Epithelial Damage With Small Scars

Side Effects, Complications of Various Lasers, Light Devices

Epithelial Damage With Small Scars

PostPosted by DCNGA » Sat Oct 08, 2011 9:55 pm

2007 Paper That Discusses Lasers, IPL, VBeam Available at the time:

http://onlinelibrary.wiley.com/doi/10.1 ... 513.x/full

Very interesting..

2.2.3.3 Nd: YAG laser
Quality-switched Nd: YAG lasers (1064 nm) are used with pulses in the nanosecond range mainly for destruction of deep, blue-black tattoos. At the same beam diameter, the depth of penetration at this wavelength is larger than that of the ruby or alexandrite laser. If the frequency is doubled (532 nm), this laser is also suitable for photothermolysis of red dyes and melanin. 1064 nm Nd:YAG laser with pulses in the millisecond range is used for photothermolysis of hair follicles and treatment of vessels (2.2.4.6). Frequency-doubled (532 nm), millisecond-pulsed lasers are used for vascular conditions, but are generally less effective than FPDL and have a higher rate of side effects (pigmentary changes, danger of epithelial damage with small scars)

2.2.1.1 CO2 laser
The CO2 laser (10600 nm, absorption mainly by tissue water) allows vaporization of superficial layers as well as cutting of the skin surface with a focused beam. Tissue ablation is possible at high energy densities using pulsed laser or a scanner system (see 2.2.2.1).

Patient information and side-effect profile: Depends on the indication and type of procedure. Vaporization of deep tissue is associated with scarring and sometimes even keloids. Thermal necrosis in superficial skin layers is advantageous for hemostasis and disadvantageous for wound healing. Long-term erythema, hyperpigmentation, and permanent depigmentation can occur.

2.2.4.6 Pulsed Nd: YAG-Laser
Pulsed Nd: YAG laser (1064 nm) is used for epilation with selective photother-molysis (see “Selective photothermolysis”) as well as semi-selective coagulation of superficial vessels, especially with skin cooling (telangiectases, spider veins, phlebectasia)

Patient information and side effects: Depending on location and irradiation parameters, therapy may be quite painful. Risk of atrophy, small scars, and pigmentary changes as seen in use of argon laser; side effects may be reduced by cooling of the treated area.


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