A Continuous Intelligent Health-Status Monitoring Device

Real time monitoring of patients with traumatic injuries is essential for determination of triage categories, evacuation priority, and required interventions. A portable, non-invasive monitoring device can provide significant field information for first responders and significantly improve survivability by estimating a patient's real-time status and prognosis. In order to facilitate real-time assessment of traumatic injuries, PERL Research proposes the development of a noninvasive wireless portable device running an expert system for real-time, continuous estimation of a patient's health status - STAT-MON (Status Monitor). The device will be based on a configurable model of an autonomous nervous system that will be automatically configured to a given user during initial measurement, and used to track deterioration of user's state in multidimensional feature space and physiological compensation to hemorrhage. The main input to the system will be parameters of heart rate variability (HRV), blood pressure, breathing, and baroreflex sensitivity. The system will be used to characterize the low-frequency oscillations (Mayer waves) of heart rate variability and blood pressure created as a result of the decreased central blood volume.