نتایج جستجو برای: tidal volume tv
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Independent of airway pressure, pulmonary resistance is known to fall with increasing tidal volumes, traditionally thought to result from radial traction on the airways. R. C. Anafi and T. A. Wilson (J Appl Physiol 91: 1185-1192, 2001) recently presented a model of a single terminal airway that explains the tidal volume-associated fall in resistance with an additional mechanism pertinent to nar...
RATIONALE In a clinical trial by the Acute Respiratory Distress Syndrome Network (ARDSNet), mechanical ventilation with tidal volumes of 6 ml/kg decreased mortality from acute lung injury. However, interpretations of these results generated controversy and it was unclear if this trial would change usual-care practices. OBJECTIVES First, to determine if clinical practices at ARDSNet hospitals ...
BACKGROUND Compared to conventional tidal volume ventilation, low tidal-volume ventilation reduces mortality in cased of acute respiratory distress syndrome. The aim of the present study is to determine whether low tidal-volume ventilation reduces the production of inflammatory mediators in the lungs and improves physiological status during hepatic surgery. METHODS We randomly assigned patien...
BACKGROUND Pre-operative administration of benzodiazepines can cause hypoventilation-a decrease in minute ventilation (MV)-commonly referred to as "respiratory compromise or respiratory depression." Respiratory depression can lead to hypercarbia and / or hypoxemia, and may heighten the risk of other respiratory complications. Current anesthesia practice often places patients at risk for respira...
Why the continued confusion over the issue of intermittent positive-pressure breathing (IPPB) as related to therapeutic benefits? Welch’s’ communication in response to the article by Loren et a12 comparing simple nebulization and IPPB in asthmatic children fails again to identify specific criteria for therapy with IPPB. Welch and Loren are both correct in identifying the ineffectiveness of ther...
INTRODUCTION Lung fibrosis, reduced lung compliance, and severe hypoxemia found in patients with acute lung injury often result in a need for the support of mechanical ventilation. High-tidal-volume mechanical ventilation can increase lung damage and fibrogeneic activity but the mechanisms regulating the interaction between high tidal volume and lung fibrosis are unclear. We hypothesized that h...
Tidal volume (TV), defined as the amount of air that moves in or out lungs with each respiratory cycle, is important evaluating function. Although TV can be reliably measured laboratory settings, this information hardly obtainable under everyday living conditions. Under such conditions, wearable devices could provide valuable support to monitor vital signs, heart rate (HR) and breathing (BR). T...
BACKGROUND It is uncertain whether lung-protective mechanical ventilation using low tidal volumes should be used in all critically ill patients, irrespective of the presence of the acute respiratory distress syndrome (ARDS). A low tidal volume strategy includes use of higher respiratory rates, which could be associated with increased sedation needs, a higher incidence of delirium, and an increa...
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