The topical application of different galenic formulations can alter the thermographic images of skin: Limitations for public thermal screening on infection control situations

The effect of different galenic formulations on fast thermal changes in the skin was studied by thermographic images. Example of the evolution of face thermal changes after application of hydroalcoholic gel on the right half of the face of a volunteer. A significant decrease of more than 1.0°C was observed just 1 minute after hydroalcoholic gel application that recovered after 8 minutes. Experiments on the back of volunteers showed a mean thermal drop of more than 2°C. It could be possible to detect false negative data in the readings of patients screened thermically.ga1