Mettler Electronics Corp.—
Rev.F_07/03/12
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the Laser Sys*Stim 540s ‘on’ pulse length is 100 µs, this has the effect of changing average power
output of the laser. For example at 5000Hz the laser is on for 100 µs and off for 100 µs, thus the
average power is half the average power in Continuous. For 2500Hz the laser is on for 100 µs and off
for 300 µs, thus the average power is a quarter of the continuous mode average power. Adjustment of
Pulse Mode is an effective way to control average power and therefore the treatment dosage.
The pulse frequency of the laser is reported to assist certain treatments. The Laser Sys*Stim 540 has
a selection of nine frequencies, which span the frequency range for most treatments. For cases where
a desired pulse frequency is not supported by the nine selections (for example 700 Hz) select the
closest frequency (i.e. 500 Hz) and select the same energy for the treatment.
5.6
Method of Laser Therapy
To apply Laser Therapy the following steps are recommended:
Inspect the skin and the surface conditions.
Ensure shiny patient jewelry is removed from treatment region.
If required, prepare the surface with an alcohol wipe to clean away anything that may absorb or
scatter the laser radiation.
Ensure treatment will not be performed over shiny surfaces.
Use protective eyewear on self and patient.
Switch on Laser unit and adjust settings.
Point Laser Applicator perpendicular to skin surface.
Activate Laser just before applicator is touching the skin, use blue target illumination to direct
treatment to desired application area and then slowly move applicator toward skin surface for
contact.
Do not slide the applicator across the surface, but gently lift the applicator and move to next
location.
Use laser therapy only on/over the treatment region.
When treatment is complete, ensure Laser is switched off before removing protective eyewear.
Note: Never look into laser beam or laser aperture, or point laser towards eyes.
5.7 Laser
Dosage
The Laser Sys*Stim 540 is designed for use by qualified practitioners. Estimation of dosage and
application of laser therapy will be determined by experience and consultation of the literature on laser
therapy. The goal is to achieve the smallest dosage that will produce the optimum result.
The dosage is determined by the Pulse Mode and Time, which is discussed in section 4.2.
5.8
SLD/LED Cluster vs. Laser Application
The Laser Sys*Stim 540 can accept an 80 mW Laser Applicator or 500 mW SLD/LED Cluster
Applicator. The technical differences between the applicators are:
The SLD/LED cluster has a larger treatment area than the Laser.
The Laser is a coherent light source, where the SLD/LED is not.
The Laser is monochromatic light source, where the SLD/LED has a broader spectrum.
The power density for the Laser is higher than the SLD/LED.
The SLD/LED cluster has two wavelengths (660 nm and 950 nm), the Laser has one (785 nm).
