Medical Technologists Act Article 26

Medical examination clinics shall keep the records of examination results, examination slips issued by physicians, duplicate copies of examination reports and medical examination quality control records for at least three years.
中文原文 醫事檢驗師法第26條
醫事檢驗所對檢驗結果紀錄、醫師開具之檢驗單、檢驗報告副本及醫事檢驗品管紀錄,應至少保存三年。

English translation for reference only; the Chinese text prevails. Not legal advice.