Clinical trial NCT02518815: Preoperative Warming Prevents Postoperative Hypothermia in Laparoscopic Gynecologic Surgery. A Randomized Control Trial
Official title: Preoperative Active Warming Prevents Postoperative Hypothermia in Patients Undergoing Laparoscopic Gynecologic Surgery. A Randomized Control Trial
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Hypothermia Following Anesthesia
Hypothermia
Hypothermia, Accidental
Body Temperature Changes
Hypothermia Due to Anesthetic
Lead sponsor: Michael Garron Hospital
Sponsor class: OTHER
First posted: 2015-08-10
Enrollment: 42
Sex: FEMALE
Minimum age (years): 16
Standard ages: CHILD
ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: This study examined whether 20 minutes of prewarming prior to gynecological laparoscopic surgery prevented inadvertent post-operative hypothermia. Treatment group received prewarming using a forced air body warming, control group received no active warming system. Both groups were then warmed with forced air warmer intraoperatively.

Detailed description: Inadvertent perioperative hypothermia is a well known perioperative complication. The behavioural response to hypothermia is the most powerful protective tool, more effective than any autonomic response, and is obviously removed in the operative setting. Anesthesia alters thermoregulation by profoundly changing the thresholds for vasoconstriction and shivering, making patients vulnerable to the adverse outcomes related to mild hypothermia. Inadvertent postoperative hypothermia can occur in up to 70% of surgical patients. It is defined as a core temperature below 36°C (96.8°F). The aim of this study was to determine if prewarming with an active warming system for 20 minutes preoperatively could prevent postoperative inadvertent hypothermia.

Eligibility criteria: Inclusion Criteria:

* ASA I-III
* undergoing elective laparoscopic gynecological surgical procedures
* expected duration \>60 minutes
* BMI 18-45

Exclusion Criteria:

* Current fever (temperature\>38.1°C)
* active endocrine disorders were exclusion criteria

Primary outcomes:
measure: Oral temperature immediately postoperatively
timeFrame: Immediately post-operatively
Secondary outcomes:
measure: Oral temperature 30 minutes postoperatively
timeFrame: 30 min after admission to post-anesthetic care unit
measure: Oral temperature at discharge from post-anesthetic care unit
timeFrame: Discharge from post-anesthetic care unit (average 99 minutes)
measure: 11-point Pain score
timeFrame: 30 min after admission to post-anesthetic care unit
Other outcomes:
Locations:
city: Toronto
country: Canada
facility: Toronto East General Hospital
state: Ontario
Study officials:
affiliation: Michael Garron Hospital
name: James Kulchyk, MD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Bellamy C. Inadvertent hypothermia in the operating theatre: an examination. J Perioper Pract. 2007 Jan;17(1):18-25. doi: 10.1177/175045890701700102.
citation: Kurz A. Physiology of thermoregulation. Best Pract Res Clin Anaesthesiol. 2008 Dec;22(4):627-44. doi: 10.1016/j.bpa.2008.06.004.
citation: Annadata R, Sessler DI, Tayefeh F, Kurz A, Dechert M. Desflurane slightly increases the sweating threshold but produces marked, nonlinear decreases in the vasoconstriction and shivering thresholds. Anesthesiology. 1995 Dec;83(6):1205-11. doi: 10.1097/00000542-199512000-00011.
citation: Kurz A, Go JC, Sessler DI, Kaer K, Larson MD, Bjorksten AR. Alfentanil slightly increases the sweating threshold and markedly reduces the vasoconstriction and shivering thresholds. Anesthesiology. 1995 Aug;83(2):293-9. doi: 10.1097/00000542-199508000-00009.
citation: Matsukawa T, Kurz A, Sessler DI, Bjorksten AR, Merrifield B, Cheng C. Propofol linearly reduces the vasoconstriction and shivering thresholds. Anesthesiology. 1995 May;82(5):1169-80. doi: 10.1097/00000542-199505000-00012.
citation: Talke P, Tayefeh F, Sessler DI, Jeffrey R, Noursalehi M, Richardson C. Dexmedetomidine does not alter the sweating threshold, but comparably and linearly decreases the vasoconstriction and shivering thresholds. Anesthesiology. 1997 Oct;87(4):835-41. doi: 10.1097/00000542-199710000-00017.
citation: Sessler DI. Perioperative thermoregulation and heat balance. Ann N Y Acad Sci. 1997 Mar 15;813:757-77. doi: 10.1111/j.1749-6632.1997.tb51779.x.
citation: Buggy DJ, Crossley AW. Thermoregulation, mild perioperative hypothermia and postanaesthetic shivering. Br J Anaesth. 2000 May;84(5):615-28. doi: 10.1093/bja/84.5.615. No abstract available.
citation: Doufas AG. Consequences of inadvertent perioperative hypothermia. Best Pract Res Clin Anaesthesiol. 2003 Dec;17(4):535-49. doi: 10.1016/s1521-6896(03)00052-1.
citation: Reynolds L, Beckmann J, Kurz A. Perioperative complications of hypothermia. Best Pract Res Clin Anaesthesiol. 2008 Dec;22(4):645-57. doi: 10.1016/j.bpa.2008.07.005.
citation: Kurz A, Sessler DI, Lenhardt R. Perioperative normothermia to reduce the incidence of surgical-wound infection and shorten hospitalization. Study of Wound Infection and Temperature Group. N Engl J Med. 1996 May 9;334(19):1209-15. doi: 10.1056/NEJM199605093341901.
citation: Sessler DI, Schroeder M, Merrifield B, Matsukawa T, Cheng C. Optimal duration and temperature of prewarming. Anesthesiology. 1995 Mar;82(3):674-81. doi: 10.1097/00000542-199503000-00009.
citation: Vanni SM, Braz JR, Modolo NS, Amorim RB, Rodrigues GR Jr. Preoperative combined with intraoperative skin-surface warming avoids hypothermia caused by general anesthesia and surgery. J Clin Anesth. 2003 Mar;15(2):119-25. doi: 10.1016/s0952-8180(02)00512-3.
citation: Hocker J, Bein B, Bohm R, Steinfath M, Scholz J, Horn EP. Correlation, accuracy, precision and practicability of perioperative measurement of sublingual temperature in comparison with tympanic membrane temperature in awake and anaesthetised patients. Eur J Anaesthesiol. 2012 Feb;29(2):70-4. doi: 10.1097/EJA.0b013e32834cd6de.
citation: Amoateng-Adjepong Y, Del Mundo J, Manthous CA. Accuracy of an infrared tympanic thermometer. Chest. 1999 Apr;115(4):1002-5. doi: 10.1378/chest.115.4.1002.
citation: Frank SM, Fleisher LA, Breslow MJ, Higgins MS, Olson KF, Kelly S, Beattie C. Perioperative maintenance of normothermia reduces the incidence of morbid cardiac events. A randomized clinical trial. JAMA. 1997 Apr 9;277(14):1127-34.
citation: Melling AC, Ali B, Scott EM, Leaper DJ. Effects of preoperative warming on the incidence of wound infection after clean surgery: a randomised controlled trial. Lancet. 2001 Sep 15;358(9285):876-80. doi: 10.1016/S0140-6736(01)06071-8.
citation: Schmied H, Kurz A, Sessler DI, Kozek S, Reiter A. Mild hypothermia increases blood loss and transfusion requirements during total hip arthroplasty. Lancet. 1996 Feb 3;347(8997):289-92. doi: 10.1016/s0140-6736(96)90466-3.
citation: Winkler M, Akca O, Birkenberg B, Hetz H, Scheck T, Arkilic CF, Kabon B, Marker E, Grubl A, Czepan R, Greher M, Goll V, Gottsauner-Wolf F, Kurz A, Sessler DI. Aggressive warming reduces blood loss during hip arthroplasty. Anesth Analg. 2000 Oct;91(4):978-84. doi: 10.1097/00000539-200010000-00039.
citation: Horn EP, Bein B, Bohm R, Steinfath M, Sahili N, Hocker J. The effect of short time periods of pre-operative warming in the prevention of peri-operative hypothermia. Anaesthesia. 2012 Jun;67(6):612-7. doi: 10.1111/j.1365-2044.2012.07073.x. Epub 2012 Feb 29.
citation: Ott DE, Reich H, Love B, McCorvey R, Toledo A, Liu CY, Syed R, Kumar K. Reduction of laparoscopic-induced hypothermia, postoperative pain and recovery room length of stay by pre-conditioning gas with the Insuflow device: a prospective randomized controlled multi-center study. JSLS. 1998 Oct-Dec;2(4):321-9.
citation: Makinen MT. Comparison of body temperature changes during laparoscopic and open cholecystectomy. Acta Anaesthesiol Scand. 1997 Jun;41(6):736-40. doi: 10.1111/j.1399-6576.1997.tb04775.x.
citation: Luck AJ, Moyes D, Maddern GJ, Hewett PJ. Core temperature changes during open and laparoscopic colorectal surgery. Surg Endosc. 1999 May;13(5):480-3. doi: 10.1007/s004649901017.
citation: Peng Y, Zheng M, Ye Q, Chen X, Yu B, Liu B. Heated and humidified CO2 prevents hypothermia, peritoneal injury, and intra-abdominal adhesions during prolonged laparoscopic insufflations. J Surg Res. 2009 Jan;151(1):40-7. doi: 10.1016/j.jss.2008.03.039. Epub 2008 Apr 23.
citation: Nelskyla K, Yli-Hankala A, Sjoberg J, Korhonen I, Korttila K. Warming of insufflation gas during laparoscopic hysterectomy: effect on body temperature and the autonomic nervous system. Acta Anaesthesiol Scand. 1999 Nov;43(10):974-8. doi: 10.1034/j.1399-6576.1999.431002.x.
citation: Fernandes LA, Braz LG, Koga FA, Kakuda CM, Modolo NS, de Carvalho LR, Vianna PT, Braz JR. Comparison of peri-operative core temperature in obese and non-obese patients. Anaesthesia. 2012 Dec;67(12):1364-9. doi: 10.1111/anae.12002.x. Epub 2012 Oct 22.
citation: Nguyen NT, Fleming NW, Singh A, Lee SJ, Goldman CD, Wolfe BM. Evaluation of core temperature during laparoscopic and open gastric bypass. Obes Surg. 2001 Oct;11(5):570-5. doi: 10.1381/09608920160557039.
citation: De Witte JL, Demeyer C, Vandemaele E. Resistive-heating or forced-air warming for the prevention of redistribution hypothermia. Anesth Analg. 2010 Mar 1;110(3):829-33. doi: 10.1213/ANE.0b013e3181cb3ebf. Epub 2009 Dec 30.