L Lu un ng g f fu un nc ct ti io on n, , C CT T--s sc ca an n a an nd d X X--r ra ay y i in n u up pp pe er r a ai ir rw wa ay y o ob bs st tr ru uc ct ti io on n d du ue e t to o t th hy yr ro oi id d g go oi it tr re e ABSTRACT: The purpose of this study was to assess the clinical reliability and to compare routine lung function tests (maximal flows and resistance) and radiological images (computed tomography (CT)-scan and X-ray) in upper airway obstruction.We, therefore, performed these examinations prospectively in 28 female patients (aged 68±13 yrs) with a goitre and without pulmonary disorders. Lung function measurements consisted of maximum expiratory and inspiratory flow-volume curves and of airway resistance. CT-scans and X-rays were performed during apnoea at functional residual capacity (FRC).Peak expiratory flow was 3.6±1.3 l·s -1 (i.e. 62±21% predicted); airway resistance was 0.38±0.14 kPa (i.e. 149±58% pred); and specific conductance was 1.0±0.3 kPa (i.e. 70±24% pred). Almost all lung function tests were significantly correlated with each other. On CT-scan the tracheal cross-sectional area at the zone of tracheal narrowing could be evaluated in 26 patients and was 58±17% (CT 1/2 ) of the control area 2 cm above the carina (CT 2 ). On X-ray the sagittal and coronal tracheal diameters at the zone of narrowing could only be measured in 16 subjects and were 60±17% (X-dia 1/2 ) of the diameter at the control level. CT 1/2 and X-dia 1/2 were significantly correlated to each other. No correlation was found between the lung function tests and the radiological indices except airway resistance and CT 2 .Routine lung function and CT-scan do not provide comparable information on the degree of airway obstruction due to a goitre. Furthermore, X-ray of the trachea seems to be unreliable in visualizing upper airway obstruction.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.