Deck 19: Low-Level Laser Therapy

Question 1

According the Food and Drug Administration's Center for Devices and Radiological Health Laser Classification System,what class of laser has an output that does not exceed 1 mW and may produce visible light?

A) Class 1
B) Class 2a
C) Class 3b
D) Class 4

Answer 1

A

Question 2

Current evidence suggests that the biophysical benefits of laser are related to what?

A) Photomechanical or photothermal effects
B) Photochemical or photothermal effects
C) Photomechanical or photochemical effects
D) Photomechanical,photochemical,and photothermal effects

Answer 2

C

Question 3

In the United States,which of the following laser wavelengths is in the range considered to be therapeutic?

A) 200 nm
B) 500 nm
C) 1000 nm
D) 1500 nm

Answer 3

C

Question 4

Which type of therapeutic laser produces a wavelength of 488 nm and a blue light band?

A) Helium-neon
B) Gallium aluminum arsenide
C) Argon
D) Gallium-arsenide

Question 5

According to the practical evidence,which type of laser is considered to be the most effective for stimulating tissue healing?

A) Helium-neon
B) Gallium aluminum arsenide
C) Argon
D) Gallium-arsenide

Question 6

Which of the following contraindicate the use of therapeutic laser? Select all that apply.

A) Application over rheumatoid arthritis
B) Application over a fracture
C) Application over the thyroid
D) Pain in an unfused epiphyseal plate
E) Application over deep-vein thrombosis

Question 7

The Food and Drug Administration has approved low-level laser therapy for treatment of what conditions? Select all that apply.

A) Carpal tunnel syndrome
B) Musculoskeletal shoulder pain
C) Musculoskeletal neck pain
D) Wound healing
E) Fracture healing

Question 8

Laser is often used to assist in the healing of deep wounds,including surgical incisions and severe burns.

Question 9

Effects of laser therapy that occur from the absorption of photons are termed "indirect effects."

Question 10

Which of the following is considered a primary effect of therapeutic laser treatment?

A) Vasodilation of microvessels
B) Decreased ATP production
C) Decreased collagen production
D) Decreased macrophage activity

Question 11

Laser production requires what essential components? Select all that apply.

A) Amplifying medium
B) Mechanism for exciting medium
C) Reflective mirror
D) Partially reflective mirror
E) Photoelectric crystal

Question 12

Lasers produce highly refined,_________light in the ultraviolet,visible,or infrared range.

A) monochromatic
B) bichromatic
C) trichromatic
D) multichromatic

Question 13

Which statement is true concerning a gallium arsenide (GaAs)laser?

A) GaAs is produced by a semiconductor diode chip.
B) GaAs produces a visible red light.
C) GaAs energy can penetrate tissues up to 5 cm deep.
D) GaAs delivers a light wave at 670 nm.

Question 14

Which laser feature identifies the fact that the beam of the laser does not tend to diverge as it travels through space?

A) Monochromatic
B) Coherent
C) Collimated
D) Divergent

Question 15

What laser wavelength is associated with infrared light?

A) Greater than 780 nm
B) Less than 380 nm
C) 520 nm
D) 670 nm

Question 16

According to the practical evidence,laser with a wavelength of 670 nm has demonstrated effectiveness in the short-term relief of pain associated with lateral epicondylalgia.

Question 17

While the efficacy has not been substantiated,which of the following represent indications for the use of therapeutic laser? Select all that apply.

A) Thrombophlebitis
B) Osteoarthritis
C) Fibromyalgia
D) Fracture healing
E) Pain in an unfused epiphyseal plate

Question 18

In general,low-pulse frequencies are used to promote tissue healing when applying laser therapy.

Question 19

In general,acute conditions are commonly treated with what laser output?

A) Less than 0.5 J/cm²
B) Less than 1 J/cm²
C) Less than 2 J/cm²
D) Less than 3 J/cm²

Question 20

Longer laser wavelengths penetrate deeper into tissues than shorter wavelengths.