Erbium YAG Laser Treatment Machine

What is Erbium YAG laser?

Erbium YAG (Er:YAG) lasers are solid-state lasers whose lasing medium is erbium-doped yttrium aluminum garnet. The triply ionized erbium dopant (a substance added in minute amounts to another pure substance to alter its conductivity) typically replaces a small fraction of the yttrium ions in the host crystal structure, since the two ions are of similar size.

The erbium provides the laser activity in the crystal.

Er:YAG lasers typically emit light with a wavelength of 2940 nm, which is infrared light. Unlike Nd:YAG laser, the output of an Er:YAG laser is strongly absorbed by water. This fact limits the use of Er:YAG laser in surgery, and in many other laser applications, to where water is present (healthy skin has a high water content).

How does erbium YAG laser work?

Lasers work by emitting a wavelength of high energy light, which when focused on a certain skin condition will create heat and destroy diseased cells.

What is erbium YAG laser used for?

The following skin disorders can be treated with Er:YAG laser beams.

• Atrophic acne scars

• Herpes simplex scars, smallpox scars

• Sun damaged skin

• Mild to moderate facial wrinkles

• Uneven pigment (brown age spots, freckles, melasma)

• Seborrhoeic keratosis and other benign skin growth

• Some superficial non-melanoma skin cancers

• Some vascular birthmarks (capillary vascular malformations)

Commonly used erbium YAG laser settings

Typical settings employed for birthmarks, age spots, and superficial skin ablation are wavelength 2940 nm, short pulse, laser output 2.5–5 J/cm2, and pulse duration 250 microseconds.

For relatively deep-seated scars, long pulse settings are preferable, at wavelength 2940 nm, laser output 3 J/cm2, and pulse duration 1000 microseconds.

Patient selection and contraindications

Contraindications

Erbium YAG laser treatment may be unsuitable in the following circumstances:

Unrealistic patient expectations

The tendency toward keloid or hypertrophic scar formation

Reduced numbers of adnexal skin structures (hair follicles, sweat glands), such as in scleroderma, and burn scars

History of prior ionizing radiation to the skin

Precautions

All patients should be carefully examined before treatment.

The eyes must be examined for scleral show (whites of eyes visible below the iris), lid lag (slow movement of eyelids), and ectropion (drooping of the lower eyelid) in patients desiring periorbital laser treatment.

The presence of cutaneous disorders including seborrhoeic keratoses, solar lentigines, actinic keratoses, and skin cancers should be noted.

Skin cancers must be treated adequately by other methods before any resurfacing procedure is performed.

Laser skin resurfacing can lead to reactivation of latent herpes simplex virus infection or predispose the patient to a primary herpes infection before the skin surface has healed.

Little data exist to support the use of prophylactic antibiotics because of the relatively low incidence of bacterial infections reported.