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Use Of Lasers In Dermatology
M. Boord
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What are the applications for the laser in veterinary dermatology?
The focus in this lecture will be the use of the CO2 laser and my personal experiences and cases. The laser can be used for almost any procedure for which typical cold steel surgery is used. However where it comes in most useful is when a patient has multiple small lesions, lesions in highly vascular areas, or to remove proliferative tissues to promote healing.
The differences between the CO2 laser and diode surgical laser.
The CO2 laser has a long wavelength. Therefore it must be delivered by an articulated arm or a mirrored flexible hollow wave guide. This long wavelength is a great benefit in that the CO2 laser is an ablative laser and does NOT penetrate tissue deeply. Because this wavelength is absorbed by water the disadvantage to the CO2 laser compared to the diode is that it cannot be delivered through water.
The surgical diode lasers are typically in the wavelengths of 810 to 980nm. These wavelengths are absorbed by hemoglobin, oxyhemoglobin and melanin. The biggest draw back to the diode laser in the author’s view is the deeper penetration into the tissue. This is especially concerning in the ear. The 980nm wavelength does absorb water better than 810nm so may be better for soft tissue surgery. The diode wavelength is not visible to the human eye and an aiming beam needs to be used. This makes visualization of fine dissection ...
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