CLT Laser Modalities & Applications

Question 1

Which laser type is most commonly used for hair removal treatments?

Accepted Answer

Diode laser

Answer

Diode lasers, typically operating at wavelengths around 800-810 nm, are widely recognized as the most common and effective laser type for hair removal. Their wavelength is optimally absorbed by melanin in the hair follicle, leading to efficient destruction of the follicle while minimizing epidermal damage.

Question 2

What is a primary application of the Nd:YAG laser in dermatology?

Accepted Answer

Vascular lesion treatment

Answer

The Nd:YAG laser, particularly its 1064 nm wavelength, is highly effective for treating vascular lesions. This wavelength penetrates deeply and is well-absorbed by hemoglobin in blood vessels, making it ideal for conditions like spider veins, telangiectasias, and other vascular concerns, especially in darker skin types.

Question 3

Which laser type is best suited for skin resurfacing procedures?

Accepted Answer

CO2 laser

Answer

CO2 lasers are ablative lasers that emit light strongly absorbed by water in the skin, allowing for precise vaporization of skin layers. This makes them the gold standard for skin resurfacing procedures, effectively treating wrinkles, scars, and sun damage by stimulating collagen production and promoting new skin growth.

Question 4

Which of the following is a non-ablative laser treatment?

Accepted Answer

Intense Pulsed Light (IPL)

Answer

Intense Pulsed Light (IPL) is a non-ablative treatment because it uses broad-spectrum light to heat target chromophores in the skin without vaporizing the epidermal tissue. This allows for treatment of various conditions like pigmentation and vascular lesions with minimal downtime, unlike ablative lasers which remove skin layers.

Question 5

Which laser is commonly used for removing pigmented lesions and tattoos?

Accepted Answer

Q-switched laser

Answer

Q-switched lasers deliver extremely short, high-energy pulses that create a photoacoustic effect, shattering pigment particles (like tattoo ink or melanin in lesions) into smaller fragments. These fragments are then naturally cleared by the body, making Q-switched lasers highly effective for tattoo and pigmented lesion removal.

(CLT) Certified Laser Technician Practice Test

(CLT) Certified Laser Technician Practice Test

CLT Laser Modalities & Applications