CLT Vascular & Pigmented Lesion Treatment 3

Question 1

Which laser system is FDA-cleared and most commonly used for treating spider veins (leg telangiectasias) on fair-skinned patients?

Accepted Answer

Nd:YAG laser at 1064 nm

Answer

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.

Question 2

Post-inflammatory hyperpigmentation (PIH) after pigmented lesion treatment is best prevented by:

Accepted Answer

Pre-treating with topical hydroquinone and sun avoidance

Answer

Pre-treatment with hydroquinone to suppress melanocyte activity and strict sun avoidance before and after treatment significantly reduces PIH risk.

Question 3

The principle of selective photothermolysis requires that pulse duration be:

Accepted Answer

Equal to or shorter than the thermal relaxation time of the target

Answer

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.

Question 4

Which condition is an absolute contraindication to laser treatment of vascular lesions?

Accepted Answer

Active cutaneous infection or open wound at the treatment site

Answer

Active infection or open wounds at or near the treatment site are absolute contraindications due to risk of spreading infection and compromised healing.

Question 5

A patient develops milia 4 weeks after laser treatment of a vascular birthmark. The most likely cause is:

Accepted Answer

Occlusion of hair follicles during wound healing

Answer

Milia form when keratin becomes trapped in occluded follicular infundibula during post-laser re-epithelialization and wound healing.

(CLT) Certified Laser Technician Practice Test

(CLT) Certified Laser Technician Practice Test

CLT Vascular & Pigmented Lesion Treatment 3