Lung function indices measured by Forced Oscillation Test in post covid period - Looking beyond lung fibrosis

Author(s):  
Nagesh Dhadge ◽  
Kameshwar Rao ◽  
Nitin Vanjare
Author(s):  
Pasquale Pio Pompilio ◽  
Roberta Macis ◽  
Valentina Isetta ◽  
Giulia Munaro ◽  
Paul Walker ◽  
...  

Children ◽  
2021 ◽  
Vol 8 (10) ◽  
pp. 857
Author(s):  
Ioanna Loukou ◽  
Maria Moustaki ◽  
Agni Deligianni ◽  
Olympia Sardeli ◽  
Konstantinos Douros

Spirometry is considered the gold standard method for monitoring lung function of patients with cystic fibrosis (CF) but it requires patients’ cooperation and therefore it is not useful for the majority of preschool-aged children. Oscillometry is an alternative modality for lung function monitoring that requires minimal cooperation and can be applied in children as young as 3 years of age. Furthermore, it generates lesser aerosol compared to spirometry, an issue that is of considerable importance in the COVID-19 era. The aim of this review was to present the existing clinical data regarding the application of oscillometry in children and adolescents with CF. The method seems to have acceptable feasibility and repeatability. However, there is conflicting data regarding the correlation of oscillometry values with the clinical symptoms of CF patients either in clinically stable or in exacerbation periods. Furthermore, it is not clear to what extent oscillometry measurements correlate with the spirometry indices. Based on current evidence, spirometry cannot be substituted by oscillometry in the monitoring of the respiratory status of children and adolescents with CF.


Author(s):  
Tomoki Ikoma ◽  
Koichi Masuda ◽  
Hisaaki Maeda ◽  
Sayaka Hanazawa

This paper describes the drag coefficient and the inertia coefficient on rigid circular cylinders under oscillating flows. And also VIV behavior of tubing is investigated by using horizontal orbit patterns of test models including effect of VIV. Rigid circular cylinders are used for the model experiment. The test models are suspended into still water through a flat spring, and hence VIV is observed found with hydroelasticity in spite of a rigid circular cylinder. This is a forced oscillation test in still water. The circular cylinders for the model test have drafts of 30 cm, 60 cm and 80 cm, and diameter of 5 cm and 8 cm. The models are oscillated with periods of 0.5 s to 4.6 s and with about 7 cm amplitude of the oscillation. Model tests of forced oscillation are carried out under transverse motion (VIV) fixed conditions because VIV effects are investigated to the drag and the inertia coefficients. It is shown that the drag coefficient increases and the inertia coefficient decreases when larger VIV response occurs under forced oscillation in an inline direction.


2002 ◽  
Vol 109 (1) ◽  
pp. S176-S176
Author(s):  
Mary D Klinnert ◽  
Marcella R Price ◽  
Gary L Larsen ◽  
Andrew H Liu

Author(s):  
Giovanna Cilluffo ◽  
Salvatore Fasola ◽  
Velia Malizia ◽  
Giuliana Ferrante ◽  
Laura Montalbano ◽  
...  

2021 ◽  
Vol 99 (11) ◽  
pp. 43-46
Author(s):  
E. M. Zhukovа ◽  
L. G. Vokhminovа

Clinical testing of the forced oscillation test (FOT) yielded criteria for bronchial obstruction: an increase in viscous respiratory resistance (VRR) (Rfo, Rin, Rex); the frequency dependence of VRR. The study of VRR promoted detection of bronchial malpatency in additional 20% of pulmonary tuberculosis patients who had no lung ventilation disorders, as evidenced by spirometry.


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