One-lung ventilation is a mechanical ventilation method frequently used during several thoracic surgeries. One-lung ventilation requires the use of protective ventilation to limit ventilator-induced injury and reduce postoperative respiratory complications. Protective ventilation during one-lung ventilation is specific since tidal volumes are applied by definition to one lung, and it is recommended to use lower tidal volumes, down to 4 ml/kg of ideal body weight. This approach requires individualized ventilation parameters, which differs from the conventional or two-lung ventilation, and there are no clear recommendations regarding respiratory rate adjustment to ensure adequate gas exchange.
The aim of the study is to: 1. Evaluate whether the initial ventilation settings (tidal volume and respiratory rate) during one-lung ventilation are appropriate to prevent respiratory acidosis. 2. Compare the ventilation settings (tidal volume and respiratory rate) made by clinicians with those proposed by an smartphone application ''VentilO''.
Study Type
OBSERVATIONAL
Enrollment
100
Arterial blood gases during one lung ventilation
Institut universitaire de cardiologie et de pneumologie de Québec - Université Laval
Québec, Quebec, Canada
RECRUITINGRespiratory acidosis
The frequency of respiratory acidosis on arterial blood gases after 20 minutes of mechanical ventilation (pH \< 7.35 and PaCO2 \> 45mmHg) measured by arterial blood gases
Time frame: 20 minutes after initiation of one lung ventilation after lung isolation
Respiratory rate
Respiratory rate set by the doctor, this respiratory rate will be compared to the suggestion of the algorithm
Time frame: At the beginning of one lung ventilation during the surgery
Acid-base disorder
Presence of Respiratory alkalosis define by pH\>7.45 and PaCO2 \< 35 mmHg
Time frame: At the beginning of one lung ventilation during the surgery
Number of participants with hemodynamic shock - hypotension
Requiring \>1L of volume repletion and/or use of amines at \>0.05 mcg/kg/min or norepinephrine equivalent
Time frame: Day 1
Hospital length of stay
Recovery room admission through hospital discharge
Time frame: Up to 90 days
Mechanical Ventilation duration
Time spent with invasive mechanical ventilation during surgery and hospital stay
Time frame: Up to 90 days
Hospital mortality
Occurence of death during hospital stay
Time frame: Up to 90 days
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