title: Comparison of Conductive and Convective Warming in Patients Undergoing Video-Assisted Thoracic Surgery: A Prospective Randomized Clinical Trial.
abstract: BackgroundPerioperative hypothermia is frequent during thoracic surgery. After approval by the local ethics committee and written informed consent from patients, we examined the efficiency of prewarming and intraoperative warming with a convective warming system and conductive warming system to prevent perioperative hypothermia during video-assisted thoracic surgery (VATS).MethodsWe randomized 60 patients with indication for VATS in two groups (convective warming with an underbody blanket vs. conductive warming with an underbody mattress and additional warming of the legs). All patients were prewarmed before induction of anesthesia with the corresponding system. Core temperature was measured sublingual and in the nasopharynx.ResultsBoth groups were not significantly different in regard to clinical parameter, prewarming, and initial core temperature. The patients in conduction group had lower intraoperative core temperatures and a higher incidence of intraoperative (73.9 vs. 24%) and postoperative hypothermia (56.5 vs. 8%) compared with convective warming.ConclusionsPre- and intraoperative convective warming with an underbody blanket prevents perioperative hypothermia during VATS better than conductive warming. The inferior prevention in conductive warming group may be caused by reduced body contact to the warming mattresses in lateral position.
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, University Medical Center, Georg-August University, Goettingen, Germany.
authors.forename: Alexander
authors.initials: A
authors.lastname: Emmert
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, University Medical Center, Georg-August University, Goettingen, Germany.
authors.forename: Robert
authors.initials: R
authors.lastname: Franke
authors.affiliation: Department of Anesthesiology, University Medical Center, Georg-August University,Goettingen, Germany.
authors.forename: Ivo Florian
authors.initials: IF
authors.lastname: Brandes
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, University Medical Center, Georg-August University, Goettingen, Germany.
authors.forename: Marc
authors.initials: M
authors.lastname: Hinterthaner
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, University Medical Center, Georg-August University, Goettingen, Germany.
authors.forename: Bernhard C
authors.initials: BC
authors.lastname: Danner
authors.affiliation: Department of Anesthesiology, University Medical Center, Georg-August University,Goettingen, Germany.
authors.forename: Martin
authors.initials: M
authors.lastname: Bauer
authors.affiliation: Department of Anesthesiology, University Medical Center, Georg-August University,Goettingen, Germany.
authors.forename: Anselm
authors.initials: A
authors.lastname: Bräuer
mesh_terms: D000368:Aged; D001512:Bedding and Linens; D001833:Body Temperature Regulation; D018481:Convection; D004867:Equipment Design; D005260:Female; D005858:Germany; D006361:Heating / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D007035:Hypothermia / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology / Q000517:prevention & control*; D008297:Male; D008875:Middle Aged; D016343:Monitoring, Intraoperative / Q000379:methods; D056888:Patient Positioning; D019990:Perioperative Care; D011446:Prospective Studies; D020775:Thoracic Surgery, Video-Assisted / Q000009:adverse effects*; D013997:Time Factors; D016896:Treatment Outcome