PDT represents the cutting edge of research in light based medicine, and works in two stages:
i)a photosensitizer is applied to the skin, and the body converts this into a chemical (often the naturally occurring chemical Protoporphyrin IX or PpIX).
ii)The PpIX created responds to light within a certain waveband, provided by the Ellipse PR+ or PL+ applicators.
Two of the Ellipse applicators are approved as the Light source for PDT treatments of the skin. The PR+ applicator is already known for its use in vascular and photorejuvenation treatments. This applicator matches three of the PpIX absorption peaks, allowing a photochemical pathway to be added to existing acne and photorejuvenation treatments. Because of the wavelengths and pulse times used, the PR+ applicator is suitable for patients of Fitzpatrick Skin Types 1 to 3, with zero or light suntan. The PL+ applicator - the latest addition to the Ellipse PLUS series – matches all 5 PpIX absorption peaks. By offering a series of longer, low energy passes, it offers a comfortable treatment suitable for slightly more tanned patients, or those of Skin Types 1 to 4.