Description of an assembled noninvasive capnography setup

Area of Science:

• Medical Devices
• Respiratory Monitoring
• Transport Medicine

Background:

• Noninvasive capnography is valuable for monitoring spontaneously breathing patients during transport, particularly when sedation is used.
• Current portable transport monitors often lack routine noninvasive capnography capabilities.
• An assembled face mask capnography setup is described for improved respiratory monitoring.

Purpose of the Study:

• To assess the feasibility of an assembled face mask capnography setup.
• To evaluate the performance of this setup using common transport equipment.
• To determine its utility for noninvasive monitoring during patient transport.

Main Methods:

• An assembled setup using a transport monitor's invasive capnography channel and a mainstream inline capnometer was created.
• A standard oxygen face mask was adapted for noninvasive capnography.
• Performance was tested on 17 healthy adult volunteers, assessing waveform quality and response to simulated apnea and head positioning.

Main Results:

• The assembled noninvasive capnography setup successfully produced adequate waveforms in all participants.
• The system reliably triggered the apnea monitor alarm when respiratory rates fell below 6 breaths/min.
• The setup proved effective in visually representing simulated apnea events.

Conclusions:

• An assembled noninvasive capnography system is feasible using readily available portable monitoring devices.
• This setup can display capnographic waveforms for real-time respiratory assessment.
• It provides a visual representation of simulated apnea, enhancing patient safety during transport.