1) products lack professional knowledge in clinic. It is difficult to know what problems will be encountered when the product is tried out, such as case selection, scope of application, clinical contraindications,
2) After clinical statistics. Many enterprises do not fully understand the application and data processing of professional statistical tools, and it is difficult to correctly handle all statistical data.
3) Communicate with the hospital and clinical supervision in time. Hospitals are busy, enterprise staff are busy, and communication is not enough.