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Semester 3 PM Exam 5 > Light Therapy > Flashcards

Light Therapy Flashcards

1
Q

Therapeutic window of light

A

660 nm to 880 nm

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2
Q

Bacetericidial blue light therapeutic wavelengths

A

400 nm

Not used therapeutically

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3
Q

Collagen rebuilding - therapeutic wavelength -

A

580-590 nm

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4
Q

Tissue repair/pain control - therapeutic wavelenth

A

600-1000nm

660-880 nm is more specific though for dynatronics

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5
Q

The longer the wavelength of the light source - (penetration)

A

The deeper the penetration into the tissue

Shorter wavelength = lesser the penetration

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6
Q

Infrared penetrates more

A

visible red (2-4cm)

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7
Q

LASER

A

light amplification of stimulated emissions of radiation

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8
Q

Laser is form of

A

electromagnetic energy

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9
Q

Three unique properties for a laser

A

Coherence
Monochomaticity
Collimation

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10
Q

Coherent light

A

One wavelength and beam is very focused

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11
Q

Noncoherent light

A

Losing some of light energy because of non coherance

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12
Q

Laser vs. LED wavelength

A

Laser = one very specific wavelength

LED light = one peak wavelength but others surrounding the peak as well

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13
Q

Differences with laser and light

A 
Laser = monochromatic (same wavelength 
Light = can be multiple wavelengths
Laser = no divergence of photons
Light = diverges
Laser = coherent 
Light = noncoherent
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14
Q

Laser types

A

High power

Low power –> helium neon and gallium arsenide

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15
Q

Helium neon laser

A

Red beam
Continuous wave
1-2 mm direct penetration
10-15 mm indirect

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16
Q

Gallium Arsenide laser

A

Invisible
Pulse mode
1-2cm direct penetration
5 cm indirect

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17
Q

Lasing technique options

A 
Direct contact (on skin)
Scanning (10-15 cm or so above skin)
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18
Q

Dosage reported as

A

J/cm2 (energy density)

Joule = 1 W/s

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19
Q

Dosage is dependent on the

A

laser output in mW, the time of the exposer in seconds, and the beam surface area of the laser in cm2

20
Q

Energy is measured in

A

Joules or millijoules (mJ)

21
Q

Energy is a function of

A

power and time and a better determinant of the effects of light on tissue

22
Q

Energy =

A

power x time

23
Q

Energy density is measured in

A

HJoules/squared cm

24
Q

Preferred unit for reporting doses of treatment

A

Energy density

25
Q

Dosimetry

A

Therapeutic treatment depends on condition, in PT usually 1-8 J/cm2

26
Q

Important parameters for dosimetry

A 
Power/power density
Energy density 
Wavelength
Duration of treatment
Size of the area being treated
27
Q

Power is measured in

A

watts or milliwatts

28
Q

Power determines what

A

length of treatment

29
Q

Power and treatment time relationship

A

inverse

30
Q

Indications

A 
Pain reduction
Facilitate wound healing
Inc scar tensile strength
Dec inflammation
Bone healing
31
Q

Contraindications

A 
4-6 months post radiation therapy 
Pregnant 
Malignancy 
Over eyes
Over endocrine glands
Over active bleeding
Over epiphyseal plates, gonads, sympathetic ganglia, vagus nerve, chest
32
Q

Safety

A

Low level light not does injury eyes
Protective glasses for laser treatments
Do not look directly into light source

33
Q

Acute conditions

A

Laser density 0.05 to 0.5 J/cm2

34
Q

Subacute or chronic conditions

A

Laser density 0.5 to 3 J/cm2

35
Q

How many treatments for the effecct

A

3-6

36
Q

Pain management - trigger point

A

Probe held perpendicular to target with light contact on skin
Treat distal to proximal
Place joint in open position

37
Q

For superficial use what laser type

A

HeNe

38
Q

For deep use what laser type

A

GaAs

39
Q

Wound care - effects in vitro

A

FIbroblast proliferation
Microphage stimulation
Collagen synthesis
Bactericidal

40
Q

Light technique - wound

A

Gridding (contact) Tip perpendicular to skin
Scanning (no contact)Tip is perpendicular and 5-10 mm from skin
Beam should fill area of 1 cm2

41
Q

Treatment recommendations EBP

A

3x per week
Gridding technique
Continue until re-epithelialization
Minimal research

42
Q

Scar tissue remodeling

A

Hypertrophic scars
Scar pain/edema
Treat peripheray of scar due to dec vascular structure

43
Q

Edema and inflammation

A

Interrupts/inhibits foramtion of kinins, histamines, and prostaglandins
Optimize cell membrane permeability

44
Q

Power density in treatment determines

A

How long a treatment should be and how destructive treatment can be

45
Q

Energy density =

A

power density x time

Semester 3 PM Exam 5 (10 decks)

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