• Jed Duff, Renatta Di Staso, Kerry-Anne Cobbe, Nicole Draper, Simon Tan, Emma Halliday, Sandy Middleton, Lawrence Lam, and Kim Walker.
• St Vincent's Private Hospital, and Nursing Research Institute, St Vincent’s & Mater Health Sydney-Australian Catholic University, Victoria Street, Darlinghurst, NSW, 2010, Australia. jduff@stvincents.com.au
• Bmc Surg. 2012 Jan 1;12:14.

BackgroundPatients having arthroscopic shoulder surgery frequently experience periods of inadvertent hypothermia. This common perioperative problem has been linked to adverse patient outcomes such as myocardial ischaemia, surgical site infection and coagulopathy. International perioperative guidelines recommend patient warming, using a forced air warming device, and the use of warmed intraoperative irrigation solutions for the prevention of hypothermia in at-risk patient groups. This trial will investigate the effect of these interventions on patients' temperature, thermal comfort, and total recovery time.Method/DesignThe trial will employ a randomised 2 x 2 factorial design. Eligible patients will be stratified by anaesthetist and block randomised into one of four groups: Group one will receive preoperative warming with a forced air warming device; group two will receive warmed intraoperative irrigation solutions; group three will receive both preoperative warming and warmed intraoperative irrigation solutions; and group four will receive neither intervention. Participants in all four groups will receive active intraoperative warming with a forced air warming device. The primary outcome measures are postoperative temperature, thermal comfort, and total recovery time. Primary outcomes will undergo a two-way analysis of variance controlling for covariants such as operating room ambient temperature and volume of intraoperative irrigation solution.DiscussionThis trial is designed to confirm the effectiveness of these interventions at maintaining perioperative normothermia and to evaluate if this translates into improved patient outcomes. AUSTRALIAN NEW ZEALAND CLINICAL TRIALS REGISTRY NUMBER: ACTRN12610000591055.

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