DLCO-CO Diffusion

DLCO  (diffusing capacity or transfer factor of the lung for carbon monoxide (CO)) is the extent to which oxygen passes from the air sacs of the lungs into the blood.

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The Diffustik adapts to your needs and to those of your patients

 The Geratherm Respiratory Diffustik is the ideal measurement device for lung diffusion, offering reliable, reproducible results from an infrared fast gas analyser.       

           Diffustik has been developed as part of a modular system which can be expanded with the addition of further modules. Thus the carbon monoxide diffusion capacity (DLCO) and accompanying spirometry parameters, such as flow-volume and MVV, can be enhanced with other diagnostically relevant values, such as MIP/MEP, Rocc/Rint or respiratory resistance and lung volumes, with the addition of hardware and software options.

¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†The power of the Diffustik comes from the infrared fast gas analyser, enabling analysis of gas concentrations in real time during inspiration and expiration. The powerful BLUE CHERRY¬ģ software for pulmonary function diagnostic quickly calculates the results and displays user-friendly curve views along with the measurement values.


The Diffustik system coupled with BLUE CHERRY¬ģ diagnostic software offers the measurement of a full suite of spirometry values together with the CO diffusion (DLCO Diffusing capacity or TLCO, Transfer factor¬† of the lung for carbon monoxide) Together, this is enough information to enable a functional differentiation of bronchial asthma, and chronic obstructive pulmonary disease (COPD) such as pulmonary emphysema.


Fast gas analysis using the powerful infrared analyser has revolutionised single breath CO diffusion measurement. The real-time analysis of the inhaled gas removes the requirement for calibration of the system prior to test, this greatly reduces test time and in turn helps to improve the patient experience. The use of carbon monoxide and methane allows the system to determine diffusion capacity together with a single breath measurement of lung volume.


Offline processing

            The manual correction of washout and sample volume allow valid results even in difficult tests

¬†¬†¬†¬†¬†¬†As with all Geratherm Respiratory systems the Diffustik is controlled by the powerful BLUE CHERRY¬ģ cardiopulmonary diagnostic software, measuring, evaluating and displaying results. The simple to understand graphical display shown throughout the test procedure helps the user quickly identify possible leaks for example at the patient mouthpiece connection, as well as providing information about lung anatomy.

Large swivable range

The height of the measuring apparatus can be adjusted quickly over a large swivable range and allows measuring in standing and sitting position.

upward and downward swivable by approximately 60 degrees


Modular concept

    The CO diffusion can be extended with additional options such as MIP/MEP and ROCC or integrated in the Bodystik system.

System solution 

Devices and review workstations can easily be combined to a productive total system and can be networked via GDT or HL7 interface in the local PMS/HIS.

BLUE CHERRY¬ģ – The powerful diagnostic software

Geratherm Respiratory is continuously developing BLUE CHERRY¬ģ to encompass the latest clinical advances and to further improve its use with helpful new functions. Some features include


  • Integrated quality control and measures according to ATS/ERS guidelines


  • Interpretation algorithms and proprietary interpretation graphics for spirometry
  • Latest GLI predicted values (2012 and 2017) including Z-Scores
  • Individually configurable reports
  • Long-term trending and overlay of tests
  • User accounts with different authority levels
  • Optimised workflows through interfaces with HL7 or GDT to existing Hospital systems
  • Powerful reporting including .pdf export
  • Complex and safe network installations with central SQL database