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Monitoring Carbon Dioxide

Use the CO2 measurement to monitor the patient’s respiratory status and to control patient ventilation.

There are two methods for measuring carbon dioxide in the patient’s airway:

Mainstream measurement uses a CO2 sensor attached to an airway adapter directly inserted into the patient’s breathing system. This method is available with the M3014A Capnography Extension and

the M3016A Mainstream Extension to the M3001A Multi-Measurement Server.

Sidestream measurement takes a sample of the respiratory gas with a constant sample flow from the

patient’s airway and analyzes it with a remote CO2 sensor built into the measurement system. Philips offers the sidestream CO2 measurement in the M3014A Capnography Extension and the Microstream method of sidestream CO2 measurement in the M3015A Microstream CO2 Measurement Extension.

In both cases, the measurement principle is infrared transmission, where the intensity of infrared light passing the respiratory gas is measured with a photo detector. As some of the infrared light is absorbed by the CO2 molecules, the amount of light passing the gas probe depends on the concentration of the measured CO2.

When using a wet ventilator circuit, monitor mainstream CO2 if available, in preference to sidestream CO2.

The partial pressure is calculated from the gas concentration by multiplying the concentration value with the ambient pressure.

The measurement provides:

a CO2 waveform.

an end tidal CO2 (etCO2) value: the CO2 value measured at the end of the expiration phase.

an inspired minimum CO2 (imCO2): the smallest value measured during inspiration.

an airway respiration rate (awRR): the number of breaths per minute, calculated from the CO2 waveform.

Depending on the Max Hold setting configured for your monitor, the etCO2 numeric shows either the highest CO2 value measured within the configured time period (Max Hold set to 10 sec or 20 sec) or the etCO2 numeric shows breath-to-breath value (Max Hold set to Off).

Refer to your Gas Module Instructions for Use, if you are using a Gas Module to monitor CO2.

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Philips MP60/70/80/90, MP20/30, MP40/50 manual Monitoring Carbon Dioxide

MP60/70/80/90, MP40/50, MP20/30 specifications

Philips MP20/30, MP40/50, and MP60/70/80/90 are advanced patient monitoring systems designed to enhance clinical workflows and patient care in diverse healthcare settings. These devices combine cutting-edge technologies and user-friendly interfaces, making them essential tools for hospitals and healthcare providers.

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