结论 循序渐退法用于左侧双腔支气管插管，能够显著提高正确到位率。

Conclusions Compared with traditional auscultation method, gradual withdrawal method can effectively and safely improve the rate of correct ideal anatomic placement of L-DLT.

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目的应用旁气流通气监测法（SSS）观察双腔支气管导管插管患者围术期呼吸功能变化。

Objective To observe the changes of ventilation and respiratory dynamics in patients undergoing bronchial intubation with double channel catheter and monitored by Side Stream Spirometry(SSS).

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目的：评价一种右侧支气管双腔导管(- DLT)插管失败后行之有效的补救方法。

Objective: To investigate a new methods for intubation while the failure of right-sided double-lumen tube (R-DLT) intubation in the thoracic surgery.

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目的：评价一种右侧支气管双腔导管(- DLT)插管失败后行之有效的补救方法。

Objective: To investigate a new methods for intubation while the failure of right-sided double-lumen tube (R-DLT) intubation in the thoracic surgery.

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