A major factor affecting breath-by-breath respiratory gas measurements is the response time of the O2100C and CO2100C modules. Although the CO2100C module has somewhat faster response times than the O2100C module, both can seemingly create obstacles when performing relatively high-speed breath-by-breath ventilation measurements.
Typically, the O2100C and CO2100C modules are used in conjunction with a mixing chamber and non-rebreathing “T” valve to measure varying gas concentration levels as a function of time. The mixing chamber and “T” valve effectively construct a smoothing filter for expired gases. Because the gas concentrations can change only gradually in this configuration, it is simple to monitor the changing oxygen and carbon dioxide levels present in the mixing chamber.
An alternate, and more difficult, measurement scenario is where oxygen or carbon dioxide concentrations need to be measured exactly, at particular points during a single respiration. In this case, it is very important that the module be able to keep up with the expected rate of change of gas concentration.
This application note will concentrate on methods to improve the response time of the O2100C module. When necessary, the same principles will apply to enhance the speed of the CO2100C module.
New series of unshielded 45 cm electrode leads with thin cable; suitable for facial EMG and other areas where lighter, shorter lead cables are required. Use for female Touchproof connectors to pinch clip connectors—connect electrodes to either a C-series amplifier or an MEC. The pinch connectors are light weight and the lead cable tinsel wire […]
The new issue of Psychophysiology has a study “Quantifying rapid changes in cardiovascular state with a moving ensemble average” using MEAP for preprocessing/analysis and BIOPAC hardware and software for data collection, display, and storage. The proof of concept study demonstrates a viable method for the adoption of ICG measures across the field of psychophysiology. MEAP (moving ensemble […]
BIOPAC provides software and hardware that allow for research teams to record and analyze respiration activity in physiological experimentation. Here are a few notable studies covering MRI, ECG, and Laser Doppler Flow measurement. fMRI & Thermal Perception: The neural mechanisms underlying thermal perception (how hot or cold we perceive the temperature to be) have not been fully […]