CLS Vascular Lesion Treatment 1

Question 1

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

Accepted Answer

Oxyhemoglobin

Answer

Oxyhemoglobin in red blood cells selectively absorbs laser energy, causing thermal destruction of the target blood vessel while sparing surrounding tissue.

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

The PDL was originally developed at 585 nm, which closely matches the 577 nm oxyhemoglobin absorption peak, making it highly selective for vascular lesions.

Question 3

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

Accepted Answer

Purpura (bruising)

Answer

Purpura is the expected and desired endpoint after PDL treatment, indicating sufficient intravascular coagulation from selective photothermolysis.

Question 4

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

Accepted Answer

Pulsed Dye Laser (PDL)

Answer

The pulsed dye laser is the gold standard for port wine stains because its wavelength selectively targets oxyhemoglobin with minimal epidermal collateral damage.

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

Pulse duration must equal or be shorter than the vessel's thermal relaxation time to confine heat within the vessel and prevent damage to surrounding tissue.

CLS - Certified Laser Specialist Practice Test

CLS - Certified Laser Specialist Practice Test

CLS Vascular Lesion Treatment 1