Laser Equipment Operation & Care Flashcards
7 cards from real CLT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Laser Equipment Operation & Care flashcards as text
What is the primary reason therapeutic laser devices require periodic recalibration?
Answer: Diode output naturally degrades with operating hours, causing power drift
Laser diodes experience gradual output degradation (aging) with accumulated operating hours, causing the actual power to drift from the displayed setting.
A CLT observes that the treatment area feels excessively hot during a session at standard settings. This could indicate:
Answer: A calibration error causing actual output to exceed the displayed power
Unexpectedly high tissue heating at standard settings may signal that actual output power exceeds the calibrated display value, requiring immediate power verification.
Which IEC standard governs the safety classification of medical laser products?
Answer: IEC 60601-2-22
IEC 60601-2-22 is the specific standard for the safety of therapeutic and diagnostic laser equipment used in medical settings.
What effect does increasing the distance between a non-contact laser handpiece and the skin surface have on power density?
Answer: Power density decreases because beam divergence spreads energy over a larger area
As distance increases beyond the focal point, beam divergence enlarges the spot area, reducing power density (irradiance) even though total power is unchanged.
The nominal ocular hazard distance (NOHD) for a therapeutic laser is the distance at which:
Answer: Unprotected eye exposure would reduce to a safe level below the MPE
NOHD is the distance from the beam source at which the irradiance falls to the maximum permissible exposure (MPE) level for the eye, defining the safe zone boundary.
A therapeutic laser's treatment log shows 500 hours of operation. What maintenance item should the CLT prioritize reviewing at this milestone?
Answer: Diode output power verification against original factory calibration
At accumulated hour milestones, verifying diode output against factory specifications identifies aging-related power drift before it compromises treatment efficacy or safety.
Which of the following contaminants poses the greatest risk to a therapeutic laser's focusing optics?
Answer: Fingerprint oils from direct contact
Fingerprint oils leave ionic residue that can absorb laser energy, causing thermal damage and permanent etching of optical coatings.