PFS Specifications

Capabilities

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
Other subsystems

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.

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