RESUMEN
Objective:To design a method of similarity duplicate checking for structured electronic medical record so as to solve the problem of quality control of illegal copy in structured electronic medical records.Methods:To define the duplicate checking property of document template and document segment of structured electronic medical record, and adopt knuth-morris-pratt (KMP) of minimum ratio of similitude to achieve duplicate checking for similar medical record and look up medical records that were copy by using deregulation method.Results:It can find medical records with similar ratio greater than a fixed threshold from structured electronic medical records, and check the similarity of illegally copied medical records.A total of 173 copies of illegally copied medical records were found from more than3500 medical records.Conclusion:The similarity duplicate checking method of structured electronic medical records can realize look up medical record that is copied by using deregulation from structured electronic medical record files, and can effectively control quality of medical records of hospital.