CLS Vascular Lesion Treatment

Question 1

What is the primary chromophore targeted during laser treatment of vascular lesions?

Accepted Answer

Oxyhemoglobin

Answer

Melanin

Answer

Water

Answer

Collagen

Question 2

Which wavelength is most closely associated with the original pulsed dye laser (PDL) used for vascular lesion treatment?

Accepted Answer

585 nm

Answer

532 nm

Answer

755 nm

Answer

1064 nm

Question 3

What clinical endpoint indicates adequate PDL treatment of a port wine stain?

Accepted Answer

Purpura (bruising)

Answer

Immediate permanent blanching

Answer

Erythema with no other changes

Answer

Blistering and crusting

Question 4

Which laser is considered the gold standard for treating port wine stains?

Accepted Answer

Pulsed Dye Laser (PDL)

Answer

CO2 ablative laser

Answer

Nd:YAG 1064 nm

Answer

Alexandrite 755 nm

Question 5

According to the principle of selective photothermolysis, the pulse duration for vascular lesion treatment should be:

Accepted Answer

Equal to or shorter than the thermal relaxation time of the target vessel

Answer

Always set to the maximum available pulse duration

Answer

Longer than the thermal relaxation time to ensure complete vessel closure

Answer

Determined solely by the patient's Fitzpatrick skin type

Question 6

Which type of vascular lesion is most challenging to treat due to vessel depth and wall thickness?

Accepted Answer

Leg telangiectasias and reticular veins

Answer

Cherry angiomas

Answer

Facial spider nevi

Answer

Superficial facial telangiectasias

Question 7

For selective photothermolysis of vascular lesions, the laser wavelength must:

Accepted Answer

Be preferentially absorbed by oxyhemoglobin over surrounding skin structures

Answer

Be maximally absorbed by dermal water content

Answer

Penetrate to the subcutaneous fat layer

Answer

Match the peak absorption of melanin