Vascular Lesion Treatment Flashcards
7 cards from real CLS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Vascular Lesion Treatment flashcards as text
The KTP laser at 532 nm targets which absorption band of oxyhemoglobin?
Answer: Q-band at ~542 nm
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.
Which of the following is a key contraindication specific to laser treatment of leg telangiectasias?
Answer: Untreated venous insufficiency with elevated venous pressure
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.
How does vessel diameter affect the selection of appropriate pulse duration in vascular laser treatment?
Answer: Larger vessels require longer pulse durations due to their longer thermal relaxation times
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.
Rosacea with prominent telangiectasias is best characterized clinically by:
Answer: Chronic facial erythema, flushing, and dilated superficial facial vessels
Rosacea presents with chronic central facial erythema, episodic flushing, and telangiectasias, making vascular lasers a primary treatment modality for the vascular component.
Which laser parameter most significantly determines the depth of penetration for treating deep vascular lesions?
Answer: Wavelength
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.
Spider nevi (spider telangiectasias) presenting in adult patients are most commonly associated with:
Answer: Liver disease and elevated circulating estrogen levels
Spider nevi in adults are strongly associated with liver disease (impaired estrogen catabolism) and hyperestrogenic states such as pregnancy, as elevated estrogen promotes vascular dilation and spider nevi formation.
What is the recommended minimum interval between PDL treatment sessions for port wine stains to allow adequate tissue recovery?
Answer: 6–8 weeks or longer
Port wine stain PDL treatments are typically spaced 6–8 weeks or more apart to allow complete resolution of purpura, full tissue healing, and accurate assessment of treatment response before the next session.