Forced-Air Warming for Rewarming and Comfort Following Laparoscopy: A Randomized Controlled Trail

2017 ◽  
Vol 27 (5) ◽  
pp. 540-559 ◽  
Author(s):  
Hsiao-Chi Nieh ◽  
Shu-Fen Su
Keyword(s):  
Controlled Trial ◽  
Estimating Equation ◽  
Comfort Level ◽  
Tympanic Temperature ◽  
Postanesthesia Care Unit ◽  
Control Group ◽  
Randomized Controlled ◽  
Comfort Levels ◽  
Forced Air Warming ◽  
Forced Air

We investigated the efficacy of a forced-air warming (FAW) system on postoperative rewarming and comfort in patients undergoing laparoscopic surgery. In this randomized controlled trial, a total of 127 participants were randomly divided into the FAW group ( n = 64) and control group ( n = 63). The esophageal temperature was measured every 30 min during surgery, and the tympanic temperature and comfort levels were measured preoperatively and in the postanesthesia care unit (PACU). Data analysis used the generalized estimating equation. We found that there was a lower incidence of postoperative hypothermia in the FAW group compared with the control group, as well as a higher body temperature between 30 and 180 min in the PACU, a shorter time for rewarming, and a higher comfort level. Taken together, these results suggest that FAW is an effective rewarming technique for laparoscopic patients during surgery and in the PACU that improves comfort levels.

scholarly journals Induction techniques that reduce redistribution hypothermia: A prospective, randomized, controlled, single blind study.

2019 ◽  
Author(s):  
Jonathan Roth ◽  
Leonard E Braitman ◽  
Lacy H. Hunt
Keyword(s):  
Nitrous Oxide ◽  
Blind Study ◽  
Control Group ◽  
Randomized Controlled ◽  
Forced Air Warming ◽  
The Mean ◽  
Forced Air ◽  
Oxygen Group ◽  
Oxide Group ◽  
Single Blind

Abstract BACKGROUND While much effort has been devoted to correcting intraoperative hypothermia, less attention has been directed to preventing redistribution hypothermia. In this study, we compared three different induction techniques to standard IV propofol inductions (control) in their effect on reducing redistribution hypothermia. METHODS Elective, afebrile patients, age 18 to 55 years, were randomly assigned to one of four groups (n=50 each). Group “INH/100” was induced with 8% sevoflurane in 100% oxygen, Group “INH/50” with 8% sevoflurane in 50% oxygen and 50% nitrous oxide, Group “PROP” with 2.2 mg/kg propofol, and Group “Phnl/PROP” with 2.2 mg/kg propofol immediately preceded by 160 mcg phenylephrine. Patients were maintained with sevoflurane in 50% nitrous oxide and 50% oxygen in addition to opioid narcotic. Forced air warming was used. Core temperatures were recorded every 15 minutes after induction for one hour. (Inhalation inductions only were also studied in patients age >55 years.) RESULTS Compared to control group PROP, the mean temperatures in groups INH/100, INH/50, and Phnl/PROP were higher 15, 30, 45 and 60 minutes after induction (p<0.0001 for all comparisons), averaging between 0.39oC and 0.54oC higher. In group PROP, 60% of patients had at least one temperature below 36.0oC in the first hour whereas only 16% did in each of groups INH/100, INH/50, and Phnl/PROP (p<0.0001 in each group compared to PROP). (Inhalation inductions were also effective in reducing redistribution hypothermia in patients age >55 years.) CONCLUSIONS Inhalation inductions with sevoflurane or prophylactic phenylephrine bolus prior to propofol induction reduced the magnitude of redistribution hypothermia by an average of 0.4 to 0.5°C in patients aged 18 to 55 years. Registered on clinical-trials.gov as NCT02331108, November 20, 2014.

The Efficacy of a Resistive Heating Under-Patient Blanket Versus a Forced-Air Warming System: A Randomized Controlled Trial

2009 ◽  
Vol 108 (1) ◽  
pp. 199-201 ◽  
Author(s):  
Andrea Fanelli ◽  
Giorgio Danelli ◽  
Daniela Ghisi ◽  
Andrea Ortu ◽  
Elisa Moschini ◽  
...  
Keyword(s):  
Randomized Controlled Trial ◽  
Controlled Trial ◽  
Resistive Heating ◽  
Randomized Controlled ◽  
System A ◽  
Forced Air Warming ◽  
Forced Air

scholarly journals Induction techniques that reduce redistribution hypothermia:  A prospective, randomized, controlled, single blind effectiveness study.

2019 ◽  
Author(s):  
Jonathan Roth ◽  
Leonard E Braitman ◽  
Lacy H. Hunt
Keyword(s):  
Nitrous Oxide ◽  
Control Group ◽  
Anesthetic Induction ◽  
Randomized Controlled ◽  
Forced Air Warming ◽  
The Mean ◽  
Forced Air ◽  
Oxygen Group ◽  
Oxide Group ◽  
Single Blind

Abstract BACKGROUND While much effort has been devoted to correcting intraoperative hypothermia, less attention has been directed to preventing redistribution hypothermia. In this study, we compared three different anesthetic induction techniques to standard IV propofol inductions (control) in their effect on reducing redistribution hypothermia. METHODS Elective, afebrile patients, age 18 to 55 years, were randomly assigned to one of four groups (n=50 each). Group “INH/100” was induced with 8% sevoflurane in 100% oxygen, Group “INH/50” with 8% sevoflurane in 50% oxygen and 50% nitrous oxide, Group “PROP” with 2.2 mg/kg propofol, and Group “Phnl/PROP” with 2.2 mg/kg propofol immediately preceded by 160 mcg phenylephrine. Patients were maintained with sevoflurane in 50% nitrous oxide and 50% oxygen in addition to opioid narcotic. Forced air warming was used. Core temperatures were recorded every 15 minutes after induction for one hour. RESULTS Compared to control group PROP, the mean temperatures in groups INH/100, INH/50, and Phnl/PROP were higher 15, 30, 45 and 60 minutes after induction (p<0.001 for all comparisons), averaging between 0.39oC and 0.54oC higher. In group PROP, 60% of patients had at least one temperature below 36.0oC in the first hour whereas only 16% did in each of groups INH/100, INH/50, and Phnl/PROP (p<0.0001 in each group compared to PROP). CONCLUSIONS In this effectiveness trial, inhalation inductions with sevoflurane or with prophylactic phenylephrine bolus prior to propofol induction reduced the magnitude of redistribution hypothermia by an average of 0.4 to 0.5°C in patients aged 18 to 55 years. Retrospectively registered on clinical-trials.gov as NCT02331108, November 20, 2014. Abstract uploaded to: http://www.persistent-identifier.nl/?identifier=urn%3Anbn%3Anl%3Aui%3A13-lo-lchp

scholarly journals Forced air warming during sedation in the cardiac catheterisation laboratory: a randomised controlled trial

Heart ◽  
2017 ◽  
Vol 104 (8) ◽  
pp. 685-690 ◽  
Author(s):  
Aaron Conway ◽  
Suzanna Ersotelos ◽  
Joanna Sutherland ◽  
Jed Duff
Keyword(s):  
Randomised Controlled Trial ◽  
Thermal Comfort ◽  
Controlled Trial ◽  
Cardiac Catheterisation ◽  
Control Group ◽  
Major Complications ◽  
Forced Air Warming ◽  
Forced Air ◽  
Randomised Controlled ◽  
Catheterisation Laboratory

ObjectiveForced air warming (FAW) during general anaesthesia is a safe and effective intervention used to reduce hypothermia. The objective of this study was to determine if FAW reduces hypothermia when used for procedures performed with sedation in the cardiac catheterisation laboratory.MethodsA parallel-group randomised controlled trial was conducted. Adults receiving sedation in a cardiac catheterisation laboratory at two sites were randomised to receive FAW or usual care, which involved passive warming with heated cotton blankets. Hypothermia, defined as a temperature less than 36°C measured with a sublingual digital thermometer after procedures, was the primary outcome. Other outcomes were postprocedure temperature, shivering, thermal comfort and major complications.ResultsA total of 140 participants were randomised. Fewer participants who received FAW were hypothermic (39/70, 56% vs 48/69, 70%, difference 14%; adjusted RR 0.75, 95% CI=0.60 to 0.94), and body temperature was 0.3°C higher (95% CI=0.1 to 0.5, p=0.004). FAW increased thermal comfort (63/70, 90% vs51/69, 74% difference 16%, RR 1.21, 95% CI=1.04 to 1.42). The incidence of shivering was similar (3/69, 4% vs 0/71 0%, difference 4%, 95% CI=−1.1 to 9.8). One patient in the control group required reintervention for bleeding. No other major complications occurred.ConclusionFAW reduced hypothermia and improved thermal comfort. The difference in temperature between groups was modest and less than that observed in previous studies where use of FAW decreased risk of surgical complications. Therefore, it should not be considered clinically significant.Trial registration numberACTRN12616000013460.

scholarly journals Effects of 10-min of pre-warming on inadvertent perioperative hypothermia in intraoperative warming patients: a randomized controlled trial

2020 ◽  
Vol 15 (3) ◽  
pp. 356-364
Author(s):  
Jae Hwa Yoo ◽  
Si Young Ok ◽  
Sang Ho Kim ◽  
Ji Won Chung ◽  
Sun Young Park ◽  
...  
Keyword(s):  
Body Temperature ◽  
Thermal Comfort ◽  
Elective Surgery ◽  
Controlled Trial ◽  
Randomized Study ◽  
Perioperative Period ◽  
Control Group ◽  
Perioperative Hypothermia ◽  
Randomized Controlled ◽  
Forced Air

Background: This study aimed to evaluate the efficacy of 10-min pre-warming in preventing inadvertent perioperative hypothermia, which is defined as a reduction in body temperature to less than 36.0℃ during the perioperative period in intraoperative warming patients. Methods: In this prospective randomized study, 60 patients scheduled for elective surgery under general anesthesia lasting less than 120 min were divided into two groups: the 10-min pre-warming group (n = 30) and the control group (n = 30). Patients in the 10-min pre-warming group were pre-warmed for 10 min in the pre-anesthetic area using a forced-air warmer set at 47ºC. Intraoperatively, we warmed all patients with a forced-air warmer. Body temperature was measured using a tympanic membrane thermometer pre- or postoperatively and a nasopharyngeal temperature probe intraoperatively. Patients were evaluated on the shivering and thermal comfort scale in the pre-anesthetic area and post-anesthesia care unit. Results: The incidences of intraoperative hypothermia and postoperative hypothermia were similar in both groups (10.7% vs. 28.6%, P = 0.177; 10.7% vs. 10.7%, P = 1.000 respectively). Body temperature was higher in the 10-min pre-warming group (P = 0.003). Thermal comfort during the pre-warming period was higher in the 10-min pre-warming group (P < 0.001). However, postoperative thermal comfort and shivering grades of both groups were similar.Conclusions: Ten minutes of pre-warming has no additional effect on the prevention of inadvertent perioperative hypothermia in intraoperative warming patients.

scholarly journals Induction techniques that reduce redistribution hypothermia: a prospective, randomized, controlled, single blind effectiveness study

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Jonathan V. Roth ◽  
Leonard E. Braitman ◽  
Lacy H. Hunt
Keyword(s):  
Nitrous Oxide ◽  
Control Group ◽  
Anesthetic Induction ◽  
Randomized Controlled ◽  
Forced Air Warming ◽  
The Mean ◽  
Forced Air ◽  
Oxygen Group ◽  
Oxide Group ◽  
Single Blind

Abstract Background While much effort has been devoted to correcting intraoperative hypothermia, less attention has been directed to preventing redistribution hypothermia. In this study, we compared three different anesthetic induction techniques to standard IV propofol inductions (control) in their effect on reducing redistribution hypothermia. Methods Elective, afebrile patients, age 18 to 55 years, were randomly assigned to one of four groups (n = 50 each). Group “INH/100” was induced with 8% sevoflurane in 100% oxygen, Group “INH/50” with 8% sevoflurane in 50% oxygen and 50% nitrous oxide, Group “PROP” with 2.2 mg/kg propofol, and Group “Phnl/PROP” with 2.2 mg/kg propofol immediately preceded by 160 mcg phenylephrine. Patients were maintained with sevoflurane in 50% nitrous oxide and 50% oxygen in addition to opioid narcotic. Forced air warming was used. Core temperatures were recorded every 15 min after induction for 1 h. Results Compared to control group PROP, the mean temperatures in groups INH/100, INH/50, and Phnl/PROP were higher 15, 30, 45 and 60 min after induction (p < 0.001 for all comparisons), averaging between 0.39 °C and 0.54 °C higher. In group PROP, 60% of patients had at least one temperature below 36.0 °C in the first hour whereas only 16% did in each of groups INH/100, INH/50, and Phnl/PROP (p < 0.0001 in each group compared to PROP). Conclusions In this effectiveness trial, inhalation inductions with sevoflurane or with prophylactic phenylephrine bolus prior to propofol induction reduced the magnitude of redistribution hypothermia by an average of 0.4 to 0.5 °C in patients aged 18 to 55 years. Trial registration Retrospectively registered on clinical-trials.gov as NCT02331108, November 20, 2014.

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