What is respiratory Oscillometry?

What is respiratory Oscillometry?

Respiratory oscillometry measures the mechanical properties of the respiratory system (upper and intrathoracic airways, lung tissue and chest wall) during quiet tidal breathing, by the application of small pressure or flow oscillations (input or forcing signal), most commonly at the mouth.

What is Oscillometry test?

Oscillometry testing measures blockages to air flow in the lungs, and is used to check lung function or pulmonary function in very young children or other people who have difficulty following directions or breathing deeply. The test is done by having your child breathe normally through a tube connected to a computer.

What is forced Oscillometry?

FOT measures the respiratory system impedance (Zrs) during spontaneous breathing; consequently, there are minimal lung volume changes that could artifactually alter the measurements (ie, bronchodilation after deep inspiration).

Does bronchoconstriction increase airway resistance?

Expiratory flow limitation is a key characteristic in chronic obstructive pulmonary disease (COPD). Increased airway resistance occurs due to bronchoconstriction, destruction of elastic tissue in the airways, and mucus hypersecretion from goblet cells caused by irritation of the epithelium.

What does oscillometric mean?

Oscillometry is the blood pressure (BP) measurement principle of most automatic cuff devices. The oscillogram (which is approximately the blood volume oscillation amplitude-external pressure function) is measured, and BP is then estimated via an empirical algorithm.

How does forced oscillation technique work?

The forced oscillation technique (FOT) is a non-invasive method that aims to evaluate the respiratory system resistance and reactance during spontaneous ventilation. The method is based on the application of sinusoidal pressure variations in the opening of the airway through a mouthpiece during spontaneous ventilation.

What is the FOT technique?

The forced oscillation technique (FOT) is a noninvasive method with which to measure respiratory mechanics. FOT data, especially those measured at the lower frequencies, are sensitive to airway obstruction, but do not discriminate between obstructive and restrictive lung disorders.

What factors increase airway resistance?

Multiple factors can influence airway resistance, including airflow velocity, the diameter of the airway, and lung volume. These are some of the most significant contributing factors and will be discussed further on how these variables exert change and why this is important for managing patient airways.

What happens when airway resistance increases?

Bronchospasm, mucus plugging, and edema in the peripheral airways result in increased airway resistance and obstruction. Air trapping results in lung hyperinflation, ventilation/perfusion (V/Q) mismatch, and increased dead space ventilation.

What is the purpose of auscultation?

Auscultation is the term for listening to the internal sounds of the body, usually using a stethoscope. Auscultation is performed for the purposes of examining the circulatory system and respiratory system (heart sounds and breath sounds), as well as the gastrointestinal system (bowel sounds).

https://www.youtube.com/watch?v=FmbI-UhPDFE