Basic Sedation Capnography Skills by Ron Eslinger, CRNA, APN, MA
The learner will be able to:
• Define the components of CO2 monitoring
• Discuss Pros and Cons of Capnography
• Review respiratory cycle
• Compare Capnography to Oximetry
• Identify Parts of the Wave Form
• Can be an integral part of the monitoring done in moderate and procedural sedation.
• Is used to monitor/measure the amount of carbon dioxide in respiratory gases.
• Provides information about the effectiveness of respiration’s and end-tidal carbon dioxide values.
Capnography vs Oximetry
• Capnography monitors ventilation, while pulse oximetry monitors oxygenation.
• Capnography thus provides breath-to-breath feedback, and changes in breathing, like apnea, are reflected immediately.
• Changes in pulse oximetry can lag behind breathing changes.
• Carbon dioxide is produced in the tissues by metabolism and is then diffused into the blood via the venous system (this is basically equal to cardiac output)
• The blood carrying carbon dioxide enters the right side of the heart and from there travels to the lungs.
• This is where oxygen enters the blood.
Increased Safety of Nurse Sedation
• Acute respiratory events or respiratory depression were earlier identified due to the monitoring of the waveforms on the capnography monitor
• Capnography can also help detect alveolar hypoventilation even in the presence of supplemental oxygen
• The use of capnography can reduce hypoxemia and lead to better outcomes in patients undergoing moderate sedation.