Flow volume loop as a diagnostic marker

Flow volume curve: A diagnostic tool in extrathoracic airway obstruction

“…The Empey index, calculated as FEV1 (ml/s) divided by the PEF (l/min)]. Empey index values more than 10 considered abnormal 6 . In this case, considering all these parameters, including Flow Volume curve shape, it was identified that patient has a fixed extrathoracic airway obstruction.…”

Role of spirometry with flow volume loop in the diagnosis of upper airway obstruction: A study from the pulmonary medicine department of a tertiary care center

“…predominant VET UAO pattern of flattening of the inspiratory loop 11 . PITS is a common cause for UAO and is inadequately studied 12 . PITS can occur as sequelae in 10-22% of invasive endotracheal intubation cases due to the physical injury to the tracheal mucosa with the resultant inflammatory cascade.…”

An increasingly breathless patient

“…[1] The authors describe the case of a young girl who developed exertional dyspnea after a period of mechanical ventilation. Flow-volume loops demonstrated a “box-pattern” suggesting fixed upper airways obstruction.…”

“…We read the recent article by Karkhanis and colleagues entitled “Flow volume loops as a diagnostic marker” with great interest. [ 1 ] The authors describe the case of a young girl who developed exertional dyspnea after a period of mechanical ventilation. Flow-volume loops demonstrated a “box-pattern” suggesting fixed upper airways obstruction.…”

“…As discussed by Karkhanis et al ., variations in this clipping can give a clue as to the cause of upper airway obstruction. [ 1 ] In addition, flow-volume loops can provide an estimate of the size of the patent airway by changing the diameter of the mouth piece used until it becomes the rate-limiting component.…”