Laser Therapy Flashcards
1
Q
What is LASER?
A
light amplification of stimulated emissions of radiation
-Light indiced photochemical reactions-> radiation energy that behaves like a particle and wave
2
Q
Hot vs. Cold PT Lasers
A
Hot:
high power=thermal effect
used for medicine cutting, coag, and surgery
Cold: Used in PT
Power ,50mW for photochemical effect
used for tissue healing
3
Q
3 Laser Effects on Cells
A
- Nitric oxide bingding to chytochrome C
- prohibits oxygen binding/healing
- laser forces release of nitrous oxide
- oxy can then mind to mitochondria for normal oxidative phosphorylation - Vasodilation
- nitrous oxide in system after release causes vasodilation
- helps dissipate bad byproducts - Reactive oxygenation species
- enhances and stimulates DNA/RNA synthesis
- enhances cell reproduction and healing
4
Q
4 Physiologic Effects of Laser
A
- Edema Reduction
- decrease inflam via decrease prostaglandin synth
- increase vessel diameter
- stimulates vessel motoricity via stim of vascular/lymphatic endothelial cells
- encourages angiogenesis - Decrease infection risk
- increase phagocytosis
- eliminates stagnant tissue - Wound Healing
- stimultes fibroblasts, macrophages, endothelial cells, and lymphocytes
- physiologic stress/pathologic conditions in vivo or vitro
- increase vascularization - Reduce scar adhesions/fibrous scar tissue
- increase epithelization
5
Q
Laser Indications
A
wound healing and tissue repair ulcers, pressure sores, burns, skin grafts bone healing pain soft tissue inflam tendinopathy, bursitis, lig sprains lymphedema
6
Q
Laser Contraindications
A
cancerous tissue eyes thyroid glands photosensitivity pregnancy hemmoragining lesions
Precautions:
venous thrombosis history
chronic pain patients
7
Q
FDA Clearance for Infared Light with these goals:
A
increase circulation relieve muscle/joint aches pain and stiffness relax muscles muscle spasms arthritis pain/stiffness
8
Q
Laser Paramters
A
Depth: up to 5 cm Laser; SLD up to 2.5 cm; LED 0.5cm
Energy Density: (J/cm2)
determined by power, exposure time, and beam aperature area
-Low ranges best benefit
