CLT Skin Rejuvenation & Resurfacing 4

Question 1

Post-inflammatory hyperpigmentation (PIH) following laser resurfacing is best managed initially with:

Accepted Answer

Strict sun avoidance and broad-spectrum SPF 30+ sunscreen

Answer

Sun avoidance and SPF protection are the first-line interventions because UV exposure significantly worsens PIH after resurfacing.

Question 2

A laser resurfacing patient develops milia (small white cysts) during healing. These are most likely caused by:

Accepted Answer

Occlusive wound care products trapping keratin

Answer

Occlusive emollients and ointments used post-resurfacing can trap keratin and sebum, leading to milia formation in healing skin.

Question 3

When comparing CO2 laser to Er:YAG for full-face resurfacing, which statement is most accurate?

Accepted Answer

CO2 produces greater hemostasis and collagen tightening but longer downtime

Answer

CO2's higher thermal effect provides better coagulation and collagen contraction but results in significantly more downtime than Er:YAG.

Question 4

The 'rule of 30' in laser resurfacing refers to the principle that treatment depths exceeding approximately 30% of the dermis:

Accepted Answer

Risk delayed healing and scarring

Answer

Resurfacing deeper than the superficial 30% of dermis significantly increases the risk of scarring due to destruction of adnexal structures needed for re-epithelialization.

Question 5

Which test spot strategy is recommended when treating an unknown or reactive skin type with ablative lasers?

Accepted Answer

Treat a small inconspicuous area and evaluate healing at 4–6 weeks

Answer

A test spot in a hidden area allows the clinician to assess individual healing response, pigmentation reaction, and risk before full treatment.

(CLT) Certified Laser Technician Practice Test

(CLT) Certified Laser Technician Practice Test

CLT Skin Rejuvenation & Resurfacing 4