Normal dimensions of trachea and two main bronchi in the Iranian population

Nina Zahedi-Nejad, Mehrdad Bakhshayesh-Karam, Shahram Kahkoei, Azizola Abbasi-Dezfoully, Mohammad Reza Masjedi, Nina Zahedi-Nejad, Mehrdad Bakhshayesh-Karam, Shahram Kahkoei, Azizola Abbasi-Dezfoully, Mohammad Reza Masjedi

Abstract

Background: The purpose of this study was to determine the normal diameters of larger airways in the Persian population, since these demographic variables are essential for interpretation of chest CTs and/or plain X-rays.

Material/methods: During a 6-month period, sagittal and coronal diameters of tracheas of all cases admitted for a chest CT to the radiology department of the National Research Institute of Tuberculosis and Lung Disease (NRITLD) were measured. The patients had to accept to take part in the study and had to fulfill the inclusion and exclusion criteria of the study. Ninety-nine percent confidence intervals (99% CI) were used to define the upper and lower limits of normal.

Results: Two hundred subjects, including 132 men and 68 women aged 20-85 years, were studied. CORONAL AND SAGITTAL DIAMETERS OF TRACHEAS IN THE UPPER PART WERE AS FOLLOWS: 1.8±0.24 and 2.06±0.27cm for men, and 1.48±0.20 and 1.49±0.24 for women, respectively. For the lower part that was: 1.8±0.23, 1.86±0.27, 1.51±0.18, and 1.46±0.23, respectively. For the right and left main-stem bronchi the values were as follows: 1.16±0.17 and 1.02±0.22 for men and 0.93±0.13 and 0.81±0.13 for women, respectively.

Conclusions: The values determined by us had a narrower range of normality than the ones found in the previous reports, so they will stay more friendly for interpretation of individual cases.

Keywords: CT; anatomy; bronchi; normal; trachea.

Figures

Figure 1.
Figure 1.
A minimal increment in the tracheal transverse diameter with increasing arm span.

References

    1. Giles E, Klepinger LL. Confidence intervals for estimates based on linear regression in forensic anthropology. J Forensic Sci. 1988;33:1218–22.
    1. Kamel KS, Lau G, Stringer MD. In vivo and in vitro morphometry of the human trachea. Clin Anat. 2009;22:571–79.
    1. Seymour AH. The relationship between the diameters of the adult cricoid ring and main tracheobronchial tree: a cadaver study to investigate the basis for double-lumen tube selection. J. Cardiothorac. Vasc Anesth. 2003;17:299–301.
    1. Breatnach E, Abbott GC, Fraser RG. Dimensions of the normal human trachea. Am J Roentgenol. 1984;142:903–6.
    1. Zhevnov VN, Bodnarchik LV. Dimensions of the larynx and trachea in young children. Vestn Khir Im I I Grek. 1969;103:116–17.
    1. Van SJ, Joos G, Pauwels R. Tracheobronchomegaly – the Mounier-Kuhn syndrome: report of two cases and review of the literature. Eur. Respir. J. 1991;4:1303–6.
    1. Padle S, MacDonald SLS. In: Adam: Grainger & Allison’s ed diagnostic radiology. 5th ed. China: Churchill Livingstone, electronic ed. An Imprint of Elsevier; 2008. The central airways; p. 12.
    1. Miró S, Klein JS. Methods of examination, normal anatomy, and radiographic findings of chest disease. In: Brant WE, Helms CA, editors. Fundamentals of diagnostic radiology. 3rd ed. Lippincott Williams & Wilkins; 2007. pp. 336–89.
    1. Murfitt J, Robinson PJA, Whitehouse RW, et al. Textbook of radiology and imaging. 7th Ed. Churchill Livingstone; 2003. The normal chest: methods of investigation and differential diagnosis, in David Sutton Ed; pp. 1–56.
    1. Collins J. 7th ed. Lippincott Williams & Wilkins; 1998. Trachea, Normal anatomy; in Paul & Juhl’s Essentials of radiologic imaging; pp. 937–38. Ebook.

Source: PubMed

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