Use of TpCO2 (Transcutaneous CO2 Measurement) as PaCO2 Predictor During NIV in Case of Acute Hypercapnic Respiratory Failure

Use of TpCO2 (Transcutaneous CO2 Measurement)as PaCO2 Predictor During Non Invasive Ventilation (NIV) in Case of Acute Hypercapnic Respiratory Failure

In patients suffering from hypercapnic respiratory failure and treated by non invasive ventilation (NIV), the interest of using transcutaneous CO2 measurement to evaluate PaCO2 and PaCO2 variation over time is unknown and will be evaluated in this study. Measurements will be done during one-hour NIV treatments.

Inclusion Criteria:

• ICU patient equipped with an arterial line
• NIV treatment prescribed by the clinician in charge
• Hypercapnia defined by PaCO2> 42mmHg

Exclusion Criteria:

• Severe hemodynamic instability
• Severe psychiatric disorders
• Denied consent
• Age < 18 years