A Clinical Trial of Pulsed-dye Laser Versus Timolol Topical Solution Versus Observation on the Growth of Hemangioma in Newborn

Timolol maleate 0.5% ophthalmic solution will be used. The dose will be 1 drop per square centimeter of hemangioma, rubbed into the area by the parent/guardian twice daily. The intent is to cover the entire lesion without excess of medication. Therefore, the dose can be lowered from 1 drop/cm2 at the discretion of the investigators, but not increased. This dose should not have significant systemic side effects given that the normal systemic intravenous dose for propanolol is 2mg/kg/day and there would be much less systemic absorption if the solution is applied topically. It is well established that the stratum corneum greatly slows the transport of timolol.

A 595-nm PDL (V-beam Perfecta, Candela Corp, Wayland, MA, USA) with a dynamic cooling device (DCD) will be utilized for all treatments. This device is cleared by the FDA for clinical treatment of vascular lesions. Protective eyewear for patient and all participants in the treatment room will be provided. A spot size of 7 or 10 mm will be used with an average fluence (energy delivered per unit area, in J/cm2) of 9 J/cm2 (range 8-10.0 J/cm2). Fluence will vary according to patient and hemangioma characteristics, including age, skin type, location, lesion thickness and response to treatment. A 30-50 ms cryogen spray cooling (CSC) duration will precede the laser pulse duration of 0.4 ms.