title: Temperature management during off-pump coronary artery bypass graft surgery: a randomized clinical trial on the efficacy of a circulating water system versus a forced-air system.
abstract: OBJECTIVE
  The aim of this study was to evaluate the performance of a new temperature management system specifically designed for cardiac surgery (Allon ThermoWrapping Thermoregulation System; MTRE Advanced Technologies Ltd, Or Akiva, Israel) using a circulating-water garment and to compare it with a conventional forced-air cover system in order to determine whether it could reduce the incidence of perioperative hypothermia during off-pump coronary artery bypass graft (OPCAB) surgery.
  
  
  METHODS
  Prospective, randomized.
  
  
  METHODS
  University, tertiary care hospital.
  
  
  METHODS
  Thirty-one patients undergoing primary OPCAB surgery.
  
  
  METHODS
  Patients undergoing OPCAB surgery were randomized into the new thermoregulation system, Allon (study group, n = 15), and the standard forced-air system, Bair Hugger (Sterile Cardiac Access blanket Model 645; Augustine SA, Berne, Switzerland) (control group, n = 16).
  
  
  RESULTS
  Rectal temperature was recorded each 30 minutes during surgery and at intensive care unit arrival. Patients in the study group had higher temperatures than the control group at all time points, and the difference reached statistical significance after 2 hours of surgery. Moreover, fewer patients in the study group suffered perioperative hypothermia (defined as rectal temperature <36 degrees C) than the control group (2/15 patients (13.3%) in the study group v 13/16 (81.3%) in the control group [p = 0.0006]). No difference in other outcomes was noted. None of the patients died in the hospital. There were no adverse events reported.
  
  
  CONCLUSIONS
  The circulating-water garment, Allon ThermoWrapping Thermoregulation System, maintained normothermia during OPCAB surgery better than forced-air systems, especially after the first 2 hours of surgery, and it was not associated with surgical field disturbance.
authors.affiliation: Department of Cardiovascular Anesthesia and Intensive Care, IRCCS San Raffaele Hospital, Milan, Italy.
authors.forename: Alberto
authors.initials: A
authors.lastname: Zangrillo
authors.forename: Federico
authors.initials: F
authors.lastname: Pappalardo
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Talò
authors.forename: Chiara
authors.initials: C
authors.lastname: Corno
authors.forename: Giovanni
authors.initials: G
authors.lastname: Landoni
authors.forename: Annamara
authors.initials: A
authors.lastname: Scandroglio
authors.forename: Concetta
authors.initials: C
authors.lastname: Rosica
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Crescenzi
mesh_terms: D000368:Aged; D000388:Air; D001831:Body Temperature; D047549:Coronary Artery Bypass, Off-Pump / Q000295:instrumentation* / Q000379:methods; D005260:Female; D006801:Humans; D007035:Hypothermia / Q000517:prevention & control; D007431:Intraoperative Complications / Q000517:prevention & control; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D017694:Rewarming / Q000295:instrumentation* / Q000379:methods; D013997:Time Factors; D016896:Treatment Outcome; D014867:Water
chemical_list: D014867:Water