Also known as blue light treatment, PDT uses a substance called photosensitizer together with a particular wavelength of light to destroy unwanted cells.
INDICATIONS
Actinic keratoses. AKs are irregular rough spots made up of sun-induced precancerous cells.
In research centers, some superficial skin cancers are being treated entirely with PDT
Ideal for patients who prefer not to undergo the more prolonged topical chemotherapeutic regimens.
Inflammatory acne, meaning the pustules, red bumps and cysts (not the whiteheads and blackheads) can show a remarkable response to PDT.
THE SCIENCE
The interaction between the photosensitizing agent and the light treatment activates an oxygen molecule that can destroy nearby cells.
The Blu-U light is ideal for precancerous cells as they are located more superficially in the skin.
The acne process, on the other hand, starts deeper in the follicle and therefore requires a deeper penetrating red light source.
THE TREATMENT
The procedure requires three steps: application, incubation and light activation.
First the drug is applied to prepped skin in the form of a liquid or a cream. We use both the Kerastick as well as the newer Ameluz product. The drug is allowed to air dry and then incubate from 1 to 3 hours, sometimes overnight, depending on the condition.
The skin is then exposed to the appropriate light source. The patient generally feels an intense tingling or heat. The use of a small fan increases the patient’s comfort.
In some cases, even daylight may be used as a light source.
The treated areas are usually light sensitive for the next 48 hours.
Depending on the severity of the condition, more than one session may be required.
