CLT Laser Safety & Protocols 2 — Questions and Answers
Question 1: Which ANSI standard governs laser safety in the United States for medical and cosmetic laser use?
- ANSI Z136.1
- ANSI Z136.3 (Correct answer)
- ANSI Z87.1
- ANSI Z41.1
Correct answer: ANSI Z136.3
ANSI Z136.3 specifically covers the safe use of lasers in health care facilities, including medical and cosmetic applications.
Question 2: What does the term 'Nominal Hazard Zone' (NHZ) define in laser safety?
- The zone where laser goggles must be worn at all times
- The area within which the beam irradiance exceeds the Maximum Permissible Exposure (Correct answer)
- The distance at which a laser beam becomes safe to view directly
- The area around the laser unit requiring grounding
Correct answer: The area within which the beam irradiance exceeds the Maximum Permissible Exposure
The NHZ is the space within which the level of direct, reflected, or scattered laser radiation exceeds the applicable MPE, requiring protective measures.
Question 3: A client reports increased photosensitivity due to a medication. What is the most appropriate course of action before proceeding with laser hair removal?
- Reduce fluence by 50% and proceed
- Consult with the prescribing physician and reschedule if needed (Correct answer)
- Apply extra cooling and proceed normally
- Switch to IPL instead of laser
Correct answer: Consult with the prescribing physician and reschedule if needed
Photosensitizing medications can increase the risk of burns and adverse reactions, so physician clearance should be obtained before treatment.
Question 4: Which type of fire extinguisher is recommended for use in a laser treatment room?
- Class A water extinguisher
- Class K extinguisher
- CO2 or dry chemical extinguisher (Correct answer)
- Halon extinguisher only
Correct answer: CO2 or dry chemical extinguisher
CO2 or dry chemical extinguishers are appropriate for electrical and laser-related fires and do not damage equipment with water.
Question 5: What is the primary purpose of the Laser Safety Officer (LSO) in a clinical setting?
- To perform all laser treatments personally
- To ensure the facility's lasers are insured and under warranty
- To establish, implement, and enforce laser safety protocols (Correct answer)
- To purchase and maintain all laser equipment
Correct answer: To establish, implement, and enforce laser safety protocols
The LSO is responsible for establishing and enforcing laser safety programs, including training, hazard evaluations, and protocol compliance.
Question 6: At what Fitzpatrick skin type does the risk of post-inflammatory hyperpigmentation (PIH) from laser treatment significantly increase?
- Fitzpatrick Type I
- Fitzpatrick Type II
- Fitzpatrick Type III
- Fitzpatrick Type V-VI (Correct answer)
Correct answer: Fitzpatrick Type V-VI
Darker skin types (V and VI) have more melanin, making them more susceptible to PIH and burns from laser treatments.
Question 7: What does 'duty cycle' refer to in the context of pulsed laser systems?
- The total number of pulses delivered per treatment session
- The ratio of pulse-on time to the total period of the pulse cycle (Correct answer)
- The maintenance schedule recommended by the manufacturer
- The percentage of laser power reserved for cooling
Correct answer: The ratio of pulse-on time to the total period of the pulse cycle
Duty cycle is the fraction of time a pulsed laser is 'on' during one complete pulse cycle, expressed as a percentage.
CLT Laser Safety & Protocols 2
Which ANSI standard governs laser safety in the United States for medical and cosmetic laser use?