CLT Vascular & Pigmented Lesion Treatment 2

Question 1

Which chromophore is the primary target when treating port wine stains with pulsed dye laser?

Accepted Answer

Oxyhemoglobin

Answer

Melanin

Answer

Water

Answer

Collagen

Question 2

A patient with Fitzpatrick skin type IV presents for treatment of solar lentigines. Which approach best minimizes dyspigmentation risk?

Accepted Answer

Use a Q-switched Nd:YAG at 1064 nm with conservative settings

Answer

Use maximum fluence with a single pass

Answer

Use intense pulsed light at high energy

Answer

Apply alexandrite laser at standard fluence

Question 3

What is the term for the thermal relaxation time of a target chromophore?

Accepted Answer

The time required for the target to cool to half its peak temperature

Answer

The time light takes to reach the target

Answer

The pulse duration needed to destroy the target

Answer

The interval between laser pulses

Question 4

During treatment of telangiectasias on the nose, the patient reports immediate darkening of the vessel followed by disappearance. This response indicates:

Accepted Answer

Successful photothermocoagulation of the vessel

Answer

Insufficient fluence was delivered

Answer

Epidermal damage has occurred

Answer

Laser-induced purpura requiring retreatment

Question 5

Which wavelength is most selective for superficial dermal melanin pigmentation in seborrheic keratoses?

Accepted Answer

532 nm

Answer

1064 nm

Answer

810 nm

Answer

1320 nm

Question 6

A purpuric response after pulsed dye laser treatment of a hemangioma is considered:

Accepted Answer

An expected clinical endpoint at appropriate fluences

Answer

A complication requiring immediate intervention

Answer

Evidence of epidermal necrosis

Answer

A sign of insufficient energy delivery

Question 7

When treating café-au-lait macules, which factor most predicts a poor response to laser treatment?

Accepted Answer

Presence of giant melanosomes histologically

Answer

Lesion location on the trunk

Answer

Patient age under 30

Answer

Lesion diameter over 5 cm