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Imaging Studies I: CT and MRI

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Related Experiment Video

Updated: Jul 12, 2026

Combined In vivo Optical and µCT Imaging to Monitor Infection, Inflammation, and Bone Anatomy in an Orthopaedic Implant Infection in Mice
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Preoperative MRSA screening using a simple questionnaire prior elective total joint replacement.

Fidelius Von Rehlingen-Prinz1,2, Michael Röhrs1, Nemandra Sandiford1

  • 1Department of Orthopedic Surgery, Helios ENDO-Klinik Hamburg, Holstenstrasse 2, 22767, Hamburg, Germany.

Archives of Orthopaedic and Trauma Surgery
|April 23, 2024
PubMed
Summary

A standardized questionnaire effectively identifies patients at high risk for MRSA colonization before joint replacement surgery. This targeted screening reduces costs and may lower the risk of periprosthetic joint infection.

Keywords:
MRSAPeriprosthetic joint infectionStaphylococcus aureusSurgical site infectionTargeted screeningUniversal screening

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Area of Science:

  • Orthopedic Surgery
  • Infectious Disease Epidemiology
  • Healthcare Management

Background:

  • Methicillin-resistant Staphylococcus aureus (MRSA) colonization poses a risk for surgical site infections, particularly in joint replacement procedures.
  • Standardized protocols for preoperative identification of MRSA colonization are crucial for patient management.
  • Evaluating the effectiveness and cost-efficiency of screening methods is essential.

Purpose of the Study:

  • To assess a standardized protocol for preoperative MRSA colonization identification in patients undergoing hip and knee replacements.
  • To evaluate the efficacy of a risk-assessment questionnaire in identifying high-risk patients for MRSA screening.
  • To analyze the cost savings associated with targeted MRSA testing versus universal screening.

Main Methods:

  • A cohort of 37,745 patients awaiting elective joint replacement were assessed using a standardized questionnaire.
  • Questionnaire data was analyzed to identify effective questions for MRSA risk stratification.
  • The impact of comorbidities and Charlson Comorbidity Index on MRSA colonization was evaluated.
  • Cost analysis compared targeted testing with universal screening.

Main Results:

  • Of 37,745 patients, 8,057 (21.3%) were screened, with 65 (0.81%) testing positive for MRSA.
  • Key indicators for MRSA colonization included recent hospitalization (47.7%) and prior MRSA history (44.6%).
  • Targeted testing resulted in a 79% cost reduction compared to universal screening.

Conclusions:

  • A simple, standardized questionnaire is a valuable tool for preoperative MRSA screening.
  • The questionnaire effectively identifies high-risk patients for MRSA colonization.
  • This targeted approach may reduce the incidence of periprosthetic joint infection and related complications.