Resistive-Polymer Versus Forced-Air Warming: Comparable Efficacy in Orthopedic Patients

Brandt, Sebastian; Oguz, Ruken; Hüttner, Hendrik; Waglechner, Günther; Chiari, Astrid; Greif, Robert; Kurz, Andrea; Kimberger, Oliver (2010). Resistive-Polymer Versus Forced-Air Warming: Comparable Efficacy in Orthopedic Patients. Anesthesia and analgesia, 110(3), pp. 834-838. Hagerstown, Md.: Lippincott Williams & Wilkins 10.1213/ANE.0b013e3181cb3f5f

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BACKGROUND: Several adverse consequences are caused by mild perioperative hypothermia. Maintaining normothermia with patient warming systems, today mostly with forced air (FA), has thus become a standard procedure during anesthesia. Recently, a polymer-based resistive patient warming system was developed. We compared the efficacy of a widely distributed FA system with the resistive-polymer (RP) system in a prospective, randomized clinical study. METHODS: Eighty patients scheduled for orthopedic surgery were randomized to either FA warming (Bair Hugger warming blanket #522 and blower #750, Arizant, Eden Prairie, MN) or RP warming (Hot Dog Multi-Position Blanket and Hot Dog controller, Augustine Biomedical, Eden Prairie, MN). Core temperature, skin temperature (head, upper and lower arm, chest, abdomen, back, thigh, and calf), and room temperature (general and near the patient) were recorded continuously. RESULTS: After an initial decrease, core temperatures increased in both groups at comparable rates (FA: 0.33 degrees C/h +/- 0.34 degrees C/h; RP: 0.29 degrees C/h +/- 0.35 degrees C/h; P = 0.6). There was also no difference in the course of mean skin and mean body (core) temperature. FA warming increased the environment close to the patient (the workplace of anesthesiologists and surgeons) more than RP warming (24.4 degrees C +/- 5.2 degrees C for FA vs 22.6 degrees C +/- 1.9 degrees C for RP at 30 minutes; P(AUC) <0.01). CONCLUSION: RP warming performed as efficiently as FA warming in patients undergoing orthopedic surgery.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Intensive Care, Emergency Medicine and Anaesthesiology (DINA) > Clinic and Policlinic for Anaesthesiology and Pain Therapy

UniBE Contributor:

Brandt, Sebastian and Greif, Robert


600 Technology > 610 Medicine & health




Lippincott Williams & Wilkins




Jeannie Wurz

Date Deposited:

04 Oct 2013 14:07

Last Modified:

23 Jan 2018 12:16

Publisher DOI:


PubMed ID:


Web of Science ID:


URI: (FactScience: 195682)

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