Articles: mechanical-ventilation.
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Am. J. Respir. Crit. Care Med. · Oct 2017
ReviewFifty Years of Research in ARDS. Respiratory Mechanics in Acute Respiratory Distress Syndrome.
Acute respiratory distress syndrome is a multifactorial lung injury that continues to be associated with high levels of morbidity and mortality. Mechanical ventilation, although lifesaving, is associated with new iatrogenic injury. ⋯ This review outlines the measurement and application of clinically applicable pulmonary mechanical concepts, such as plateau pressures, driving pressure, transpulmonary pressures, stress index, and measurement of strain. In addition, the concept of the "baby lung" and the utility of dynamic in addition to static measures of pulmonary mechanical variables are discussed.
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There is a current trend towards lighter or no sedation of mechanically ventilated patients in the intensive care unit. The advantages of less sedation have been demonstrated as shorter duration of mechanical ventilation and reduced length of stay in the intensive care unit and hospital. Non-sedated patients are more awake during mechanical ventilation, but little is known about how this affects the intensive care patient. ⋯ Being awake during mechanical ventilation entailed new opportunities and challenges for critically ill patients. Patients found themselves at the interface between agency and powerlessness as they were able to interact, yet were bound by contextual factors such as bodily weakness, technology, spatial position and relational aspects. This knowledge is important to develop patient-centered nursing practice in the context of lighter sedation.
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Observational Study
Lung Injury Etiology and Other Factors Influencing the Relationship Between Dead-Space Fraction and Mortality in ARDS.
In ARDS, elevated pulmonary dead-space fraction (VD/VT) is a particularly strong indicator of mortality risk. Whether the magnitude of VD/VT is modified by the underlying etiology of ARDS and whether this influences the strength of its association with mortality remains unknown. We sought to elucidate the impact of ARDS etiology on VD/VT and also to determine whether ARDS severity, as classified by the Berlin definition, has correspondence with changes in VD/VT. ⋯ VD/VT magnitude varies by ARDS etiology, as does mortality. Only in mild ARDS does VD/VT fail to distinguish non-survivors from survivors. Nonetheless, VD/VT has the strongest association with mortality risk in those with ARDS.
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Journal of critical care · Oct 2017
Mechanical ventilation weaning protocol improves medical adherence and results.
Implementation of a weaning protocol is related to better patient prognosis. However, new approaches may take several years to become the standard of care in daily practice. We conducted a prospective cohort study to investigate the effectiveness of a multifaceted strategy to implement a protocol to wean patients from mechanical ventilation (MV) and to evaluate the weaning success rate as well as practitioner adherence to the protocol. ⋯ A multifaceted strategy consisting of continuing education and regular feedback can increase physician adherence to a weaning protocol for mechanical ventilation.
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Review Meta Analysis
Low Tidal Volume versus Non-Volume-Limited Strategies for Patients with Acute Respiratory Distress Syndrome. A Systematic Review and Meta-Analysis.
Trials investigating use of lower tidal volumes and inspiratory pressures for patients with acute respiratory distress syndrome (ARDS) have shown mixed results. ⋯ The trend toward lower mortality with LTV ventilation in the primary analysis and the significant relationship between the degree of tidal volume reduction and the mortality effect together suggest, but do not prove, that LTV ventilation improves mortality among critically ill adults with ARDS.