Skin-surface warming: heat flux and central temperature

Area of Science:

• Medical Devices
• Thermoregulation
• Postoperative Care

Background:

• Maintaining normothermia is crucial in postoperative care to prevent complications.
• Various warming devices exist, but their comparative efficacy requires further investigation.

Purpose of the Study:

• To compare the efficacy of four different postoperative warming devices.
• To evaluate their impact on patient temperature and thermal comfort.

Main Methods:

• Five healthy volunteers were monitored for cutaneous and tympanic membrane temperatures.
• Heat loss/gain was measured using thermocouples and thermal flux transducers.
• Overall thermal comfort was assessed using a visual analog scale.

Main Results:

• The Bair Hugger (medium setting) reduced heat loss more than radiant heaters and as much as the circulating-water blanket.
• The Bair Hugger (high setting) increased skin temperature more than the circulating-water blanket.
• Circulating-water blanket was most effective for heating a chest transducer.

Conclusions:

• Forced air warming (Bair Hugger) and circulating-water blankets are superior to radiant heaters for postoperative warming.
• Device settings significantly influence warming efficacy and patient temperature management.