THE ROLE OF POWER IN DOSING
POWER IMPACTS THE FUNCTIONAL DEPTH OF PENETRATION OF THE LASER LIGHT
The combination of treatment time and power determines the therapeutic dose of energy that is received by tissues at depth. If a therapy laser has low power, the total number of Joules it can deliver to relevant depths for treating most musculoskeletal conditions in a realistic treatment time is very low.
When treating with a laser, it can be difficult to maintain therapeutic dosing levels when treating over large surface areas. This is because as the treatment area grows, so does the denominator of the energy density equation (J/cm2) which can dilute the dose of energy being applied if higher joule levels are not applied proportionately. Having more laser power to utilize makes this adjustment easier for the clinician. Note: (J = W x s).
The graphic below helps clarify how adding power impacts treatment time for a given energy density and a given area.
In summary, adding power to the energy equation can significantly reduce the time needed to apply a therapeutic PBM dose of light. Understand the difference between class IV laser therapy and other therapy devices before you invest.
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