Lung function tests in small experimental animals by means of a signal processing system.

For the analysis of the airflow velocity and oesophageal pressure signals of anaesthetized spontaneously breathing small animals (rats and guinea pigs), a signal processing program package was developed for a multiprocessor system (Electronic Measuring Gears Co., Budapest). 4-10 respiratory cycles were analysed in a signal series and the arithmetic mean value was used to increase the accuracy of the method.