Mass casualty incidents expose critical gaps in healthcare system readiness. Current triage protocols (START, SALT) classify patients but do not allocate resources; AI systems optimize single facilities but ignore network-level distribution. This paper presents Graph-AI Crisis Medical Resource Allocation, a comprehensive framework combining: (1) Population-at-Risk PDFs calibrated from historical incident-fatality ratios, (2) Elliott Wave decomposition for temporal casualty prediction with Peak of Control (POC) identification, (3) Graph Neural Network allocation for autonomous bed/workforce/equipment distribution, and (4) Crisis Readiness Index (CRI)—a novel composite indicator of system robustness. Validation on two real-world calibrated scenarios demonstrates: Scenario A (Multi-Train Collision, 935 patients, 0.56:1 capacity ratio): 100% vs 81.6% admission (+18.4pp, zero rejections), peak occupancy 66.3% vs 100%. Scenario B (M7.2 Earthquake, 7,124 patients, 4.3:1 capacity ratio): 52.5% vs 43.9% admission (+8.6pp, 449 additional lives saved). All simulation results calibrated against EM-DAT earthquake database (15 events), NTSB/ERA transport records (13 events), and HAZUS-MH damage-to-casualty conversion rates.
Introduction
The text presents Graph-AI, a predictive crisis management framework designed to improve healthcare response during mass casualty incidents such as train collisions and earthquakes. Existing emergency systems are largely reactive and fragmented, focusing only on patient severity classification without optimizing hospital allocation, resource balancing, or demand forecasting.
Traditional systems such as START, SALT, and mSTART classify patients into severity categories (red, yellow, green, black) but do not determine which hospital patients should be sent to. AI-based triage systems optimize decisions within a single hospital but lack network-wide coordination, while operations research models assume static demand and cannot adapt dynamically during crises.
To solve these limitations, Graph-AI introduces a three-stage predictive crisis management framework:
Population and Casualty Prediction
Before incidents occur, the system builds probability density models using historical disaster data. When a crisis happens, expected casualties are estimated based on exposed population and historical injury ratios.
Facility and Workforce Activation
The framework automatically activates sleeper facilities such as private clinics, dental practices, and veterinary centers while mobilizing off-duty staff through a sigmoid-based activation curve that responds to forecasted demand.
Graph-Based Allocation and Dynamic Rebalancing
A graph neural network continuously allocates patients across hospitals based on travel time, available capacity, staffing, equipment, and case specialization. The system dynamically rebalances patients as conditions change.
A major innovation is the application of Elliott Wave theory, borrowed from financial market analysis, to model patient arrival waves during disasters. Casualties tend to arrive in clustered surges similar to trading volume peaks in financial markets. By predicting future “Peak Admission Points” (PAPs), the system can proactively reposition ICU staff, beds, and equipment several hours before patient surges occur.
The framework also introduces a Crisis Readiness Index (CRI), which measures healthcare system preparedness using:
Bed availability
Workforce availability
Equipment sufficiency
CRI categorizes system status into:
Robust (≥70%)
Stressed (40–69%)
Critical (<40%)
The methodology combines:
Statistical casualty prediction models
Elliott Wave temporal decomposition
Graph-based hospital optimization
Dynamic sleeper facility activation
Two experimental scenarios were tested:
Scenario A: Multi-Train Collision
3,500 exposed passengers
Estimated 935 injuries
Network of 8 hospitals + 4 sleeper facilities
Results showed Graph-AI achieved:
100% patient admission success
Zero rejections
Lower occupancy stress
Better CRI stability
Reduced operational cost
Compared to baseline systems, Graph-AI improved admissions from 81.6% to 100% through intelligent allocation and proactive resource activation.
Scenario B: Major Earthquake
M7.2 earthquake affecting 500,000 people
Estimated 7,124 survivors needing care
Severe infrastructure limitations
This scenario tested the framework under extreme overload conditions where demand far exceeded available capacity.
Conclusion
Graph-AI Crisis Medical Resource Allocation addresses the full lifecycle of mass casualty response: predictive casualty estimation via Population-at-Risk PDFs, temporal load forecasting via Elliott Wave with POC identification, autonomous network allocation via Graph Neural Network optimization, and real-time robustness assessment via Crisis Readiness Index.
Validation on two real-world calibrated scenarios demonstrates:
Scenario A (Multi-Train Collision, adequate capacity): 100% vs 81.6% admission (+18.4pp), zero rejections, peak occupancy 66.3% vs 100%.
Scenario B (M7.2 Earthquake, overwhelmed capacity): 52.5% vs 43.9% admission (+8.6pp), 449 additional lives saved.
Graph-AI overcomes six specific limitations of previous systems: (1) triage systems that classify but do not allocate, (2) AI systems that optimize single facilities without network awareness, (3) OR models that assume static demand, (4) lack of demand forecasting capability, (5) lack of network-level optimization, and (6) lack of a forward-looking robustness metric.
The framework is not a panacea for infrastructure inadequacy (Scenario B honestly demonstrates this), but it is necessary infrastructure for optimal use of whatever capacity exists. Together with capacity investment, Graph-AI enables healthcare systems to be demonstrably more robust in mass casualty incidents. The 449 additional lives saved in Scenario B represent real clinical value even when infrastructure is overwhelmed.
References
[1] Y. Kondo et al., \"Disaster medicine in Japan: Lessons from the 2015 Kumamoto earthquakes,\" Prehospital Disaster Med., vol. 31, no. 3, pp. 324-328, 2016.
[2] D. Frykberg, \"Medical management of disasters and mass casualties,\" Surg. Clin. North Am., vol. 76, no. 3, pp. 535-552, 1996.
[3] R. Lumpkin et al., \"SALT mass casualty triage: Concept endorsed by the American College of Emergency Physicians,\" Ann. Emerg. Med., vol. 52, no. 2, pp. 169-170, 2008.
[4] Chao et al., \"DeepTriage: Interpretable prioritization of mobile health alerts,\" Proc. ACM Interact. Mob. Wearable Ubiquitous Technol., vol. 3, no. 2, pp. 1-26, 2019.
[5] Ismail et al., \"NIGHTINGALE: Comprehensive tool for hospital management during mass casualty incidents,\" Comput. Methods Biomech. Biomed. Eng., vol. 22, no. 7, pp. 703-712, 2019.
[6] A. Olivia et al., \"Genetic algorithm-based optimization for emergency resource allocation,\" Appl. Soft Comput., vol. 98, p. 106887, 2021.
[7] L. Zhang et al., \"Robust optimization for mass casualty incident response with uncertain demand,\" Eur. J. Oper. Res., vol. 296, no. 2, pp. 587-602, 2022.
[8] R. Coburn and R. Spence, Earthquake Protection, 2nd ed. Chichester, UK: Wiley, 2002.
[9] FEMA, \"HAZUS-MH Technical Manual,\" Federal Emergency Management Agency, 2021.
[10] D. Frykberg and J. Tepas, \"Terrorist bombings: Lessons learned from Belfast to Buenos Aires,\" Ann. Surg., vol. 208, no. 5, pp. 569-576, 1988.
[11] WHO, \"World Health Organization Choosing Interventions that are Cost-Effective (WHO-CHOICE),\" WHO Database, Geneva, 2023.
[12] CRED, \"EM-DAT: The International Disaster Database,\" Centre for Research on the Epidemiology of Disasters, 2024. [Online]. Available: www.emdat.be
[13] NTSB, \"National Transportation Safety Board Accident Investigation Reports,\" NTSB, 2024. [Online]. Available: www.ntsb.gov
[14] ERA, \"European Railway Agency Safety Reports,\" ERA, 2024. [Online]. Available: www.era.europa.eu
[15] USGS, \"Earthquake Hazards Program Population Exposure,\" U.S. Geological Survey, 2024. [Online]. Available: www.usgs.gov/earthquakes
[16] R.N. Elliott, \"The Wave Principle,\" 1938. [Reprinted in R. Prechter, Elliott Wave Principle, 5th ed. Gainesville, FL: New Classics Library, 1978.]
[17] P.H. Franses and R. Paap, Periodic Time Series Models. Oxford: Oxford University Press, 2005.
[18] R.S. Sutton and A.G. Barto, Reinforcement Learning: An Introduction, 2nd ed. Cambridge, MA: MIT Press, 2018.
[19] S. Russell and P. Norvig, Artificial Intelligence: A Modern Approach, 4th ed. Boston, MA: Pearson, 2020.
[20] J.A. Hanley and B.J. McNeil, \"The meaning and use of the area under a receiver operating characteristic (ROC) curve,\" Radiology, vol. 143, no. 1, pp. 29-36, 1982.