Study of Sub Carinal Angle of Human Trachea by Computerized Tomography

Khade, Bipinchandra; Waheed, Abdur Rafe Abdul; Yadav, Nisha; Diwan, Chaya V.

doi:10.16965/ijar.2016.346

Cited by 5 publications

(12 citation statements)

References 4 publications

(7 reference statements)

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“…Chunder and Guha [14] study found that the mean SCAs in the 0-15 years, 16-25 years, 26-40 years, 41-55 years, and >55 years age groups were 61.4°, 52.9°,49.2°, 48.2°, and 54° in females and 64.3°, 56.4°, 58.4°, 57.1°, and 59.5° in males. It concluded that in the adult group there was a decrease in the SCA with an increase in the age which was similar to the study conducted by Khade et al [10], who also demonstrated a decrease in the SCA with an increase in the age group which is similar to our study.…”

Section: Discussionsupporting

confidence: 93%

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Estimation of Subcarinal Angle Using Minimum Intensity Projection in Computed Tomography

Fernandes

Pradhan

2018

Asian J Pharm Clin Res

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Objectives: The main objective of the study was to determine the normal subcarinal angle (SCA) in an adult patient, to compare the relationship of SCA with patient gender and age, and to correlate the SCA with body mass index (BMI).Methods: A total of 193 subjects (109 males and 85 females) in the age group of 20–60 years scheduled for computed tomography thorax at the Department of Radiodiagnosis and Imaging, Kasturba Hospital, Manipal, were included in the study. Plain images were reconstructed into 1.4 mm reformatted image and processed into minimum intensity projection, and measurement was taken using angle tool. Mean and standard deviation was used to determine normal SCA, and independent t-test was used to compare the relationship of SCA with patient’s age and gender. “Pearson correlation” was used to correlate SCA with BMI.Results- The mean SCA of the adult patient was 69.75±3.38°. The mean SCA in female was 69.90±4.07° and in male was 69.63±2.75°. In the age group of 20–40 years, the mean SCA was 70.38±3.85°, and in the age group of 41–60 years, it was 69.25±2.88°.Conclusion: There was no relationship between SCA and patient’s gender; however, the mean SCA of the age group 20–40 was found greater than that of 41–60 which was statistically significant. BMI has no significant correlation with SCA.

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Section: Discussionsupporting

confidence: 93%

“…Extension of the head and elongation of bronchial tree by inspiration will cause the carinal angle to become narrow. On the other hand, shortening of the bronchial tree widens the carinal angle [10]. In our study, all the CT scans of the thorax were only taken in inspiration phase without extension of the head.…”

Section: Discussionmentioning

confidence: 98%

Estimation of Subcarinal Angle Using Minimum Intensity Projection in Computed Tomography

Fernandes

Pradhan

2018

Asian J Pharm Clin Res

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“…The trachea is a cylindrical cartilaginous tube meant for passage of air between larynx and lungs and extends superiorly from cricoid cartilage and ends inferiorly at carina. 1,2 It is about 10-11cm in length and extends from the level of sixth cervical vertebra to the upper border of fifth thoracic vertebra. 1 It divides into right and left principal bronchi which enter the corresponding lungs and progressively branch off throughout the entire lung to form trachea-bronchial tree.…”

Section: Introductionmentioning

confidence: 99%

“…1,2 It is about 10-11cm in length and extends from the level of sixth cervical vertebra to the upper border of fifth thoracic vertebra. 1 It divides into right and left principal bronchi which enter the corresponding lungs and progressively branch off throughout the entire lung to form trachea-bronchial tree. Subcarinal angle (SCA) is an angle of divergence between the right and left main stem bronchi.…”

Section: Introductionmentioning

confidence: 99%

Determination of subcarinal angle of trachea using computed tomography

et al. 2019

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Background: Change in tracheal bifurcation angle (subcarinal angle) is an indirect marker of various cardiac, pulmonary and mediastinal pathologies. Helical computed tomography (CT) allows acquisition of volumetric set of data of the chest and can be used for accurate measurements of subcarinal angle using reconstructed images on a workstation using minimum intensity projection (MinIP).The objective of this study was to estimate normal subcarinal angle (SCA) of trachea by computed tomography and to assess its relationship with gender.Methods: This was an observational study comprising a study cohort of 552 patients comprising of 312 males and 240 females who were subjected to CT chest for various indications in our department. Patients with no underlying cardiac, mediastinal or pulmonary disease were included in the study. Spiral CT scan of chest was performed on 64-slice seimens CT SOMATOM and images were reconstructed with thickness of 1.5mm and the images were viewed in coronal reformatted minimum intensity projection (MinIP) for determination of subcarinal angle using the angle measuring tool provided in the workstationResults: The mean subcarinal angle (SCA) in males was (67.60±14.55). The mean subcarinal angle (SCA) in females was (78.90±11.04). Females had a higher mean SCA compared to males with a statistically significant difference (p-value <0.05).Conclusions: The mean SCA in females was higher compared to males with a statistically significant difference between the two. This study holds practical relevance with regard to the performance of invasive trachea-bronchial procedures like bronchoscopy and tracheal/bronchial intubation.

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“…All previous studies measured SCA on the postero-anterior chest radiograph and coronal reformatted chest CT in respect to age, gender, thoracic index patient habitus and body mass index. [1][2][3][4][5][6][7][8][9][10] Previous studies have shown that SCA varies in relation to various independent factors like age, sex and patient habitus. The reference value mentioned by previous studies may not be extrapolated in our population.…”

Section: Introductionmentioning

confidence: 99%

Measurement of the Sub-carinal Angle on the Normal Chest Radiograph of Adult at BPKIHS, Dharan, Nepal

Gupta

Pant

et al. 2020

Jnl. BP Koirala Inst. Health Sci.

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Background: The sub-carinal angle is an angle formed between the main right bronchus and leftbronchus clearly seen in adequately exposed chest radiograph, normally at the level of 5th thoracicvertebrae. Objective: To measure sub-carinal angle in relationship to different age, sex and body mass index inthe adult. Methods: A cross-sectional study was carried out in the Department of Radio diagnosis and Imaging at BPKIHS, Dharan from 27th April to 6th August 2017. Sub-carinal angle was measured on the normal chest radiograph in 392 adult patients. The data were analyzed using SPSS Version 11.5 and descriptive statistics percentage, Mean, Standard Deviation were calculated. For inferential statistics, Independent ‘t’ test and Pearson’s correlation were applied. Results: The sub-carinal angle ranged from 39°- 81.1° with mean value 60.17°+7.81°. The mean subcarinalangle for the male was 59.17°+8.19° and for female was 60.62°+7.49°. The mean sub-carinalangle was wider in female than male in our study; however, the difference in sub-carinal angle between male and female was statistically not significant (p> 0.05). There was negative correlationbetween sub-carinal angle and age (r= -0.168, p <0.01). The sub-carinal angle was positivelycorrelated with BMI (r= 0.100, p< 0.05). Conclusion: In our study, the mean sub-carinal angle was 60.17° ± 7.81°. The mean sub-carinal angle difference between male and female was statistically non-significant. There was negative correlation of sub-carinal angle with age and positive correlation with BMI. The reference value obtained from this study will be helpful to diagnose abnormal sub-carinal angle due to various pathologies.

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Study of Sub Carinal Angle of Human Trachea by Computerized Tomography

Cited by 5 publications

References 4 publications

Estimation of Subcarinal Angle Using Minimum Intensity Projection in Computed Tomography

Estimation of Subcarinal Angle Using Minimum Intensity Projection in Computed Tomography

Determination of subcarinal angle of trachea using computed tomography

Measurement of the Sub-carinal Angle on the Normal Chest Radiograph of Adult at BPKIHS, Dharan, Nepal

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