Modalities Ch. 20 Light Therapy Flashcards Preview

Modalities > Modalities Ch. 20 Light Therapy > Flashcards

Flashcards in Modalities Ch. 20 Light Therapy Deck (20)
Loading flashcards...
1

how does laser work

light at specific wavelengths cause specific physiological responses in the body
lasers used as a therapeutic modality in physical medicine have a low power, typically 1 milliwatts (mW)

2

laser effects

photobiomodulation
stimulated tissue repair
decreased pain

3

photobiomodulation

the act of stimulating or inhibiting biological processes with light

4

mechanisms of action for photobiomodulation

excitation of electrical bonds to change molecular structure
excitation of atoms, creating greater movement and generation of heat
rotation of atoms, resulting in the generation of heat

5

stimulated tissue repair

numerous intracellular effects
enhanced ATP synthesis

6

decreased pain

decreased nociceptor response

7

what does the research say

still a "young" modality
not entirely decisive regarding mechanisms of action and effects

8

delivery technique

single vs cluster probe
laser probe should be in contact with the skin throughout the treatment
in cases of open wounds, the probe should be held <1 cm. away from the wound
single probe options
-grid application
-scanning

9

advantage of cluster probe

treat a larger area

10

disadvantage of scanning method

hard to know dosage each treatment area receives

11

wavelength determinant
-infrared

determines how deep the beam penetrates
-infrared lasers have the best penetration, thus achieving deeper absorption which is of great importance in treating muscle and joint pain types

12

tissue penetration and lasers

issue with the therapeutic use of lasers
light does not penetrate deeper than 5 mm into the tissue

13

dosage =

dosage = (average power x treatment time) / treatment area

14

dosage measure

j/cm2

15

average power

power output of the machine (in mW)

16

power output

fixed in the machine
the altered variable is time

17

new formula as a result of altering time

treatment time = (dosage x treatment area) / power

18

current recommended parameters for tissue repair

frequency: 630 nm
wounds: begin with 4 J/cm2; increase if not responding
soft tissue injury: 4-8 J/cm2 up to 3x/day
chronic: up to 30 J/cm2

19

current recommended parameters for pain control

frequency: 830 nm
treat from nerve root to site of pain to trigger points
10-12 J/cm2
trigger points: 10-20 J/cm2

20

other current recommended parameters

lower doses for acute, higher for chronic
lower doses for superficial, higher for deep