Critical care : the official journal of the Critical Care Forum
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Comparative Study
Measurement of alveolar derecruitment in patients with acute lung injury: computerized tomography versus pressure-volume curve.
Positive end-expiratory pressure (PEEP)-induced lung derecruitment can be assessed by a pressure-volume (P-V) curve method or by lung computed tomography (CT). However, only the first method can be used at the bedside. The aim of the study was to compare both methods for assessing alveolar derecruitment after the removal of PEEP in patients with acute lung injury or acute respiratory distress syndrome. ⋯ Alveolar derecruitment measured by the CT and P-V curve methods are tightly correlated. However, the large limits of agreement indicate that the P-V curve and the CT method are not interchangeable.
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Comparative Study
The incidence of relative adrenal insufficiency in patients with septic shock after the administration of etomidate.
Etomidate blocks adrenocortical synthesis when it is administered intravenously as a continuous infusion or a single bolus. The influence of etomidate administration on the incidence of relative adrenal insufficiency in patients with septic shock has not been formally investigated. The objective of this study was to determine the incidence of relative adrenal insufficiency in patients with septic shock after etomidate administration compared with patients with septic shock who did not receive etomidate. ⋯ The incidence of relative adrenal insufficiency in patients with septic shock is increased when the stimulation test is performed after the administration of etomidate.
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Observational Study
The impact of empiric antimicrobial therapy with a β-lactam and fluoroquinolone on mortality for patients hospitalized with severe pneumonia.
National clinical practice guidelines have recommended specific empiric antimicrobial regimes for patients with severe community-acquired pneumonia. However, evidence confirming improved mortality with many of these regimes is lacking. Our aim was to determine the association between the empiric use of a β-lactam with fluoroquinolone, compared with other recommended antimicrobial therapies, and mortality in patients hospitalized with severe community-acquired pneumonia. ⋯ The use of initial empiric antimicrobial therapy with a β-lactam and a fluoroquinolone was associated with increased short-term mortality for patients with severe pneumonia in comparison with other guideline-concordant antimicrobial regimes. Further research is needed to determine the range of appropriate empiric antimicrobial therapies for patients with severe community-acquired pneumonia.
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Little is known about the condition of the large bowel in patients with sepsis. We have previously demonstrated increased concentrations of L-lactate in the rectal lumen in patients with abdominal septic shock. The present study was undertaken to assess the concentrations of L- and D-lactate in rectal lumen and plasma in septic patients including the possible relation to site of infection, severity of disease, and outcome. ⋯ In patients with severe sepsis and septic shock, luminal concentrations of L- and D-lactate in the rectum were related to severity of disease and outcome.
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Comparative Study
How can the response to volume expansion in patients with spontaneous respiratory movements be predicted?
The aim of the study was to evaluate the ability of different static and dynamic measurements of preload to predict fluid responsiveness in patients with spontaneous respiratory movements. ⋯ In patients with spontaneous respiratory movements, DeltaPP and inspiratory changes in RAP failed to predict the response to volume expansion.