Assessment of changes of regional ventilation distribution in the lung tissue depending on the driving pressure applied during high frequency jet ventilation

作者：Bialka Szymon; Copik Maja; Rybczyk Katarzyna; Owczarek Aleksander; Jedrusik Ewa; Czyzewski Damian; Filipowski Marek; Rivas Eva; Ruetzler Kurt; Szarpak Lukasz^*; Misiolek Hanna

来源：BMC Anesthesiology, 2018, 18(1): 101.

DOI：10.1186/s12871-018-0552-2

• Jet ventilation
• Driving pressure
• High frequency
• Inspiratory pressure

Background: Electrical impedance tomography (EIT) is a tool to monitor regional ventilation distribution in patient's lungs under general anesthesia. The objective of this study was to assess the regional ventilation distribution using different driving pressures (DP) during high frequency jet ventilation (HFJV).
Methods: Prospective, observational, cross-over study. Patients undergoing rigid bronchoscopy were ventilated HFJV with DP 1.5 and 2.5 atm. Hemodynamic and ventilation parameters, as well as ventilation in different regions of the lungs in percentage of total ventilation, assessed by EIT, were recorded.
Results: Thirty-six patients scheduled for elective rigid bronchoscopy. The final analysis included thirty patients. There was no significant difference in systolic, diastolic and mean arterial blood pressure, heart rate, and peripheral saturation between the two groups. Peak inspiratory pressure, mean inspiratory pressure, tidal volume, and minute volume significantly increased in the second, compared to the first intervention group. Furthermore, there were no statistically significant differences between each time profiles in all ROI regions in EIT.
Conclusions: In our study intraoperative EIT was an effective method of functional monitoring of the lungs during HFJV for rigid bronchoscopy procedure. Lower driving pressure was as effective in providing sufficient ventilation distribution through the lungs as the higher driving pressure but characterized by lower airway pressure.

• 出版日期2018-7-31