Critical care medicine
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Critical care medicine · Sep 2014
Review Meta AnalysisLactate Clearance Is a Useful Biomarker for the Prediction of All-Cause Mortality in Critically Ill Patients: A Systematic Review and Meta-Analysis.
Lactate clearance has been widely investigated for its prognostic value in critically ill patients. However, the results are conflicting. The present study aimed to explore the diagnostic accuracy of lactate clearance in predicting mortality in critically or acutely ill patients. ⋯ Our study demonstrates that lactate clearance is predictive of lower mortality rate in critically ill patients, and its diagnostic performance is optimal for clinical utility.
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Critical care medicine · Sep 2014
Multicenter StudyRapid Response Team Implementation and In-Hospital Mortality.
To determine the relationship between implementation of rapid response teams and improved mortality rate using a large, uniform dataset from one state in the United States. ⋯ In-hospital mortality improved in six of 10 acute tertiary care hospitals in the post-rapid response team time period when compared with the pre-rapid response team time period. Because of a long-term trend of decline in hospital mortality, these decreases could not be unambiguously attributed to rapid response team implementation. Further research should examine additional objective outcomes and optimal configuration of rapid response teams to maximize intervention effectiveness.
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Critical care medicine · Sep 2014
Mechanical Ventilation-Induced Intrathoracic Pressure Distribution and Heart-Lung Interactions.
Mechanical ventilation causes cyclic changes in the heart's preload and afterload, thereby influencing the circulation. However, our understanding of the exact physiology of this cardiopulmonary interaction is limited. We aimed to thoroughly determine airway pressure distribution, how this is influenced by tidal volume and chest compliance, and its interaction with the circulation in humans during mechanical ventilation. ⋯ Increased tidal volume and decreased chest wall compliance both increase the change in intrathoracic pressures and the value of the dynamic indices during mechanical ventilation. Additionally, the transmural pressure of the vena cava is decreased, whereas the transmural pressure of the right atrium is not changed.
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Critical care medicine · Sep 2014
Arterial Blood Pressure and Neurological Outcome After Resuscitation From Cardiac Arrest.
Guidelines for post-cardiac arrest care recommend blood pressure optimization as one component of neuroprotection. Although some retrospective clinical studies suggest that postresuscitation hypotension may be harmful, and laboratory studies suggest that a postresuscitation hypertensive surge may be protective, empirical data are few. In this study, we prospectively measured blood pressure over time during the postresuscitation period and tested its association with neurologic outcome. ⋯ We found that time-weighted average mean arterial pressure was associated with good neurologic outcome at a threshold of mean arterial pressure greater than 70 mm Hg.
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Critical care medicine · Sep 2014
Multicenter StudySubstance P Mediates Reduced Pneumonia Rates After Traumatic Brain Injury.
Traumatic brain injury results in significant morbidity and mortality and is associated with infectious complications, particularly pneumonia. However, whether traumatic brain injury directly impacts the host response to pneumonia is unknown. The objective of this study was to determine the nature of the relationship between traumatic brain injury and the prevalence of pneumonia in trauma patients and investigate the mechanism of this relationship using a murine model of traumatic brain injury with pneumonia. ⋯ The data demonstrate that patients with traumatic brain injury have lower rates of pneumonia compared to non-head-injured trauma patients and suggest that the mechanism of this effect occurs through traumatic brain injury-induced release of substance P, which improves innate immunity to decrease pneumonia.