Yttrium aluminium garnet, YAG

A 30-year-old man, a cocaine sniffer, who had used cocaine more than five times a month for 4 years, complained of shortness of breath and acute chest pain. He had episodic cough and bloody sputum. A chest X-ray showed an 80% pneumothorax on the left side. On thoracoscopy the entire lung visceral pleura seemed to be covered by fibrinous exudate. After yttrium aluminium garnet (YAG) laser pleurodesis surgery, which abrades the pleura, he made a full recovery within 4 days. 

UV light with a wavelength of 254 nm can be generated with a mercury vapom lamp and the appropriate filters. U V radiation with a wavelength of 350 nm is obtained with an yttrium-aluminium-garnet (YAG) laser. Optional is as well the irradiation with a KrF laser (248 nm), or a nitrogen laser (337 nm). 

J. L. Caslavslqr and D. J. Viechnicki, Melting behaviour and metastability of yttrium aluminium garnet (YAG) and YAIO3 determined by optical differential thermal analysis, J. Mater Sci. 15, 1709-1718 (1980). 

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