Critical care medicine
-
Critical care medicine · Aug 1996
Comparative Study Clinical Trial Controlled Clinical TrialNuclear factor-kappa B is activated in alveolar macrophages from patients with acute respiratory distress syndrome.
The expression of proinflammatory cytokines is rapidly increased in experimental models of the acute respiratory distress syndrome (ARDS), in patients at risk for ARDS, and in patients with established ARDS. Because multiple cytokines are present in bronchoalveolar lavage fluid, a common, proximal activation mechanism may operate in these settings. The proinflammatory cytokines whose expression is increased in the lungs of patients with ARDS have binding sequences in their enhancer/promoter regions for transcriptional regulatory proteins, such as nuclear factor-kappa B (NF-kappa B), nuclear factor-IL6 (NF-IL6), cyclic adenosine monophosphate responsive element binding protein, serum protein-1, and activating protein-1. To test the hypothesis that activation of one or more of these nuclear transcriptional regulatory factors might provide a common mechanism for the simultaneous expression of multiple cytokine genes in the setting of ARDS, we measured activation of these factors in alveolar macrophages from patients with ARDS and from controls. ⋯ These experiments demonstrated increased in vivo activation of the nuclear transcriptional regulatory factor NF-kappa B (but not NF-IL6, cyclic adenosine monophosphate responsive element binding protein, activating protein-1, or serum protein-1) in alveolar macrophages from patients with ARDS. Because binding sequences for NF-kappa B are present in the enhancer/promoter sequences of multiple proinflammatory cytokines, activation of NF-kappa B may contribute to the increased expression of multiple cytokines in the lung in the setting of established ARDS.
-
Critical care medicine · Aug 1996
Multicenter Study Comparative StudyComparative assessment of pediatric intensive care in Moscow, the Russian Federation: a prospective, multicenter study.
Comparative assessment of pediatric intensive care. ⋯ We provided a quantitative description and assessment of pediatric intensive care in Moscow. Moderate efficiency may reflect a low threshold for ICU admission due to poor nurse/patient ratios on the wards. Effectiveness in the low- and medium-risk strata is below standard, as compared with a Western reference population. Excess mortality was concentrated in the low- and medium-risk strata, and can only partially be explained by the inclusion of co-morbidity. Future analysis should focus on specific treatment protocols, protocol adherence, and the determination of infectious and therapeutic complications.
-
Critical care medicine · Aug 1996
Randomized Controlled Trial Clinical TrialN-acetyl-L-cysteine depresses cardiac performance in patients with septic shock.
To investigate the effects of adjunctive therapy with parenteral N-acetyl-L-cysteine in patients with newly diagnosed septic shock. ⋯ Adjunctive therapy with N-acetyl-L-cysteine in newly diagnosed septic shock was associated with a depression in cardiovascular performance, as indicated by progressive reductions in cardiac index, left ventricular stroke work index, and MAP.
-
Critical care medicine · Aug 1996
Randomized Controlled Trial Comparative Study Clinical TrialPolysomnography after adenotonsillectomy in mild pediatric obstructive sleep apnea.
a) To determine the need for intensive monitoring on the first operative night of surgery in children undergoing adenotonsillectomy for mild obstructive sleep apnea; b) to examine the effect of narcotics on postoperative obstructive sleep apnea. ⋯ Our data suggest that children without underlying medical conditions, neuromotor diseases, or carniofacial abnormalities, 1 to 18 yrs of age, who suffer from mild obstructive sleep apnea, have improvements documented by polysomnography on the night of surgery following adenotonsillectomy and do not necessarily need to be monitored intensively. These findings were not significantly affected by the choice of intraoperative anesthetic.
-
Critical care medicine · Aug 1996
Critical illness polyneuropathy: clinical findings and outcomes of a frequent cause of neuromuscular weaning failure.
To describe clinical and electrophysiologic features and outcomes of critically ill patients with neuromuscular causes of failure to wean from mechanical ventilator support. ⋯ Critical illness polyneuropathy is a frequent cause of neuromuscular weaning failure in critically ill patients, regardless of the type of primary illness. Involvement of proximal (including facial and paraspinal) muscles is striking. Tendon reflexes are often preserved. Patients with central nervous system injury may likewise develop critical illness polyneuropathy. In these latter patients, tendon reflexes may even be exaggerated. Recovery from critical illness polyneuropathy is usually rapid and clinically complete, although incomplete on electrodiagnostic study. Residual peripheral nerve lesion, generally of the peroneal nerve, is the most frequent feature of incomplete recovery. The need for careful electrophysiologic testing is emphasized to clarify the nature and extent of neuromuscular disturbances in critically ill patients. Failure to recognize the development of neuropathy in these patients may lead to erroneous conclusions about the ability to wean them from the ventilator.