Physics & Light
This property describes laser light being one specific wavelength.
What is monochromatic?
Primary chromophores that absorb laser energy.
What are hemoglobin and melanin?
The total energy delivered is measured in this unit.
What is J/cm2?
What is grid technique?
This is the main type of energy used in low-level laser therapy.
What is light (photons/electromagnetic energy)?
This property refers to laser light waves traveling in phase.
What is coherent?
First law stating light must be absorbed to have effect.
What is the first law of photobiology?
Formula used to calculate energy density.
What is Power x Time/ Area?
What is scanning technique?
Type of tissue that often shows no response to LLLT.
What is healthy tissue?
Relationship between wavelength and frequency.
Main mechanism of low light laser therapy.
What is photochemical/photomechanical effect?
This parameter determines how fast energy is delivered.
What is power (watts or mW)?
Joint position recommended during treatment.
What is open-packed position?
Laser vs control in tendinopathy studies shows this result.
What is no significant difference?
This determines how deeply laser light penetrates tissue.
What is wavelength (and tissue absorption characteristics)?
Cellular energy molecule increased by low light laser therapy.
What is ATP?
Calculate 2 J/cm2 = (1 W x t) / 2 cm2. t = ?
What is 4 seconds?
Pulse frequency used for tissue healing.
What is 1-20 pps?
This type of bias may occur when patients report improvement simply from receiving a treatment like LLLT.
What is the placebo effect?
Wavelength range for therapeutic lasers in the U.S.
What is 650-1200nm?
Mechanism of pain reduction via nerve activity.
What is decreased nerve conduction velocity?
What is decreased penetration?
Pulse frequency used for pain treatment.
What is >20 pps?
What is inability to compare or generalize results?