Critical care medicine
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Critical care medicine · Apr 2015
Prehospital Aspirin Use Is Associated With Reduced Risk of Acute Respiratory Distress Syndrome in Critically Ill Patients: A Propensity-Adjusted Analysis.
Platelet activation plays an active role in the pathogenesis of acute respiratory distress syndrome. In our prior study of 575 patients at high risk for acute respiratory distress syndrome, concurrent statin and aspirin use was associated with reduced acute respiratory distress syndrome. However, the largest study (n = 3,855) to date found no significant benefit of prehospital aspirin in a lower-risk population when adjusted for the propensity for aspirin use. We aimed to determine whether prehospital aspirin use is associated with decreased acute respiratory distress syndrome in patients at high risk for acute respiratory distress syndrome after adjusting for the propensity to receive aspirin. ⋯ In this selected cohort of critically ill patients, prehospital aspirin use was independently associated with a decreased risk of acute respiratory distress syndrome even after adjusting for the propensity of prehospital aspirin use. These findings support the need for prospective clinical trials to determine whether aspirin may be beneficial for the prevention of clinical acute respiratory distress syndrome.
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Critical care medicine · Apr 2015
How Clinicians Discuss Critically Ill Patients' Preferences and Values With Surrogates: An Empirical Analysis.
Although shared decision making requires clinicians to discuss the patient's values and preferences, little is known about the extent to which this occurs with surrogates in ICUs. We sought to assess whether and how clinicians talk with surrogates about incapacitated patients' preferences and values. ⋯ In roughly a third of ICU family conferences for patients at high risk of death, neither clinicians nor surrogates discussed patients' preferences or values about end-of-life decision making. In less than 12% of conferences did participants address values of high importance to most patients, such as cognitive and physical function. Interventions are needed to ensure patients' values and preferences are elicited and integrated into end-of-life decisions in ICUs.
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Critical care medicine · Apr 2015
Observational StudyChest Compression Rates and Survival Following Out-of-Hospital Cardiac Arrest.
Guidelines for cardiopulmonary resuscitation recommend a chest compression rate of at least 100 compressions/min. A recent clinical study reported optimal return of spontaneous circulation with rates between 100 and 120/min during cardiopulmonary resuscitation for out-of-hospital cardiac arrest. However, the relationship between compression rate and survival is still undetermined. ⋯ After adjustment for chest compression fraction and depth, compression rates between 100 and 120 per minute were associated with greatest survival to hospital discharge.
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Critical care medicine · Apr 2015
The Role of Systemic Antibiotics in Acquiring Respiratory Tract Colonization With Gram-Negative Bacteria in Intensive Care Patients: A Nested Cohort Study.
Colonization of the respiratory tract with Gram-negative bacteria in intensive care patients increases the risk of subsequent infections. Application of systemic antibiotics may prevent colonization with Gram-negative bacteria, but this effect has never been quantified. The objective of this study was to determine associations between systemic antibiotic use and acquisition of respiratory tract colonization with Gram-negative bacteria in ICUs. ⋯ Among patients not colonized with Gram-negative bacteria in the respiratory tract at admission to ICU, systemic antibiotics during ICU stay were not associated with a reduction in acquisition of Gram-negative bacteria carriage in the respiratory tract during the ICU stay.
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Critical care medicine · Apr 2015
Tissue Oxygen Saturation and Finger Perfusion Index in Central Hypovolemia: Influence of Pain.
Tissue oxygen saturation and peripheral perfusion index are proposed as early indirect markers of hypovolemia in trauma patients. Hypovolemia is associated with increased sympathetic nervous activity. However, many other stimuli, such as pain, also increase sympathetic activity. Since pain is often present in trauma patients, its effect on the indirect measures of hypovolemia needs to be clarified. The aim of this study was, therefore, to explore the effects of hypovolemia and pain on tissue oxygen saturation (measurement sites: cerebral, deltoid, forearm, and thenar) and finger photoplethysmographic perfusion index. ⋯ Pain (cold pressor test) reduces tissue oxygen saturation in all measurement sites (except cerebral) and perfusion index. In the presence of pain, tissue oxygen saturation and perfusion index are further reduced by hypovolemia (lower body negative pressure, -60 mm Hg). Thus, pain must be considered when evaluating tissue oxygen saturation and perfusion index as markers of hypovolemia in trauma patients.