ATS/IDSA Severe CAP Criteria

Identify severe community-acquired pneumonia requiring ICU admission using ATS/IDSA 2007 criteria. Major criteria (1 sufficient): invasive mechanical ventilation or septic shock. Minor criteria (>= 3 of 9): RR >= 30, PaO2/FiO2 <= 250, multilobar infiltrates, confusion, BUN >= 20, WBC < 4000, platelets < 100K, temp < 36 C, SBP < 90.

Weight
Height
Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Identify severe community-acquired pneumonia requiring ICU admission using ATS/IDSA 2007 criteria. Major criteria (1 sufficient): invasive mechanical ventilation or septic shock. Minor criteria (>= 3 of 9): RR >= 30, PaO2/FiO2 <= 250, multilobar infiltrates, confusion, BUN >= 20, WBC < 4000, platelets < 100K, temp < 36 C, SBP < 90

Each component has a specific meaning:

  • ATS/IDSA 2007 criteria — The ats/idsa 2007 criteria recorded for the scenario being assessed.

Note: Interpret the ats/idsa severe cap result against the thresholds and context described above.

How to Use

Enter the ATS/IDSA 2007 criteria for the scenario you are assessing. Identify severe community-acquired pneumonia requiring ICU admission using ATS/IDSA 2007 criteria. Major criteria (1 sufficient): invasive mechanical ventilation or septic shock. Minor criteria (>= 3 of 9): RR >= 30, PaO2/FiO2 <= 250, multilobar infiltrates, confusion, BUN >= 20, WBC < 4000, platelets < 100K, temp < 36 C, SBP < 90. Use the ats/idsa severe cap result to inform your calculation.

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Frequently Asked Questions