We evaluated a prototype high-band UWB-BAN using several vital information sensors in a hospital. We confirmed by experiments that setting one coordinator near the ceiling or back or forward of the bed and another coordinator under the bed is better solution when the patient lies on a bed. A helical antenna with a high antenna gain along the axial direction, when used in the coordinator showed better radiation performance and less dependence on the direction of the sensor node antenna than a biconical antenna. Next we applied new version of prototype with smaller size of hub and sensor node with more mobility models in a hospital attaching a hub and sensor nodes on the body and confirmed the communication worked well. We also examined the interference by other wireless communication system and medical device and optimized the sequence length to get maximum data rate and satisfying the packet rate and suppressing the interference under multi BAN by numerical analysis.