Page 119 - Veterinary Laser Therapy in Small Animal Practice

Different flavors (frequencies) for different tissues 105

Table 8.1 Ballpark values for pulse frequencies to “optimally” stimulate healing in a variety of common tissue types.
Relative
Tissue Ballpark value Principal reason
frequency
Bones are made up of tightly packed, dense cells,
with low relative water content, all of which leads to
Bone Low <500 Hz
a slower dissipation of heat and therefore a longer
time needed between pulses for an optimal response.
The density and spacing of these cells fall
Connective tissue (tendons, Medium 500–2000 Hz somewhere between bone and muscle; they are
ligaments) often surrounded by sheaths that are even more
dense.
Muscles are made of more water-rich cells that can
dissipate heat faster, and therefore resonate with
Muscle High 2000–10,000 Hz
pulses of shorter down-time, meaning you can use
more pulses per second (Hz).
Dermis is very porous and well suited to “ventilating”
itself to dissipate heat. Also, conditions of the dermis
often involve bacteria, which are smaller and less
Dermis Very high >10,000 Hz
dense than our cells, thereby dissipating heat even
faster. By whichever antimicrobial mechanism, this
higher frequency may be the best flavor.

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