PMU Pigment Removal Techniques 1 — Questions and Answers
Question 1: What mechanism does saline solution use to remove PMU pigment from the skin?
- Chemical breakdown of pigment molecules
- Osmosis to draw pigment particles to the skin surface (Correct answer)
- Laser light absorption to shatter pigment
- Enzymatic digestion of pigment particles
Correct answer: Osmosis to draw pigment particles to the skin surface
Saline removal uses osmosis — the hypertonic saline solution creates a concentration gradient that draws pigment particles upward to the skin surface where they are expelled during healing.
Question 2: Which laser type is most commonly used for removing dark (black or dark blue) PMU pigments?
- CO2 laser
- Alexandrite laser
- Q-switched Nd:YAG laser (Correct answer)
- Pulsed dye laser
Correct answer: Q-switched Nd:YAG laser
The Q-switched Nd:YAG laser is the most widely used laser for PMU removal because its energy is selectively absorbed by dark pigment particles, shattering them for the body to clear.
Question 3: What is 'emergency removal' in the context of PMU procedures?
- Removal performed only in a medical emergency room setting
- Immediate removal attempted within 48 hours of the original PMU procedure (Correct answer)
- Removal using hospital-grade chemical agents
- Removal performed exclusively by licensed physicians
Correct answer: Immediate removal attempted within 48 hours of the original PMU procedure
Emergency removal refers to attempting to remove or significantly lighten fresh PMU pigment within 48 hours of application, when the pigment is still relatively superficial and the skin has not fully sealed.
Question 4: Which of the following is a contraindication for laser PMU removal?
- Having fair skin (Fitzpatrick I)
- Being over 30 years of age
- Active keloid scarring or a documented tendency to form keloids (Correct answer)
- Having previously undergone saline removal
Correct answer: Active keloid scarring or a documented tendency to form keloids
Active keloid scarring or a history of keloid formation is a contraindication for laser removal because the thermal trauma from the laser can stimulate further keloid development.
Question 5: What is 'paradoxical darkening' in the context of laser PMU removal?
- When the skin around the pigment lightens, making the pigment appear relatively darker
- When pigment temporarily appears lighter before fading
- When certain pigments containing iron oxides oxidize and turn darker upon laser exposure (Correct answer)
- When healed pigment photographs darker than it appears in person
Correct answer: When certain pigments containing iron oxides oxidize and turn darker upon laser exposure
Paradoxical darkening occurs when pigments containing iron oxides — such as white, flesh-tone, or pink — oxidize upon laser exposure, causing them to turn a darker shade rather than lighten.
Question 6: How many saline removal sessions are typically required to fully remove PMU pigment?
- 1–2 sessions
- 3–5 sessions
- 6–10 or more sessions (Correct answer)
- A single 4-hour continuous session
Correct answer: 6–10 or more sessions
Full PMU removal with saline typically requires 6–10 or more sessions, depending on pigment density, implantation depth, and individual skin healing response.
Question 7: What is the recommended minimum waiting period between saline removal sessions?
- 3–5 days
- 1–2 weeks
- 6–8 weeks (Correct answer)
- 6 months
Correct answer: 6–8 weeks
A minimum of 6–8 weeks between saline removal sessions is required to allow the skin to fully heal and complete its regenerative cycle, preventing excessive trauma and scarring.
PMU Pigment Removal Techniques 1
What mechanism does saline solution use to remove PMU pigment from the skin?