Respiratory parameters such as airflow and nasal pressure are significant when undertaking sleep studies in regards to detecting respiratory disturbances. 

ADInstruments’ flexible and easily customized systems are designed to be simple to setup and use, minimizing interference with your sleep study subjects to ensure accurate recording and results of their respiratory activity.

We can help you match Labchart and PowerLab with a comprehensive range of solutions for recording high quality respiratory signals, giving you the power choose robust combinations that best meet your requirements. Our software is algorithm agnostic giving you the ability to easily customize macros suited for your preferred sleep scoring methodology. 

Respiratory and Cardiovascular data from an infant sleep study

Products and Solutions

Record multiple signals<br />
at one time

Record multiple signals
at one time

Complete<br />


Mix and match products<br />
for a custom solution

Mix and match products
for a custom solution

Integrate all your data<br />
streams in one place

Integrate all your data
streams in one place

In conjunction with our complete systems shown below, any device with an analog output (+/- 10V) can be connected to a PowerLab data acquisition system for synchronization of event in LabChart. So you have even more flexibility and can integrate all your data streams in one place.

All of our hardware recommended for human use is backed by the appropriate safety certification standards. More information on safety standards.


The Human NIBP Nano monitoring system allows recording and measurement of a continuous blood pressure signal from an adult human via a non-invasive dual finger cuff system.

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Components & Related Products

Typical Biopotential Sleep Studies



Pulmonary Function Analysis

Lung function testing

Hypoxia studies

Respiratory disease studies

Restrictive or Constrictive airway disorders

Signals Supported


Record and analysis a range of respiratory and  pulmonary pressures including

  • Airway resistance (pressure difference developed per unit flow into or out of the lungs)
  • Airway conductance (flow generated per unit of pressure drop across the airways)
  • Compliance (volume change per unit of pressure change)
  • As well as Maximal Inspiratory Pressure (MIP) (greatest subatmospheric pressure developed during inspiration against an occluded airway)
  • And Maximal Expiratory Pressure (MEP) (highest pressure that can be developed during a forceful expiratory effort against an occluded airway) 
Respiratory Flow

Measure Peak expiratory flow (PEF) as maximum flow rate attained during FVC maneuver, or peak inspiratory flow (PIF) as peak flow rate at inhalation. Graph flow-volume to indicate obstruction and/or restriction present in airway abnormalities.

Respiratory Gas Analysis

 The simultaneous measurement of respiratory gas concentrations and airflow with our metabolic systems permits the calculation of the following metabolic parameters.

  • VO2, the rate of oxygen consumptions (L/min)
  • VCO2, the rate of carbon dioxide production (L/min)
  • RER, respiratory exchange ratio (VCO2/VO2)
  • VE, the expired minute ventilation (L/min) 
Respiratory Rate

Measure breathing trace / breathing rate through changes in band circumference are used to characterize breathing patterns (inhalation, exhalation and breathing strength). 


Record pulse and blood oxygen saturation (SpO2) in relation to other signals like ECG, spirometry or blood pressure. 


Nasal temperature can be used as an indicator of respiration.


Measure Forced Vital Capacity (FVC),  Forced Expiratory Volume (FEVT) as measures of expired gas volumes. 

Flexible Data Acquisition

ADInstruments systems provide an integrated solution to advance life science research. With the combination of LabChart analysis software and a PowerLab data acquisition unit you have the flexibility to collect and synchronize a wide range of signals for analysis. We also offer a range of LabChart compatible solutions able to stream directly in LabChart.



Enabling Discovery

LabChart data analysis software creates a platform for all of your recording devices to work together, allowing you to acquire biological signals from multiple sources simultaneously and apply advanced calculations and plots as your experiment unfolds.

LabChart and Respiratory



Data with Integrity

High-performance data acquisition hardware designed for life science research. PowerLab is engineered for precise, consistent, reliable data acquisition, giving you the reproducible data you need while meeting the strictest international safety standards.

Learn more

All your Respiratory analysis in one place

LabChart software is designed specifically for life science data and provides up to 32 channels for data display and analysis options that are powerful and easy to use. With auto-recognition of ADI and LabChart Compatible hardware, multi-window views, one touch recording, simultaneous recording from multiple devices, specialized preconfigured settings, easy sharing options and an interface that can be customized to show only the features you want to use.

  • Respiratory and Cardiovascular data from an infant sleep study

    Respiratory and Cardiovascular data from an infant sleep study

RER higher than expected?

RER is calculated by dividing VCO2 by VO2, therefore if the VCO2 is higher than expected but the VO2 is normal, this would explain the high RER. Alternatively, if the VCO2 is normal, but the VO2 seems low, this would also explain the high RER. In either case, the raw CO2 and O2 values should be assessed by recording known concentrations of each to make sure these are calibrated correctly. If the CO2 and O2 values are not contributing to the high RER, the flow calibration should be checked. Other factors that might cause a high RER are subject panting/breathing uncomfortable once the face mask is attached creating a higher than normal CO2 output. Another common problem can be air leaks, either from around the face mask which must be completely air tight, or within the breathing circuit. 


Features and Add-Ons

Additional acquisition and analysis features and add-ons to support your Respiratory studies:

Explore Respiratory Data in LabChart Reader

LabChart Reader is a free application for conducting limited analyses of LabChart data. Download a trial package with example data below.

Platform Required

Thanks! Your trial package is now downloading.

Once downloaded, please unzip the folder and install the LabChart Reader application.

Open the "LabChart Data Files" folder to find data files (".adicht"). Data files can be opened in LabChart Reader by double clicking on the file name.

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Thank you for your interest in Respiratory. Please complete and submit the form below and an ADInstruments representative will aim to get in touch within one working day. If you’d like to speak to someone immediately, office contact information is available from the contact page.

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