Biological disposition of perfluoroctylbromide: tracheal administration in alveolography and bronchography

Perfluoroctylbromide, given tracheally either as neat liquid in alveolography or as 10:1 emulsion in bronchography, was cleared roentgenologically from the lungs within 24 hours. Quantitative analysis was performed on a gas chromatograph. The rats were given either 2 ml/kg of neat liquid or 0.4 ml/kg emulsion. One per cent of the neat liquid and 8% of the emulsion were recovered from the tissues respectively 24 hours later. The lungs had the largest amount followed by the intestine, adipose tissue and lymph nodes. Dogs were sacrificed at various intervals following 4 ml/kg of neat liquid or 2 ml/kg of emulsion. Less than 1% of the dose was found in the tissues at 24 hours. A similar pattern of perfluoroctylbromide distribution was observed as in the rats. The tissue contents of perfluoroctylbromide at three months were below the limit of detection. The perfluoroctylbromide levels in the blood and urine of dogs and human volunteers were either non-detectable or barely detectable over a 48-hour period.