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  • Title: Warmed humidified inspired oxygen accelerates postoperative rewarming.
    Author: Frank SM, Hesel TW, El-Rahmany HK, Tran KM, Bamford OS.
    Journal: J Clin Anesth; 2000 Jun; 12(4):283-7. PubMed ID: 10960199.
    Abstract:
    STUDY OBJECTIVE: To investigate the efficacy of warmed, humidified inspired oxygen (O(2)) for the treatment of mildly hypothermic postoperative patients. DESIGN: Prospective, randomized, unblinded clinical trial. SETTING: Postanesthesia care unit in a tertiary care hospital. PATIENTS AND INTERVENTIONS: 30 ASA physical status I, II, and III patients following intraabdominal surgical procedures were randomly assigned to receive either routine O(2) therapy (control group, n = 15), or warmed (42 degrees C) humidified O(2) (treatment group, n = 15) for the initial 90 postoperative minutes. MEASUREMENTS: Core (tympanic) temperature, dry mouth score and shivering score. MAIN RESULTS: Tympanic temperature was similar in both groups on admission ( approximately 35.8 degrees C). Rewarming rate in the first postoperative hour was greater in the treatment group (0.7 +/- 0.1 degrees C. hr(-1)) compared to the control group (0.4 +/- 0.1 degrees C. hr(-1)) (p = 0.03). Patients receiving the warmed, humidified O(2) had a lower incidence of dry mouth compared to the control group (p = 0.03). The incidence of shivering was low and similar in both groups. CONCLUSIONS: Warming and humidifying inspired O(2) hastens recovery from hypothermia in postoperative patients.
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