Diffusion capacity test: PDT-111/d

The device can be used to measure the lung's transfer factor, the oxygen bounding ability and the functional residual capacity

  • High capacity demand valve with extremely low opening pressure
  • Easily disinfectable patient circuit
  • Direct gas analysis without gas sampling balloon
  • Full automatic calibration and self test

The Diffusion capacity test device fully complies with the specifications and requirements of the “Single-breath Carbon Monoxide Diffusing Capacity Recommendations for a Standard Technique” -1995 Update by American Thoracic Society

Software system overview 

  • Measurement modes
  • Measured parameters
  • Accessories
  • Technical data
  • "Single breath” method with breath hold
  • “Intra breath” method without breath hold
  • Cardiac output (optional)
  • Forced ex- and inspiration
  • Static vital capacity
  • Maximal voluntary ventilation

Whole list of Pulmonary Function Tests’ parameters

  Diffusion Capacity Test
TLC Total Lung Capacity
FRC Functional Residual Capacity
FRC/TLC Ratio of FRC and TLC in %
Tlco Transfer factor of the lung for CO [mmol/min/Pa]
Dlco Transfer factor of the lung for CO [ml/min/mmHg]
Klco Transfer coefficient of the lung for CO
BHt Breath Hold Time
WOV Wash-Out Volume
CO ppm CO concentration in the exhaled air
Tlco IB Intra-Breath Transfer factor of the lung for CO [mmol/min/Pa]
Dlco IB Intra-Breath Transfer factor of the lung for CO [ml/min/mmHg]
Klco IB Intra-Breath Transfer coefficient of the lung for CO
  Forced ex and inspiration
FVC Forced Vital Capacity
FEV*0.5 Forced Expiratory Volume in 0.5 second
FEV*1.0 Forced Expiratory Volume in 1.0 second
FEV*0.5/IVC Ration of FEV*0.5 and IVC in %
FEV*0.5/FVC Ration of FEV*0.5 and FVC in %
FEV*1.0/IVC Ration of FEV*1.0 and IVC in %
FEV*1.0/FVC Ration of FEV*1.0 and FVC in %
PEF Peak Expiratory Flow
FEF*25-75% Forced mid-Expiratory Flow rate
FEF*75% Forced Expiratory Flow at 75% lung volume
FEF*50% Forced Expiratory Flow at 50% lung volume
FEF*25% Forced Expiratory Flow at 25% lung volume
FET Forced Expiratory Time
MTT Mean Transit Time
FIVC Forced Inspiratory Vital Capacity
FIV*0.5 Forced Inspiratory Volume in 0.5 sec
FIV*1.0 Forced Inspiratory Volume in 1.0 sec
PIF Peak Inspiratory Flow rate
FIF*25-75% Forced mid-Inspiratory Flow rate
  Static vital capacity
IVC Inspiratory Vital Capacity
IRV Inspiratory Reserve Volume
ERV Expiratory Reserve Volume
TV Tidal Volume
SVC Slow Vital Capacity
  Maximal Voluntary Ventilation
MVV Maximal Voluntary Ventilation
MVV*f Maximal Voluntary Ventilation Frequency
Flow meter PinkFlow
Type PPF-18
Principle Symmetric and averaging Pitot tube
Flow range ±18 l/s
Accuracy ±2% or 50 ml, whichever is greater
Dead space 36 ml
Resistance 60 Pa/l/s @ 15 l/s
Accuracy of volume ±3 % or ±50 ml
Accuracy of Transfer Factor ±3 % or ± 0,50 [mmol/min/Pa]
Gas mixture CO 0,3%
  CH4 0,3%
  Rest artificial air
Gas analyzer Super fast multi channel NDIR
Resolution 0,001%
Response time T90 130 ms
Capacity of Demand valve Max. 6 l/s
Size without patient circuit Height: 130 mm
  Wide: 260 mm
  Long: 390 mm
Weight 4 kg
Power supply 90 ÷ 260 VAC 50/60 Hz
Power consumption 60 VA




Patient circuit   “Single breath” DLCO measurement with breath hold
DLCO system on the PC cart   “Intra breath” DLCO measurement without breath hold
Volume calibration with a hanging calibration syringe for one hand operation   FVC measurement
    IVC measurement
    MVV measurement