title: A clinical evaluation of the Cottle rhinomanometry "flow" nozzle.
abstract: A clinical study was undertaken to establish what changes in values were caused by the nozzle used in the Cottle flow-pressure technique of rhinomanometry. Cottle rhino-sphygmo-manometry was performed over seven hundred times, half with the nozzle and half without and the results analyzed using pattern, rate, amplitude, work co-efficient and four breath factor as outlined by Cottle. In many instances marked changes did occur but were unpredictable by examination prior to testing. It is suggested that Cottle rhino-sphygmo-manometry be carried out routinely with and without this nozzle in order to better evaluate results of flow-pressure relationship in which this nozzle is used.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009296:Nasal Cavity / Q000502:physiology*; D011312:Pressure; D012123:Pulmonary Ventilation; D012129:Respiratory Function Tests / Q000295:instrumentation / Q000379:methods*