title: Lipid-emulsion propofol less attenuates the regulation of body temperature than micro-emulsion propofol or sevoflurane in the elderly.
abstract: OBJECTIVE
  Anesthesia and surgery commonly cause hypothermia, and this caused by a combination of anesthetic-induced impairment of thermoregulatory control, a cold operation room environment and other factors that promote heat loss. All the general anesthetics markedly impair normal autonomic thermoregulatory control. The aim of this study is to evaluate the effect of two different types of propofol versus inhalation anesthetic on the body temperature.
  
  
  METHODS
  In this randomized controlled study, 36 patients scheduled for elective laparoscopic gastrectomy were allocated into three groups; group S (sevoflurane, n=12), group L (lipid-emulsion propofol, n=12) and group M (micro-emulsion propofol, n=12). Anesthesia was maintained with typical doses of the study drugs and all the groups received continuous remifentanil infusion. The body temperature was continuously monitored after the induction of general anesthesia until the end of surgery.
  
  
  RESULTS
  The body temperature was decreased in all the groups. The temperature gradient of each group (group S, group L and group M) at 180 minutes from induction of anesthesia was 2.5 ± 0.6°C, 1.6 ± 0.5°C and 2.3 ± 0.6°C, respectively. The body temperature of group L was significantly higher than that of group S and group M at 30 minutes and 75 minute after induction of anesthesia, respectively. There were no temperature differences between group S and group M.
  
  
  CONCLUSIONS
  The body temperature is maintained at a higher level in elderly patients anesthetized with lipid-emulsion propofol.
authors.affiliation: Department of Anesthesiology and Pain Medicine, Chonnam National University Medical School, Gwangju, Korea.
authors.forename: Cheol Won
authors.initials: CW
authors.lastname: Jeong
authors.forename: Jin
authors.initials: J
authors.lastname: Ju
authors.forename: Dae Wook
authors.initials: DW
authors.lastname: Lee
authors.forename: Seong Heon
authors.initials: SH
authors.lastname: Lee
authors.forename: Myung Ha
authors.initials: MH
authors.lastname: Yoon
mesh_terms: D000368:Aged; D000375:Aging; D000768:Anesthesia, General / Q000379:methods*; D019162:Anesthetics, Combined / Q000008:administration & dosage; D018685:Anesthetics, Inhalation / Q000008:administration & dosage*; D018686:Anesthetics, Intravenous / Q000008:administration & dosage*; D001831:Body Temperature / Q000187:drug effects*; D001833:Body Temperature Regulation / Q000187:drug effects; D005217:Fat Emulsions, Intravenous; D005260:Female; D006801:Humans; D008297:Male; D008738:Methyl Ethers / Q000008:administration & dosage*; D008875:Middle Aged; D015742:Propofol / Q000008:administration & dosage*; D000077149:Sevoflurane
chemical_list: D019162:Anesthetics, Combined; D018685:Anesthetics, Inhalation; D018686:Anesthetics, Intravenous; D005217:Fat Emulsions, Intravenous; D008738:Methyl Ethers; D000077149:Sevoflurane; D015742:Propofol