What does LASER mean?
LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION
What are the two types of laser intensity and their diff.
high intensity -> used in medicine
low intensity non-thermal-> for physical therapist
What are the properties of LASER and their characteristics?
Monochromaticity (wavelengths are the same)
Coherence (peaks and troughs are aligned)
Collimation - consequence of spatial coherence, lasers remain in parallel beam.
Two types of coherence and their definition, and diff
Spatial - electric and magnetic field travels in the same direction
Temporal - the peak and trough of electric and magnetic fields all occur at the same time.
Explain the principles of LASER
If an atom is triggered to move, the electron will reach a heightened state then it will eventually decay. Once decayed, photons are now aligned in a reflecting chamber.
What are the effects of LASER?
When interacted with matter, it can — reflect, refract, absorb, scatter
Tissue response
What are the parts of your tissue responsse
Elevation of tissue temp.
Dehydration of tissue
Coagulation of protein
Thermolysis
Evaporation
Explain the biophysical effects of Laser
Tissue healing
In wound, burn the sides of wound,contract the tissues and hence closing the area
In cell count increases the number of fibroblasts. Fibroblasts - form connective tissues. They are the ones responsible for secretion of collagen.
Pain Modulation
Increase of serotonin levels, pain decreases. Serotonin helps in pain modulation.
first discovered
wavelength: 694.3 nm
Ruby Laser
wavelength: 632.8 nm
depth of penetration - 10-15 cm
the most ideal lasing medium
Helium-Neon Laser
wavelength: 910 nm
depth of penetration - 5 cm
Gallium Arsenide
two electrodes stimulated emission of radiation that leads to amplification of light.
Diode Laser
Give 2 indications of LASER
tissue healing
Pain Management
Back, head, and neck dysfunction
Arthritis
Soft tissue injuries
Give 2 contraindications of LASER
Eyes
Pregnancy
Photosensitive Area
Open Fontanelle
Give some precautions of LASER
of extreme age
under heavy medication
Having considerable scar tissue
having extremely dry skin
having active infection
In wound healing,how many seconds? And is the probe in contact?
90 sec./ sq. Cm.
Not in contact with
In pain control how many seconds and is the probe in contact?
5-30 seconds, in contact
What are the 2 modes of LASER and their diff.?
Continuous Beam: for acute pain and fresh wounds
Pulsed Beam: it has been found to be more effective with chronic pain and long-standing open wounds.
