Results 21 to 30 of about 3,345,378 (306)

The hypoxic pulmonary vasoconstriction: From physiology to clinical application in thoracic surgery

Saudi Journal of Anaesthesia, 2021
More than 70 years after its original report, the hypoxic pulmonary vasoconstriction (HPV) response continues to spark scientific interest on its mechanisms and clinical implications, particularly for anesthesiologists involved in thoracic surgery ...
Marc Licker, Andres Hagerman, Alexandre Jeleff, Raoul Schorer, Christoph Ellenberger   +4 more
doaj   +1 more source

Xenogeneic, extracorporeal liver perfusion in primates improves the ratio of branched-chain amino acids to aromatic amino acids (Fischer's ratio) [PDF]

, 1999
In fulminant hepatic failure (FHF), the development of hepatic encephalopathy is associated with grossly abnormal concentrations of plasma amino acids (PAA).
Puhl, G., Neuhaus, P., Schön, M. R., Hammer, C., Matthes, M., Heil, W., Lemmens, H.-P., Padval, D.   +7 more
core   +1 more source

Combined Assessment of Pulmonary Ventilation and Perfusion with Single-Energy Computed Tomography and Image Processing [PDF]

, 2021
RATIONALE AND OBJECTIVES: To establish a proof-of-principle for combined assessment of pulmonary ventilation and perfusion using single-energy computed tomography (CT) and image processing/analysis (denoted as single-energy CT ventilation/perfusion ...
Fujita, Yukio, Boone, John, Wisner, Erik, Johnson, Lynelle, Yamamoto, Tokihiro, Qi, Lihong, Kent, Michael, Stern, Joshua   +7 more
core   +1 more source

Sildenafil for treating patients with COVID-19 and perfusion mismatch: a pilot randomized trial

Critical Care, 2022
Background SARS-CoV-2 seems to affect the regulation of pulmonary perfusion. Hypoperfusion in areas of well-aerated lung parenchyma results in a ventilation–perfusion mismatch that can be characterized using subtraction computed tomography angiography ...
Mario G. Santamarina, Ignacio Beddings, Felipe Martinez Lomakin, Dominique Boisier Riscal, Mónica Gutiérrez Claveria, Jaime Vidal Marambio, Nicole Retamal Báez, Cristian Pavez Novoa, César Reyes Allende, Paulina Ferreira Perey, Miguel Gutiérrez Torres, Camila Villalobos Mazza, Constanza Vergara Sagredo, Sebastian Ahumada Bermejo, Eduardo Labarca Mellado, Elizabeth Barthel Munchmeyer, Solange Marchant Ramos, Mariano Volpacchio, Jorge Vega   +18 more
doaj   +1 more source

Hyperoxia affects the regional pulmonary ventilation/perfusion ratio : an electrical impedance tomography study [PDF]

, 2014
BACKGROUND: The way in which hyperoxia affects pulmonary ventilation and perfusion is not fully understood. We investigated how an increase in oxygen partial pressure in healthy young volunteers affects pulmonary ventilation and perfusion measured by ...
Sjöberg, Folke, Tesselaar, Erik, Janerot-Sjoberg, B, Borges, J. B.,, Borges, J. B., Li, Y., Janerot-Sjöberg, B.,, Sjöberg, Folke,, Böhm, S. H.,, Sjöberg, F., Borges, João Batista,, Li, Yuhong,, Böhm, S. H., Li, Yuhong, Janerot-Sjöberg, Birgitta,, Bohm, SH, Li, Y, Sjoberg, F, Borges, JB, Tesselaar, Erik,, Tesselaar, E., Tesselaar, E, Janerot-Sjöberg, B.   +22 more
core   +1 more source

Dual energy window imaging for optimisation of P/V ratios in VP SPECT

EJNMMI Physics, 2021
Purpose Ventilation–perfusion single-photon emission computed tomography (VP SPECT) plays an important role in pulmonary embolism diagnosis. Rapid results may be obtained using same-day ventilation followed by perfusion imaging, but generally requires ...
A. G. G. Doruyter, J. L. Holness
doaj   +1 more source

Platypnea-Orthodeoxia and Patent Foramen Ovale in a Patient in the Setting of COVID-19 [PDF]

Texas Heart Institute Journal
Platypnea-orthodeoxia syndrome is a rare condition characterized by positional dyspnea and hypoxemia, with symptoms presenting in the upright position and improving when recumbent.
Laura Sarmiento, MD, Riyad Kherallah, MD, Guilherme Vianna Silva, MD   +2 more
doaj   +1 more source

Comparison of phase-resolved functional lung (PREFUL) MRI derived perfusion and ventilation parameters at 1.5T and 3T in healthy volunteers.

PLoS ONE, 2020
PurposeThe purpose of this study is to evaluate the influence of different field strengths on perfusion and ventilation parameters, SNR and CNR derived by PREFUL MRI using predefined sequence parameters.MethodsData sets of free breathing 2d FLASH lung ...
Julian Glandorf, Filip Klimeš, Andreas Voskrebenzev, Marcel Gutberlet, Lea Behrendt, Cristian Crisosto, Frank Wacker, Pierluigi Ciet, Jim M Wild, Jens Vogel-Claussen   +9 more
doaj   +1 more source

Optimization of anesthetic tactics in the surgical treatment of multiple primary non-small cell lung cancer

Южно-Российский онкологический журнал, 2021
The article describes a clinical case of surgical treatment of a patient with multiple primary malignant lesions of the lungs (cancer of the left lung, central peribronchial nodular tumor with involvement of the upper lobe and distal parts of the main ...
S. N. Tikhonova, D. A. Rozenko, N. D. Ushakova, N. N. Popova, A. M. Skopintsev, A. V. Shulga, I. A. Ten   +6 more
doaj   +1 more source

Measurement of continuous distributions of ventilation-perfusion ratios: theory [PDF]

Journal of Applied Physiology, 1974
The resolution of the technique considered is sufficient to describe smooth distributions containing blood flow to unventilated regions (shunt), ventilation to unperfused regions (dead space), and up to three additional modes over the range of finite ventilation-perfusion ratios.
P D, Wagner, H A, Saltzman, J B, West
openaire   +2 more sources