IDSA/ATS Severe CAP Criteria — JoyShine Medical

IDSA/ATS Severe Community-Acquired Pneumonia Criteria

Applies the ATS/IDSA criteria for severe community-acquired pneumonia (one major or several minor criteria) to decide whether a patient warrants ICU-level care.

Respiratory failure requiring mechanical ventilation (MAJOR)

Septic shock requiring vasopressors (MAJOR)

Respiratory rate ≥ 30 breaths/min (MINOR)

PaO₂/FiO₂ ratio ≤ 250 (MINOR)

Multilobar infiltrates (MINOR)

Confusion / disorientation (MINOR)

Uremia (BUN ≥ 20 mg/dL) (MINOR)

Leukopenia (WBC < 4000 cells/µL, due to infection) (MINOR)

Thrombocytopenia (platelets < 100,000 cells/µL) (MINOR)

Hypothermia (core temperature < 36°C) (MINOR)

Hypotension requiring aggressive fluid resuscitation (MINOR)