1. Kurt Freund developed the penile plethysmograph in Czechoslovakia in the 1950s. 2. The plethysmograph has two chambers, each fitted with a pneumotachograph. 3. In such cases it is more accurate to use a body plethysmograph . 4. Pulmonary plethysmographs are used to measure functional residual capacity. 5. Another common type of plethysmograph is the penile plethysmograph. 6. Another common type of plethysmograph is the penile plethysmograph . 7. The standard plethysmograph sizes are for the study of mice, rats and guinea pigs. 8. In 1995 Masimo introduced perfusion index, quantifying the amplitude of the peripheral plethysmograph waveform. 9. It is used more as a plethysmograph . 10. Another important parameter, which can be calculated with a body plethysmograph is the airway resistance.
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