Abstract
Abstract An evaluation of anesthetic waste gas exposures was conducted in small private practice animal clinics throughout the Salt Lake Valley. The two most frequently used anesthetic gases, methoxyflurane and halothane, were chosen to be studied. Exposures during 38 surgeries were studied in a total of 10 facilities involving 13 veterinarians. Veterinarian breathing zones were sampled on a real-time basis with a Wilks Miran infrared analyzer. Several back-to-back surgeries were also monitored to determine the potential for gas build-up in the operating rooms. The monitoring results indicated that veterinarians have a significant exposure to anesthetic gases. Time-weighted averages over the anesthetic administration period ranged from 0.07 to 2.99 ppm for methoxyflurane and from 0.08 to 9.19 ppm for halothane. A low pressure leak test was performed on each piece of anesthesia equipment. Of the 20 machines checked, 55 percent did not meet the NIOSH recommendations concerning maximum leakage of 100 ml/min ...
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