Pressure injuries (commonly called bedsores or pressure ulcers) represent one of the most persistent and costly challenges in healthcare, affecting over 2.5 million US patients and costing almost $27B in 2019. Hospital-acquired pressure injury events occur in about 3% in general populations and about 6% in intensive care units (ICUs). Current prevention strategies still rely on the Braden Scale risk assessment tool, which was developed in the 80s to stratify patients into risk categories based on factors like sensory perception, moisture, mobility, and friction. Staff adherence to turning protocols remains stubbornly low at just under 50% nationally, creating a gap between prescribed care and actual implementation. Technologies to sense pressure injuries suffer from several significant limitations: they often provide discontinuous monitoring requiring manual interpretation, lack objective mobility metrics, and fail to account for the complex interplay between pressure distribution, patient movement patterns, and individual risk factors. The existing Braden Scale approach is particularly problematic as it doesn't account for the presence of existing pressure injuries or patient-specific factors, and has been shown to have inadequate validity for ICU patients. Additionally, current pressure mapping systems are typically large, expensive, and require specialized training, limiting their practical deployment in routine clinical care.

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