Abstract
Objective: Few are known about the use of inspired fractions of oxygen less than 100% (1) to prevent hypoxemia during endotracheal suctioning (ES). The objective was compare the repercussions of using a FiO2 50% above the baseline with a FiO2 of 100% during ES in mechanically ventilated patients.
Methods: A randomized trial in 17 patients (55,7±23,9 years) underwent 2 sessions of ES (break of 6 hours) with prior hyperoxygenation by two values of FiO2: 50% above the baseline and 100%. The heart rate (HR), mean arterial pressure (MAP), oxygen saturation (SpO2) and breath rate (BR) were recorded at baseline, 5 minutes after adjusting the FiO2, likewise 1 and 5 minutes after the end of procedures.
Results: SpO2 within the groups increased in all phases of the two protocols, compared to baseline. There was an increase in HR at 1 min after ES in protocol with raising the FiO2 to 50%, compared to PRE time and baseline, as well as the BR in procedure with FiO2 of 100%. Already MAP increased only at 1o min compared to baseline in the protocol with increase FiO2 to 50%. In the intergroup analysis, SpO2 and BR was higher in the procedure with FiO2 of 100% at 1 min after the ES, but without clinical relevance.
Conclusion: The use of a FiO2 50% above baseline before and after ES prevented hypoxemia and negative changes in vital signs of stable patients on mechanical ventilation.
- © 2011 ERS