Results: as the result of implementation of QC, the rate of successful intra operative cholangiography was raised significantly, with poor visualization as low as 6%.

结果：由于QC的较好实施，提高了术中胆道造影的成功率，显示不佳者仅占6%。

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Operation technique was summarized and the successful operative rate, the postoperative survival rate and the operative complications were observed.

总结手术技巧，观察手术成功率和术后生存率以及手术并发症。

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