CLT Laser Treatment Parameters & Dosage 3

Question 1

Which chromophore is the PRIMARY target for 1064 nm Nd:YAG laser treatments?

Accepted Answer

Deep dermal melanin and tattoo pigment

Answer

The 1064 nm wavelength penetrates deeply and is selectively absorbed by deep dermal melanin and exogenous pigments such as tattoo ink, with less melanin competition than shorter wavelengths.

Question 2

A patient with a pacemaker presents for low-level laser therapy over the chest area. The MOST appropriate action is to:

Accepted Answer

Avoid treatment over and near the pacemaker site

Answer

Laser therapy near implanted electronic devices such as pacemakers is contraindicated due to potential electromagnetic interference that could disrupt device function.

Question 3

Increasing the repetition rate of a pulsed laser from 2 Hz to 10 Hz while maintaining the same pulse energy will:

Accepted Answer

Increase average power but not change peak power

Answer

Average power = pulse energy × repetition rate, so more pulses per second raises average power; peak power per pulse remains determined by pulse energy and duration.

Question 4

The phenomenon of 'selective photothermolysis' requires that the wavelength used is:

Accepted Answer

Preferentially absorbed by the target chromophore over surrounding tissues

Answer

Selective photothermolysis relies on a wavelength that is preferentially absorbed by the intended target (chromophore) while minimally absorbed by surrounding structures.

Question 5

Which of the following BEST describes the role of contact cooling during laser hair removal?

Accepted Answer

It protects the epidermis from thermal damage while the target follicle is heated

Answer

Contact cooling removes heat from the epidermis before, during, or after a laser pulse, protecting it while the deeper follicle, with a longer TRT, remains heated.

(CLT) Certified Laser Therapist Practice Test

(CLT) Certified Laser Therapist Practice Test

CLT Laser Treatment Parameters & Dosage 3