Vascular & Pigmented Lesion Treatment Flashcards
7 cards from real CLT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Vascular & Pigmented Lesion Treatment flashcards as text
Which laser system is FDA-cleared and most commonly used for treating spider veins (leg telangiectasias) on fair-skinned patients?
Answer: Nd:YAG laser at 1064 nm
The long-pulsed Nd:YAG at 1064 nm penetrates deeply enough to reach leg telangiectasias and is effective on fair skin with lower epidermal melanin absorption.
Post-inflammatory hyperpigmentation (PIH) after pigmented lesion treatment is best prevented by:
Answer: Pre-treating with topical hydroquinone and sun avoidance
Pre-treatment with hydroquinone to suppress melanocyte activity and strict sun avoidance before and after treatment significantly reduces PIH risk.
The principle of selective photothermolysis requires that pulse duration be:
Answer: Equal to or shorter than the thermal relaxation time of the target
For selective photothermolysis, pulse duration must be less than or equal to the TRT of the target to confine thermal damage to the intended chromophore.
Which condition is an absolute contraindication to laser treatment of vascular lesions?
Answer: Active cutaneous infection or open wound at the treatment site
Active infection or open wounds at or near the treatment site are absolute contraindications due to risk of spreading infection and compromised healing.
A patient develops milia 4 weeks after laser treatment of a vascular birthmark. The most likely cause is:
Answer: Occlusion of hair follicles during wound healing
Milia form when keratin becomes trapped in occluded follicular infundibula during post-laser re-epithelialization and wound healing.
When treating a nevus of Ota, which laser modality provides the most effective removal with lowest risk of scarring?
Answer: Q-switched Nd:YAG at 1064 nm
The Q-switched Nd:YAG at 1064 nm is the gold standard for nevus of Ota because it targets deep dermal melanocytes with nanosecond pulses that minimize thermal damage.
Dynamic cooling devices (DCD) used with pulsed dye laser primarily protect which skin structure?
Answer: The epidermis
DCD sprays a cryogen burst milliseconds before the laser pulse, cooling the epidermis to prevent surface damage while allowing energy to reach the target vessel.