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Keywords = Forced Oscillatory Technique (FOT)

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14 pages, 814 KB  
Review
Applications of Forced Oscillatory Technique in Obstructive and Restrictive Pulmonary Diseases: A Concise State of the Art
by Claudio Tirelli, Sabrina Mira, Marta Italia, Sara Maggioni, Carmelo Intravaia, Martina Zava, Simone Contino, Elena Maria Parazzini and Michele Mondoni
J. Clin. Med. 2025, 14(16), 5718; https://doi.org/10.3390/jcm14165718 - 12 Aug 2025
Cited by 5 | Viewed by 3515
Abstract
The FOT is a non-invasive method for assessing respiratory mechanics. It enables the measurement of respiratory system impedance by applying pressure oscillations through a loudspeaker at the subject mouth and then studying its deformation, which is commensurate to the resistance opposed by the [...] Read more.
The FOT is a non-invasive method for assessing respiratory mechanics. It enables the measurement of respiratory system impedance by applying pressure oscillations through a loudspeaker at the subject mouth and then studying its deformation, which is commensurate to the resistance opposed by the respiratory system. The main parameters which can be determined with the FOT are the impedance (Z) and the components of respiratory resistance (Rrs) and reactance (Xrs). The FOT has been predominantly applied to the study of respiratory mechanics for research purposes; however, preclinical experiments and subsequently observational clinical studies have demonstrated that FOT can effectively assess airway obstruction, bronchodilator response, bronchial hyperresponsiveness, and the presence of small airways disease. More recently, studies on the FOT in restrictive lung diseases have also been reported. Nonetheless, international guidelines on the precise applications of the FOT in lung diseases are still lacking. The aim of the review was to describe the technical aspects related to the FOT methodology in clinical practice and to provide a concise state of the art on the applications of the FOT in obstructive and restrictive lung diseases. Full article
(This article belongs to the Special Issue Review Special Issue Series: Recent Advances in Pulmonology)
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12 pages, 476 KB  
Opinion
Clinical Application of Forced Oscillation Technique (FOT) in Early Detection of Airway Changes in Smokers
by Prem Bhattarai, Stephen Myers, Collin Chia, Heinrich C. Weber, Sally Young, Andrew D. Williams and Sukhwinder Singh Sohal
J. Clin. Med. 2020, 9(9), 2778; https://doi.org/10.3390/jcm9092778 - 27 Aug 2020
Cited by 36 | Viewed by 8103
Abstract
The forced oscillation technique (FOT) is a non-invasive method to assess airway function by emitting oscillatory signals into the respiratory tract during tidal ventilation. This opinion piece discusses the current use, trialled modification and future directions in utilizing FOT as a novel diagnostic [...] Read more.
The forced oscillation technique (FOT) is a non-invasive method to assess airway function by emitting oscillatory signals into the respiratory tract during tidal ventilation. This opinion piece discusses the current use, trialled modification and future directions in utilizing FOT as a novel diagnostic tool for early detection of small airway changes in smokers. The published evidence to date has shown that FOT parameters could be a sensitive diagnostic tool to detect early respiratory changes in smokers. Multiple frequencies and the frequency dependence of resistance and reactance can provide the most valuable and early information regarding smoking induced changes in airways. Considering its non-invasiveness, lower level of discomfort to patients than spirometry, feasibility, and cost effectiveness, it could be the first-choice diagnostic technique for detection of early respiratory changes in smokers. The finding of FOT could further be supported and correlated with inflammatory markers. Full article
(This article belongs to the Section Respiratory Medicine)
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