Flow Derived Parameters

For monitoring basic respiratory parameters, use Buxco's Flow Derived Parameters (FDP) software analyzer. The FDP analyzer can be used with:

• Head-out chambers
• Nose-only chambers
• Head chambers
• In-line pneumotachographs

A flow transducer detects the respiratory waveform generated either at the nares (nasal flow) or by thoracic movement. This waveform is then analyzed to provide the following:

• Breath frequency
• Tidal volume
• Total volume breathed
• Minute ventilation
• Inspiratory time
• Expiratory time
• Peak inspiratory flow
• Peak expiratory flow
• End inspiratory pause
• End expiratory pause
• Relaxation time
• Expiratory flow at 50% volume (EF50)
• Others

Advantages: Study conscious subjects, study several subjects simultaneously, direct measurement of flows, no temperature or humidity dependence, combine with telemetry

Tradeoffs: subjects must be restrained; a neck seal or mask is required