This study evaluates the effect of active prewarming on the frequency and duration of perioperative hypothermia. 50% of patients will receive active warming with forced-air devices prior to entering the operating room, and the other 50% will not receive any active heating measures.
Inadvertent perioperative hypothermia is defined as a body temperature below 36º C during the perioperative period. It occurs as a result of the effects of anesthetic drugs on the regulation of body temperature and exposure to a cold environment. The main temperature loss during the perioperative period occurs during the first hour after the anesthetic induction as a result of heat redistribution from the central compartment to the peripheral compartment The most effective strategy to prevent perioperative hypothermia is the use of forced-air warming devices. These devices are usually initiated once the patient enters the operating room. At that time, the patient has already initiated the heat loss by distributing heat from the central to the peripheral compartment to maintain body temperature. We intend to use forced-air warming devices before the patients is transferred to the operating room in order to preserve the peripheral body temperature. This way the redistribution of heat should be avoided and, therefore, perioperative hypothermia and its harmful effects will be prevented.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Enrollment
197
In the treatment group, heating will be started with a pre-surgical forced-air blanket "Outpatient Warming Blanket model 11101 Bair Hugger from 3M" and a forced-air heating unit "Bair Hugger Warming Unit Model 775 from 3M" at 38-43º C which will be maintain during the stay in the pre-surgery room until the transfer to the operating room
Hospital Universitario de Torrejon
Torrejón de Ardoz, Madrid, Spain
Perioperative hypothermia
Core temperature below 36º C measured with 3M Spot On monitor every 5 minutes from arrival to the pre-surgical area, during surgery and unit discharge to the ward
Time frame: From 1 hour to 12 hours
Hypothermia duration
Time of core temperature below 36º C measured every 5 minutes with 3M Spot On monitor from arrival to the surgery room and unit discharge to postoperative unit.
Time frame: Minutes with core temperature below 36ºC from arrival to the OR unit discharge to postoperative unit, up to 10 hours, whichever came first.
Hospital stay
Patient´s days keep in hospital, from admission in hospital until discharge from the home
Time frame: From date of Admission in hospital until the date of discharge from hospital, assessed up to 120 days.
Surgical site infection
Follow-up the wound and evaluation of signs and symptoms of surgical site infection from surgery to review for the nurse.
Time frame: 1 Month
Prewarming duration
Time from pre-warming initiation in pre operative area with forced air warming device until transfer to operating theatre.
Time frame: From 10 minutes to 1 hour
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