Related Experiment Videos
Evaluation of a Pitot type spirometer in helium/oxygen mixtures
S Søndergaard1, S Kárason, S Lundin
1Department of Anaesthesiology and Intensive Care, Sahlgrenska University Hospital, Gothenburg University, Sweden. soren.sondergaard@mbox319.swipnet.se
Journal of Clinical Monitoring and Computing
|February 19, 1999
Summary
Helium/oxygen mixtures are effective for respiratory tract obstruction. The Datex AS/3 spirometry module with D-lite accurately measures low-density gases, showing less than 5% deviation.
Area of Science:
- Respiratory Medicine
- Pulmonary Physiology
- Medical Device Technology
Background:
- Helium/oxygen mixtures are increasingly used for respiratory tract obstruction.
- Potential benefits for parenchymal lung changes in IRDS/ARDS are being explored.
Purpose of the Study:
- To evaluate the Datex AS/3 Side Stream Spirometry module with D-lite for measuring low-density gas mixtures.
- To compare its performance against established 'golden standard' methods.
Main Methods:
- Simulated controlled and spontaneous ventilation with varying helium/oxygen and nitrogen/oxygen mixtures.
- Simultaneous measurements using the D-lite module, Biotek Ventilator Tester, and body plethysmography.
- Data analysis via a statistical regression model incorporating density, voltage, and volume.
Main Results:
- The D-lite module demonstrated predictable density-dependent behavior.
- Regression equations and percentage deviations between estimated and measured values were determined.
Conclusions:
- The D-lite module provides satisfactory measurements of low-density gases.
- Standard deviations were consistently below 5% across all ventilatory modes and gas mixtures.