Abstract:
OBJECTIVES:a) To investigate whether the patient work of breathing needed to trigger inspiration is affected by the type of ventilator delivering pressure-support ventilation for mechanically ventilated pediatric patients. b) To determine whether changes in oxygen consumption (VO2) trend with changes in work of breathing and would thus be helpful in tracking work of breathing. DESIGN:Prospective study. SETTING:Pediatric intensive care unit at a university hospital. PATIENTS:Nine mechanically ventilated patients (2 to 75 months of age). INTERVENTIONS:While maintaining a constant pressure-support ventilation level, patients were alternately supported with the Siemens Servo 900C, the Bird VIP, and the Newport Wave E200 ventilators in random order. MEASUREMENTS AND MAIN RESULTS:Work of breathing, defined as the integral of the pressure-volume curve corresponding to negative pressure, was calculated with a pulmonary monitoring system. VO2 was measured with a metabolic cart. Patient distress levels were assessed using the COMFORT scale, a behavioral scoring system. Mean values (20 breaths/patient) for measured variables with each ventilator were compared using analysis of variance and Scheffé tests, with p < .05 indicating statistical significance. The lowest VO2 (103 +/- 35 mL/min/m2) and work of breathing (24 +/- 15 g.cm/m2) were achieved with the Bird VIP ventilator and were significantly (p < .05) lower than those values obtained with either the Siemens Servo 900C (VO2 147 +/- 33 mL/min/m2; work of breathing 49 +/- 18 g.cm/m2) or the Newport Wave E200 (VO2 122 +/- 33 mL/min/m2; work of breathing 35 +/- 15 g.cm/m2). Also, the values of work of breathing and VO2 obtained using the Newport Wave E200 were significantly (p < .05) lower than those values obtained using the Servo 900C. No change in behavioral distress occurred when the ventilators were changed. In all patients, there was a clear similarity in the trends of VO2 and work of breathing. CONCLUSIONS:We conclude that VO2 and work of breathing may be reduced significantly using the latest generation of mechanical ventilators optimized for infant and pediatric use. Because work of breathing is less with the Bird VIP than the other two ventilators tested, leading to a corresponding decrease in VO2, we suggest that the Bird VIP better adapts the patient to the ventilator and may facilitate weaning from ventilatory support. We also suggest that changes in VO2 might be helpful in tracking changes in work of breathing.
journal_name
Crit Care Medjournal_title
Critical care medicineauthors
el-Khatib MF,Chatburn RL,Potts DL,Blumer JL,Smith PGsubject
Has Abstractpub_date
1994-12-01 00:00:00pages
1942-8issue
12eissn
0090-3493issn
1530-0293journal_volume
22pub_type
临床试验,杂志文章,随机对照试验abstract:OBJECTIVE:To describe the incidence of non-neurologic organ dysfunction and its association with outcome in patients with severe traumatic brain injury admitted to intensive care. DESIGN:Observational cohort study. SETTING:Foothills Medical Centre, which is the only neurosurgical service in southern Alberta (populati...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/01.ccm.0000155911.01844.54
更新日期:2005-03-01 00:00:00
abstract:OBJECTIVE:Adrenal failure is common in critically ill patients, particularly those with sepsis. As liver failure and sepsis are both associated with increased circulating levels of endotoxin and proinflammatory mediators and reduced levels of apoprotein-1/high-density lipoprotein, we postulated that adrenal failure may...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/01.ccm.0000164541.12106.57
更新日期:2005-06-01 00:00:00
abstract:OBJECTIVES:Approximately one in every four patients who present to the emergency department with sepsis progresses to septic shock within 72 hours of arrival. In this study, we describe key patient characteristics present within 4 hours of emergency department arrival that are associated with developing septic shock be...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000000861
更新日期:2015-05-01 00:00:00
abstract:INTRODUCTION:Ventilator settings for patients with severe acute respiratory distress syndrome supported by venovenous extracorporeal membrane oxygenation are currently set arbitrarily. The impact on serum and pulmonary biotrauma markers of the transition to ultra-protective ventilation settings following extracorporeal...
journal_title:Critical care medicine
pub_type: 杂志文章,随机对照试验
doi:10.1097/CCM.0000000000003894
更新日期:2019-11-01 00:00:00
abstract:BACKGROUND:One form of sepsis, or endotoxic shock, is a hyperactivated systemic response caused by excessive expression of proinflammatory mediators, which results from Gram-negative bacterial lipopolysaccharide-stimulated Toll-like receptor-4 signaling. This lipopolysaccharide signaling is known to consist of a MyD88-...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e318236ef8b
更新日期:2012-03-01 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:OBJECTIVE:To investigate a role of the opiate system during acute hypoxic hypoxia, the effects of naloxone and morphine on hypoxic survival rate were investigated in awake adult mice. DESIGN:Prospective, randomized, animal trial. SETTING:University research laboratory. SUBJECTS:Male dd-Y mice (n = 864 in experiment ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199909000-00035
更新日期:1999-09-01 00:00:00
abstract:OBJECTIVE:To determine if exogenous interleukin (IL)-10 will decrease the morbidity or mortality of sepsis induced by cecal ligation and puncture. DESIGN:Prospective, randomized, controlled study. SETTING:University research laboratory. SUBJECTS:Adult, female, Balb¿c mice. INTERVENTIONS:Balb¿c mice were subjected t...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199805000-00025
更新日期:1998-05-01 00:00:00
abstract:OBJECTIVE:The neuroprotective effects of the noble gas xenon are well known. Argon, in contrast to xenon, is abundant, inexpensive, and therefore widely applicable. In this study, we analyzed the possible neuroprotective role of argon in an in vivo rat model of acute focal cerebral ischemia. DESIGN:Controlled laborato...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e31821209be
更新日期:2011-06-01 00:00:00
abstract::A closed system device with teflon needle, sideholes, and attached stopcock was designed and evaluated for diagnosis and evacuation of neonatal pneumothoraces. Experience with this device has demonstrated specific advantages over existing needles and techniques. Since the system is airtight, diagnosis of pneumothorax ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-197811000-00007
更新日期:1978-11-01 00:00:00
abstract::An emergency cricothyrotomy device was placed in 11 anesthetized dogs in order to assess airway damage and problems in placement, ventilation, and design. Posterior airway perforation without esophageal damage occurred in three animals. Submucosal hematomas or cricoid cartilage injury occurred in seven animals. As pla...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198702000-00016
更新日期:1987-02-01 00:00:00
abstract:OBJECTIVES:To describe the timing of onset of organ system failure, multiple organ system failure diagnosis, and the subsequent death in children admitted to a pediatric intensive care unit (ICU). Second, to identify independent risk markers of death in pediatric patients with multiple organ system failure. DESIGN:Rev...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199406000-00023
更新日期:1994-06-01 00:00:00
abstract::The pericardium serves many important functions, but it is not essential for life. Pericardial heart disease comprises only pericarditis and its complications, tamponade and constriction, and congenital lesions. However, the pericardium is affected by virtually every category of disease. The critical care physician is...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/01.CCM.0000271159.84639.2B
更新日期:2007-08-01 00:00:00
abstract:OBJECTIVES:Severe sepsis poses a major burden on the U.S. healthcare system. Previous epidemiologic studies have not differentiated community-acquired severe sepsis from healthcare-associated severe sepsis or hospital-acquired severe sepsis hospitalizations. We sought to compare and contrast community-acquired severe s...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000001164
更新日期:2015-09-01 00:00:00
abstract:OBJECTIVE:To evaluate the hypothesis that splanchnic ischemia and mucosal hypoxia are responsible for lipopolysaccharide-induced intramucosal acidosis in pigs. DESIGN:Prospective, randomized, unblinded study. SETTING:Surgical research laboratory at a large, university-affiliated medical center. SUBJECTS:Anesthetized...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199507000-00011
更新日期:1995-07-01 00:00:00
abstract:OBJECTIVES:To investigate aortic functional alterations in the acute phase of aneurysmal subarachnoid hemorrhage and to evaluate the relationship between potential cardiovascular alterations and delayed cerebral infarctions or poor Glasgow Outcome Scale score at discharge from critical care unit. DESIGN:Prospective ob...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e31822e9fab
更新日期:2012-01-01 00:00:00
abstract:OBJECTIVE:During pressure support ventilation, ventilator inspiration ends when inspiratory flow drops to a given percentage of the peak inspiratory flow cycling-off criteria. This study evaluated the effect of two different cycling-off criteria on breathing pattern, respiratory effort, and gas exchange in patients wit...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/01.CCM.0000287594.80110.34
更新日期:2007-11-01 00:00:00
abstract:OBJECTIVE:To compare measurement of cardiac output by the CO2 rebreathing method vs. the thermodilution cardiac output technique in the setting of acute respiratory failure in patients with chronic obstructive pulmonary disease. DESIGN:Prospective, comparative study of two methods in a consecutive sample. SETTING:Int...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199401000-00017
更新日期:1994-01-01 00:00:00
abstract:OBJECTIVE:To review the incidence, diagnosis, and management of septic emboli caused by vascular catheters after surgery for congenital heart disease. DESIGN:Retrospective clinical review. All patients were computer registered. Our database includes daily follow-up and every sign of infection registered. SETTING:Pedi...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-200003000-00039
更新日期:2000-03-01 00:00:00
abstract:OBJECTIVE:To review how endogenous protein C activation might change in disease states and to discuss the implications of these findings in the context of severe sepsis. DATA SOURCE:A review of the published literature in PubMed together with data from abstracts from 2001 to present. DATA EXTRACTION AND SYNTHESIS:Act...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/01.ccm.0000126125.79861.d3
更新日期:2004-05-01 00:00:00
abstract:OBJECTIVES:Case fatality in pregnancy-associated severe sepsis or septic shock appears reduced compared with nonpregnant women with severe sepsis or septic shock. It remains unclear if this difference is due to pregnancy or better baseline health status, among others. Our study compared adverse outcomes of pregnancy-as...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000003348
更新日期:2018-11-01 00:00:00
abstract:OBJECTIVE:Increasing evidence, including publication of the Transfusion Requirements in Critical Care trial in 1999, supports a lower hemoglobin threshold for RBC transfusion in ICU patients. However, little is known regarding the influence of this evidence on clinical practice over time in a large population-based coh...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e31828e9a49
更新日期:2013-10-01 00:00:00
abstract:OBJECTIVES:To assess the impact of the percentage of fluid infused as Lactated Ringer (%LR) during the first 2 days of ICU admission in hospital mortality and occurrence of acute kidney injury. DESIGN:Retrospective cohort. SETTING:Analysis of a large public database (Multiparameter Intelligent Monitoring in Intensive...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000001948
更新日期:2016-12-01 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:Trauma induces a complex immune response that requires a systems biology research approach. Here, we used a novel technology, mass cytometry by time-of-flight, to comprehensively characterize the multicellular response to trauma. DESIGN:Peripheral blood mononuclear cells samples were stained with a 38-marker...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000002577
更新日期:2017-09-01 00:00:00
abstract::Last year, >28,000 people received organ transplants from >14,000 donors in the United States. Unfortunately, the wait list now tops 91,000, with the gap between recipient needs and available donor organs at around 60,000. This has motivated a host of efforts to increase organ supply, including driver's license and do...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/01.CCM.0000252915.76019.19
更新日期:2007-02-01 00:00:00
abstract:OBJECTIVE:To determine if autopsies performed on patients who die in the medical intensive care unit (ICU) provide clinically important new information. DESIGN:Retrospective review. SETTING:A 16-bed medical-coronary ICU. PATIENTS:Patients who underwent autopsy during a 1-yr period. INTERVENTIONS:Pre mortem diagnose...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199808000-00015
更新日期:1998-08-01 00:00:00
abstract:OBJECTIVE:A hallmark of amniotic fluid embolism is the induction of coagulation defects. Little is known about the nature of these defects or the causative agent or agents. The purpose of this study was to assess the effects of meconium containing (native) meconium-amniotic-fluid infusion (MAFI) and meconium-free (cent...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199902000-00042
更新日期:1999-02-01 00:00:00
abstract:OBJECTIVE:To determine whether peptic activity in bronchoalveolar fluid, due to the presence of the gastric proteolytic enzyme pepsin, could serve as a biochemical marker for pulmonary aspiration of gastric contents. DESIGN:Prospective, experimental trial. SETTING:A university animal research laboratory. SUBJECTS:Th...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199611000-00019
更新日期:1996-11-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to evaluate the effect of a neutrophil elastase inhibitor, sivelestat, on lipopolysaccharide-induced acute lung injury through analysis of hemodynamic changes in the pulmonary microcirculation. DESIGN:Randomized animal study. SETTING:Medical school laboratory. SUBJECTS:Twenty-...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/01.ccm.0000172547.54086.ad
更新日期:2005-08-01 00:00:00