Fig. 3: Pressure distribution on the skin interface at the sacrum.

A Photograph of a sacral pressure monitoring device with labels of pressure sensor sites (P1–P7). B FEA simulation models for pressure distributions at the skin interface for a subject lying on a bed. C Pressure distribution at the sacrum with and without the device. D Comparison of pressure at each sensor location with and without the device. E Representative pressure profiles of a patient lying on a bed in the operating room. F Areal mapping of the average pressure measurement from (E). The cushion is made of soft polymer foam, and its elastic modulus is given in Table S3.