Objective:To investigate better technique in exposing of the internal mammary vessels,and estimate the value of this technique simultaneously.Methods:9 patients from October 2008 to june 2010 who received the new exposing technique of internal mammary vessels were included as the test group.Another 16 patients using the traditional technique were included as the control group Then the time spent on exposing and the recipient complication rates were recorded.Results:The mean time cost of the exposing in the test group was (0.44±0.17)h,while in the control group it was (0.65+0.19)h (P＜0.05).