Assessment of Ventilation Parameters for Extubation Prediction in ICU

Due to acute respiratory failure, mechanical ventilation support is provided to over 20 million patients worldwide. Therefore, various studies are being conducted to prevent ventilation-associated lung injury in patients receiving invasive mechanical ventilation, especially in conditions such as acute respiratory distress syndrome (ARDS).

Initially, protective mechanical ventilation studies have shown that keeping plateau pressure (Pplat), reflecting static compliance, below 30 cmH2O along with low tidal volume reduces all-cause mortality. Subsequent studies have defined driving pressure as Pplato-PEEP, suggesting that keeping driving pressure below 15 cmH2O may reduce excessive strain on healthy lung tissue and the development of ventilator-associated lung injury.

In 2016, Gattinoni and colleagues defined mechanical power as the power applied by the ventilator to the entire respiratory system per minute during mechanical ventilation, prompting research into the relationship between mechanical power and mortality, particularly in ARDS.

Mechanical power consists of three components: energy delivered with each breath when PEEP is applied, energy applied to overcome airway resistance, and elastic energy delivered with each tidal breath.

Finally, Yongpeng Xie and colleagues hypothesized that elastic power, normalized by compliance, has a more significant relationship with mortality in ARDS patients. Studies on mechanical power, driving pressure, and elastic power typically focus on values measured on the first day of intubation and are predominantly conducted in ARDS patients.

By including all patients under invasive mechanical ventilation in the study, the importance of measuring and monitoring mechanical ventilator parameters (mechanical power, driving pressure, and elastic power) at 0th, 24th, and 48th hours to predict extubation within the first week is being determined. This aims to identify when early extubation should be considered, when extubation should be delayed, and to prepare for alternative treatment options like tracheostomy in cases where extubation might be prolonged.

Inclusion criteria

• consenting patients who have recently been intubated for acute respiratory failure

Exclusion criteria

• patients with lung cancer/ lung metastasis
• ECMO
• death within 24 hours