We aim that uncovering patients during induction of general anesthesia does not decrease
core body temperature in pediatric patients.
Some anesthesiologists cover the pediatric patient with a blanket during the induction of
general anesthesia, while others do not. Complaints have been raised by pediatric surgeons
that if a pediatric patient is not covered during induction of general anesthesia, the
child's core body temperature will be lower than normal following surgery and in the
Children are at risk of significant heat loss in the operating room due to multiple factors,
such as, exposure to cold temperatures, decrease in metabolism following induction of
general anesthesia, increased surface-area-to-volume ratio, and through considerable
respiratory heat loss.1
A decrease in temperature of 0.5ºC to 1.5ºC can occur during induction of general anesthesia
in pediatric patients2. The use of heating blankets and warmers may increase temperature or
result in a constant temperature on pediatric patients intra-operatively3. We want to
investigate the differences in temperature between the two approaches, covering and not
covering pediatric patients, during induction of general anesthesia of a urologic procedure
with a caudal block and the difference in temperature post-operatively. We hypothesize that
the core temperatures of:
1. the covered and warmed group during induction of general anesthesia will be greater by
0.5ºC than the uncovered group during induction of general anesthesia.
2. both groups, covered and uncovered, will be equal during surgery and post-operatively.
In other words, due to the active warming procedures during surgery and
post-operatively in the PICU, core temperatures of the uncovered group will catch up to
the covered group.
- The ages of the subjects ranging from 6 months to 3 years undergoing surgery for
circumcision or hernia repair with caudal block.
- ASA physical status classification greater than 2, unsigned or unattainable written
informed consent form, induction of general anesthesia time of greater than 45
minutes, fever, or temperature regulation inability.