Welcome to International Journal of Anatomy and Research

Type of Article: Original Research

Year: 2016 | Volume 4 | Issue 3 | Page No. 2828-2832

Date of Publication: 30-09-2016

DOI: http://dx.doi.org/10.16965/ijar.2016.346

STUDY OF SUB CARINAL ANGLE OF HUMAN TRACHEA BY COMPUTERIZED TOMOGRAPHY

Bipinchandra Khade *1¹, Abdur Rafe Abdul Waheed ², Nisha Yadav ³, C.V.Diwan ⁴.

^*1 Assistant Professor, Department Of Anatomy,CMCH, Bhopal, India.

² Assistant Professor, Department Of Anatomy,GMC, Aurangabad, India.

³ Assistant Professor, Department Of Anatomy, CMCH, Bhopal, India.

⁴ Professor, Department Of Anatomy, DSCGMC, Nanded, India.

Address: Dr. Bipinchandra Khade, Assistant Professor, Department Of Anatomy,CMCH, Bhopal, India.
E-Mail: drbipinkhade@gmail.com

ABSTRACT

Introduction: The study of bronchial tree is done by both invasive and non-invasive techniques like cadaveric dissection, bronchograms, virtual bronchoscopy, Computed Tomography (CT) scan and Magnetic Resonance Imaging (MRI) scan.
Materials and Methods: The subcarinal angle of trachea was measured on chest CT scans of 110 normal adult individuals in the age group of 10-70 years (69 males and 41 females) attending the department of Radio-diagnosis at Government Medical College, Aurangabad.
Result: The mean value for subcarinal angle was 80.01 ± 12.53 in males, 79.75 ± 9.990 in females and  79.92 ± 11.600  in total study population.
The difference between means of subcarinal angle in male and female population was not significant statistically (‘p’ value=0.902).  In the age group 11-20 years, the differences between the mean values of subcarinal angle were affected by sex to a very small extent as compared to other age groups.
Discussion: It was observed that widening of the tracheal bifurcation angle had long been accepted as a sign of left atrial enlargement, but conflicting data are present about its reliability.
Conclusion: The mean value of subcarinal angle is independent of age and gender. This study is useful for clinicians to know the changes in left atrium and while doing  endotracheal intubation and bronchoscopy.
Key words: Trachea, Subcarinal angle, CT Scan.

REFERENCES

1. Standring S, editor. Gray's Anatomy. 40th Edition. Spain: Churchill Livingstone Elsevier; 2008.
2. Reed JM, O'Connor DM, Myer III CM. Magnetic resonance imaging determination of tracheal orientation in normal children. Otolaryngol Head Neck Surg. 1996;122:605-08.
3. Alavi SM, Keats TE, O’brien WM. The angle of tracheal bifurcation: its normal mensuration. Am J Roentgenol. 1970 Mar;108(3):546-49.
4. Chen JTT, Putman CE, Hedlund LW, Dahmash NS, Roberts L. Widening of the subcarinal angle by pericardial effusion. Am J Roentgenol.1982 Nov;139:883-87.
5. Haskin PH, Goodman LA. Normal tracheal bifurcation angle: a reassessment. Am J Roentgenol.1982 Nov;139:879-82.
6. Taskin V, Bates MC, Chillag SA. Tracheal carinal angle and left atrial size. Arch Intern Med.1991 Feb;151(2):307-08.
7. Murray JG, Brown AL, Anagnostou EA, Senior R. Widening of the tracheal bifurcation on chest radiographs: value as a sign of left atrial enlargement. Am J Roentgenol.1995; 164:1089-92.
8. Coppola V, Vallone G, Coscioni E, Coppola M, Maraziti G, Alfinito M, Di Benedetto G. Normal value of the tracheal bifurcation angle and correlation with left atrial volume. Radiol Med. 1998 May;95(5):461–65.
9. Karabulut N. CT assessment of tracheal carinal angle and its determinants. Brit J Radiol. 2005;78:787-90.
10. Kamel KS, Lau G, Stringer MD. In vivo and in vitro morphometry of the human trachea. Clin Anat. 2009;22:571-79.
11. Mrudula C, Krishnaiah M. The study of bronchial tree. International Journal of Pharma and Bio Sciences. 2011 Jan-Mar;2(1):B166-72.

Bipinchandra Khade, Abdur Rafe Abdul Waheed, Nisha Yadav, C.V.Diwan. STUDY OF SUB CARINAL ANGLE OF HUMAN TRACHEA BY COMPUTERIZED TOMOGRAPHY. Int J Anat Res 2016;4(3):2828-2832. DOI: 10.16965/ijar.2016.346