نتایج جستجو برای: tidal volume tv

تعداد نتایج: 349592  

Journal: :Applied microbiology 1972
G A Fairchild

A pressure plethysmograph for measuring respiratory volume in mice during exposure to virus aerosols is described. The respiratory frequency and tidal volume were measured, and from these data the minute ventilation was calculated. The mean respiratory frequency of adult, male mice was 255 per min; the mean tidal volume of 0.18 ml was inversely related to respiratory frequency. The standardized...

Journal: :Respiration; international review of thoracic diseases 2013
Jens Bräunlich Denise Beyer David Mai Stefan Hammerschmidt Hans-Jürgen Seyfarth Hubert Wirtz

BACKGROUND A high flow of air applied by large bore nasal cannulae has been suggested to improve symptoms of chronic respiratory insufficiency. In pediatric patients, nasal high-flow (nHF) ventilation was similarly effective compared to noninvasive ventilation with a face mask. OBJECTIVES The aim of this study was to describe changes in respiratory parameters. METHODS We measured pressure a...

2014
Jong Dal Jung Sang Hun Kim Byung Sik Yu Hye Ji Kim

BACKGROUND Hypoxemia during one-lung ventilation (OLV) remains a major concern. The present study compared the effect of alveolar recruitment strategy (ARS) on arterial oxygenation during OLV at varying tidal volumes (Vt) with or without positive end-expiratory pressure (PEEP). METHODS In total, 120 patients undergoing wedge resection by video assisted thoracostomy were randomized into four g...

Journal: :The European respiratory journal 2003
S C Ranganathan I Goetz A F Hoo S Lum R Castle J Stocks

Simple methods are needed to assess lung function in infants with cystic fibrosis (CF). This study determined the relationship between simple measurements obtained from tidal breathing with those from more complicated forced expiratory manoeuvres. Healthy infants and infants with CF were recruited from two maternity units and five specialist CF hospitals, respectively. Respiratory rate, tidal v...

Journal: :American journal of physiology. Lung cellular and molecular physiology 2007
Shuhei Ota Kyota Nakamura Takuya Yazawa Yosuke Kawaguchi Yasuko Baba Ritsuko Kitaoka Naoto Morimura Takahisa Goto Yoshitsugu Yamada Kiyoyasu Kurahashi

Ischemia-reperfusion not only damages the affected organ but also leads to remote organ injuries. Hepatic inflow interruption usually occurs during hepatic surgery. To investigate the influence of liver ischemia-reperfusion on lung injury and to determine the contribution of tidal volume settings on liver ischemia-reperfusion-induced lung injury, we studied anesthetized and mechanically ventila...

Journal: :Journal of applied physiology 1999
K G Davidson A D Bersten T E Nicholas P R Ravenscroft I R Doyle

The application of impedance pneumography for monitoring respiration in small animals has been limited by problems with calibration. With improved instrumentation, we describe the calibration of tidal volume in anesthetized rats. The detection of changes in voltage, reflecting the electrical impedance variations associated with respiration, was optimized by using disposable adhesive silver-silv...

Journal: :The European respiratory journal 1994
A Noseda J P Carpiaux J Schmerber F Valente J C Yernault

The purpose of this study, in patients with chronic obstructive pulmonary disease (COPD), was to examine the relationship of dyspnoea, rated on a visual analogue scale (VAS), to 1) tidal ventilatory variables measured on exercise and 2) pre-exercise lung function. Twenty one patients (forced expiratory volume in one second (FEV1) mean (SD) 1.19 (0.32) l) were studied. During a preliminary test,...

Journal: :European Journal of Anaesthesiology 2021

2017
Samantha Warren Christopher N. Hurt Thomas Crosby Mike Partridge Maria A. Hawkins

PURPOSE Radiation therapy dose escalation using a simultaneous integrated boost (SIB) is predicted to improve local tumor control in esophageal cancer; however, any increase in acute hematologic toxicity (HT) could limit the predicted improvement in patient outcomes. Proton therapy has been shown to significantly reduce HT in lung cancer patients receiving concurrent chemotherapy. Therefore, we...

2013
Rogier M Determann Annick ANM Royakkers Jacqueline Schaefers Anita M de Boer Jan M Binnekade Jan P van Straalen Marcus J Schultz

BACKGROUND Serum levels of N-terminal proB-type natriuretic peptide (NT-proBNP) are elevated in patients acute respiratory distress syndrome (ARDS). Recent studies showed a lower incidence of acute cor pulmonale in ARDS patients ventilated with lower tidal volumes. Consequently, serum levels of NT-proBNP may be lower in these patients. We investigated the relation between serum levels of NT-pro...

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