Abstract:
OBJECTIVE:To determine which of a series of disposable or interchangeable positive end-expiratory pressure (PEEP) devices functions with the least imposition of inspiratory and expiratory work during continuous positive airway pressure. DESIGN:Prospective laboratory evaluation performed on a lung model. SETTING:Research laboratory at a university medical center. INTERVENTIONS:A spontaneously breathing lung model, created from a training test lung and a volume ventilator, were used to simulate a patient spontaneously breathing at a tidal volume of 0.4 L, peak inspiratory flow of 40 L/min, an inspiration/expiration ratio of 1:2, and a respiratory rate of 20 breaths/min. Ten PEEP valves attached to a continuous high-flow system were evaluated. MEASUREMENTS AND MAIN RESULTS:All of the PEEP valves studied imposed high levels of both inspiratory and expiratory work of breathing. The BE-171 and BE-142 valves (Instrumentation Industries) imposed the least amount of inspiratory work. In general, imposed inspiratory work accounted for approximately 70% to 80% of total imposed work of breathing. CONCLUSIONS:All of the disposable/interchangeable PEEP valves that were studied imposed a considerable amount of both inspiratory and expiratory work, even when the continuous flow provided exceeded the peak inspiratory flow demands of the lung model. The primary reason for the high imposed work levels is the high gas-flow resistance of all of the valves studied.
journal_name
Crit Care Medjournal_title
Critical care medicineauthors
Kacmarek RM,Mang H,Barker N,Cycyk-Chapman MCdoi
10.1097/00003246-199408000-00004subject
Has Abstractpub_date
1994-08-01 00:00:00pages
1219-26issue
8eissn
0090-3493issn
1530-0293journal_volume
22pub_type
杂志文章abstract:BACKGROUND:Although survival is traditionally modeled using Cox proportional hazards modeling, this approach may be inappropriate in sepsis, in which the proportional hazards assumption does not hold. Newer, more flexible models, such as Gray's model, may be more appropriate. OBJECTIVES:To construct and compare Gray's...
journal_title:Critical care medicine
pub_type: 杂志文章,多中心研究
doi:10.1097/01.ccm.0000114819.37569.4b
更新日期:2004-03-01 00:00:00
abstract:OBJECTIVES:Administration of eicosapentaenoic acid and docosahexanoic acid, omega-3 fatty acids in fish oil, has been associated with improved patient outcomes in acute lung injury when studied in a commercial enteral formula. However, fish oil has not been tested independently in acute lung injury. We therefore sought...
journal_title:Critical care medicine
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1097/CCM.0b013e318218669d
更新日期:2011-07-01 00:00:00
abstract:OBJECTIVE:To compare the effectiveness and safety of the hemoglobin-based nitric oxide scavenger, pyridoxalated hemoglobin polyoxyethylene, against placebo in patients with vasopressor-dependent distributive shock. DESIGN:Multicenter, randomized, placebo-controlled, open-label study. SETTING:Sixty-one participating I...
journal_title:Critical care medicine
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1097/CCM.0000000000000554
更新日期:2015-01-01 00:00:00
abstract:OBJECTIVES:To assess the specific host responses to systemic endotoxemia and tumor necrosis factor (TNF) activation after abdominal aortic aneurysm surgery by measuring antiendotoxin core antibodies (EndoCab) immunoglobulin (Ig)G and IgM, and soluble p55TNF receptor concentrations. The role of the gut in initiating the...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199709000-00013
更新日期:1997-09-01 00:00:00
abstract::The performance of three samples each of six brands of flow-directed pulmonary artery (PA) catheters was evaluated. In vivo studies determined the reproducibility of PA waveforms over a range of controlled heart rates when compared to those obtained from a transducer-tipped catheter. In vitro studies determined their ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198703000-00015
更新日期:1987-03-01 00:00:00
abstract:OBJECTIVES:Ethicists advise that life-sustaining treatment decisions should be made in keeping with patient preferences. Until recently, there has been little systematic study of the impact of patient preferences on the use of various life-sustaining treatments or the consequent cost of hospital care. This prospective ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199611000-00009
更新日期:1996-11-01 00:00:00
abstract::High frequency positive pressure ventilation (HFPPV) was compared with normal frequency positive pressure ventilation (NFPPV) during diagnostic fiberoptic-bronchoscopy. HFPPV was achieved by a simple modification of the Minivent, and gave satisfactory alveolar ventilation and oxygenation. In all 11 patients and over p...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:
更新日期:1982-11-01 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::Balloon flotation catheterization of the central circulation provides data which may be most meaningful and important to the management of critically ill patients. It allows the measurements of the filling pressures of the right and left ventricle as well as the cardiac output. These data combined with information con...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-197505000-00001
更新日期:1975-05-01 00:00:00
abstract:OBJECTIVES:a) To determine whether pentoxifylline has a preventive effect on the decrease in PaO2 that is caused by oleic acid, and whether pentoxifylline facilitates normalization of PaO2 from the decreased state. b) To examine whether pentoxifylline can attenuate an increase in pulmonary vascular permeability that is...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199502000-00023
更新日期:1995-02-01 00:00:00
abstract::Clinically, asystole or a bradyarrhythmia may follow countershock of ventricular fibrillation (VF) in up to 40% of attempts. This study evaluated the effects of artificial cardiac pacing, calcium chloride (CaCl2), and epinephrine in postcountershock asystole/bradycardia. Micromanometer catheters were positioned in the...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198509000-00001
更新日期:1985-09-01 00:00:00
abstract::Although systolic dysfunction of the left ventricle has been characterized in septic shock (SS) and sepsis without shock (SWS), diastolic abnormalities are less well characterized. Diastolic filling was determined using pulsed Doppler transmitral spectral tracings in 13 patients with SS, ten patients with SWS, and 33 ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199007000-00005
更新日期:1990-07-01 00:00:00
abstract::We report a case of an amniotic fluid embolism (AFE) causing a cardiorespiratory arrest associated temporally with ingestion of castor oil in a full-term normal pregnancy. Risk factors usually associated with AFE were not found in this patient. ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198806000-00016
更新日期:1988-06-01 00:00:00
abstract:OBJECTIVES:The contribution of individual immune response to Staphylococcus aureus bacteremia on outcome has not been well studied. The objective was to relate the host cytokine response to outcome of Staphylococcus aureus bacteremia. DESIGN:Prospective observational study. SETTING:Three U.S. university-affiliated me...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000001465
更新日期:2016-04-01 00:00:00
abstract:OBJECTIVES:Mechanical ventilation can cause ventilator-induced brain injury via afferent vagal signaling and hippocampal neurotransmitter imbalances. The triggering mechanisms for vagal signaling during mechanical ventilation are unknown. The objective of this study was to assess whether pulmonary transient receptor po...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000003977
更新日期:2019-11-01 00:00:00
abstract:OBJECTIVES:Extracellular mitochondrial DNA and N-formyl peptides released following tissue damage may contribute to systemic inflammation through stimulation of the innate immune system. In this review, we evaluate existing in vivo human data regarding a role for mitochondrial DNA and N-formyl peptides in producing sys...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000003381
更新日期:2018-12-01 00:00:00
abstract::We developed a method to measure accurately pressures at the airway opening (Pao) and in the trachea (Ptr) in neonates during high frequency oscillatory ventilation (HFOV) from 15-30 Hz. All component parts of the pressure-measuring system were tested as a unit against a reference transducer in a closed chamber in whi...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198401000-00011
更新日期:1984-01-01 00:00:00
abstract:OBJECTIVE:Most intensive care deaths beyond the first few days of critical illness are attributable to nonresolving organ failure, either due to or coinciding with sepsis. One of the mechanisms that is thought to contribute to the pathogenesis of organ failure is microvascular thrombosis. Recently, we reported signific...
journal_title:Critical care medicine
pub_type: 杂志文章,随机对照试验
doi:10.1097/CCM.0b013e31816f7bae
更新日期:2008-05-01 00:00:00
abstract::Thirty-three patients underwent extensive cardiorespiratory monitoring during cardiac surgery. Recordings of measurements, with derived variables, were made preoperatively, postoperatively, and after extubation approximately 3 h after operation. The data provide a reference that allows decisions on whether the conditi...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:
更新日期:1981-07-01 00:00:00
abstract::The authors determined the correction factor (Ct) for three sizes of commonly available central venous catheters. These catheters are used as the injectate catheter when a 2.5 Fr transthoracic thermistor is used to determine cardiac output by thermodilution. The valves for Ct were highly reproducible. These determinat...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198112000-00014
更新日期:1981-12-01 00:00:00
abstract:OBJECTIVE:To review the physiology of the regulation and determinants of heart rate and the significance in the management of critically ill patients. DATA SOURCES:The MEDLINE database, references from selected articles, and the author's personal database. DATA SYNTHESIS:This review begins with the regulation of card...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/CCM.0b013e318232e50c
更新日期:2012-01-01 00:00:00
abstract:OBJECTIVE:To compare the impact of two different customization strategies in the performance of the admission Mortality Probability Model II (MPM II0) using formal statistical assessment. DESIGN:Analysis of the database of a multicenter, multinational, prospective cohort study, EURICUS-1, involving 89 intensive care u...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199712000-00017
更新日期:1997-12-01 00:00:00
abstract::One hundred six early features were retrospectively collected on 44 patients with acute pancreatitis and stored in a database programmed on a microcomputer. Intraoperative/autopsy findings or clinical course categorized patients as having severe (n = 16) or mild (n = 28) pancreatitis. The frequency of 88 early availab...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198904000-00004
更新日期:1989-04-01 00:00:00
abstract:OBJECTIVE:To evaluate the physiology and pharmacokinetics of a novel hemoglobin-based oxygen carrier of bovine origin. DESIGN:Randomized, single-blind, placebo-controlled, dose-escalation study. SETTING:The Upjohn Research Clinics (Kalamazoo, MI). SUBJECTS:Normal healthy adult men between the ages of 18 and 45 yrs. ...
journal_title:Critical care medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00003246-199605000-00006
更新日期:1996-05-01 00:00:00
abstract:OBJECTIVES:In the Acute Respiratory Distress Syndrome Network randomized controlled trial, methylprednisolone treatment was associated with increased return to mechanical ventilation with partial loss of early improvements. We hypothesize a causal relationship between protocol-driven rapid discontinuation of methylpred...
journal_title:Critical care medicine
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1097/CCM.0000000000003021
更新日期:2018-06-01 00:00:00
abstract::A total of 2711 pulmonary artery wedge pressure (WP) measurement attempts were made prospectively from WP recordings in 44 (30 men) critically ill patients, using 77 flow-directed catheters. Of these, 322 (12%) failed to yield a WP measurement, and 521 (18%) were associated with technical problems. One half of these t...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198403000-00003
更新日期:1984-03-01 00:00:00
abstract:OBJECTIVES:Radiographic criteria for acute respiratory distress syndrome have been criticized for poor reliability. Our objective was to test an educational intervention to improve the radiographic identification of acute respiratory distress syndrome by participants in the Large Observational Study to Understand the G...
journal_title:Critical care medicine
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1097/CCM.0000000000003000
更新日期:2018-05-01 00:00:00
abstract:BACKGROUND:Acute lung injury (ALI) and its more severe form, acute respiratory distress syndrome (ARDS), are devastating disorders of overwhelming pulmonary inflammation and hypoxemia, resulting in high morbidity and mortality. AIM:To provide the clinician with a summary of the literature on the epidemiology, diagnosi...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/CCM.0b013e3181aee5dd
更新日期:2009-08-01 00:00:00
abstract:OBJECTIVE:To describe a case of hepatic subcapsular hematoma causing an acute Budd-Chiari-like syndrome, leading to hepatic compartment syndrome, which combines compression of intrahepatic vessels on CT, acute liver failure, and refractory shock. DESIGN:Case report. SETTING:Surgical ICU of a university teaching hospi...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000001403
更新日期:2016-03-01 00:00:00
abstract::The clearance of amikacin during hemodialysis (HD) was determined in eight critically ill patients. The dialysis period averaged 3.4 h with a blood flow of 200 ml/min. The average amikacin clearance between dialysis was 7.30 +/- 4.78 (SD) ml/min which increased to 37.5 +/- 8.01 ml/min during dialysis. The average seru...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198805000-00010
更新日期:1988-05-01 00:00:00