Leo’s heart raced. Pneumonia? Sepsis? Maybe a metabolic derangement like hyponatremia? The possibilities swirled in a caffeinated blur. He ducked into the staff room for a split second and pulled a small, familiar paperback from his deep coat pocket: .

He entered Bay 4 with newfound focus. He spoke with the patient, noted the tachypnea, and checked the latest blood results on the monitor. Urea was elevated. Blood pressure was borderline. Using the "Pocket Essentials" as his mental scaffolding, he calculated a CURB-65 score of 3—high risk.

He flipped quickly to the "Respiratory Disease" chapter, scanning the succinct notes on clinical emergencies. His eyes landed on the for pneumonia severity—Confusion, Urea, Respiratory rate, Blood pressure, and age over 65. It was all there, laid out in the logical, easy-to-follow format he had come to rely on during his revision.

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