Objective: To explore the influence of intermittent segmental artery block on pathologic changes of intimal hyperplasia.

目的：探讨间歇性节段性动脉阻断对阻断段动脉内膜增生的影响。

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Results Vessels around T5-T11 passed through the lower part of corresponding vertebral body constantly, with the upper segmental veins, and lower segmental artery.

结果T5 ~ 11节段血管走行较为恒定，节段静脉在上、节段动脉在下，走行于对应椎体的中央偏下水平。

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Results:On the section through tracheal bifurcation, in front of the apicoposterior segmental vein, anterior segmental artery lay medioanterior to anterior segmental bronchus.

结果：在气管杈层面上，尖后段静脉居中，其前方，前段动脉居前段支气管的内前方；

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