A Modified System for Classifying the Bilateral Superior Pulmonary Veins Using Three-dimensional Computed Tomography Bronchography and Angiography Images

Overview

Journal J Thorac Dis

Publisher AME Publishing Company

Specialty Pulmonary Medicine

Date 2021 Nov 19

PMID 34795941

Citations 8

Authors

Jun Wang

Haoran Lin

Chengyu Bian

Zhipeng Chen

Jingjing Huang

Yang Xia

Weibing Wu

Quan Zhu

Mei Yuan

Liang Chen

Affiliations

Soon will be listed here.

Abstract

Background: Identifying the distribution of pulmonary veins with three-dimensional reconstruction images is of great significance for surgical guidance. Existing models neglect the consistency of the bilateral superior pulmonary veins (SPVs) and lack a simple unified classification pattern. This study aimed to analyze the distributional features of bilateral SPVs, based on a cohort of patients undergoing CT examination.

Methods: The three-dimensional computed tomography bronchography and angiography (3D-CTBA) images of 1,520 cases were retrospectively analyzed. The reconstructed images of the right upper lobes were read in 715 cases, and left upper lobes in 805 cases. Through symmetrical analysis, the circulation of main venous branches and the spatial relationships of confluences with adjacent bronchus were compared.

Results: The SPVs of bilateral upper lobes showed common distributional features and were divided into three main types. The central vein type, the semi-central vein type, and the non-central vein type accounted for 83.35% [596], 7.84% [56], 8.11% [58] of the 715 cases with right scanning, and 25.71% [207], 62.61% [504], 10.81% [87] of the 805 cases with left scanning, respectively. There were 5 (0.70%) cases with rare variations in the right upper lobe and 7 (0.87%) in the left upper lobe. The attribution of intersubsegmental vein in the posterior segment (Vb) and its position relative to the anterior segmental bronchus (B) was the basis of classification in the right upper lobe, and the attribution of intersubsegmental vein in the apicoposterior segment (Vc) and its position relative to B was the basis of classification in the left upper lobe. In this classification system, the branching pattern of the intersegmental vein between the apical segment and the anterior segment (Vb) in the right upper lobe, and the intersegmental vein between the apicoposterior segment and the anterior segment (Va) in the left upper lobe were used for subdivision.

Conclusions: Our modified system had a high degree of consistency in classifying SPVs in bilateral upper lobes, thus providing guidance for preoperative and intraoperative procedures.

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