2018 ICM Periprosthetic Joint Infection Definition
2018 ICM definition of periprosthetic joint infection (Parvizi 2018).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Major criterion
- No
- Elevated CRP or D-dimer
- No
- Elevated ESR
- No
- Elevated synovial WBC or leukocyte esterase
- Yes
- Positive alpha-defensin
- Yes
- Elevated synovial PMN%
- No
- Elevated synovial CRP
- No
Result: 2018 ICM PJI minor-criteria score 6 — infected (>= 6).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Major
- Sinus tract or >= 2 cultures with the same organism = infected.
- 0-5
- Preoperative minor-criteria score: 0-1 not infected, 2-5 inconclusive.
- >= 6
- Infected. A definition, not a treatment order.
What you enter
- Major criterion: sinus tract or ≥ 2 cultures with the same organism
- Elevated CRP or D-dimer (+2)
- Elevated ESR (+1)
- Elevated synovial WBC or leukocyte esterase (+3)
- Positive alpha-defensin (+3)
- Elevated synovial PMN% (+2)
- Elevated synovial CRP (+1)
How this is calculated
Parvizi J, Tan TL, Goswami K, et al. The 2018 definition of periprosthetic hip and knee infection: an evidence-based and validated criteria. J Arthroplasty. 2018;33(5):1309-1314.e2. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.