The PFM/PAM Module - when operated together with the Photoacoustic Analyser Module (PAM) plus the Gas Delivery System (GDS) - forms a respiratory facility capable of a wide range of respiratory and cardiovascular measurements. These are:
- Breath-by-breath measurements of VO2, VCO2, VE
- Diffusing capacity of the lung for CO.
- Expiratory Reserve Volume.
- Forced Expired Spirometry.
- Functional Residual Capacity.
- Respiratory exchange ratio VO2/VCO2.
- Residual Volume.
- Total Lung Capacity.
- Tidal Volume.
- Alveolar Ventilation.
- Vital Capacity.
- Volume of pulmonary capillary blood.
- Dead-space ventilation.
- Cardiac output.
- Fractional inspiratory and expiratory concentrations, FIO2 and FEO2, FICO2and FECO2.
- Numerous other specialised tests of pulmonary function.
The PFM/PAM unit consists of the Respiratory Valve Unit (RVU), with associated flow-meters, rebreathing bag, etc., and an electronics unit. The electronics unit is accommodated in a standard ISS drawer.
The PFS contains three basic modules for analyzing the gasses in the inspired and expired air:
- Multi-Gas Analyzer (PGA-1) for measuring three gases (SF-6, CO2, C2H2)
- Multi-Gas Analyzer (PGA-2) for measuring three gases (CO, R-22,CH4)
- Oxigraf analyser for Oxygen measurement
The PFS contains a number of subsystems to measure other parameters:
- Ambient Conditions Monitoring Subsystem (ACMS)
- Relative humidity (Range 0…100% RH)
- Temperature (Range of 5…50°C)
- Pressure (Range of 800…1100 hPa)
- Differential Pressure Flowmeter (DPFM)
- Flow range -15 l/s to + 15 l/s.
- Turbine Flowmeter (TFM)
- Flow range -10 l/s to + 10 l/s.
- Respiratory Inductance Plethysmograph (RIP)
- Measure cross-sectional area variations at thorax and upper abdomen, of up to 200 cm2 in both cross-sections.