Archive for May 21, 2014

Capnography can detect early phases of respiratory depression which can allow more precise and safe use of medications. Monitoring of exhaled carbon dioxide should be considered for all patients receiving medications that will potentially experience decreased respiratory rates.
The comparison between capnography and pulse oximetry:

Capnography:

Carbon Dioxide Reflects ventilation
Hypoventilation/apnea detected immediately
Reflects ventilation changes within 10 seconds
Should be used with pulse Oximetry

Pulse Oximetry:

Oxygen saturation Reflects oxygenation
SpO2 changes lag when patient is hypoventilation or apneic
Reflects changes in oxygenation with 5 minutes
Should be used with capnography

History of Capnography

Capnography used by anesthesiologists since the 1970’s and