Erbium yag laser

Author: Prof. Dr. med. Peter Altmeyer

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Last updated on: 29.10.2020

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Er-YAG laser; Er:YAG laser

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Pulsed solid state laser with a wavelength of 2940 nm.

General definition
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The emitted light of a wavelength in the mid-infrared range is almost exclusively absorbed by water, i.e. the penetration depth in the tissue is relatively small (epidermis, upper parts of the corium). Due to the extreme power densities, tissue can be ablated extremely precisely without significant damage to the surrounding area ("cold ablation" of the skin). Ablation is more precise than withCO2 laser, mechanical dermabrasion methods (milling cutter) or cauterization ("spherical cautery"). A disadvantage is the incipient bleeding when the capillary vessels are opened.

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Versatile use (good "entry laser" for a practice) for indications such as actinic and seborrhoeic keratoses, milia, xanthelasma, epidermal nevi, syringomas, verrucae, acne scars, up to lentigines. Also suitable for the indication "skin resurfacing".

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Standard: Laser with 8 J/cm2, 10 Hz. Spot: 3 mm. Surface anaesthesia with local anaesthetics such as EMLA cream or cooling are favourable, possibly infiltration anaesthesia. Depending on the indication, a different handpiece for spot modification, or image pattern generator (CPG) for pattern modification. Wound healing over 1 week, followed by light protection (sunscreen) over 6-8 weeks, see below sunscreen.

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Before the medical use of ablative laser systems, a histological diagnosis of the lesion to be ablated should be confirmed.


Last updated on: 29.10.2020