Abstract: Objective To investigate the role of root cause analysis（RCA） in improving the recognition rate of bar code in clinical laboratories. Methods RCA was used to analyze the root causes of frequent failures of bar code recognition and the bidirectional transmission of large-sized instruments. The corrective measures were formulated,which was compared with that before corrective measures. Results Bar code recognition rate was improved after RCA implementing（P<0.05）. Conclusions RCA plays a role in improving the recognition rate of bar code in clinical laboratories,and it can sort out the key points of adverse events. The continuous improvement of the quality of work before inspection and analysis is realized.

Key words: Root cause analysis, Clinical Laboratory, Bar code, Recognition rate