The Ongoing Struggle to Find a Gold Standard for PJI Diagnosis

Area of Science:

• Orthopedic Surgery
• Infectious Diseases
• Biomarker Discovery

Background:

• Periprosthetic joint infection (PJI) is a severe complication of joint arthroplasty.
• Accurate diagnosis of PJI is critical due to significant patient and healthcare costs associated with misdiagnosis.
• No single diagnostic test currently meets gold standard requirements for PJI detection.

Purpose of the Study:

• To review current diagnostic techniques and technologies for PJI.
• To evaluate the accuracy of various biomarkers (serum, synovial, tissue) and molecular methods.
• To identify limitations and future directions for PJI diagnostics.

Main Methods:

• Systematic review of diagnostic techniques for PJI.
• Analysis of serum biomarkers: C-reactive protein, Interleukin-6, procalcitonin, D-dimers, ICAM-1.
• Evaluation of synovial biomarkers: antimicrobial peptides, lipocalin-2, leukocyte esterase, calprotectin.
• Assessment of tissue biomarkers: Toll-like receptors, CD15.
• Review of molecular techniques: Polymerase Chain Reaction (PCR), Metagenomic Next-Generation Sequencing (mNGS).

Main Results:

• Multi-criteria diagnostic protocols integrating clinical, paraclinical, and molecular findings enhance PJI diagnostic accuracy.
• Various biomarkers show promise but have limitations in sensitivity and specificity.
• Advanced molecular techniques like mNGS offer potential for pathogen identification but require further validation.

Conclusions:

• Current diagnostic approaches for PJI rely on combined criteria due to the lack of a definitive gold standard test.
• Further development of novel detection technologies is essential to enhance the accuracy and efficiency of PJI biomarkers.
• Future research should focus on improving biomarker performance and integrating advanced molecular diagnostics for reliable PJI detection.