Tailoring Diagnostic Criteria for Hip and Knee Prosthetic Joint Infections

Overview

This study compared IDSA, ICM2018, and EBJIS diagnostic criteria for prosthetic joint infections (PJIs) of the hip and knee, finding that IDSA criteria are most accurate for early and knee PJIs, while ICM2018 and EBJIS criteria perform better for delayed and late infections. The findings emphasize the need to tailor diagnostic approaches based on infection timing and joint site.

Background

Periprosthetic joint infection (PJI) is a serious complication following hip and knee arthroplasty, with incidence rates ranging from 0.3% to 2.18%. Accurate diagnosis is essential for appropriate management and relies on clinical, microbiological, and laboratory parameters. Several scoring systems exist, including those from IDSA, ICM2018, and EBJIS, but consensus on the optimal criteria remains lacking, particularly regarding the timing of infection onset.

Data Highlights

Key Findings

• IDSA criteria demonstrated highest accuracy for diagnosing early PJI and infections involving the knee joint.
• ICM2018 and EBJIS criteria outperformed IDSA for delayed (90 days–2 years) and late (>2 years) PJI cases.
• Culture positivity was highest in early PJI cases, with intraoperative cultures positive in 80% overall.
• Common pathogens varied by timing: MSSA and CoNS predominated early and delayed infections, while late infections often involved CoNS, MSSA, Streptococcus species, and Cutibacterium acnes.
• Clinical signs such as fever, purulence, and sinus tract presence did not significantly differ across early, delayed, and late infections.
• Time from symptom onset to diagnosis and from diagnosis to surgery varied by infection timing, with earlier intervention in early PJI.

Clinical Implications

Clinicians should consider the timing of PJI onset when selecting diagnostic criteria, using IDSA guidelines preferentially for early and knee infections, and ICM2018 or EBJIS criteria for delayed and late presentations. This tailored approach may improve diagnostic accuracy and guide appropriate management strategies. Awareness of common pathogens by infection timing can also inform empiric antimicrobial choices.

Conclusion

Diagnostic criteria for prosthetic joint infections should be adapted based on infection timing and joint site to optimize accuracy. A one-size-fits-all strategy is inadequate, and tailored approaches can enhance clinical decision-making.

References

1. Infectious Diseases Society of America (IDSA) Guidelines
2. International Consensus Meeting 2018 (ICM2018) Criteria
3. European Bone and Joint Society (EBJIS) Scoring System