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Long-term antifouling surfaces for urinary catheters.

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New plasma-enhanced chemical vapor deposition (PE-CVD) coatings create polyethylene glycol (PEG)-like thin films on urinary catheters, effectively preventing bacterial attachment and reducing complications for patients.

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Area of Science:

  • Biomaterials Engineering
  • Infectious Disease Prevention
  • Surface Chemistry

Background:

  • Bacterial infections are a significant complication in patients requiring indwelling urinary catheters.
  • Catheter-associated bacteriuria and blockage necessitate advanced prevention strategies.
  • Current solutions for catheter-related infections remain limited, driving research for novel approaches.

Purpose of the Study:

  • To synthesize polyethylene glycol (PEG)-like thin films using a custom plasma-enhanced chemical vapor deposition (PE-CVD) method.
  • To investigate the long-term antifouling properties of these PEG-like coated catheters against common bacterial pathogens.
  • To evaluate the efficacy of the coating in preventing bacterial adhesion and protein attachment without toxicity.

Main Methods:

  • Synthesis of PEG-like thin films via plasma-enhanced chemical vapor deposition (PE-CVD).
  • Contact angle measurements to assess surface wettability and plasma exposure effects.
  • Long-term (up to 30 days) antifouling tests against *Escherichia coli* and *Proteus mirabilis*.
  • Surface characterization using Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), and Fourier-Transform Infrared (FTIR) spectroscopy.

Main Results:

  • Contact angle analysis indicated increased surface wettability with higher plasma exposure.
  • PE-CVD coated PEG-like thin films demonstrated significant reduction in bacterial attachment over 30 days.
  • The coatings also showed reduced protein attachment.
  • No toxic effects were observed on the bacterial strains tested.

Conclusions:

  • PE-CVD synthesized PEG-like thin films offer a promising long-term antifouling solution for urinary catheters.
  • These coatings effectively inhibit bacterial adhesion and protein fouling without cytotoxicity.
  • This technology has the potential to reduce catheter-associated infections and improve patient outcomes.