US Patent 11436829 Head-mounted display device for use in a medical facility

A head-mounted display device interfaces with a blood processing machine. The display device has a frame for mounting on a person's head and configured to hold a lens in front of an eye of a wearer. The display device has a display, a wireless circuit configured to communicate with a network, a camera, and a processing circuit. The processing circuit retrieves instructions for servicing the blood processing machine and overlays indicators, text, highlighting and/or icons on the blood processing machine as seen from a field of view of the wearer based on the instructions. The wearer is thereby assisted in servicing the blood processing machine.