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

The 532 nm KTP laser falls near the 542 nm Q-band (beta band) absorption peak of oxyhemoglobin, providing selective targeting of superficial vascular structures.

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

Untreated venous insufficiency creates elevated hydrostatic pressure that causes treated telangiectasias to rapidly refill; venous insufficiency must be evaluated and corrected before cosmetic laser vein treatment.

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

Thermal relaxation time is proportional to the square of vessel radius; larger vessels retain heat longer and therefore require longer pulse durations to achieve uniform intravascular coagulation.

Question 4

Rosacea with prominent telangiectasias is best characterized clinically by:

Accepted Answer

Chronic facial erythema, flushing, and dilated superficial facial vessels

Answer

Rosacea presents with chronic central facial erythema, episodic flushing, and telangiectasias, making vascular lasers a primary treatment modality for the vascular component.

Question 5

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

Accepted Answer

Wavelength

Answer

Wavelength is the primary determinant of tissue penetration depth; longer wavelengths (e.g., 1064 nm) scatter and absorb less superficially, allowing deeper penetration than shorter wavelengths.

CLS - Certified Laser Specialist Practice Test

CLS - Certified Laser Specialist Practice Test

CLS Vascular Lesion Treatment 3