What does "EGT" mean on a patient monitor?

"EGT" on a patient monitor typically stands for "End-Tidal Gas Temperature" or more commonly "End-Tidal CO2 (ETCO2) Gas Temperature" depending on the manufacturer, but in most clinical contexts EGT specifically means End-Tidal CO2 (also abbreviated EtCO2 or PETCO2) measured at the end of exhalation.

What it indicates

• End-tidal CO2 (EtCO2): the concentration (or partial pressure) of carbon dioxide in the gas exhaled at the end of a breath. It reflects ventilation, perfusion and metabolism and is used to monitor respiratory status, confirm endotracheal tube placement, guide ventilation during anesthesia and critical care, and detect changes in cardiac output or pulmonary embolism.
• Typical numeric display: reported in mmHg or kPa; a normal value for healthy, ventilating adults is about 35–45 mmHg (≈4.7–6.0 kPa), but clinical context matters.

How it is measured

• Mainstream capnography: sensor placed directly in the airway circuit, measures CO2 in real time.
• Sidestream capnography: small sample of exhaled gas is drawn to a sensor located in the monitor.

Limitations and important notes

• EtCO2 approximates arterial CO2 (PaCO2) but is usually slightly lower; the gradient can widen with ventilation–perfusion mismatch, lung disease, low cardiac output or airway obstruction.
• Measurement can be affected by leaks (around an uncuffed tube), high oxygen flows, secretions, or equipment dead space.
• Always interpret EtCO2 together with clinical exam, pulse oximetry and blood gases when necessary.

If you meant a different abbreviation (for example EGT for "exhaled gas temperature" or an equipment-specific label), tell me the monitor make/model or the exact label shown and I can clarify.