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Measurement of Tracheobronchial Tree Using 3D CT

NCT ID: NCT03378180

Last Updated: 2017-12-19

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Total Enrollment

400 participants

Study Classification

OBSERVATIONAL

Study Start Date

2017-12-25

Study Completion Date

2018-03-30

Brief Summary

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Anatomical variations of right main bronchus have been discouraged anesthesiologists' use of right-sided double lumen tubes to facilitate one-lung anesthesia. However, there are absolute indications of right-sided DLTs surgically, such as left pneumonectomy or in cases with left main endobronchial lesions.

With recent advances of 3-dimensional spiral CT reconstruction technique, the investigators conducted this retrospective study to measure accurate length of right and left main bronchus and the angle between the center of the right main bronchus and right upper lobe orifice in axial image to help choosing and further manufacturing right-sided double-lumen tubes.

Detailed Description

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All CT images will be reviewed using the image measurement software with a slice thickness of 1 mm. A level of -450 Hounsfield units and a width of 1000 Hounsfield units were used for bronchial window settings.

The length of right and left main bronchus will be measured from the tracheal bifurcation to the point of their first branches, respectively, in both 2D- and 3D-CT images. The anteroposterior angulation of right upper lobar bronchus will be measured from the axial 2D-images by the angle between the horizontal midline of the right main bronchus and the center of the RUL orifice which indicates the origin of the RUL bronchus in which the right upper lobar bronchus shows maximal diameter.

Conditions

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Double Lumen Tube Computed Tomography

Study Design

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Observational Model Type

COHORT

Study Time Perspective

RETROSPECTIVE

Eligibility Criteria

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Inclusion Criteria

* 3D- thoracic CT scan images obtained between March 1st and October 31th, 2016

Exclusion Criteria

* younger than 18
* with intraluminal lesions in main bronchus
* with abnormalities of tracheobronchial tree
* with history of tracheobronchial injury or surgery
* diagnosed musculoskeletal deformity.
Minimum Eligible Age

18 Years

Maximum Eligible Age

80 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Seoul National University Hospital

OTHER

Sponsor Role lead

Responsible Party

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Jae-Hyon Bahk, MD, PhD

Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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Seoul National University Hospital

Seoul, , South Korea

Site Status

Countries

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South Korea

Other Identifiers

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JHBahk_RUA

Identifier Type: -

Identifier Source: org_study_id