Intrathecal Opioid-Induced Hypothermia Following Subarachnoid Block With Morphine Injection for Elective Cesarean Delivery: A Case Report.

Opioids have been administered intrathecally with subarachnoid block for postoperative pain relief in parturients undergoing elective cesarean deliveries. This case report presents the uncommon occurrence of intrathecal opioid-induced hypothermia in the latent phase of recovery following elective cesarean delivery. There are few case reports on the occurrence of latent-phase postanesthesia care hypothermia in patients receiving subarachnoid block with morphine sulfate injection (Duramorph). Hypothermia can occur postoperatively for many reasons and can be life-threatening. In this case, hypothermia developed and progressed throughout the postoperative period. The causes of hypothermia were evaluated and treated without success initially. Thyroid dysfunction and alternative differential diagnoses were ruled out. Further assessment determined that the morphine injection might have been a contributing factor. Naloxone at 40-μg increments was administered intravenously and corrected the hypothermia. Awareness of hypothermia postoperatively with associated morphine administration through subarachnoid block must be ruled out in cases of progressing hypothermia.