Abstract
Abstract Blood-containing aerosols generated during eight total hip replacement procedures conducted on dogs at Colorado State University Veterinary Teaching Hospital were characterized. Aerosol hemoglobin mass, mass concentration, and particle size distribution were examined. Hemoglobin was collected with a membrane filter cassette and a high flow air pump (15 L/min) and the concentration was estimated with Hemastix reagent strips. The mean hemoglobin aerosol mass was 133 ng [standard deviation (SD) = 105 ng] and the range was from 65 to 372 ng. Particle size distribution was determined through use of a laser aerosol spectrometer. The mean count median diameter was 0.18 μm and the geometric standard deviations were from 1.03 to 1.56 μm. The mass median diameter was 0.89 μm and the mean number of particles was 5.45 × 108 particles/m3 (SD = 3.54 × 108 particles/m3). The highest aerosol hemoglobin mass (372 ng) generated exposed the surgeon to about 0.0018 μL of aerosolized blood. If the surgery were conduc...
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