The forced inspiratory nasal flow-volume curve is an interesting concept that combines nasal inspiratory peak flow with the assessment of nasal vital capacity. As with other measurements of nasal peak flow, this potentially may be useful in the detection of large changes in nasal patency in individual subjects. It also may be among the most economical methods of evaluating nasal patency dynamically. However, it is limited by subjective variables of patient effort, and by observer interpretation of the proper technique and effort, as are other measurements of peak flow, whether nasal (as in nasal obstruction) or oral (as in lower airway obstruction). Nonetheless, this concept may appeal to some clinicians. Rhinomanometry is the best studied method3–5 for measuring nasal flow and resistance, and remains the standard for comparison.