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 which sinusoidal pressure waves could be generated. The resulting waveforms were displayed on an oscilloscope and measured. Ptr was measured through the intramural lumen of a Hi-Lo jet tracheal tube (National Catheter Co., Argyle, NY) opening 1 cm above the distal tip. Pressure readings from uncorrected waveforms indicated a discrepancy between measured and actual pressures, as high as 100% at frequencies of 100 Hz. When the resonance of the system was damped with a CorrecTORR (Norton Health Care Products, Akron, OH), the ratio of test to reference transducer output was flat +/- 5% from 0-160 Hz for the Pao system and flat +/- 4% from 0-100 Hz for the Ptr system. Ptr system accuracy was verified in an excised rabbit lung and the systems were used clinically in neonatal HFOV. We conclude that Pao and Ptr can be measured accurately during HFOV by this method.
journal_name
Crit Care Medjournal_title
Critical care medicineauthors
Boynton BR,Mannino FL,Meathe EA,Kopotic RJ,Friederichsen Gdoi
10.1097/00003246-198401000-00011subject
Has Abstractpub_date
1984-01-01 00:00:00pages
39-43issue
1eissn
0090-3493issn
1530-0293journal_volume
12pub_type
杂志文章abstract::Critical care clinicians no longer consider family members as visitors in the intensive care unit. Family-centered care has emerged from the results of qualitative and quantitative studies evaluating the specific needs of families of patients dying in the intensive care unit. In addition, interventional studies have e...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/01.CCM.0000237049.44246.8C
更新日期:2006-11-01 00:00:00
abstract:OBJECTIVE:To determine the incidence and risk factors of chronic critical illness after severe blunt trauma. DESIGN:Prospective observational cohort study (NCT01810328). SETTING:Two level-one trauma centers in the United States. PATIENTS:One hundred thirty-five adult blunt trauma patients with hemorrhagic shock who ...
journal_title:Critical care medicine
pub_type: 杂志文章,多中心研究
doi:10.1097/CCM.0000000000002697
更新日期:2017-12-01 00:00:00
abstract:OBJECTIVE:Acute aneurysmal subarachnoid hemorrhage (SAH) is a complex multifaceted disorder that plays out over days to weeks. Many patients with SAH are seriously ill and require a prolonged intensive care unit stay. Cardiopulmonary complications are common. The management of patients with SAH focuses on the anticipat...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/CCM.0b013e318195865a
更新日期:2009-02-01 00:00:00
abstract::The relationship between oxygen uptake (Vo2) and delivery (Do2) was examined in 64 patients immediately after cardiopulmonary bypass. In 44 patients with lactate levels below 2.5 mmol/L, Vo2 decreased proportionally when Do2 decreased below 300 ml/min X m2. At a Do2 over this level, Vo2 plateaued at 105 +/- 13 (SD) ml...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198703000-00002
更新日期:1987-03-01 00:00:00
abstract::Twenty preterm infants in respiratory distress, each with an umbilical catheter in place, were studied during their first 24 h of hospitalization, to determine the effects of continuous transcutaneous oxygen (PtcO2) monitoring on the frequency of arterial blood gas (ABG) determinations and on the incidence of hypoxia ...
journal_title:Critical care medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00003246-198402000-00009
更新日期:1984-02-01 00:00:00
abstract::The effects of hypertonic mannitol on postischemic cerebral circulation were studied in 20 dogs. Mannitol, 2 g/kg iv, was infused into ten dogs during a 2-h period starting 1.5 h after 6 min of complete cerebral ischemia. One hour postischemia, regional cerebral blood flow (rCBF) was 36% in the control group (ten dogs...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198607000-00010
更新日期:1986-07-01 00:00:00
abstract::The focus on improving education in critical care medicine must begin early in medical school training and further be promoted during residency if there is to be an increase in intensivists in the hospital workforce. This is "critical" to healthcare reform movements that are endorsing full-time critical care coverage ...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:10.1097/01.CCM.0000252917.25301.18
更新日期:2007-02-01 00:00:00
abstract::Reproducibility of thermal-dye extravascular lung water (EVLW) estimation by a lung water computer was studied by performing ten consecutive measurements in 45 critically ill patients. EVLW ranged over a wide spectrum from 187 to 1163 ml (2.4 to 18.6 ml/kg). The mean coefficient of variation of ten consecutive measure...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198706000-00014
更新日期:1987-06-01 00:00:00
abstract:OBJECTIVE:Anemia increases risk of bleeding complications in the critically ill. In primary intracerebral hemorrhage (ICH), the most fatal type of stroke, outcome is largely dependent on the volume of hemorrhage into the brain. We investigated the relationship between anemia and clinical course of acute ICH. METHODS:S...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e31819ced3a
更新日期:2009-04-01 00:00:00
abstract:OBJECTIVE:To examine the accuracy of brain multimodal monitoring-consisting of intracranial pressure, brain tissue PO2, and cerebral microdialysis--in detecting cerebral hypoperfusion in patients with severe traumatic brain injury. DESIGN:Prospective single-center study. PATIENTS:Patients with severe traumatic brain ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000000720
更新日期:2015-02-01 00:00:00
abstract:OBJECTIVE:The physicochemical approach, described by Stewart to investigate the acid-base balance, includes the strong ion gap (SIG), a quantitative measure of "unmeasured" anions, which strongly correlates to the corrected anion gap. The chemical nature of these anions is for the most part unknown. We hypothesized tha...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0B013E31816443CB
更新日期:2008-03-01 00:00:00
abstract:OBJECTIVES:Reviews of patient safety efforts suggest that technical/administrative change must be augmented by global factors such as organizational culture and climate. The objective was to outline a comprehensive model for healthcare climate and test one of its elements, the nursing subclimate, in terms of several pa...
journal_title:Critical care medicine
pub_type: 杂志文章,多中心研究
doi:10.1097/01.CCM.0000262404.10203.C9
更新日期:2007-05-01 00:00:00
abstract:OBJECTIVE:To improve control of blood glucose concentrations in critically ill patients through use of a bedside, nurse-managed, intravenous insulin nomogram. DESIGN:Retrospective, before-after cohort study. SETTING:Fifteen-bed mixed medical/surgical intensive care unit in a tertiary, teaching hospital. PATIENTS:A t...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-200109000-00010
更新日期:2001-09-01 00:00:00
abstract:OBJECTIVE:Procalcitonin may be associated with reduced antibiotic usage compared to usual care. However, individual randomized controlled trials testing this hypothesis were too small to rule out harm, and the full cost-benefit of this strategy has not been evaluated. The purpose of this analysis was to evaluate the ef...
journal_title:Critical care medicine
pub_type: 杂志文章,meta分析,评审
doi:10.1097/CCM.0b013e31821201a5
更新日期:2011-07-01 00:00:00
abstract:OBJECTIVES:We aimed to implement our Smart Use of Antibiotics Program to ensure the proper use of antimicrobials, improve patient care and outcomes, and reduce the risks of adverse effects and antimicrobial resistance. DESIGN:We compared the time periods before (baseline) and after (intervention) the implementation of...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000003463
更新日期:2019-01-01 00:00:00
abstract:OBJECTIVE:To characterize the withholding or withdrawing of life support from patients with severe head injury. SETTING:San Francisco General Hospital, a city and county hospital with a Level I trauma center. DESIGN:A standardized questionnaire was used to collect data on demographics and functional outcome of severe...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199509000-00018
更新日期:1995-09-01 00:00:00
abstract:OBJECTIVES:The mortality outcome of mechanical ventilation, a key intervention in the critically ill, has been variously reported to be determined by intensive care patient volume. We determined the volume-(mortality)-outcome relationship of mechanically ventilated patients whose records were contributed to the Austral...
journal_title:Critical care medicine
pub_type: 杂志文章,多中心研究
doi:10.1097/CCM.0b013e318236f2af
更新日期:2012-03-01 00:00:00
abstract:OBJECTIVES:Palliative care is now recognized as an essential component of comprehensive care in serious illness that interferes with quality of life. We explored utilization of palliative care in spontaneous intracerebral hemorrhage at a population level using a large national database. DESIGN:Population based cross-s...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000001391
更新日期:2016-03-01 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:OBJECTIVES:To create a novel tool to predict favorable neurologic outcomes during ICU stay among children with critical illness. DESIGN:Logistic regression models using adaptive lasso methodology were used to identify independent factors associated with favorable neurologic outcomes. A mixed effects logistic regressio...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000002753
更新日期:2018-01-01 00:00:00
abstract:OBJECTIVE:To compare four different methods of endotracheal lidocaine administration with respect to the site of administration. DESIGN:Randomized controlled trial. SETTING:University hospital. PATIENTS:Thirty-two female patients (43.6 +/- 11.5 years old) undergoing elective gynecologic operations with an anesthesio...
journal_title:Critical care medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1097/00003246-199107000-00015
更新日期:1991-07-01 00:00:00
abstract::Recent advances in prenatal and neonatal care have increased the number of live births and extended the life expectancy of critically ill premature infants. These infants represent a formidable therapeutic challenge in that multisystem involvement and previously uncommon conditions, such as intravascular coagulation, ...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-197701000-00007
更新日期:1977-01-01 00:00:00
abstract:OBJECTIVE:Head-to-head comparison of the success rate of jejunal placement of a new electromagnetically visualized jejunal tube with that of the endoscopic technique in critically ill patients. DESIGN:: Prospective, randomized clinical trial. SETTING:Two intensive care units at a university hospital. PATIENTS:: A to...
journal_title:Critical care medicine
pub_type: 杂志文章,随机对照试验
doi:10.1097/CCM.0b013e3181fb7b5f
更新日期:2011-01-01 00:00:00
abstract:OBJECTIVE:Families and other surrogate decisionmakers for chronically critically ill patients often lack information about patient prognosis or options for care. This study describes an approach to develop and validate a printed information brochure about chronic critical illness aimed at improving comprehension of the...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0b013e31822d7901
更新日期:2012-01-01 00:00:00
abstract::High-risk patients who survived general (noncardiac) surgery were observed to have cardiac index (CI) values averaging 4.5 L/min.m2, oxygen delivery (DO2) greater than 600 ml/min.m2, and oxygen consumption (VO2) 170 ml/min.m2 during the first 2 or three days postoperatively. Patients who subsequently died maintained r...
journal_title:Critical care medicine
pub_type: 杂志文章,评审
doi:
更新日期:1990-01-01 00:00:00
abstract:OBJECTIVE:To characterize the endothelium-dependent and endothelium-independent components of abnormal pulmonary vascular tone in canine oleic acid lung injury. DESIGN:Prospective, interventional study. SETTING:University laboratory. SUBJECTS:Twenty anesthetized mongrel dogs. INTERVENTIONS:Right heart catheterizati...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-200207000-00028
更新日期:2002-07-01 00:00:00
abstract::Sequential assessment of renal function in 50 critically ill postoperative patients was done by simultaneous determinants of osmolar, free water, creatinine and sodium clearances, and fractional excretion of sodium. The traumatic and nontraumatic critically ill surgical patients had a characteristic pattern of creatin...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-198002000-00004
更新日期:1980-02-01 00:00:00
abstract:OBJECTIVE:To determine the role of serum albumin concentration as a predictor of mechanical ventilation dependency. DESIGN:Prospective, observation trial. SETTING:Multidisciplinary intensive care unit (ICU) in a university hospital. PATIENTS:One hundred forty-five consecutive patients who required mechanical ventila...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/00003246-199604000-00009
更新日期:1996-04-01 00:00:00
abstract:OBJECTIVES:To determine the proportion of patients with documented bacterial aspiration pneumonia among comatose ICU patients with symptoms suggesting either bacterial aspiration pneumonia or non-bacterial aspiration pneumonitis. DESIGN:Prospective observational study. SETTING:University-affiliated 30-bed ICU. PATIE...
journal_title:Critical care medicine
pub_type: 杂志文章
doi:10.1097/CCM.0000000000002525
更新日期:2017-08-01 00:00:00
abstract:OBJECTIVE:To compare the ability of two methods--Acute Physiology and Chronic Health Evaluation (APACHE II) and Mortality Prediction Model (MPM)--to predict hospital outcome for a large group of intensive care patients from Britain and Ireland. DESIGN:Prospective, multicenter, cohort study. SETTING:Twenty-six general...
journal_title:Critical care medicine
pub_type: 杂志文章,多中心研究
doi:10.1097/00003246-199409000-00007
更新日期:1994-09-01 00:00:00