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The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
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A decreasing function describes a relationship where the output consistently declines as the input increases. This means that for any two input values, if one is greater than the other, the corresponding output is smaller. Mathematically, a function f is decreasing on an interval I if for every x1 < x2​ in I, f (x1) > f (x2). This type of behavior is visually identified on a graph that slopes downward from left to right.The nature of a function can be analyzed by calculating...
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Structural Joints: Synovial Joints01:16

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Author Spotlight: Advancing Research on Candida albicans Biofilm-Associated Prosthetic Joint Infections
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Intrawound vancomycin in primary hip and knee arthroplasty: a safe and cost-effective means to decrease early

Nick N Patel1, George N Guild1, Arun R Kumar1

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Arthroplasty Today
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PubMed
Summary

Intrawound vancomycin significantly reduced periprosthetic joint infection (PJI) rates in hip and knee arthroplasty patients. This safe, cost-effective method shows promise for preventing infections after joint replacement surgery.

Keywords:
InfectionPrimary arthroplastyVancomycin

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Area of Science:

  • Orthopedic Surgery
  • Infectious Disease
  • Pharmacology

Background:

  • Periprosthetic joint infection (PJI) is a serious complication following hip and knee arthroplasty.
  • Limited data exists on intrawound vancomycin use in arthroplasty compared to spine surgery.
  • This study evaluates the efficacy and safety of intrawound vancomycin in arthroplasty.

Purpose of the Study:

  • To investigate the effectiveness of intrawound vancomycin in reducing PJI rates.
  • To assess the safety profile of intrawound vancomycin in arthroplasty.
  • To determine the cost-effectiveness of using intrawound vancomycin.

Main Methods:

  • Retrospective review of 460 primary total hip and knee arthroplasties.
  • Comparison of infection rates, readmissions, and complications between patients who received intrawound vancomycin and those who did not.
  • Analysis of cost data, including the number needed to treat (NNT).

Main Results:

  • The vancomycin group showed significantly lower overall infection rates (0.57% vs 2.7%) and PJI rates (0.29% vs 2.7%).
  • No statistical difference in ototoxicity or acute kidney injury was observed.
  • The cost to prevent one infection was calculated at $816, with an NNT of 47.5.

Conclusions:

  • Intrawound vancomycin appears to be a safe and cost-effective strategy for reducing PJI in early follow-up.
  • Further prospective studies are recommended to validate these findings.
  • Intrawound vancomycin shows promise as an adjunct in preventing PJI after arthroplasty.