Search Results - "Venegas, J. G"

Relationship between airway narrowing, patchy ventilation and lung mechanics in asthmatics by Tgavalekos, N. T, Musch, G, Harris, R. S, Vidal Melo, M. F, Winkler, T, Schroeder, T, Callahan, R, Lutchen, K. R, Venegas, J. G

“…Bronchoconstriction in asthma results in patchy ventilation forming ventilation defects (VDefs). Patchy ventilation is clinically important because it affects…”
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Functional effect of longitudinal heterogeneity in constricted airways before and after lung expansion by WONGVIRIYAWONG, C, HARRIS, R. S, ZHENG, H, KONE, M, WINKLER, T, VENEGAS, J. G

“…Heterogeneity in narrowing among individual airways is an important contributor to airway hyperresponsiveness. This paper investigates the contribution of…”
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A comprehensive equation for the pulmonary pressure-volume curve by Venegas, Jose G, Harris, R. Scott, Simon, Brett A

“…Departments of Anesthesia and Critical Care, and Pulmonary Unit, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston,…”
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An objective analysis of the pressure-volume curve in the acute respiratory distress syndrome by HARRIS, R. S, HESS, D. R, VENEGAS, J. G

“…To assess the interobserver and intraobserver variability in the clinical evaluation of the quasi-static pressure-volume (P-V) curve, we analyzed 24 sets of…”
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Peripheral resistance: a link between global airflow obstruction and regional ventilation distribution by Wongviriyawong, C, Harris, R S, Greenblatt, E, Winkler, T, Venegas, J G

“…Airflow obstruction and heterogeneities in airway constriction and ventilation distribution are well-described prominent features of asthma. However, the…”
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Stress concentration around an atelectatic region: A finite element model by Makiyama, A.M, Gibson, L.J, Harris, R.S, Venegas, J.G

“…Highlights • We use finite element modeling to study the effects of atelectasis. • We modeled the lung mechanics using non-linear large deformations and…”
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Relation between structure, function, and imaging in a three-dimensional model of the lung by Tgavalekos, Nora T, Venegas, J G, Suki, B, Lutchen, K R

“…Previous studies have reported morphometric models to predict function relations in the lung. These models, however, are not anatomically explicit. We have…”
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Understanding the pressure cost of ventilation: why does high-frequency ventilation work? by Venegas, J G, Fredberg, J J

“…To understand when the use of high-frequency ventilation would be advantageous, we formulated the problem of achieving adequate alveolar ventilation at minimal…”
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Modeling kinetics of infused 13NN-saline in acute lung injury by O'Neill, K, Venegas, J. G, Richter, T, Harris, R. S, Layfield, J. D. H, Musch, G, Winkler, T, Melo, M. F. Vidal

“…1 Department of Anesthesia and Critical Care, and 2 Pulmonary and Critical Care Unit, Department of Medicine, Massachusetts General Hospital and Harvard…”
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Effects of lung motion and tracer kinetics corrections on PET imaging of pulmonary function by Mijailovich, Srboljub M, Treppo, Steven, Venegas, Jose G

“…Srboljub M. Mijailovich, Steven Treppo, and José G. Venegas Department of Anesthesia, Massachusetts General Hospital, and Harvard Medical School, Boston,…”
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Modeling expiratory flow from excised tracheal tube laws by Aljuri, Nikolai, Freitag, Lutz, Venegas, Jose G

“…Department of Anesthesia (Bio-Engineering), Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114; and Ruhrlandklinik Essen,…”
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Positron emission tomography imaging of regional lung function by Musch, G, Venegas, J G

“…Regional pulmonary perfusion and ventilation can be assessed by imaging, with positron emission tomography (PET), the pulmonary kinetics of [13N]nitrogen…”
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Viscoelastic properties of the contracting detrusor. I. Theoretical basis by Venegas, J G

“…This paper presents the theoretical basis for estimating the detrusor's viscoelastic properties using the small-amplitude oscillatory perturbations technique…”
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Changes in regional lung mechanics and ventilation distribution after unilateral pulmonary artery occlusion by Simon, Brett A, Tsuzaki, Koichi, Venegas, Jose G

“…Brett A. Simon 2 , Koichi Tsuzaki 1 , and Jose G. Venegas 1 1  Departments of Anesthesia and Biomedical Engineering, Massachusetts General Hospital, Harvard…”
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Regional lung mechanics and gas transport in lungs with inhomogeneous compliance by Tsuzaki, K, Hales, C A, Strieder, D J, Venegas, J G

“…The effect of respiratory frequency (f) on the distributions of ventilation, regional gas transport, lung volume, and regional impedance was assessed with…”
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Assessment and modeling of the physical components of human corporovenous function by Venegas, J G, Sullivan, M P, Yalla, S V, Vickers, Jr, M A

“…To understand and quantify specific causes of venoocclusive dysfunction, an analog model of penile hemodynamics, including a mechanism of flow limitation by…”
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Ventilation distribution and regional lung impedance during partial unilateral bronchial obstruction by Simon, B A, Tsuzaki, K, Venegas, J G

“…Significant degrees of main-stem bronchial obstruction may not have a detectable effect on ventilation distribution at normal breathing frequencies. We…”
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Regional coupling between chest wall and lung expansion during HFV: a positron imaging study by Venegas, J G, Tsuzaki, K, Fox, B J, Simon, B A, Hales, C A

“…Apparently conflicting differences between the regional chest wall motion and gas transport have been observed during high-frequency ventilation (HFV). To…”
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Analyzing 13NN lung washout curves in the presence of intraregional nonuniformities by Simon, B A, Venegas, J G

“…The use of 13NN and positron imaging provides a powerful noninvasive means of assessing regional pulmonary function. Current techniques for analyzing lung…”
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Contributions of diffusion jet flow and cardiac activity to regional ventilation in CFV by Venegas, J G, Yamada, Y, Hales, C A

“…The magnitude and regional distribution of local gas transport during constant-flow ventilation (CFV) were quantified by imaging the washout of nitrogen 13…”
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