CLT Laser Modalities & Applications 2

Question 1

Which laser wavelength is most selectively absorbed by oxyhemoglobin, making it ideal for treating vascular lesions?

Accepted Answer

532 nm KTP

Answer

The 532 nm KTP laser targets oxyhemoglobin's absorption peak, making it highly effective for superficial vascular lesions such as telangiectasias.

Question 2

A Fitzpatrick skin type V patient requires laser hair removal. Which device minimizes the risk of post-inflammatory hyperpigmentation?

Accepted Answer

1064 nm Nd:YAG

Answer

The 1064 nm Nd:YAG laser penetrates deeper with less epidermal melanin absorption, making it the safest choice for darker skin types.

Question 3

What is the primary chromophore targeted by the 2940 nm Er:YAG laser?

Accepted Answer

Water

Answer

The 2940 nm wavelength coincides with water's peak absorption, causing precise tissue ablation used in skin resurfacing procedures.

Question 4

Pulsed dye laser (PDL) at 585–595 nm is the gold standard for treating which condition?

Accepted Answer

Port wine stains

Answer

PDL specifically targets oxyhemoglobin in dilated blood vessels, making it the most effective treatment for port wine stain birthmarks.

Question 5

Which laser type uses a solid-state crystal medium doped with neodymium ions to produce its output?

Accepted Answer

Nd:YAG laser

Answer

The Nd:YAG laser uses a neodymium-doped yttrium aluminum garnet crystal as its gain medium, producing 1064 nm radiation.

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