Effects of ambient room temperature on cold air cooling during laser hair removal

Effects of ambient room temperature on cold air cooling during laser hair removal
September 2007
Ramin Ram, MD, & Alan Rosenbach, MD
Blackwell Synergy

Summary

Forced air cooling is a well-established technique that protects the epidermis during laser heating of deeper structures, thereby allowing for increased laser fluences. The goal of this prospective study was to identify whether an elevation in ambient room temperature influences the efficacy of forced air cooling. Skin surface temperatures were measured on 24 sites (12 subjects) during cold air exposure in examination rooms with ambient temperatures of 72?F (22.2?C) and 82?F (27.8?C), respectively. Before cooling, mean skin surface temperature was 9?F (5?C) higher in the warmer room (P < 0.01). Immediately after exposure to forced air cooling (within 1 s), the skin surface temperature remained considerably higher (10.75?F, or 5.8?C, P < 0.01) in the warmer room. We conclude that forced air cooling in a room with an ambient temperature of 82?F (27.8?C) is not as effective as in a room that is at 72?F (22.2?C).

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