Inspiratory pauses of 0.5 and 2.0 seconds during respiratory mechanics assessment do not produce hemodynamic changes in mechanically ventilated patients: cross-sectional study
DOI:
https://doi.org/10.17267/2238-2704rpf.2024.e5672Keywords:
Respiratory Mechanics, Physiotherapy, Hemodynamic MonitoringAbstract
INTRODUCTION: The heart-lung interaction is influenced by mechanical ventilation (MV), which directly impacts venous return and cardiac output through, but not limited to, adjustments in positive end-expiratory pressure (PEEP) and mean airway pressure (Pmean). Additionally, inspiratory pauses for the assessment of pulmonary mechanics interrupt thoracic movement, potentially further impacting this interaction. OBJECTIVE: To compare hemodynamic changes during 0.5 and 2.0-second inspiratory pauses during respiratory mechanics measurements. METHODS: This is a cross-sectional study conducted in the intensive care units of a hospital in Salvador/BA. Patients on MV and over 18 years old were included. Exclusions were made for those with hemodynamic instability and sustained hypoxemia during the evaluation. For sample characterization, patients were divided into groups with and without pulmonary conditions. The main data collected and analyzed were PEEP, Pmean, systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP), and heart rate (HR). For data comparison, Wilcoxon-Rank and Mann-Whitney tests were used for paired and unpaired data, respectively. RESULTS: Thirty-seven patients were included, with a median age of 63 years, 19 (51.4%) males, and 30 (81.1%) with an admission diagnosis of a clinical nature. No statistically significant hemodynamic changes were identified between the 0.5 and 2.0-second inspiratory pause times in the variables SBP (p=0.99), DBP (p=0.11), MAP (p=0.29), and HR (p=0.25). CONCLUSION: No hemodynamic variations were identified during respiratory mechanics measurements at 0.5 and 2.0-second inspiratory pauses.
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Copyright (c) 2024 Thainá Regina dos Santos, Tainã de Jesus Cerqueira Santos, Bruno Prata Martinez, Helder Brito Duarte
This work is licensed under a Creative Commons Attribution 4.0 International License.
This work is licensed under a Creative Commons Attribution 4.0 International License.
