CLS Tattoo Removal and Pigmentation Treatment 3

Question 1

What is the Kirby-Desai scale used for in laser tattoo removal practice?

Accepted Answer

Predicting the number of treatments required for significant tattoo clearance based on multiple clinical factors

Answer

The Kirby-Desai scale is a validated clinical tool that estimates the number of laser sessions needed based on six parameters: skin type, location, color, amount of ink, scarring/tissue change, and layering. It helps practitioners set realistic patient expectations and plan treatment courses.

Question 2

When treating a multicolored tattoo, what is the recommended approach for wavelength selection?

Accepted Answer

Sequence treatments starting with lighter colors first, using the appropriate wavelength for each pigment color

Answer

Different ink colors require different laser wavelengths for optimal absorption. Common protocols treat darker inks (black, dark blue) first with 1064 nm, then red with 532 nm, and green/blue with 694 nm or 755 nm in subsequent sessions. Treating lighter colors first in some protocols allows dark ink clearance to improve visibility of remaining colors.

Question 3

After aggressive Q-switched laser treatment of a large tattoo, a patient develops hypopigmentation that persists at 12 months. What is the most appropriate explanation?

Accepted Answer

Excessive thermal damage from overlapping pulses or excessive fluence permanently destroyed melanocytes in the treated dermis

Answer

Persistent hypopigmentation indicates permanent melanocyte destruction, most commonly caused by excessive fluence, overlapping pulses, or treating too soon after the previous session when tissue is not fully healed. Melanocytes are sensitive to thermal and photomechanical injury; when permanently destroyed, the resulting hypopigmentation may be irreversible.

Question 4

A patient has a new dark tattoo placed 2 weeks ago and requests immediate laser removal. What is the most appropriate response?

Accepted Answer

Advise waiting at least 6–8 weeks for complete healing; treating fresh tattoos risks poor wound healing and increased adverse events

Answer

A 2-week-old tattoo is still in the acute healing phase. The epidermis may not be fully healed, and the skin is still inflamed and edematous. Laser treatment during this period significantly increases the risk of blistering, scarring, infection, and suboptimal outcomes. Waiting 6–8 weeks for complete healing is standard practice.

Question 5

Solar lentigines (age spots) and café-au-lait macules are treated with Q-switched lasers. What parameter distinguishes successful treatment of solar lentigines from incomplete response?

Accepted Answer

Immediate frosting limited to the pigmented lesion that spares the surrounding skin

Answer

When treating solar lentigines, the target is selective photothermolysis of melanin within the pigmented lesion. Correct treatment produces frosting or immediate lightening that is confined to the pigmented spot, sparing the surrounding normally pigmented skin. Frosting extending into surrounding skin indicates too much energy and risk of hypopigmentation in uninvolved areas.

CLS - Certified Laser Specialist Practice Test

CLS - Certified Laser Specialist Practice Test

CLS Tattoo Removal and Pigmentation Treatment 3