Effect of Pre-warming by Forced Air warmer during Total Hip and knee Arthroplasties for Perioperative and Postoperative Hypothermia
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Abstract
Backgrounds: Hypothermia is common problem during
total hip and total knee arthroplasties under spinal
anesthesia. There are many complications such as wound
infections, coagulopathies, respiratory complications,
delayed recovery time and delayed length of stay.
Objective: To study the effect of preoperative warming by
forced air warming device in patients undergoing total hip
or total knee arthroplasties on hypothermia and shivering
during intraoperative and postoperative periods.
Methods: A prospective analytic study in 120 patients
undergoing hip or knee arthroplasties. The patients who
were admitted to the preoperative room were randomized
into 2 groups, preoperative warming group and no
preoperative warming group. Preoperative warming group
using forced air warming device had set 38˚C for 30
minutes. Tympanic temperature was measured on both
groups every 15 minutes in preoperative period until the
patients had discharged from the recovery room.
Results: Preoperative warming group was significantly
less hypothermia than no preoperative warming group
during perioperative (1.7% vs 58.3%; p<0.001) and
postoperative periods (5.0% vs 61.7%; p<0.001). No
patient in preoperative warming group showed shivering.
Preoperative warming group was significantly higher
temperature than no preoperative warming at all points of
measurement.
Conclusion: The study showed preoperative warming
was significantly reduced incidence of hypothermia and
shivering during intraoperative and postoperative periods
in patients undergoing total hip and total knee arthroplasties
under spinal anesthesia.
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