Skin Anatomy & Treatment Selection Flashcards

Which skin layer contains the majority of collagen and elastin fibers responsible for skin firmness?

Answer: Dermis

The dermis contains the bulk of collagen and elastin fibers that provide structural support and elasticity to the skin.

A patient presents with Fitzpatrick Skin Type V. Which laser parameter adjustment is most appropriate to reduce risk of post-inflammatory hyperpigmentation?

Answer: Lower fluence and use longer wavelengths

Lower fluence combined with longer wavelengths (which penetrate deeper with less epidermal absorption) reduces PIH risk in darker skin types.

The Langerhans cells found in the epidermis serve primarily which function?

Answer: Immune surveillance and antigen presentation

Langerhans cells are dendritic immune cells in the epidermis that detect and present antigens to initiate immune responses.

Which chromophore is the primary target when using a 1064 nm Nd:YAG laser for hair removal on darker skin types?

Answer: Melanin

Melanin in the hair follicle is the primary chromophore targeted by the 1064 nm wavelength for hair removal.

Actinic keratoses are considered precancerous lesions arising primarily from which skin layer?

Answer: Epidermis

Actinic keratoses originate in the epidermis due to cumulative UV-induced DNA damage to keratinocytes.

When performing laser treatment near the orbital rim, which safety protocol is absolutely mandatory?

Answer: Using internal metal eye shields for the patient

Internal metal eye shields must be inserted directly on the cornea to protect the globe when lasering near the orbital area.

The stratum granulosum is characterized by the presence of which cellular feature?

Answer: Keratohyalin granules

Keratohyalin granules in the stratum granulosum contribute to the cornification process and formation of the skin barrier.