Search Results
Results 451 - 500 of 2139
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Asakura Takanori - - 2013
The aim of this report is to call attention to a poorly recognised cause of pulmonary hypertension, thiamine deficiency. A 78-year-old woman without alcoholism or malabsorption presented with progressive dyspnoea and generalised oedema. Echocardiography showed signs of right ventricular overload with an estimated systolic pulmonary artery pressure of 50 mm ...
Rossi Felipe de Souza Fde - - 2013
Nasal continuous positive airway pressure is used as a standard of care after extubation in very-low-birth-weight infants. A pressure of 5 cmH2O is usually applied regardless of individual differences in lung compliance. Current methods for evaluation of lung compliance and air distribution in the lungs are thus imprecise for preterm ...
Meng Gang - - 2013
Here we report thermal evaporation dynamics of Au nanoparticles on single crystal oxide substrates, including MgO, SrTiO_{3}, and Al_{2}O_{3}. The size reduction rate of Au nanoparticles via thermal treatments is strongly dependent on not only temperature but also pressure. Lowering the pressure of inert Ar gas from 10^{5} to 10 ...
Thammanomai Apiradee - - 2013
The accepted protocol to ventilate patients with acute lung injury is to use low tidal volume (V(T)) in combination with recruitment maneuvers or positive end-expiratory pressure (PEEP). However, an important aspect of mechanical ventilation has not been considered: the combined effects of PEEP and ventilation modes on the integrity of ...
Meloche Jolyane - - 2013
Pulmonary arterial hypertension (PAH) is a vasculopathy characterized by enhanced pulmonary artery smooth muscle cell (PASMC) proliferation and suppressed apoptosis. This results in both increase in pulmonary arterial pressure and pulmonary vascular resistance. Recent studies have shown the implication of the signal transducer and activator of transcription 3 (STAT3)/bone morphogenetic ...
De Monte Valentina - - 2013
Objective-To evaluate the effectiveness of reduction of inspired oxygen fraction (Fio(2)) or application of positive end-expiratory pressure (PEEP) after an alveolar recruitment maneuver (ARM) in minimizing anesthesia-induced atelectasis in dogs. Animals-30 healthy female dogs. Procedures-During anesthesia and neuromuscular blockade, dogs were mechanically ventilated under baseline conditions (tidal volume, 12 mL/kg; ...
Tingay David G - - 2013
OBJECTIVES:: During high-frequency oscillatory ventilation, an understanding of the relationship between lung volume and lung mechanics may help clinicians better apply ventilation. The objectives of this study were: 1) to describe the relationship between lung volume and lung function parameters during mapping of the deflation limb of the pressure-volume relationship ...
Shi Jia-Xin - - 2013
This meta-analysis evaluated the effect of noninvasive, positive pressure ventilation on severe, stable chronic obstructive pulmonary disease (COPD). PUBMED, CNKI, Wanfang, EMBASE and the Cochrane trials databases were searched. Randomized controlled trials of patients with severe, stable COPD and receiving noninvasive positive pressure ventilation, compared with sham ventilation or no ...
Nishant Kumar - - 2013
A 30-year-old woman presented with a 1-year history of a dull ache in her left flank along with recent onset of hypertension. There was no history suggestive of tuberculosis and examination was unremarkable. X-ray showed dense opacity in left renal area. Contrast-enhanced CT revealed a non-enhancing and non-excretory left kidney ...
Zhang Yuxuan - - 2013
The behavior of sludge solubilization using high-pressure homogenization (HPH) treatment was examined by investigating the sludge solid reduction and organics solubilization. The sludge volatile suspended solids (VSS) decreased from 10.58 to 6.67 g/L for the sludge sample with a total solids content (TS) of 1.49% after HPH treatment at a ...
Petrucci Nicola - - 2013
Patients with acute respiratory distress syndrome and acute lung injury require mechanical ventilatory support. Acute respiratory distress syndrome and acute lung injury are further complicated by ventilator-induced lung injury. Lung protective ventilation strategies may lead to improved survival. This systematic review is an update of a Cochrane review originally published ...
Wang Shuo - - 2013
The destruction of the pulmonary structure after cardiopulmonary resuscitation may lead to lung function breakdown. The aim of this study was to investigate lung function after cardiopulmonary resuscitation and the influence of rescue breathing on lung function. Prospective, randomized animal study. A university animal research laboratory. Twenty-eight male domestic pigs ...
Blatteau Jean-Eric - - 2013
Recent advances in submarine rescue systems have allowed a transfer under pressure of crew members being rescued from a disabled submarine. The choice of a safe decompression procedure for pressurised rescuees has been previously discussed, but no schedule has been validated when the internal submarine pressure is significantly increased i.e. ...
Goutorbe Philippe - - 2013
Long term oxygen therapy improves survival in hypoxemic patients with chronic obstructive pulmonary disease (COPD). Because pressure support ventilation with a home care ventilator is largely unsupervised, there is considerable risk of leakage occurring, which could affect delivered FiO2. We have therefore conducted a bench study in order to measure ...
Croft Quentin P P - - 2013
The human pulmonary vasculature constricts in response to hypercapnia and hypoxia, with important consequences for homeostasis and adaptation. One function of these responses is to direct blood flow away from poorly-ventilated regions of the lung. In humans it is not known whether the stimuli of hypercapnia and hypoxia constrict the ...
Liu D - - 2013
Intra-abdominal hypertension (IAH) causes lung dysfunction in patients after hemorrhagic shock resuscitation. We performed intra-abdominal volume increment (IAVI) to IAH and studied its effect on pulmonary function. Methods: Eight minipigs established for IAH model by exsanquination until shock, incomplete blockage of portal vein and overload resuscitation were randomly divided into ...
Sánchez Luna Manuel - - 2013
Objective. To assess volume guarantee (VG) ventilation combined with high-frequency oscillatory ventilation (HFOV) strategy on PaCO2 regulation in an experimental model of neonatal distress syndrome. Methods. Six 2-day-old piglets weighing 2.57 ± 0.26 kg were used for this interventional experimental study. Animals were ventilated during physiologic lung conditions and after depletion ...
Yin Lei-Miao - - 2013
One of the most important theories of the traditional Chinese medicine is the exterior-interior relationship between the lung and the large intestine; so far, little direct experimental evidence has been reported to support such relationship. Here we for the first time investigated the mutual interactions between the lung and the ...
Zick Günther - - 2013
Lung-protective ventilation aims at using low tidal volumes (VT) at optimum positive end-expiratory pressures (PEEP). Optimum PEEP should recruit atelectatic lung regions and avoid tidal recruitment and end-inspiratory overinflation. We examined the effect of VT and PEEP on ventilation distribution, regional respiratory system compliance (CRS), and end-expiratory lung volume (EELV) ...
Becker Eva Maria - - 2013
Approved therapies for pulmonary arterial hypertension can induce oxygen desaturation when administered to patients with secondary forms of pulmonary hypertension (PH), probably due to an increase in ventilation/perfusion mismatch. Thus, so far these treatments have largely failed in secondary forms of PH. We established an animal model of heterogeneous lung ...
Humbert Marc - - 2013
Pulmonary hypertension is defined as an increase of mean pulmonary arterial pressure ≥25 mmHg at rest as assessed by right heart catheterization. According to different combinations of values of pulmonary wedge pressure, pulmonary vascular resistance and cardiac output, a hemodynamic classification of pulmonary hypertension has been proposed. Of major importance ...
Lindstedt Sandra - - 2013
To evaluate the lung function of donors after circulatory deaths (DCDs), ex vivo lung perfusion (EVLP) has been shown to be a valuable method. We present modified EVLP where lung atelectasis is removed, while the lung perfusion is temporarily shut down. Twelve pigs were randomized into two groups: modified EVLP ...
Beurskens Charlotte J - - 2013
Helium is a noble gas with a low density, allowing for lower driving pressures and increased carbon dioxide (CO2) diffusion. Since application of protective ventilation can be limited by the development of hypoxemia or acidosis, we hypothesized that therefore heliox facilitates ventilation in an animal model of ventilator-induced lung injury. ...
Bhatt Surya P - - 2013
The use of domiciliary noninvasive positive pressure ventilation (NPPV) in stable chronic obstructive pulmonary disease (COPD) with chronic hypercapnic respiratory failure has yielded variable effects on survival, quality of life, and dyspnea. We hypothesized that use of NPPV in stable COPD and partial pressure of carbon dioxide (PaCO2) <52 mmHg ...
Dubois Mathilde - - 2013
Tetrahydrobiopterin (BH4), which fosters the formation of and stabilizes endothelial NO synthase (eNOS) as an active dimer, tightly regulates eNOS coupling / uncoupling. Moreover, studies conducted in genetically-modified models demonstrate that BH4 pulmonary deficiency is a key determinant in the pathogenesis of pulmonary hypertension. The present study thus investigates biopterin ...
Nguyen T Dung - - 2013
Diastolic dysfunction in heart failure with preserved ejection fraction (HFpEF) may result in pulmonary congestion and lung remodeling. We evaluated the usefulness of major diastolic echocardiographic parameters and of the deceleration rate of early transmitral diastolic velocity (E/DT) in predicting lung remodeling in a rat model of HFpEF. Rats underwent ...
Zhang Chun-Yan CY Department of Cardiac Surgery, Charles Sturt University, Wagga Wagga, New South Wales, - - 2013
Intravenous infusion of prostaglandin E1 (PGE1) has been used to treat pulmonary arterial hypertension (PAH); however, the efficacy and safety of inhaled PGE1 is unclear. To investigate the effect of inhaled PGE1 on PAH following corrective surgery for congenital heart disease. Sixty patients with postoperative residual PAH following corrective surgery ...
Sperber Jesper J Centre for Clinical Research Sörmland, Uppsala University, Uppsala, Sweden ; Department of Medical Sciences, Infectious Diseases, Uppsala University, Uppsala, - - 2013
Low tidal volume ventilation is beneficial in patients with severe pulmonary dysfunction and would, in theory, reduce postoperative complications if implemented during routine surgery. The study aimed to investigate whether low tidal volume ventilation and high positive end-expiratory pressure (PEEP) in a large animal model of postoperative sepsis would attenuate ...
Sakuramoto Hideaki - - 2013
Although endotracheal suctioning induces alveolar derecruitment during mechanical ventilation, it is not clear whether repeated endotracheal suctioning exacerbates lung injuries. The present study aimed to determine whether repeated open endotracheal suctioning (OS) exacerbates lung injury compared to closed endotracheal suctioning (CS) during mechanical ventilation in an animal model of acute ...
Taylor Bryan J BJ Division of Cardiovascular Diseases, College of Medicine, Mayo Clinic and Foundation, Rochester, Minnesota 55905, USA. - - 2013
The mechanisms underlying the reactive component of pulmonary hypertension (PH) in heart failure (HF) are unclear. We examined whether resting systemic oxygen levels are related to pulmonary hemodynamics in HF. Thirty-nine HF patients underwent right heart catheterization. Subsequently, patients were classified as having: 1) no PH (n = 12); 2) passive PH ...
Roy Shreyas S Cardiopulmonary and Critical Care Laboratory, Department of Surgery, Upstate Medical University, Syracuse, NY, USA. - - 2013
Acute respiratory distress syndrome (ARDS) afflicts 200,000 patients annually with a mortality rate of 30% to 60% despite wide use of low tidal volume (LTV) ventilation, the present standard of care. High-permeability alveolar edema and instability occur early in the development of ARDS, before clinical signs of lung injury, and ...
Chen Wen-Chi WC Department of Environmental Medicine, New York University School of Medicine, Tuxedo, - - 2013
The function of the right heart is to pump blood through the lungs, thus linking right heart physiology and pulmonary vascular physiology. Inflammation is a common modifier of heart and lung function, by elaborating cellular infiltration, production of cytokines and growth factors, and by initiating remodeling processes. Compared to the ...
Yang Wanjie W Intensive Care Unit, the Fifth Central Hospital of Tianjin, Tianjin, People's Republic of - - 2013
To accurately measure the end-expiratory pulmonary artery wedge pressure (PAWP) with the "expiration holding" function on the ventilator and the "pulmonary artery wedge pressure review" software on the monitor. Fifty prospective measurements were made on 12 patients undergoing pulmonary artery catheter and mechanical ventilation. All measurements were divided into <8 ...
Saddy Felipe - - 2013
Biphasic positive airway pressure (BIVENT) is a partial support mode that employs pressure-controlled, time-cycled ventilation set at two levels of continuous positive airway pressure with unrestricted spontaneous breathing. BIVENT can modulate inspiratory effort by modifying the frequency of controlled breaths. Nevertheless, the optimal amount of inspiratory effort to improve respiratory ...
Silva Pedro L - - 2012
BACKGROUND:: Intravascular volume replacement is often required in the presence of increased pulmonary capillary leakage, for example in patients with volutrauma with major hemorrhage. In the present study, the effects of Ringer's acetate (RA), gelatin-polysuccinate (GEL), and a modern hydroxyethyl starch (HES, 6% 130/0.42) on lung and kidney function and ...
Fox Benjamin D - - 2012
What is the prevalence of occult left-heart disease in patients with scleroderma (SCL) and pulmonary hypertension (PH)? In patients with PH (mean pulmonary artery pressure mPAP≥25 ;mmHg), differentiation between pre/post capillary PH has been made according to pulmonary artery wedge pressure (PAWP) less/more than15 ;mmHg, respectively.Retrospective chart review of 107 ...
Kopeć Grzegorz - - 2012
BACKGROUND: Idiopathic pulmonary artery (PA) hypertension (IPAH) is associated with severe PA remodelling. Although the resulting increase in pulse wave velocity (PWV) might be of major pathophysiological relevance, little is known about PA-PWV in IPAH. The aim of this study was to characterize PA-PWV and its predictors in patients with ...
Garnero A J - - 2012
The first generation of mechanical ventilators were controlled and cycled by pressure. Unfortunately, they did not allow control of the delivered tidal volume under changes in the dynamics of the respiratory system. This led to a second generation of ventilators that allowed volume control, hence favoring the ventilatory strategy based ...
Yoshida Takeshi - - 2012
OBJECTIVES:: The benefits of spontaneous breathing over muscle paralysis have been proven mainly in mild lung injury; no one has yet evaluated the effects of spontaneous breathing in severe lung injury. We investigated the effects of spontaneous breathing in two different severities of lung injury compared with muscle paralysis. DESIGN:: ...
Dixon Dani-Louise - - 2012
AIMS: Chronic heart failure leads to pulmonary vascular remodelling and thickening of the alveolar-capillary barrier. We examined whether this protective effect may slow resolution of pulmonary oedema consistent with decreased bi-directional fluid flux. METHODS AND RESULTS: Seven weeks following left coronary artery ligation, we measured both fluid flux during an ...
Cordioli Ricardo Luiz - - 2012
PURPOSE OF REVIEW: Mechanical ventilation is one of the most important life support tools in the ICU, but it may also be harmful by causing ventilator-induced lung injury (VILI) and other deleterious effects. Advances in ventilator technology have allowed the introduction of numerous ventilator modes in an effort to improve ...
Costa Eduardo L V - - 2012
PURPOSE OF REVIEW: To review the new (Berlin) definition of the acute respiratory distress syndrome (ARDS) and to propose potential improvements. RECENT FINDINGS: The Berlin definition resulted in the following modifications: a criterion of less than 7 days was used to define acute onset; the requirement of pulmonary artery wedge ...
Della Rocca Giorgio - - 2012
PURPOSE OF REVIEW: This review will analyze the risk factors of acute lung injury (ALI) in patients undergoing thoracic surgery. Evidence for the occurrence of lung injury following mechanical ventilation and one-lung ventilation (OLV) and the strategies to avoid it will also be discussed. RECENT FINDINGS: Post-thoracotomy ALI has become ...
Rode Bojan - - 2012
BACKGROUND: Maintenance of the open lung alveoli in the expiration on mechanical ventilation in acute lung injury/acute respiratory distress syndrome (ALI/ARDS) remains challenging despite advances in lung imaging. The inspiratory lower inflection point (LIP) on the ventilator pressure-volume (P-V) curve estimates the required end-expiratory pressure for recruitment of alveolar consolidation. ...
Taleb Mohammed - - 2012
Background: Transthoracic echocardiography is commonly used to estimate pulmonary arterial systolic pressure (PASP) and to diagnose pulmonary hypertension (PH). However, some recent studies have questioned the accuracy of Doppler echocardiography (DE) in the assessment of PASP. The present meta-analysis was performed to estimate the accuracy, sensitivity, and specificity of DE ...
Fujioka Hideki - - 2012
We developed a computational model of lung parenchyma, which is comprised of individual alveolar chamber models. Each alveolus is modeled by a truncated octahedron. Considering the force balance between the elastin and collagen fibers laying on the alveolar membrane and the pressures acting on the membrane, we computed the deformations ...
Weichenthal Scott - - 2012
Few studies have examined indoor air quality in First Nations communities and its impact on cardiorespiratory health. To address this need, we conducted a cross-over study on a First Nations reserve in Manitoba, Canada including 37 residents in 20 homes. Each home received an electrostatic air filter and a placebo ...
Kheir John N - - 2012
BACKGROUND. Lung recruitment maneuvers are frequently used in the treatment of children with lung injury. Here, we describe a pilot study to compare the acute effects of two commonly used lung recruitment maneuvers on lung volume, gas exchange and hemodynamic profiles in children with acute lung injury (ALI). METHODS. In ...
Pirr Sabine M - - 2012
Background: Endotracheal suctioning, which is frequently necessary in mechanically ventilated patients, might cause complications, especially in patients with compromised lung function such as extremely low-birth-weight (ELBW) neonates. Objectives: To investigate whether closed endotracheal suctioning (CS) reduces the frequency of hypoxemia and bradycardia in ELBW neonates compared to open suctioning (OS). ...
Trojik T - - 2012
(Full text is available at http://www.manu.edu.mk/prilozi). Recruitment manoeuvre (RM) can be defined as a strategy to increase transient transpulmonary pressure. This study was aimed to evaluate the efficacy of e- sigh recruitment manoeuvre on patients with acute respiratory distress syndrome (ARDS). Thirty patients who fulfilled ARDS criteria were included in ...
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