A Prototype Computer Program that Integrates Predictive Models and Medical Handbooks for Altitude, Cold Exposure, and Heat Stress

First, a brief overview is provided of the current state of USARIEM algorithms for predicting the physiologic strain and weather related casualty rates associated with exposure to hot or cold environments. Next, a prototype software program is described that demonstrates the technical feasibility of consolidating numeric models for altitude, cold, and heat strain with operationally oriented handbooks for environmental physiology and medicine. This software program is a unified and dynamic environmental medicine and physiology computer-based tool of potential use for military medical personnel in predeployment analysis, planning, and training. The program's altitude module utilizes a simplified model of hypoxic strain. The altitude model does not yet include closed-loop feedback physiologic mechanisms or altitude illness prediction. These are areas requiring further altitude modeling efforts. The cold strain module's data structures and input-output interfaces were designed for USARIEM's lumped-parameter cold digit model. The heat strain module employs the well-established USARIEM Heat Strain Algorithm with an expanded interface that provides improved flexibility with regard to data entry and display modes. On-line medical handbooks provide narrative, tables, and reference lists. These could be enhanced with interactive tutorials for use in medical training situations.