CLS Vascular Lesion Treatment 3

Question 1

The KTP laser at 532 nm targets which absorption band of oxyhemoglobin?

Accepted Answer

Q-band at ~542 nm

Answer

Soret band (~418 nm)

Answer

Alpha Q-band at ~577 nm

Answer

Near-infrared plateau at ~900 nm

Question 2

Which of the following is a key contraindication specific to laser treatment of leg telangiectasias?

Accepted Answer

Untreated venous insufficiency with elevated venous pressure

Answer

Recent cosmetic tan from sun exposure

Answer

Patient age greater than 40 years

Answer

Fitzpatrick skin type II with fair complexion

Question 3

How does vessel diameter affect the selection of appropriate pulse duration in vascular laser treatment?

Accepted Answer

Larger vessels require longer pulse durations due to their longer thermal relaxation times

Answer

Larger vessels require shorter pulse durations to prevent excess heat

Answer

Vessel diameter has no clinically significant effect on pulse duration selection

Answer

Smaller vessels always require longer pulse durations regardless of chromophore depth

Question 4

Rosacea with prominent telangiectasias is best characterized clinically by:

Accepted Answer

Chronic facial erythema, flushing, and dilated superficial facial vessels

Answer

Brown macular hyperpigmentation on the cheeks and forehead

Answer

Deep nodular cysts containing sebaceous material and bacteria

Answer

Post-inflammatory scarring from repeated comedonal acne

Question 5

Which laser parameter most significantly determines the depth of penetration for treating deep vascular lesions?

Accepted Answer

Wavelength

Answer

Spot size diameter

Answer

Fluence (energy density in J/cm²)

Answer

Pulse repetition rate

Question 6

Spider nevi (spider telangiectasias) presenting in adult patients are most commonly associated with:

Accepted Answer

Liver disease and elevated circulating estrogen levels

Answer

Hereditary hemorrhagic telangiectasia (Osler-Weber-Rendu syndrome)

Answer

Type 2 diabetes mellitus and peripheral neuropathy

Answer

Primary hypothyroidism and elevated TSH

Question 7

What is the recommended minimum interval between PDL treatment sessions for port wine stains to allow adequate tissue recovery?

Accepted Answer

6–8 weeks or longer

Answer

1–2 weeks

Answer

3–4 weeks

Answer

6 months between sessions