Functional classification of chronic airflow limitation based on flow-volume and single-breath nitrogen washout criteria
dc.contributor.author | Brundler J.P. | |
dc.contributor.author | Lewis C.M. | |
dc.contributor.author | De Kock M.A. | |
dc.date.accessioned | 2011-05-15T16:17:53Z | |
dc.date.available | 2011-05-15T16:17:53Z | |
dc.date.issued | 1983 | |
dc.description.abstract | A simple means of functional classification of the individual patient has been devised. The performance of a forced flow-volume manoeuvre in concert with a single-breath nitrogen washout procedure in 54 comprehensively investigated patients with chronic airflow limitation yielded two parameters which could be employed in classification. A normalized alveolar nitrogen slope (FEV1/FVC · ΔN2%) greater than 4.0% per litre clearly delineated emphysema. The peak flow ratio (PEFR/PIFR%) categorized other subgroupings: a value in excess of 100% strongly suggests primary bronchial disease, while a lower value almost certainly indicates a mixed functional disorder. | |
dc.description.version | Article | |
dc.identifier.citation | Respiration | |
dc.identifier.citation | 44 | |
dc.identifier.citation | 1 | |
dc.identifier.issn | 00257931 | |
dc.identifier.uri | http://hdl.handle.net/10019.1/14410 | |
dc.subject | airway obstruction | |
dc.subject | diagnosis | |
dc.subject | human | |
dc.subject | lung flow volume curve | |
dc.subject | major clinical study | |
dc.subject | methodology | |
dc.subject | nitrogen washout | |
dc.subject | respiratory system | |
dc.subject | single breath nitrogen test | |
dc.subject | Forced Expiratory Flow Rates | |
dc.subject | Human | |
dc.subject | Lung Diseases, Obstructive | |
dc.subject | Nitrogen | |
dc.subject | Pulmonary Emphysema | |
dc.subject | Pulmonary Ventilation | |
dc.title | Functional classification of chronic airflow limitation based on flow-volume and single-breath nitrogen washout criteria | |
dc.type | Article |