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Entries Tagged as 'Shock'

Early fluid resuscitation in sepsis: evidence and perspectives.

December 31st, 2010 · Start a Discussion

Early fluid resuscitation in sepsis: evidence and perspectives.

Shock. 2010 Sep;34 Suppl 1:40-3

Authors: Bozza FA, Carnevale R, JapiassĂș AM, Castro-Faria-Neto HC, Angus DC, Salluh JI

Hemodynamic instability plays a major role in the pathogenesis of systemic inflammation, tissue hypoxia, and multiple organ dysfunction in sepsis. Aggressive fluid replacement is one of the key interventions for the hemodynamic support in severe sepsis. In this scenario, the ability to restore the imbalance between tissue oxygen demand and supply, the heterogeneity in microcirculation, and endothelial dysfunction in the early stages of sepsis are associated with reduced mortality. In 2001, a single-center randomized controlled trial showed impressive reductions in hospital mortality when patients presenting to the emergency department with severe sepsis were treated with an aggressive protocol of fluids, blood transfusion, and inotropes aiming to improve tissue perfusion. However, external validation of this trial remains to be carried out. To date, there is no unequivocal evidence that such strategy is both universally feasible and effective. In the present article, we review the current evidence and comment on the future perspectives on early fluid resuscitation in severe sepsis.

PMID: 20714265 [PubMed - indexed for MEDLINE]

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Tags: Shock

Efficacy and safety of dopamine versus norepinephrine in the management of septic shock.

July 20th, 2010 · Start a Discussion

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Efficacy and safety of dopamine versus norepinephrine in the management of septic shock.

Shock. 2010 Apr;33(4):375-80

Authors: Patel GP, Grahe JS, Sperry M, Singla S, Elpern E, Lateef O, Balk RA

The optimum septic shock vasopressor support strategy is currently debated. This study was performed to evaluate the efficacy and safety of norepinephrine (NE) and dopamine (DA) as the initial vasopressor in septic shock patients who were managed with a specific treatment protocol. A prospective, randomized, open-label, clinical trial was used in a medical intensive care unit comparing DA with NE as the initial vasopressor in fluid-resuscitated 252 adult patients with septic shock. If the maximum dose of the initial vasopressor was unable to maintain the hemodynamic goal, then fixed-dose vasopressin was added to each regimen. If additional vasopressor support was needed to achieve the hemodynamic goal, then phenylephrine was added. The primary efficacy end point was all-cause 28-day mortality. Secondary end points included organ dysfunction, hospital and intensive care unit length of stay, and safety (primarily occurrence of arrhythmias). The 28-day mortality rate was 50% (67/134) with DA as the initial vasopressor compared with 43% (51/118) for NE treatment (P = 0.282). There was a significantly greater incidence of sinus tachycardia with DA (24.6%; 33/134) than NE (5.9%; 7/118) and arrhythmias noted with DA treatment (19.4%; 26/134) compared with NE treatment (3.4%; 4/118; P < 0.0001), respectively. Logistic regression analysis identified Acute Physiologic and Chronic Health Evaluation II score (P < 0.0001) and arrhythmia (P < 0.015) as significant predictors of outcome. In this protocol-directed vasopressor support strategy for septic shock, DA and NE were equally effective as initial agents as judged by 28-day mortality rates. However, there were significantly more cardiac arrhythmias with DA treatment. Patients receiving DA should be monitored for the development of cardiac arrhythmias (NCT00604019).

PMID: 19851126 [PubMed - indexed for MEDLINE]

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Frequency and predictors of ventilator-associated pneumonia recurrence: a meta-analysis.

April 22nd, 2009 · Start a Discussion

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Frequency and predictors of ventilator-associated pneumonia recurrence: a meta-analysis.

Shock. 2008 Nov;30(5):487-95

Authors: Siempos II, Athanassa Z, Falagas ME

Large clinical series focusing on the risk factors associated with recurrence after the onset of an initial episode of ventilator-associated pneumonia (VAP) produced inconsistent results. A meta-analysis would be helpful to shed light on the issue. Our objective was to estimate the frequency of VAP recurrence and to identify risk factors associated with it. PubMed, Scopus, Current Contents, and references of retrieved articles were searched without language restrictions. Pooled odds ratios (ORs) and 95% confidence intervals (CIs) were calculated by using both the Mantel-Haenszel fixed-effect and the DerSimonian-Laird random effects models. The overall frequency of VAP recurrence in 969 patients of the seven eligible reports was 26.8%. Among the 20 evaluated risk factors, only acute lung injury/acute respiratory distress syndrome (OR, 1.76; 95% CI, 1.12-2.75) and shock (OR, 1.55; 95% CI, 1.01-2.41) at the day of diagnosis of the first VAP episode were found to be associated with VAP recurrence. There was also evidence, albeit inconsistent, that severity of illness at intensive care unit admission was associated with VAP recurrence. Recurrence involves almost one in four cases of VAP and is associated with acute lung injury/acute respiratory distress syndrome and shock, but not with first-episode causative pathogens. Recognition of these predictors may permit the timely implementation of measures to prevent recurrence of VAP.

PMID: 18461027 [PubMed - indexed for MEDLINE]

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Tags: Shock