Variability of pulsed energy outputs from three dermatology lasers during multiple simulated treatments

Dermatology laser treatments are undertaken at regional departments using lasers of different powers and wavelengths. In order to achieve good outcomes, there needs to be good consistency of laser output across different weeks as it is custom and practice to break down the treatments into individual fractions. Departments will also collect information from test patches to help decide on the most appropriate treatment parameters for individual patients.

The objective of these experiments is to assess the variability of the energy outputs from a small number of lasers across multiple weeks at realistic parameters.

The energy outputs from 3 lasers were measured at realistic treatment parameters using a thermopile detector across a period of 6 weeks.

All lasers fired in single-pulse mode demonstrated good repeatability of energy output. In spite of one of the lasers being scheduled for a dye canister change in the next 2 weeks, there was good energy matching between the two devices with only a 4%-5% variation in measured energies.

Based on the results presented, clinical outcomes should not be influenced by variability in the energy outputs of the dermatology lasers used as part of the treatment procedure.