Prevention of intraoperative hypothermia by preoperative skin-surface warming.
BACKGROUND
Intraoperative hypothermia initially results from internal redistribution of heat facilitated by anesthesia-induced vasodilation. Preinduction skin-surface warming minimizes postinduction hypothermia in anesthetized volunteers. However, its efficacy might be reduced in surgical situations, because of multiple sources of heat loss.


METHODS
Intraoperative core and mean skin temperatures were measured during total hip arthroplasty in 16 patients, randomly assigned to be covered preoperatively with a warming blanket for > or = 90 min (prewarmed group) or not covered (unwarmed group).


RESULTS
During the first hour of anesthesia, core temperature decreased more than twice as much in the unwarmed group (-0.7 +/- 0.1 degree C; mean +/- SE) than in the prewarmed patients (-0.3 +/- 0.1 degree C). At the end of surgery, core temperature was 36.3 +/- 0.1 degree C in the prewarmed group and 35.2 +/- 0.2 degree C in the unwarmed group. During recovery, seven patients obviously shivered in the unwarmed group and none in the prewarmed group.


CONCLUSIONS
Preanesthetic skin-surface warming reduces the initial postinduction hypothermia in surgical patients, preventing intraoperative hypothermia and postoperative shivering even for procedures lasting 3 h or longer.
Just
B
B
Department of Anesthesiology and Intensive Care, Saint-Antoine University Hospital, Paris, France.
Trévien
V
V
Delva
E
E
Lienhart
A
A
D000368:Aged; D001831:Body Temperature; D005260:Female; D006361:Heating; D006622:Hip Prosthesis; D006801:Humans; D007035:Hypothermia / Q000517:prevention & control*; D007431:Intraoperative Complications / Q000517:prevention & control*; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000517:prevention & control; D011300:Preoperative Care; D012768:Shivering; D012881:Skin Temperature