Pressure-Injury Repositioning Compliance (Too Still, Too Long)

A turn — by staff or by the resident — creates a short burst of movement over the bed that WiFi waves pick up clearly. Gentle breathing confirms the person is there even when perfectly still. If too much time passes with no turn at all, the system reminds the team.

In the physics: Spontaneous repositioning produces brief 1-10Hz Doppler bursts with in-bed spatial signature; staff-assisted turns show a two-person occupancy event (occupancy count r=0.9, proven) coinciding with high in-bed motion. Absence of any burst beyond the 2-hour turn protocol is directly measurable as a null in the bed-path Doppler channel while breathing-band energy confirms presence.