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An evaluation of MRI safety and compatibility of a silver-impregnated antimicrobial wound dressing

John Nyenhuis1, Lian Duan

  • 1School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana, USA. nyenhuis@ecn.purdue.edu

Journal of the American College of Radiology : JACR
|June 30, 2009
PubMed
Abstract

Insights

Aquacel Ag, an ionic silver wound dressing, was tested for MRI safety. The dressing showed no adverse effects and is safe for use during MRI scans, ensuring patient care continuity.

Area of Science:

  • Medical Devices
  • Biomaterials
  • Radiology

Background:

  • Wound infections pose significant challenges to healing and patient quality of life.
  • Antibiotic resistance necessitates exploring alternative antimicrobial strategies like ionic silver.
  • Aquacel Ag is a hydrofiber dressing containing ionic silver, designed for effective wound exudate management.

Purpose of the Study:

  • To evaluate the magnetic resonance (MR) safety and compatibility of Aquacel Ag.
  • To assess the dressing's performance against American Society for Testing and Materials (ASTM) standards.
  • To determine if the dressing poses risks during MR imaging procedures.

Main Methods:

  • Radiofrequency-induced temperature changes were measured using an ASTM phantom at 123 MHz (3 T) and 64 MHz (1.5 T).
  • Image distortion and magnetic deflection were assessed.
  • The electric resistance of the hydrated dressing was compared to human tissues.

Main Results:

  • Temperature increases with the dressing were comparable to the phantom material alone at both field strengths.
  • No discernible image distortion or magnetic deflection was observed.
  • The dressing exhibited electric resistance similar to human body tissues.

Conclusions:

  • Aquacel Ag demonstrates favorable magnetic and electric properties, similar to human tissues.
  • The dressing meets ASTM standard F2503-05 for MR safety.
  • Aquacel Ag can be safely left on patients during MR imaging, facilitating uninterrupted wound care.

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