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Updated: Feb 15, 2026
Novel Diagnostics in Revision Arthroplasty: Implant Sonication and Multiplex Polymerase Chain Reaction
Published on: December 3, 2017
Sonication of orthopaedic implants: A valuable technique for diagnosis of prosthetic joint infections
Sujeesh Sebastian1, Rajesh Malhotra2, Vishnubhatla Sreenivas3
1Department of Microbiology, All India Institute of Medical Sciences (AIIMS), New Delhi, India.
Introduction:
Accurate and prompt microbiological diagnosis of prosthetic joint infection (PJI) is crucial for successful antimicrobial treatment. Studies have shown the diagnostic utility of sonication of explanted implants in total joint arthroplasty but all did not use consensus statements for defining PJI. We evaluated the diagnostic utility of culture of samples obtained by sonication of explanted implants compared with periprosthetic tissue cultures (PTC) for the diagnosis of PJI using Musculoskeletal Infection Society (MSIS) consensus criteria. We also assessed the utility of culture of sonicate fluid for determining the microbial profile of PJI compared with standard culture methods.
Materials And Methods:
Forty consecutive revision arthroplasty cases were enrolled. Three to five periprosthetic tissue samples were obtained during each explant procedure. The 40 explanted implants were collected in sterile containers and sonicated under sterile conditions. MSIS criteria were used for the definition of PJI.
Results:
Twenty - seven patients had PJI and thirteen were aseptic failures. Of the PJI cases, there were nine cases of early PJI's, 10 of delayed PJI's and eight of late PJI's. Twenty-five (92.5%) of the twenty-seven patients with PJI, had positive cultures in the sonicate fluid of implants and in 18 (66.7%) of them cultures of the periprosthetic tissues were also positive. Both PTC and SFC cultures of implants were negative in all the 13 cases of aseptic failure. Sensitivity of sonicate fluid culture (SFC) of implants was greater than PTC (92.5% vs. 66.7%), P = .02. The specificity of both was 100%. The incidence of gram-positive and gram-negative bacteria was nearly equal by both methods. However, SFC showed an increased ability to detect Gram-positive pathogens which was evidenced by better recovery of coagulase-negative staphylococci.
Conclusions:
Sonication of explanted implants is a simple and valuable microbiological technique and its routine use improves the diagnostic sensitivity of PJI.
Insights
Sonication of explanted implants significantly improves prosthetic joint infection (PJI) diagnosis sensitivity compared to tissue cultures. This method is crucial for accurate microbiological profiling and successful PJI treatment.
Area of Science:
- Orthopedics
- Infectious Diseases
- Microbiology
Background:
- Accurate diagnosis of prosthetic joint infection (PJI) is critical for effective antimicrobial therapy.
- Previous studies indicated the diagnostic value of implant sonication, but lacked standardized PJI definition criteria.
- This study evaluates implant sonication fluid culture (SFC) against periprosthetic tissue culture (PTC) for PJI diagnosis.
Purpose of the Study:
- To assess the diagnostic utility of SFC compared to PTC for PJI detection using Musculoskeletal Infection Society (MSIS) criteria.
- To determine the effectiveness of SFC in identifying the microbial profile of PJI.
- To compare the sensitivity and specificity of SFC and PTC in diagnosing PJI.
Main Methods:
- Forty revision arthroplasty cases were analyzed.
- Periprosthetic tissue samples and explanted implants were collected.
- Implants were sonicated under sterile conditions, and MSIS criteria were applied for PJI definition.
Main Results:
- Sonication fluid culture (SFC) detected PJI in 92.5% of cases, significantly higher than periprosthetic tissue culture (PTC) at 66.7% (P=.02).
- Both methods demonstrated 100% specificity, with no positive cultures in aseptic failure cases.
- SFC showed enhanced detection of Gram-positive pathogens, including coagulase-negative staphylococci.
Conclusions:
- Routine sonication of explanted implants is a valuable microbiological technique that enhances PJI diagnostic sensitivity.
- SFC offers improved pathogen detection compared to traditional tissue cultures.
- This method aids in accurate microbiological diagnosis for better PJI management.
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