Journal of critical care
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Journal of critical care · Dec 2008
ReviewImportant issues in the design and reporting of clinical trials in severe sepsis and acute lung injury.
Severe sepsis and acute lung injury are challenging diagnoses as they relate to designing and reporting of clinical trials. The limited success in bringing forward new therapies in these areas is likely proof of that premise. The ability to use preclinical and phase I and II trial data to predict which patients and which dosing regimens are more likely to benefit is perhaps the greatest challenge. ⋯ Conflict of interest issues which rested dormantly for years are now at the forefront of discussion, and journal editorial board responsibility in this area is being recognized. Protocols may also help reduce heterogeneity of treatment across centers in clinical trials. This article reviews many of the problems encountered in clinical trial design and reporting and offers a perspective on dealing with them to the betterment of a clinical trial.
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The purpose of this review is to introduce differential equations as a simulation tool in the biological and clinical sciences. This modeling technique is very mature and has been a preferred tool of physiologists and bioengineers and of quantitative scientists in general to describe and predict the behavior of complex interacting systems. ⋯ We conclude that the usefulness of quantitative modeling, including equation-based models, is ultimately linked to the quality and abundance of observation obtained on the system being modeled. Equation-based modeling, although potentially an integrative approach, is complementary to and extends the potential of traditional statistically based approaches to inference.
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Journal of critical care · Dec 2008
Multicenter StudySerial measurements of f/VT can predict extubation failure in patients with f/VT < or = 105?
To evaluate is serial measurements of respiratory rate (frequency to tidal volume, f/VT) may predict extubation failure (EF) from mechanical ventilation in patients following a successful spontaneous breathing trial (SBT) with first measurement of f/V(T) < or = 105. ⋯ Serial f/V(T) measurements during 120 minutes of SBT were unable to detect EF in patients following a successful SBT with initial f/V(T) lower than 105.
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Journal of critical care · Dec 2008
Intra-abdominal hypertension: incidence and association with organ dysfunction during early septic shock.
The objective of this article is to study the cumulative incidence of intra-abdominal hypertension (IAH) in septic shock (SS) patients during the first 72 hours of intensive care unit (ICU) admission and to determine if the presence and severity of IAH are associated with sepsis morbidity and mortality. ⋯ Septic shock patients have a very high incidence of IAH, which seems to be associated with the severity of shock and could be related to the development of organ dysfunctions, particularly renal dysfunction. Intra-abdominal pressure should be routinely monitored during the course of SS.
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Journal of critical care · Dec 2008
Responding to families' questions about the meaning of physical movements in critically ill patients.
Families may have questions about the meaning of physical movement in critically ill patients for whom movements are likely involuntary. If unresolved, these questions may contribute to difficult communication around end-of-life care. This study used qualitative methods to describe physicians' responses to families' questions about the meaning of patients' movements in critically ill patients. ⋯ Physicians' responses to family questions indicating lack of resolution about the meaning of patients' movements that were likely involuntary can be categorized into 3 types. Physicians may be better able to respond to and resolve these questions by using all 3 types of communication approaches. Future studies should determine if such responses can improve families' experiences and other outcomes.