Since the initial description of the flow-volume loop (FVL) by Miller and Hyatt in the early 1970's as a clinical predictor of upper airway obstruction (UAO), 1 its utility in clinical practice ...

BEIJING—Horizontal loops in catheter tubing can reduce flow rate by nearly two-thirds, a study has shown. Investigators analyzed water flow through Foley catheters of different diameters with or ...