The rates of preoperative inexpectant disease finding decreased.

术前未预期疾病发现率有所降低。

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Results The rates of biliary duct abnormality, preoperative diagnosis change, preoperative inexpectant disease finding, bile injury and residual stone were 3.5%, 4.4%, 2.4% and 0%, respectively.

结果胆道畸形率3 .5 % ，术前诊断改变率4.4% ，术前未预期疾病发现率2 .4% ，胆道损伤率及残留结石率为零。

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