Hypothermia occurs frequently during general anesthesia. This study is to evaluate the efficacy of 10 minutes of prewarming during induction of general anesthesia during urologic surgery.
Hypothermia is of continuous issue in patients undergoing general anesthesia. During urologic operation (transurethral resection of bladder and prostate), bladder irrigation worsens hypothermia. Hence, various methods including prewarming of the patient are used to maintain core temperature during operation. Prewarming is found to be effective in maintaining core temperature perioperatively by increasing peripheral tissue heat content. However, applying more than 30 minutes of prewarming may be impractical as a clinical routine practice. Hence, developing simple and effective method to prevent hypothermia is expected. Here, the investigators planned to examine the effect of active warming (10 minutes of warming during induction of general anesthesia and prewarmed intravenous fluid intraoperatively) on hypothermia in patients undergoing urologic operation under general anesthesia.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
SINGLE
Enrollment
50
Warming group patients are applied air-forced warming device (bair-hugger 43'C) with blanket (warm touch, COVIDIEN, full body blanket) during induction of anesthesia in the operation room.
Prewarmed intravenous fluid is connected.
Sanggye paik hospital
Seoul, South Korea
incidence of hypothermia at the end of the operation
number of patients with hypothermia (\<36'C) using esophageal stethoscope will be recorded.
Time frame: approximately 1-2hours after induction (at the end of operation)
change in temperature drop before and end of operation
change in core temperature will be observed
Time frame: on arrival at the OR upto 1-2hours after induction (at the end of the operation)
thermal comfort
thermal comfort scale ( 0= very cold, 5= fine, 10= very hot and uncomfortable) will be used.
Time frame: upto 1hour after end of the operation (at discharge of postanesthesia care unit)
incidence of shivering
4 point shivering scale (0=none, 1=core and neck shivering, 2= upper extremity 3= whole body) will be used.
Time frame: upto 1 hour after end of the operation (on arrival at the postanesthesia care unit)
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