into five age groups.
  • Following anesthesia induction and paralysis, mask ventilation with oxygen was maintained.
  • The time from mask removal to a decrease in oxygen saturation (SpO2) to 90% was measured.

Main Results:

  • Desaturation occurred significantly earlier in infants (0-6 months) compared to 2-5 year olds (96.5s vs 160.4s).
  • Children (2-5 years) desaturated faster than adolescents (11-18 years) (160.4s vs 382.4s).
  • A strong positive correlation was found between age and the time to reach 90% SpO2 (r² = 0.88).

Conclusions:

  • The time to desaturation following pre-oxygenation increases with age in healthy pediatric patients.
  • Age is a significant factor influencing the duration of safe apnea after pre-oxygenation in children.

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