Abstract:
PURPOSE:Limited data exist on the correlation between higher flow rates of high-flow nasal cannula (HFNC) and its physiologic effects in patients with acute hypoxemic respiratory failure (AHRF). We assessed the effects of HFNC delivered at increasing flow rate on inspiratory effort, work of breathing, minute ventilation, lung volumes, dynamic compliance and oxygenation in AHRF patients. METHODS:A prospective randomized cross-over study was performed in non-intubated patients with patients AHRF and a PaO2/FiO2 (arterial partial pressure of oxygen/fraction of inspired oxygen) ratio of ≤300 mmHg. A standard non-occlusive facial mask and HFNC at different flow rates (30, 45 and 60 l/min) were randomly applied, while maintaining constant FiO2 (20 min/step). At the end of each phase, we measured arterial blood gases, inspiratory effort, based on swings in esophageal pressure (ΔPes) and on the esophageal pressure-time product (PTPPes), and lung volume, by electrical impedance tomography. RESULTS:Seventeen patients with AHRF were enrolled in the study. At increasing flow rate, HFNC reduced ΔPes (p < 0.001) and PTPPes (p < 0.001), while end-expiratory lung volume (ΔEELV), tidal volume to ΔPes ratio (V T/ΔPes, which corresponds to dynamic lung compliance) and oxygenation improved (p < 0.01 for all factors). Higher HFNC flow rate also progressively reduced minute ventilation (p < 0.05) without any change in arterial CO2 tension (p = 0.909). The decrease in ΔPes, PTPPes and minute ventilation at increasing flow rates was better described by exponential fitting, while ΔEELV, V T/ΔPes and oxygenation improved linearly. CONCLUSIONS:In this cohort of patients with AHRF, an increasing HFNC flow rate progressively decreased inspiratory effort and improved lung aeration, dynamic compliance and oxygenation. Most of the effect on inspiratory workload and CO2 clearance was already obtained at the lowest flow rate.
journal_name
Intensive Care Medjournal_title
Intensive care medicineauthors
Mauri T,Alban L,Turrini C,Cambiaghi B,Carlesso E,Taccone P,Bottino N,Lissoni A,Spadaro S,Volta CA,Gattinoni L,Pesenti A,Grasselli Gdoi
10.1007/s00134-017-4890-1subject
Has Abstractpub_date
2017-10-01 00:00:00pages
1453-1463issue
10eissn
0342-4642issn
1432-1238pii
10.1007/s00134-017-4890-1journal_volume
43pub_type
杂志文章abstract:OBJECTIVE:Definition of the changes in the activators of plasminogen, u-PA and t-PA, and examination of the possible generation of plasmin in the circulation in overwhelming sepsis. DESIGN:Serial blood analysis starting 4 h after development of symptoms of toxic shock syndrome. SETTING:Intensive care unit. PATIENT:A...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/s001340050561
更新日期:1998-03-01 00:00:00
abstract:PURPOSE:Extracorporeal life support (ECLS) is used for patients with refractory heart failure with or without respiratory failure. This temporary support is provided by blood pumps which are connected to large vessels. Bleeding episodes are a typical complication in patients with ECLS. Recently, several studies illustr...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/s00134-011-2370-6
更新日期:2012-01-01 00:00:00
abstract::The arterial oxygen and carbon dioxide tensions, pulmonary and systemic haemodynamics and pulmonary shunting and mechanics were measured during the first 30 min after intravenous labetalol administration. Thirty patients, recovering in the intensive care unit after neurosurgical interventions were randomly divided in ...
journal_title:Intensive care medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/BF00255635
更新日期:1988-01-01 00:00:00
abstract:OBJECTIVE:Real-time measurement of stroke volume variation by arterial pulse contour analysis (SVV) is useful in predicting volume responsiveness and monitoring volume therapy in mechanically ventilated patients. This study investigated the influence of the depth of tidal volume (V(t)) on SVV both during the state of f...
journal_title:Intensive care medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/s00134-003-1649-7
更新日期:2003-03-01 00:00:00
abstract:PURPOSE:Patients undergoing cardiac surgery often require transfusions of red blood cells, plasma and platelets. These components differ widely in both indications for use and composition. However, from a statistical point of view there is a significant colinearity between the components. This study explores the relati...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/s00134-012-2723-9
更新日期:2013-03-01 00:00:00
abstract::Physicians are increasingly involved in how their critically ill patients die [72]. The more this happens, the more physicians will have to understand not only how their own backgrounds and biases influence their medical management, but also the cultural and religious backgrounds of the patient and surrogate [72, 73]....
journal_title:Intensive care medicine
pub_type: 杂志文章,评审
doi:10.1007/s001340000641
更新日期:2000-10-01 00:00:00
abstract::A 65-year-old man developed postsurgical septic shock, unresponsive to plasma volume expansion and administration of dopamine and dobutamine. A continuous norepinephrine infusion was then started and the dose increased to 0.62 micrograms.kg-1.min-1 until the mean arterial pressure was 70 mmHg. Prior to and during the ...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/BF02575309
更新日期:1990-01-01 00:00:00
abstract:OBJECTIVES:To study the pattern of lung emptying and expiratory resistance in mechanically ventilated patients with chronic obstructive pulmonary disease (COPD). DESIGN:A prospective physiological study. SETTING:A 12-bed Intensive Care Unit. PATIENTS:Ten patients with acute exacerbation of COPD. INTERVENTIONS:At th...
journal_title:Intensive care medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/s00134-004-2255-z
更新日期:2004-07-01 00:00:00
abstract:PURPOSE:We evaluated the impact of increasing tidal volume (V (t)), decreased chest wall compliance, and left ventricular (LV) contractility during intermittent positive-pressure ventilation (IPPV) on the relation between pulse pressure (PP) and LV stroke volume (SV(LV)) variation (PPV and SVV, respectively), and intra...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/s00134-011-2304-3
更新日期:2011-10-01 00:00:00
abstract:PURPOSE:In critically ill pediatric patients, fluid overload (FO) >10% has been identified as a threshold for possible interventions, including initiation of continuous renal replacement therapy (CRRT). However, multiple definitions have been reported, and there remains no consensus method for FO calculation. The goal ...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/s00134-012-2503-6
更新日期:2012-04-01 00:00:00
abstract:OBJECTIVE:Blood O(2) saturation and lactate concentration gradients from superior vena cava (SVC) to pulmonary artery (PA) occur in critically ill patients. These gradients (DeltaSO(2) and Delta[Lac]) may be positive or negative. We tested the hypothesis that positive DeltaSO(2) and Delta[Lac] are associated with impro...
journal_title:Intensive care medicine
pub_type: 杂志文章,多中心研究
doi:10.1007/s00134-008-1128-2
更新日期:2008-09-01 00:00:00
abstract::A prospective study of thiamine status in patients with severe injuries (injury severity scores greater than 12) showed that they all developed signs of severe thiamine deficiency on the basis of transketolase activity, the standard biochemical test for thiamine deficiency. This occurred within the first week after th...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/BF00256767
更新日期:1988-01-01 00:00:00
abstract::Clearly the main determinant of outcome in severe acute pancreatitis is the extent of pancreatic necrosis and the subsequent risk for the development of infected necrosis. A thorough assessment using appropriate scoring systems and the early use of dynamic contrast-enhanced CT will highlight those patients likely to b...
journal_title:Intensive care medicine
pub_type: 杂志文章,评审
doi:10.1007/s001340050808
更新日期:1999-02-01 00:00:00
abstract::The process of surgical decision making is based on both general principles that are amenable to evaluation using rigorous techniques of clinical research and the intangible element of surgical judgment that seeks to apply those principles to the care of an individual patient. The role of surgical judgment is inescapa...
journal_title:Intensive care medicine
pub_type: 指南,杂志文章,实务指引,评审
doi:10.1007/pl00003797
更新日期:2001-01-01 00:00:00
abstract:OBJECTIVES:To assess the reproducibility of respiratory dead space measurements in ventilated children. DESIGN:Prospective study. SETTING:University pediatric intensive care unit. PATIENTS:Thirty-two mechanically ventilated children (0.13-15.4 years) who were clinically stable. METHODS:The single-breath CO(2) test ...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/s00134-004-2288-3
更新日期:2004-07-01 00:00:00
abstract:PURPOSE:Gastrointestinal motility can be impaired by serious illness or medications, compromising enteral feeding in critical care patients. We compared small bowel transit time and morphology in neurosurgical critical care (ICU) patients with those in healthy subjects. METHODS:We evaluated small intestinal transit ti...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/s00134-009-1415-6
更新日期:2009-06-01 00:00:00
abstract:OBJECTIVE:To assess the ability of the Clinical Risk Index for Babies (CRIB) to predict long-term neurodevelopmental impairment in very low birth weight (VLBW) infants. DESIGN:Single-center cohort study. SETTING:Tertiary neonatal care hospital and follow-up clinic. PATIENTS:Four hundred fifty-five VLBW infants conse...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/s001340051157
更新日期:2000-03-01 00:00:00
abstract:OBJECTIVE:Angiopoietin-2 (Ang-2) is a potent regulator of vascular permeability and inflammation in acute lung injury and acute respiratory distress syndrome (ARDS). Genetic variants in the Ang-2 gene may lead to altered activities of Ang-2 (or ANGPT2) gene. The aim of this study was to assess if genetic variants of An...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/s00134-009-1413-8
更新日期:2009-06-01 00:00:00
abstract:INTRODUCTION:A prospective physiological study was performed in 12 paediatric patients with acute moderate hypercapnic respiratory insufficiency to assess the ability of noninvasive positive pressure ventilation (NPPV) to unload the respiratory muscles and improve gas exchange. MATERIALS AND METHODS:Breathing pattern,...
journal_title:Intensive care medicine
pub_type: 临床试验,杂志文章
doi:10.1007/s00134-008-1202-9
更新日期:2008-12-01 00:00:00
abstract:PURPOSE:To assess the generalisability of published clinical risk predictive models for invasive candidiasis in ICU patients. METHODS:The performance characteristics of published clinical risk factor-only and Candida colonisation-only predictive models for invasive candidiasis were assessed in a multicentre cohort of ...
journal_title:Intensive care medicine
pub_type: 杂志文章,多中心研究
doi:10.1007/s00134-009-1619-9
更新日期:2009-12-01 00:00:00
abstract::The effects of continuous and supplementary bolus dose administration of etomidate have been investigated in ten artificially ventilated patients in traumatic coma. Continuous infusion of etomidate (5-25 micrograms/kg/min) proved to be a practical and safe means of sedating these patients and appeared to control moder...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/BF01692549
更新日期:1983-01-01 00:00:00
abstract::As part of a nationwide evaluation of intensive care, we examined patient- and hospital-related factors which could influence the patterns of utilization of arterial cannulae and central venous and pulmonary artery catheters. We also studied the possible impact of these interventions on the short-term outcome among 14...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/BF01713935
更新日期:1991-01-01 00:00:00
abstract:OBJECTIVES:To establish a preliminary list of critical incidents (CIs) associated with mechanical ventilation and to describe a CI reporting method. DESIGN:A list of CIs was established based on a consensus among ICU caregivers. The list was compared to CIs collected prospectively during a predefined study period. SE...
journal_title:Intensive care medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/s00134-002-1251-4
更新日期:2002-04-01 00:00:00
abstract:OBJECTIVE:To investigate plasma high-mobility group box 1 protein (HMGB1) concentration and its relationship with organ dysfunction and outcome in septic shock patients. DESIGN AND SETTING:Prospective, noninterventional study. Medical adult intensive care unit at a university hospital in France. PATIENTS:42 criticall...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/s00134-007-0691-2
更新日期:2007-08-01 00:00:00
abstract:PURPOSE:To investigate the relationship between hemoglobin (Hgb) and brain tissue oxygen tension (PbtO(2)) after severe traumatic brain injury (TBI) and to examine its impact on outcome. METHODS:This was a retrospective analysis of a prospective cohort of severe TBI patients whose PbtO(2) was monitored. The relationsh...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/s00134-012-2593-1
更新日期:2012-09-01 00:00:00
abstract:OBJECTIVE:To compare isoflurane with midazolam for prolonged sedation in ventilated patients. DESIGN:Randomised controlled study. SETTING:General intensive care unit in university teaching hospital. PATIENTS:Sixty patients aged 17-80 years who required mechanical ventilation for more than 24 h. INTERVENTIONS:Sedati...
journal_title:Intensive care medicine
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/BF01694344
更新日期:1992-01-01 00:00:00
abstract:OBJECTIVE:To assess the relationship between the base deficit value in the immediate postoperative period of coronary surgery for cardiopulmonary bypass and the length of stay in the ICU. DESIGN AND SETTING:Prospective descriptive study in the department of anesthesia and cardiovascular surgery of a university hospita...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/s00134-002-1587-9
更新日期:2003-02-01 00:00:00
abstract::We report a clinical observation of acute pancreatitis due to severe hypertriglyceridemia in a pregnant woman. In order to decrease the serum triglyceride level rapidly, two lipaphereses were undertaken using the double-filtration technique. This lipoprotein apheresis technique is briefly described and the efficacy in...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/BF01709884
更新日期:1991-01-01 00:00:00
abstract::The aim of this investigation was to evaluate the role of ultrasonography in avoiding cranial misplacement of the tracheostomy tube and tracheal ring fractures during percutaneous dilatational tracheostomy (PDT). The tracheas of 26 consecutive ICU patients who had undergone PDT but who later died were removed en bloc ...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/s001340000589
更新日期:2000-09-01 00:00:00
abstract:OBJECTIVE:To assess the value of the diagnosis of overt disseminated intravascular coagulation (DIC) according to the International Society on Thrombosis and Haemostasis (ISTH) criteria and that of the parameters included in the ISTH score for overt DIC in predicting day 28 mortality in intensive care patients. Also, t...
journal_title:Intensive care medicine
pub_type: 杂志文章
doi:10.1007/s00134-005-2685-2
更新日期:2005-09-01 00:00:00