pressure in heart chambers pulmonary shunt vs dead space

This allows for a calculation of the net volume of CO 2 expired (Vco 2) by the patient expressed as a volume of gas in mL/min rather than a partial pressure or gas fraction. Volume-based capnography is known as volumetric CO 2 monitoring (Vco 2) it uses a combined CO 2 sensor and a pneumotachometer. Time-based capnography is most widely known as end-tidal carbon dioxide (P ETCO 2) monitoring. 1,2 Capnography is the graphic display of measured Fco 2 and can be time or volume based. Capnometry: Current TechnologiesĬapnometry (digital display of data) is the measurement of fractional carbon dioxide (Fco 2) tidal gas at the airway opening. Changes in circulatory and respiratory status can be detected sooner with capnography than with pulse oximetry. Life-threatening airway malfunctions can be averted with the use of continuous capnometry monitoring.

Potentially preventable patient deaths have occurred because of ventilation-related problems. By Roy Ramirez, RRT-NPS, RPFT Terri Pickar, CRT-NPS Sam Frens, RRT-NPS James Cappon, MD and John Cleary, MD Capnography and capnometry are valuable tools for many applications when used in conjunction with other clinical data.

Pressure in heart chambers pulmonary shunt vs dead space