Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.]
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Comparative Study Clinical Trial Controlled Clinical Trial
Topical anesthesia for laser hair removal: comparison of spot sizes and 755 nm versus 800 nm wavelengths.
The Candela alexandrite and the Coherent diode laser systems come equipped with built-in skin cooling systems that are designed to both protect the epidermis, allowing higher fluences, and to alleviate discomfort. Nevertheless, pain can be a significant problem especially with treatment of larger areas. Scatter of the laser beam is reportedly affected by the spot size. It is claimed that larger spot sizes are more effective at identical fluences. ⋯ Topical 5% lidocaine cream is a simple and effective method for reducing patient discomfort during laser hair removal procedures, even when a skin cooling device is being used. A larger spot size causes more pain than a smaller spot size at identical fluences. The 800 nm diode laser causes greater discomfort than the 755 nm alexandrite laser.
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The purpose of this study was to quantitatively evaluate venous reflux in limbs with isolated superficial venous insufficiency using color duplex ultrasound. In addition, air plethysmography (APG) was used to investigate possible correlations of duplex-derived peak velocity, duration of reflux, and CEAP classification. ⋯ Severe chronic venous insufficiency is found in limbs with high reflux velocity (greater than 30 cm/second) and the duration of reflux does not correlate with severe chronic insufficiency.