A tool to support the clinical decisions of doctors and health professionals, not for self-diagnosis or self-treatment.
This calculator is inside the patient's file in Clinicato: open it from "Medical tools" while you chart the visit, it fills in from the patient's details and vital signs where they are recorded, and adds its result to the visit's plan in one tap, with the "Medical tools" add-on. Try it in your clinic
Calculator
How it works and when to use it
One point each for: confusion, urea over 7 mmol/L, respiratory rate 30 or more, systolic under 90 or diastolic 60 or less, and age 65 or more, and the calculator takes urea or BUN in their units.
By the British Thoracic Society (BTS): 0 to 1 low risk, often home treatment, 2 consider hospital treatment, 3 to 5 severe pneumonia needing hospital and ICU assessment at 4 or 5, and without urea CRB-65 is used.
Reference: Lim WS et al. Thorax 2003;58:377-82; BTS guidelines for community acquired pneumonia in adults (2009)
Frequently asked questions
When do I use CRB-65?
In the clinic when no urea result is at hand, it is the score the BTS suggests for primary care.
Does it replace clinical judgement?
No, low oxygen, chronic disease and social circumstances can call for admission despite a low score.
Tools you may also need
- Wells score for PE calculator The Wells score and the probability of PE in both models.
- Pack-years calculator Pack-years, and whether they meet the lung cancer screening criterion.
- Body surface area (BSA) calculator Body surface area in m² by two formulas.
- Ideal and adjusted body weight (Devine) Ideal weight, actual weight as a percentage of it, and adjusted weight.
- Creatinine clearance calculator Creatinine clearance in mL/min with three weights.
- eGFR calculator eGFR in mL/min/1.73m² and its stage from G1 to G5.
Clinic software for this specialty
Try Clinicato for your clinic
These calculators are free here for everyone, and in Clinicato 49 medical tools work inside the patient's file with the "Medical tools" add-on: filled from the visit and the vital signs, with the result added to the visit's plan, next to appointments, prescriptions and invoices.