Photofacial and Skin Rejuvenation Flashcards

Which skin resurfacing approach is most appropriate for a patient who wants wrinkle improvement but can only tolerate 3–5 days of social downtime?

Answer: Non-ablative fractional laser (e.g., 1550 nm Erbium fiber laser)

Non-ablative fractional lasers (e.g., Fraxel 1550 nm) create deep dermal MTZs without ablating the epidermis. Re-epithelialization is minimal and rapid (24–72 hours), resulting in only mild redness and edema for 3–5 days. Multiple sessions yield progressive improvement with minimal downtime, unlike full ablative approaches.

What is the role of the 'stacking' technique in fractional laser treatments, and why must it be used cautiously?

Answer: Stacking means delivering multiple laser passes over the same area in one session to increase the treatment density; excessive stacking can lead to cumulative thermal injury and scarring

Stacking involves delivering additional laser passes over already-treated skin in the same session. While it can increase treatment density and effect, excessive stacking increases cumulative thermal load beyond what surrounding tissue can safely conduct away, raising the risk of confluent necrosis, prolonged healing, and scarring.

In a photofacial with IPL, which filter setting would most selectively target solar lentigines (brown sunspots) in a Fitzpatrick type II patient while minimizing vascular response?

Answer: 695 nm cut-off filter

A 695 nm cut-off filter removes shorter wavelengths that are strongly absorbed by oxyhemoglobin, reducing vascular response, while passing longer wavelengths still absorbed by melanin. For lighter skin types with pigmented lesions, this filter preferentially targets melanin in lentigines with reduced vascular treatment effect.

What post-treatment instruction is critical for all patients immediately following ablative laser resurfacing?

Answer: Keep treated areas clean and moisturized, avoid sun exposure, and do not pick or remove forming crusts

After ablative resurfacing, the skin barrier is broken and healing skin is vulnerable to infection, trauma, and UV damage. Patients must keep the area clean (gentle saline or wound wash), apply prescribed healing ointments to prevent desiccation, strictly avoid sun exposure, and refrain from picking crusts to prevent scarring.

Which laser system best combines the benefits of non-ablative collagen stimulation with surface epidermal renewal for advanced photoaging?

Answer: Ablative fractional CO₂ laser

Ablative fractional CO₂ combines dermal thermal injury (stimulating robust neocollagenesis) with controlled micro-ablation of the epidermis (improving surface texture and pigmentation) in an array of MTZs. The fractional approach preserves surrounding tissue for rapid healing while delivering greater remodeling benefit than non-ablative systems.

A practitioner notices that a patient's skin shows immediate frosting and prolonged whitening after a single IPL pass. What does this indicate and what action should be taken?

Answer: Frosting indicates excessive thermal damage to the epidermis; stop treatment, cool immediately, and reassess parameters

Epidermal frosting or immediate gray-white discoloration after IPL indicates acute thermal protein denaturation and overheating of the epidermis — a sign of overtreatment. The treatment should be stopped immediately, the area cooled with cool gel or compresses, and parameters significantly reduced before any further treatment.