Describe the clinical symptoms of ARS. Enumerate the investigations required. Describe the comprehensive patient management of such cases.

Acute Radiation Syndrome (ARS) occurs after significant exposure to ionizing radiation, typically from a nuclear event or accident. The clinical symptoms of ARS are divided into four distinct phases: prodromal, latent, manifest illness, and recovery or death.

1. Prodromal Phase: This phase occurs within hours to days following exposure and is characterized by gastrointestinal (GI), hematologic, and neurologic symptoms. The severity depends on the radiation dose. Mild exposure leads to nausea, vomiting, fatigue, and headache, while higher doses may cause severe vomiting, diarrhea, _______ _________ ____ _____ ________ _________ ______ ______ ___ _____ ____.
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