Results 251 to 260 of about 646,889 (295)

Evaluation of Slow Vital capacity and Forced Vital Capacity in patients with COPD

Clinical Problems, 2018
Introduction: According to the Global Initiative for Chronic Obstructive Lung Disease (GOLD) criteria, COPD is diagnosed when the ratio of Forced Expiratory Volume to Forced Vital Capacity (FVC) Methods: the database consisted of a spirometry analysis of 227 healthy individuals and 532 patients with bronchial obstruction during 2013-2017.
Olga Nesterovska, Ganna Stupnytska, Anastasiya Stupnytska   +2 more
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Pattern of diaphragmatic activity during forced expiratory vital capacity

Journal of Applied Physiology, 1981
We measured transdiaphragmatic pressure (Pdi) during forced expiratory vital capacity (FVC) maneuvers in 13 normal subjects and electromyographic activity of the diaphragm (edi) in 8 of these subjects. In all subjects, Pdi increased at the initiation of the FVC.
C G, Melissinos, E N, Bruce, M D, Goldman, E, Elliott, J, Mead   +4 more
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A simple method to monitor performance of forced vital capacity

Journal of Applied Physiology, 1996
The forced vital capacity (FVC) maneuver is the most common lung function test. One of its major prerequisites is that it be performed with sufficient effort to achieve the maximal flows that are due to expiratory flow limitation. To verify this, in nine normal subjects, short (0.25-s) pulses of negative pressure (-5 to -20 cmH2O) were applied at the ...
C A, Volta, Y, Ploysongsang, L, Eltayara, J, Sulc, J, Milic-Emili   +4 more
openaire   +3 more sources

An Evaluation of Slow Vital Capacity and Forced Vital Capacity Difference in Aco Patients with Obesity

Clinical respiratory physiology, exercise and functional imaging, 2020
While COPD is characterised by an accelerated, although variable FEV1 decline , many ACO patients experience a slow decline in lung function. Among subjects with ACO, FEV1/FVC ratio may miss airflow limitation. It remains unclear whether using SVC instead of FVC increases the detecting of airflow limitation in ACO patients with obesity. Objectives: To
Olga Nesterovska, Ganna Stupnytska, Oleksandr Fediv, Oksana Pritulyak, Iryna Nemish   +4 more
openaire   +1 more source

Incomplete Forced Expiration – Estimating Vital Capacity by a Mathematical Method

Respiration, 2004
<i>Background:</i> Vital capacity is a key parameter in the determination of lung function, usually assessed by means of a forced expiration maneuver. This maneuver can be exhausting, and patients often cannot complete it. <i>Objectives:</i> This study evaluates a method to estimate forced vital capacity (FVC) based on the ...
Steltner, Holger, Vogel, Michael, Sprung, Eva, Timmer, Jens, Guttmann, Joseph, Sorichter, Stephan   +5 more
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Forced inspiratory measurements and the vital and inspiratory capacities

British Journal of Diseases of the Chest, 1972
Abstract Observations on 27 patients with chronic airways obstruction, 5 other patients and 6 healthy subjects indicate that forced inspiratory tests are of limited value. The one-second forced inspiratory volume (FIV 1 ) was found to be dependent on the vital capacity (VC).
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Predicting forced vital capacity (FVC) using support vector regression (SVR)

Physiological Measurement, 2019
Spirometry, as the gold standard approach in the diagnosis of chronic obstructive pulmonary disease (COPD), has strict end of test (EOT) criteria (e.g. complete exhalation), which cannot be met by patients with compromised health states. Thus, significant parameters measured by spirometry, such as forced vital capacity (FVC), have limited accuracies ...
Chenshuo, Wang, XianXiang, Chen, Rongjian, Zhao, Zhengling, He, Zhan, Zhao, Qingyuan, Zhan, Ting, Yang, Zhen, Fang   +7 more
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Desaturation after forced vital capacity measurement is suggested diffusing capacity disorder

Respiratory Investigation
Monitoring oxygen saturation (SpO2) in pulmonary functional testing (PFT) is useful to check for hypoxemia, especially in patients who performed home oxygen therapy. Although SpO2 is not part of PFT, assessing it allows testing to be performed more safely.
Kohei Shimizu, Naoji Masuya, Ikue Suzuki, Tomoya Uchimura, Nobuaki Sasaki, Toshinori Uto, Yui Kawauchi, Miyabi Watanabe, Yujiro Takai, Hidenari Nagai   +9 more
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Association Between the Forced Midexpiratory Flow/Forced Vital Capacity Ratio and Bronchial Hyperresponsiveness

Archivos de Bronconeumología ((English Edition)), 2004
A long-standing hypothesis is that a low ratio of airway caliber to lung size is associated with bronchial hyperresponsiveness (BHR). The aim of our study was to measure the association between airway caliber relative to lung size (expressed as the ratio between forced expiratory flow, midexpiratory phase, divided by forced vital capacity [FEF(25%-75%)/
I, Urrutia, A, Capelastegui, J M, Quintana, N, Muniozguren, F, Payo, J, Martínez Moratalla, J A, Maldonado, X, Basagana, J M, Anto, J, Sunyer   +9 more
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The timing of the forced vital capacity.

The American review of respiratory disease, 1979
Based on analysis of more than 2,500 forced vital capacity (FVC) maneuvers, we examined 2 aspects of the standards for spirometry recommended by the 1977 Snowbird Workshop concerning the timing of the FVC maneuver. We compared the forced expiratory volume in one sec (FEV1) when timing was initiated by the back extrapolation method with FEV1 when timing
R J, Knudson, M D, Lebowitz, R C, Slatin
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