On the partial expiratory flow-volume loop shown here,identify the point depicting the "maximal expiratory flow at FRC."

Question

Quizplus · Accepted Answer

A relatively noninvasive technique to generate a partial expiratory flow volume (PEFV)curve in infants allows the measurement of expiratory flows during a forced maneuver in infants and small children.A rapid thoracic compression or "hug" is delivered to the sleeping infant's chest and abdomen with an inflatable jacket to produce a forced expiration.A pneumotachometer with a sealed face mask measures exhaled gas flow.The flow at the end-expiratory point of a normal resting tidal breath (FRC)is measured on the PEFV curve.This flow value,the maximal expiratory flow at FRC,is reported as liters per second.

On the Partial Expiratory Flow-Volume Loop Shown Here,identify the Point