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Related Experiment Videos

Use of fibrinolytic agents to coat wire implants to decrease infection. An animal model

D A Nakamoto1, J R Haaga, P Bove

  • 1Department of Radiology, University Hospitals of Cleveland, OH 44106, USA.

Investigative Radiology
|June 1, 1995
PubMed
Summary
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Coating stainless steel implants with heparin or urokinase-heparin significantly reduced infection rates in a hamster model. Heparin coating may inhibit bacterial adherence, offering a promising strategy for preventing implant-associated infections.

Area of Science:

  • Biomaterials Science
  • Infectious Diseases
  • Surgical Innovation

Background:

  • Metallic prosthesis implantation is prone to infection, often requiring device removal.
  • Bacterial contamination poses a significant risk for patients undergoing surgery with implants.

Purpose of the Study:

  • To evaluate the efficacy of fibrinolytic agent coatings on stainless steel implants.
  • To determine if heparin or urokinase-heparin coatings can prevent infection after bacterial contamination in an animal model.

Main Methods:

  • Stainless steel wire implants were coated with plain, heparin, or urokinase-heparin.
  • Implants were contaminated with Staphylococcus epidermidis and implanted into hamsters.
  • Infection rates were assessed via quantitative cultures of explanted tissues after one week.

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Main Results:

  • Heparin-coated (40%) and urokinase-heparin-coated (50%) implants showed significantly lower infection rates than uncoated controls (0%).
  • The difference in noninfectivity rates between heparin and urokinase-heparin coated implants was not statistically significant.
  • P < 0.001 indicated a significant reduction in infection for coated implants compared to controls.

Conclusions:

  • Both heparin and urokinase-heparin coatings significantly decrease infection rates compared to uncoated stainless steel.
  • Heparin coating may prevent bacterial adherence to the implant surface.
  • Urokinase coating may offer additional, though not statistically significant, protection against infection.