The investigator applies the test device to the appropriate subjects for a total of 10 days (+1 days) at the institution and nursing hospital, and upon discharge for long-term follow-up investigation, the investigational device is applied at subjects' home according to the subject's consent for about 3 months.
For Deep Vein Thrombosis (DVT) risk groups, the effect and safety of blood circulation improvement before and after application are evaluated using an investigational device (model name CGM MB-1701).