Use of Lung Ultrasound for Assessment of Lung Recruitment Maneuvers in Patients with ARDS

Authors

  • Waheed A. Radwan Department of Critical Care, Faculty of Medicine, Cairo University, Cairo, Egypt
  • Mohamed M. Khaled Department of Critical Care, Faculty of Medicine, Cairo University, Cairo, Egypt
  • Ayman G. Salman Department of Critical Care, Faculty of Medicine, Cairo University, Cairo, Egypt
  • Mohmed A. Fakher Department of Critical Care, Faculty of Medicine, Cairo University, Cairo, Egypt
  • Shady Khatab Department of Critical Care, Faculty of Medicine, Cairo University, Cairo, Egypt https://orcid.org/0000-0002-9821-9478

DOI:

https://doi.org/10.3889/oamjms.2021.6883

Keywords:

Mechanical ventilation, Lung recruitment, Lung ultrasound, Optimal positive end-expiratory pressure

Abstract

BACKGROUND: Positive pressure mechanical ventilation is a non-physiological intervention that saves lives but is not free of important side effects. It invariably results in different degrees of collapse of small airways. Recruitment maneuver (RM) aims to resolve lung collapse by a brief and controlled increment in airway pressure while positive end-expiratory pressure (PEEP) afterward keeps the lungs open. Therefore, ideally RM and PEEP selection must be individualized and this can only be done when guided by specific monitoring tools since lung’s opening and closing pressures vary among patients with different lung conditions.

AIM: The aim of this study was to explore the clinical value of ultrasonic monitoring in the assessment of pulmonary recruitment and the best PEEP.

PATIENTS AND METHODS: This study was conducted on 120 patients, 30 were excluded as in whom lung collapse cannot be confirmed then the rest were 90 patients from whom another 25 patients excluded as they were hemodynamically unstable the rest 65 patients were divided into two groups: Group A: Included 50 mechanically ventilated patients with ARDS, underwent lung recruitment using lung ultrasound and Group B: Included 15 mechanically ventilated patients with ARDS, underwent lung recruitment using oxygenation index. This prospective study was held at many critical care departments around Egypt.

RESULTS: We noticed that lung recruitment in both groups significantly increased Pao2/Fio2 ratio immediately after recruitment compared with basal state and also significantly increase dynamic compliance compared with basal state. The increase in PF ratio immediately was significantly more in ultrasound group than in oxygenation group. Furthermore, we noticed that that P/F ratio 12 h after recruitment decreased compared with P/F ratio immediately after recruitment but significantly increased compared with basal state before recruitment and also we found that the increase in P/F ratio 12 h after recruitment was more significantly in lung ultrasound group than in oxygenation group. Furthermore, we noticed that lung recruitment (both lung ultrasound and oxygenation group) significantly increase RV function using TAPSE compared with basal state. Both opening pressure and optimal PEEP were significantly higher in lung ultrasound group than in oxygenation group. In our study, opening pressure was 37.28 ± 1.25 in lung ultrasound group and was 36.67±0.98 in oxygenation group and optimal PEEP was 14.64 ± 1.08 in lung ultrasound group and was 13.13 ± 0.74 in oxygenation group.

CONCLUSION: Lung US is an effective mean of evaluating and guiding alveolar recruitment in ARDS. Compared with the maximal oxygenation–guided method, the protocol for reaeration in US-guided lung recruitment achieved a higher opening pressure, resulted in greater improvements in lung aeration, and substantially reduced lung heterogeneity in ARDS.

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Published

2021-09-09

How to Cite

1.
Radwan WA, Khaled MM, Salman AG, Fakher MA, Khatab S. Use of Lung Ultrasound for Assessment of Lung Recruitment Maneuvers in Patients with ARDS. Open Access Maced J Med Sci [Internet]. 2021 Sep. 9 [cited 2024 Mar. 29];9(B):952-63. Available from: https://oamjms.eu/index.php/mjms/article/view/6883