Laser Generated Air Contaminants

Most compounds detected in the thermal desorption air samples were also detected in the bulk sample and the residue was acidic ph 3.

Laser generated air contaminants.

Nonetheless when biological tissue is subjected to laser radiation the target cells can be vaporized resulting in the aerosolization of their contents and the subsequent exposure of health care workers to laser generated air contaminants lgacs. Plume and airborne contaminants pac. Plumes may also contain bioaerosols viruses blood fragments and bacteria depending on the type of the procedure. Laser fumes according to carnegie mellon university laser beams are hazardous during the cutting or engraving process because laser generated air contaminants are released.

Harmful emissions are typically associated with class 3b or 4 lasers. Fused silica from cutting quartz. Analysis of the plume produced has shown the presence of gaseous toxic compounds bio aerosols dead and live cellular material and viruses. Characteristics of the contaminants depend upon the target material cover gas and beam irradiance.

Laser generated air contaminants polycyclic aromatic hydrocarbons from mode burns on poly methyl methacrylate type polymers. Hydrogen cyanide and benzene from cutting of aromatic polyamide fibers. Benzene from cutting polyvinyl chloride. Technologists are exposed to laser generated air contaminants lgacs orelectrosurgicalsmoke 1 thelasersurgicalsmoke or plume is generated as the result of target cells being heated to the point of boiling causing the membranes to rupture as well as pyrolysis and combustion of the target material 2.

Particles 0 3um in diameter umd generated during the laser cutting exceeded background particle levels by a factor of ten or more. Laser generated airborne contaminants can form during disruption of tissue cells by heat lasers electrosurgical generators mechanical manipulation rotary devices saws or ultrasonic instruments. Heavy metals from etching. Ansi z136 3 7 4 laser generated airborne contaminants lgac.

Laser generated air contaminants lgacs when the beam irradiance exceeds 1 000 w cm2 an evaluation shall be performed by an industrial hygienist to identify engineering controls for laser generated air contaminants. Places where irradiances exceed 10 000 w cm2 shall be enclosed to the maximum extent practical and be properly ventilated. Laser generated air contaminants lgacs may be generated when certain class 3b and class 4 lasers beams interact with matter.