Abstract:
OBJECTIVE:To systematically investigate the effect of altering release time during airway pressure release ventilation in a neonatal animal model before and after oleic acid-induced acute lung injury. DESIGN:Prospective, nonrandomized, controlled study with repeated measures. SETTING:University research laboratory. SUBJECTS:Eight neonatal sheep (aged < 7 days, weight 5.1 +/- 0.3 kg). INTERVENTIONS:Throughout this study, airway pressure release ventilation was performed with an FIO2 of 0.21 at a frequency of 0.5 Hz (30 breaths/min) and an airway plateau pressure set to deliver tidal volumes between 10 and 15 mL/kg with a release time of 1 sec. Release time was changed in decrements of 0.2 sec starting at 1 sec and ending at 0.2 sec at 10-min intervals. Cardio-respiratory profiles were recorded at the end of each interval. The total exhaled respiratory system time constant (tau) was measured by plotting exhaled volume (integration of exhaled air flow) vs. time. Acute lung injury was induced by oleic acid infusion. The protocol was repeated with increased plateau airway pressure to maintain tidal volumes between 10 and 15 mL/kg at a release time of 1 sec. MEASUREMENTS AND MAIN RESULTS:During airway pressure release ventilation at a release time of 1 sec, oleic acid-induced acute lung injury decreased dynamic lung compliance (9.9 +/- 2.2 vs. 7.5 +/- 2.0 mL/cm H2O, p < .01), the expiratory time constant (0.15 +/- 0.04 vs. 0.12 +/- 0.02 sec, p < .05), and mean arterial pressure (80 +/- 5 vs. 62 +/- 12 mm Hg, p < .01). Alveolar ventilation was maintained as long as release times were > 0.4 sec (approximately 3 tau or greater). PaO2 decreased with release times of < 0.3 sec, but the alveolar-arterial oxygen tension difference was unchanged. In this protocol, with higher plateau and mean airway pressures, oleic acid-induced acute lung injury had no effect on the relationship between release time and oxygenation or ventilation. CONCLUSIONS:In this neonatal laboratory model, release times that were much shorter than previously reported maintained clinically acceptable oxygenation and ventilation. The optimal duration of the release time is a function of the time constant of the respiratory system. During airway pressure release ventilation, alveolar ventilation was maintained without apparent lung volume loss with release times of between 4 tau and 10 tau.
journal_name
Crit Care Medjournal_title
Critical care medicineauthors
Martin LD,Wetzel RCdoi
10.1097/00003246-199403000-00020subject
Has Abstractpub_date
1994-03-01 00:00:00pages
486-93issue
3eissn
0090-3493issn
1530-0293journal_volume
22pub_type
杂志文章abstract:OBJECTIVES:To compare the frequency and preventability of adverse drug events and potential adverse drug events in intensive care units (ICUs) and non-ICUs. To evaluate systems factors involving the individual caregivers, care unit teams, and patients involved in each adverse drug event by comparing ICUs with non-ICUs ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199708000-00014
更新日期:1997-08-01 00:00:00
abstract:OBJECTIVE:To test the hypothesis that a pretransport Pediatric Risk of Mortality (PRISM) score underestimates the requirement for both intensive care and interventions during pediatric interhospital transport. DESIGN:Prospective, descriptive study. SETTING:All children were treated in a regional hospital and then tra...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199401000-00020
更新日期:1994-01-01 00:00:00
abstract:OBJECTIVE:To identify factors associated with granting or refusing intensive care unit (ICU) admission, to analyze ICU characteristics and triage decisions, and to describe mortality in admitted and refused patients. DESIGN:Observational, prospective, multiple-center study. SETTING:Four university hospitals and seven...
journal_title:Critical care medicine
pub_type: 杂志文章,多中心研究
doi:10.1097/01.ccm.0000157752.26180.f1
更新日期:2005-04-01 00:00:00
abstract::Conventional wisdom suggests that the "human factor" in critical care environments is reason for inadequate medication and patient safety. "Human factors" (or human factors engineering) is also a scientific discipline and practice of improving human performance. Using decades of human factors research, this paper eval...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e3181dd8de2
更新日期:2010-06-01 00:00:00
abstract:OBJECTIVE:To assess the impact of sepsis classification and multidrug-resistance status on outcome in patients receiving appropriate initial antibiotic therapy. DESIGN:A retrospective cohort study. SETTING:Barnes-Jewish Hospital, a 1,250-bed teaching hospital. PATIENTS:Individuals with Enterobacteriaceae sepsis, sev...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000001013
更新日期:2015-08-01 00:00:00
abstract:OBJECTIVES:Previous studies in adults suggest that various types of physiologic stress appear to decrease phagocytic cell function. Adherence and chemotaxis of, and phagocytosis and bacterial killing by, neonatal neutrophils are altered compared with adult neutrophil function. Stresses encountered by the fetus and neon...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199312000-00022
更新日期:1993-12-01 00:00:00
abstract:OBJECTIVE:End-of-life practices vary worldwide. The objective was to demonstrate that there is no clear-cut distinction between treatments administered to relieve pain and suffering and those intended to shorten the dying process. DESIGN:Secondary analysis of a prospective, observational study. SETTING:Thirty-seven i...
journal_title:Critical care medicine
pub_type: 杂志文章,多中心研究
doi:10.1097/01.CCM.0000295304.99946.58
更新日期:2008-01-01 00:00:00
abstract:OBJECTIVE:To evaluate if the up-regulation of vascular endothelial growth factor strengthens the protective effect of amniotic fluid stem cells in a renal ischemia-reperfusion injury model. DESIGN:Randomized animal study. SETTINGS:University research laboratory. SUBJECTS:A total of 40 males 12-week-old Wistar rats w...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000002020
更新日期:2017-01-01 00:00:00
abstract:OBJECTIVE:After a stay in the intensive care unit, patients risk experiencing delusional memories, memory loss, and symptoms of posttraumatic stress. Since the 1990s, diaries have been kept for intensive care unit patients to help fill in memory gaps, aid psychosocial recovery, and improve health-related quality of lif...
journal_title:Critical care medicine
pub_type: 杂志文章,多中心研究
doi:10.1097/CCM.0b013e31821e89c8
更新日期:2011-08-01 00:00:00
abstract::Gastric mucosal damage produced by topical application of necrotizing agents is diminished by topical or systemic pretreatment with a variety of E and F prostaglandins. The rat restraint model of gastric mucosal injury is more analogous to clinical stress ulceration than are models using intragastric application of to...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198901000-00011
更新日期:1989-01-01 00:00:00
abstract::The intensive care unit (ICU) represents a hospital setting in which death and discussion about end-of-life care are common, yet these conversations are often difficult. Such difficulties arise, in part, because a family may be facing an unexpected poor prognosis associated with an acute illness or exacerbation and, i...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/00003246-200102001-00006
更新日期:2001-02-01 00:00:00
abstract::Estimations of blood glucose in the range 0-80 mg/dl were performed using the Chemstrip bG and StatTek Glucose Low Level test strips. Estimations of glucose levels closely approximated values obtained by a quantitative, enzymatic reference method; both appear to be excellent screening tests for hypoglycemia. There wer...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:
更新日期:1983-04-01 00:00:00
abstract:OBJECTIVE:Cerebral perfusion pressure<40 mm Hg following pediatric traumatic brain injury has been associated with increased mortality independent of age, and current guidelines recommend maintaining cerebral perfusion pressure between 40 mm Hg-60 mm Hg. Although adult traumatic brain injury studies have observed an in...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e31825333e6
更新日期:2012-08-01 00:00:00
abstract:OBJECTIVES:The results from the recent Targeted Temperature Management trial raised the question whether cooling or merely the avoidance of fever mediates better neurologic outcome in resuscitated patients. As temperature per se is a major determinant of cardiac function, we characterized the effects of hyperthermia (4...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000001358
更新日期:2016-03-01 00:00:00
abstract:OBJECTIVE:This article analyzes, from a legal perspective, a recent phenomenon involving a clash between the values of attending medical personnel and the instructions of surrogate decision-makers acting on behalf of incompetent patients. Some hospitals have gone to court to challenge decisions by surrogates to continu...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/00003246-199605000-00026
更新日期:1996-05-01 00:00:00
abstract:OBJECTIVE:This study tested the hypothesis that intra-coronary transfusion of circulation-derived autologous CD34+ cells can improve ischemia-related left ventricular dysfunction in patients with severe diffuse coronary artery disease refractory to medication and unsuitable for coronary intervention. DESIGN:A prospect...
journal_title:Critical care medicine
pub_type: 杂志文章,随机对照试验
doi:10.1097/CCM.0000000000001138
更新日期:2015-10-01 00:00:00
abstract:OBJECTIVE:To determine the association of gender with the presentation, outcome, and host response in critically ill patients with sepsis. DESIGN AND SETTING:A prospective observational cohort study in the ICU of two tertiary hospitals between January 2011 and January 2014. PATIENTS:All consecutive critically ill pat...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000002649
更新日期:2017-11-01 00:00:00
abstract:OBJECTIVE:To examine the association between the performance of a tracheostomy and intensive care unit and postintensive care unit mortality, controlling for treatment selection bias and confounding variables. DESIGN:Prospective, observational, cohort study. SETTING:Twelve French medical or surgical intensive care un...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/01.CCM.0000251134.96055.A6
更新日期:2007-01-01 00:00:00
abstract:OBJECTIVE:To determine the functionality of identified polymorphisms in the promoter and upstream regions of the interleukin-10 gene in terms of release of interleukin-10 from lipopolysaccharide-stimulated whole blood from healthy volunteers and to evaluate the relationship of interleukin-10 polymorphisms to interleuki...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-200301000-00005
更新日期:2003-01-01 00:00:00
abstract::Pentoxifylline has been shown to increase red blood cell malleability, thus increasing capillary blood flow in a number of disease states. The present study was undertaken to determine whether pentoxifylline might improve tissue oxygenation after anesthesia and during an operation in rats. Rats were anesthetized and d...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198702000-00001
更新日期:1987-02-01 00:00:00
abstract::A simple, safe, and effective system for umbilical artery monitoring controls continuous fluid infusion to prevent fluid overinfusion and keep the catheter from clotting. Accurate and continuous pressure measurements can be recorded simultaneously with fluid infusion. A convenient method for checking dynamic response ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198207000-00009
更新日期:1982-07-01 00:00:00
abstract:OBJECTIVES:There is limited evidence supporting the widespread use of α2 agonists (clonidine and dexmedetomidine) in pediatric critical care sedation. This study sought to test the association between the use of α2 agonists and enhanced sedation. DESIGN:A retrospective observational cohort study was conducted. Noninfe...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000003789
更新日期:2019-07-01 00:00:00
abstract:OBJECTIVE:Prolonged stay in the intensive care unit (ICU) is associated with high mortality, morbidity, and costs. Identifying those patients who are most likely to benefit from an extended ICU stay would be helpful in guiding clinical decisions. We sought to describe the characteristics and outcomes for a heterogeneou...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/01.ccm.0000178184.97813.52
更新日期:2005-09-01 00:00:00
abstract:OBJECTIVES:To determine bronchoalveolar lavage (BAL) fluid concentrations of keratinocyte growth factor (KGF) and hepatocyte growth factor (HGF), two potent growth factors for alveolar type II epithelial cells, in patients with acute respiratory distress syndrome (ARDS). DESIGN:Prospective study. SETTING:An adult tra...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-200007000-00024
更新日期:2000-07-01 00:00:00
abstract::The EEGs of 40 infants paralyzed with D-tubocurarine or pancuronium during the neonatal period were reviewed retrospectively. The 23 infants who survived were re-examined at 1-3 yr of age. Sixteen infants had normal or mildly abnormal EEGs in the neonatal period; 3 died of nonneurologic causes; the remainder were norm...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198312000-00004
更新日期:1983-12-01 00:00:00
abstract:OBJECTIVE:To investigate the mechanism by which methylprednisolone protects the liver from hypoxia-induced injury. DESIGN:Prospective control study using the isolated rat liver. SETTING:Animal research facility. SUBJECTS:Male, fasted, pathogen-free Sprague-Dawley rats. INTERVENTIONS:Low-flow hypoxia was produced by...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/01.CCM.0000066176.49774.CC
更新日期:2003-05-01 00:00:00
abstract::Vecuronium's short half-life and minimal cardiopulmonary side-effects make it a suitable drug for continuous infusion. Vecuronium is used frequently in critically ill patients to increase their total compliance and to minimize the adverse effects of mechanical ventilation. This crossover, prospective study evaluates t...
journal_title:Critical care medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00003246-198910000-00004
更新日期:1989-10-01 00:00:00
abstract:OBJECTIVE:To compare the classification performance of the Revised Atlanta Classification, the Determinant-Based Classification, and a new modified Determinant-Based Classification according to observed mortality and morbidity. DESIGN:A prospective multicenter observational study conducted in 1-year period. SETTING:F...
journal_title:Critical care medicine
pub_type: 杂志文章,多中心研究
doi:10.1097/CCM.0000000000001565
更新日期:2016-05-01 00:00:00
abstract:OBJECTIVES:Vital organ hypoperfusion significantly contributes to the dismal survival rates observed with manual cardiopulmonary resuscitation after cardiac arrest. The impedance threshold device is a valve which reduces air entry into lungs during chest recoil between chest compressions, producing a potentially benefi...
journal_title:Critical care medicine
pub_type: 杂志文章,meta分析
doi:10.1097/CCM.0b013e318170ba80
更新日期:2008-05-01 00:00:00
abstract:OBJECTIVE:To determine if there is a difference in nosocomial pneumonia frequency rate in mechanically ventilated trauma patients treated with sucralfate vs. ranitidine for stress ulcer prophylaxis. DESIGN:Prospective, randomized trial. SETTING:A 640-bed urban teaching hospital and trauma center. PATIENTS:Ninety-two...
journal_title:Critical care medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00003246-199312000-00012
更新日期:1993-12-01 00:00:00