Pulmonary flow loop.

بررسی شکل منحنی جریان و حجم در ضایعات انسدادی کارینا و برونش

Spirometry and flow - volume loop show the abnormal pattern of pulmonary dysfunction and the site of the obstruction of upper and peripheral airways. For determinig the shape of flow - volume loop in obstruction of carina and bronchus we examined 19 patients with large airway obstruction documented with fiberoptic bronchoscopy via pulmonary function testing and flow ­volume loop performing. Two...

بررسی زاویه بتا در منحنی جریان - حجم در بیماران مبتلا به انسداد راههای هوائی

It is known that spiromentry is the most conventional method to determine pulmonary function. In spirometry, the shape of flow-volume loop is the most helpful finding to evaluate pulmonary dysfunction. Obstruction is best demonstrated by the slope of the descending portln of the exhalation curve. Measurement of fJ-angle is helpful for determination of this slope. fJ-angle is defined by 3 points...

The flow volume loop: normal standards and abnormalities in chronic obstructive pulmonary disease.

The flow-volume loop is a test of ventilatory function in which a graphic recording of maximal flow rates is dispiayed at all lung volumes during a maximal effort forced expiratory and inspiratory vital capacity maneuver. The test is errsy to demonstrate, administer, and analyze. Pulmonary diseases produce characteristic flow-volume loop abnormalities. The visualization of abnormalities and cal...

Modelling and Experimental Study of Wax Deposition in Transportation Line Using a Flow Loop System

Pulmonary function and flow-volume loop patterns in patients with tracheobronchomalacia.

BACKGROUND Patterns of pulmonary function tests (PFTs) and flow-volume loops among patients with clinically important tracheobronchomalacia (TBM) are not well described. Small studies suggest 4 main flow-volume loop morphologies: low maximum forced expiratory flow, biphasic expiratory curve, flow oscillations, and notching. We studied common PFT and flow-volume loop patterns among the largest p...

Clinical application of the flow-volume loop.

A convenient method for recording pulmonary function which allows for rapid graphic bedside analysis was presented. The method involves recording flow-volume (‘V-V) loop, in correct alignment to a previously determined FRC. FRC was measured by a rapid nitrogen dilution method. This method of recording pulmonary function affords a composite of TLC and all subdivisions with corresponding flow whi...