Measurement of Tracheobronchial Tree Using Multiplane CT Reconstructions to Guide Selecting Double-lumen Tubes
试验速览
- 阶段
- 不适用
- 入组人数
- 400
- 试验地点
- 1
- 主要终点
- right upper lobe orifice
研究概览
简要总结
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.
详细描述
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.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Retrospective
入排标准
- 年龄范围
- 18 Years 至 80 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •3D- thoracic CT scan images obtained between March 1st and October 31th, 2016
排除标准
- •younger than 18
- •with intraluminal lesions in main bronchus
- •with abnormalities of tracheobronchial tree
- •with history of tracheobronchial injury or surgery
- •diagnosed musculoskeletal deformity.
结局指标
主要结局
right upper lobe orifice
时间窗: through study completion, an average of 1 year
the angle between the center of the right main bronchus and right upper lobe orifice in axial image
次要结局
- length of right and left main bronchus(through study completion, an average of 1 year)
研究者
Jae-Hyon Bahk, MD, PhD
Professor
Seoul National University Hospital