CDT Phototherapy & Light-Based Treatments Flashcards
6 cards from real CDT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CDT Phototherapy & Light-Based Treatments flashcards as text
What wavelength range is used in narrowband UVB phototherapy?
Answer: UVB at 311–313 nm
Narrowband UVB phototherapy uses the 311–313 nm wavelength range, which is most effective for psoriasis, vitiligo, and atopic dermatitis.
Which condition is narrowband UVB phototherapy most commonly used to treat?
Answer: Psoriasis
Narrowband UVB is most commonly used for psoriasis, and is also effective for vitiligo and atopic dermatitis.
What does PUVA phototherapy combine?
Answer: Psoralen + UVA light
PUVA combines a psoralen photosensitizer (oral or topical) with UVA light exposure to treat psoriasis, vitiligo, and cutaneous T-cell lymphoma.
What is the Minimal Erythema Dose (MED) used to determine in phototherapy?
Answer: Safe starting UV dose for treatment
The MED is the lowest UV dose producing minimal redness at 24 hours, used to calculate a safe and individualized starting phototherapy dose.
Which protective measure is mandatory during and after PUVA therapy?
Answer: UV-protective goggles during and for 24 hours after treatment
UV-protective goggles must be worn during PUVA and for 24 hours after because psoralen sensitizes the eyes to UV-induced damage.
What is excimer laser therapy primarily used for in dermatology?
Answer: Localized psoriasis and vitiligo
The 308 nm excimer laser delivers targeted UVB to treat localized psoriasis and vitiligo without exposing surrounding healthy skin.