The research direction of medical papers includes retrospective research, prospective research and topic selection of general medical papers. According to relevant data, there are three major directions for the selection of medical papers: the selection of retrospective studies, the selection of prospective studies and the selection of general medical papers.

1, retrospective study is to summarize, analyze and summarize the case data of one's own experience in a certain period of time in the past, or to collect the case data of a certain disease admitted to our unit at a certain stage as a subject.

2. Prospective study: The original data used are obtained strictly according to the scientific method of experimental design, and the topic selection is not limited by the accumulated data in the past, so the topic selection has great activity and randomness.

3. The topics of general medical papers have three directions: literature, clinic and innovation.