Hypothermia; Anesthesia
Conditions
Keywords
Perioperative hypothermia, Core body temperature, Prewarming, Gynecologic laparoscopic surgery
Brief summary
Previous research has shown beneficial effects of prewarming on preventing inadvertent perioperative hypothermia (IPH). Warming the surface of the body before the induction of anesthesia can reduce the temperature difference between the core and periphery, thereby reducing the degree of core-to-peripheral thermal redistribution. It has been proved that initiation of warming before surgery can be more useful for preventing IPH than warming only during surgery. Nevertheless, there are not many researches on effects of short period (\<30 min) prewarming, especially in gynecologic laparoscopic surgery. Accordingly, the investigators designed this study to test if IPH can be effectively prevented when 10 minutes of prewarming is added to intraoperative active warming in patients undergoing gynecologic laparoscopic surgery.
Interventions
DEVICEPrewarming
In the operating theater, participants allocated in Prewarming group received 10 min-prewarming, which is cutaneous warming before induction of anesthesia. For prewarming, forced air warming system (WarmTouch WT 6000 Warming Unit, Medtronic, Minneapolis, MN, USA) was used and the warming temperature of the device was set to 45°C.
Sponsors
Daegu Catholic University Medical Center
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
DOUBLE (Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
FEMALE
Age
19 Years to 75 Years
Healthy volunteers
No
Inclusion criteria
* ASA physical status 1 or 2 patients * patients who underwent gynecologic laparoscopic surgery under general anesthesia
Exclusion criteria
* preexisting hypothermia (\<36℃) or hyperthermia (\>37.5℃) * anesthesia last for \<1 hour or \>2 hours * conversion from laparoscopic surgery to laparotomy * patients with a body mass index (BMI) ≥ 31kg/m2 * patients with known thyroid disease
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| the incidence of intraoperative hypothermia | on arrival at operating theater, before anesthesia induced, every 15 minutes after anesthetic induction until admission to the post anesthetic care unit (PACU) | Number of Participants whose core temperature was than 36℃ was recorded at each time point. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| the incidence of postoperative shivering | on the admission to PACU, 30 minutes after the admission to PACU | Number of Participants who suffer shivering at the post anesthetic care unit was recorded. Postoperative shivering was graded by an investigator who did not know the procedure in the operating room; shivering grade was divided into four grades (0 = none, 1 = mild, 2 = moderate, 3 = severe, The Bedside Shivering Assessment Scale) |
| Time-temperature interaction during the first 1 hour of anesthesia | Core body temperature was recorded at 15-min intervals from initiation of anesthesia for 1 hour. | Core body temperature was recorded at each time point. Time-temperature interaction of 2 groups during the first 1 hour of anesthesia was analyzed by RMANOVA |
Countries
South Korea
Outcome results
None listed