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https://hdl.handle.net/11499/4796
Title: | CT assessment of tracheal carinal angle and its determinants | Authors: | Karabulut, Nevzat | Keywords: | adolescent adult aged article body mass body weight bronchus computer assisted tomography controlled study correlation analysis diagnostic value disease association female heart atrium enlargement heart left atrium human image analysis image processing image quality image reconstruction major clinical study male measurement mediastinum medical assessment obesity pathological anatomy patient referral patient selection prospective study sex difference spine thoracic cavity trachea Adolescent Adult Aged Aged, 80 and over Body Mass Index Female Heart Atria Humans Male Middle Aged Obesity Sex Characteristics Tomography, Spiral Computed Trachea |
Abstract: | The aim of this study was to investigate the effect of body habitus, dimensions of the thoracic cavity, location of the carina within the mediastinum, and left atrial size on tracheal carinal angle using CT scan. The study population was drawn from the patients referred to CT scan for various indications. A total of 120 patients (65 men and 55 women; age range 17-85 years; mean age 56 years) who denied a history of prior thoracic surgery, and in whom CT scan excluded pulmonary fibrosis, moderate or severe emphysema, atelectasis, intrathoracic mass or adenopathy, pericardial or pleural effusion were prospectively enrolled. The interbronchial (IBA) and subcarinal (SCA) angles were measured on coronal reformatted images. The presternal and retrovertebral fat thickness, the anteroposterior and transverse diameters of the thorax, the distances from carina to the sternum and to the vertebral column were obtained at the level of carina. Three orthogonal dimensions and the volume of the left atrium were also assessed. The mean interbronchial angle was 77° ± 13° (range 49-109°) and subcarinal angle was 73° ± 16° (range 34-107°). IBA positively correlated with the female gender (r=0.25, p=0.007), body mass index (r=0.28, p=0.002), presternal (r=0.40, p=0.001) and retrovertebral fat thickness (r=0.31, p=0.001). The interbronchial angle was significantly greater in obese patients compared with lean patients (p=0.02). Both IBA and SCA were positively correlated with the left atrial volume (r=0.40, p=0.001 and r=0.34, p=0.001, respectively), and its transverse and craniocaudal dimensions. The carina-vertebral column distance inversely correlated with IBA (r= -0.42, p=0.001) and SCA (r= -0.41, p=0.001). The size of the thoracic cavity did not show significant relation to tracheal bifurcation angle. Tracheal bifurcation angle ranges widely in normal subjects, and absolute measurements of the carinal angle is of little diagnostic value. In addition to left atrial enlargement, female gender, obesity and close situs of carina relative to vertebral column are associated with greater tracheal bifurcation angle. © 2005 The British Institute of Radiology. | URI: | https://hdl.handle.net/11499/4796 https://doi.org/10.1259/bjr/75107416 |
ISSN: | 0007-1285 |
Appears in Collections: | PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection Tıp Fakültesi Koleksiyonu WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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