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Related Experiment Videos

In vitro bactericidal effect of a modified thermal Nitinol electrode.

E N Liatsikos1, C Z Dinlenc, R Kapoor

  • 1Department of Urology, Albert Einstein College of Medicine, Long Island Jewish Medical Center, New Hyde Park, New York 11042, USA.

Journal of Endourology
|May 8, 2001
PubMed
Summary

Electromagnetic energy from a surgical generator and Nitinol coil showed limited bactericidal effects on Escherichia coli (E. coli) in vitro. The effect was strongest in the center and decreased with distance, linked to temperature.

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Area of Science:

  • Biomedical Engineering
  • Microbiology
  • Materials Science

Background:

  • Nitinol stents are explored for medical applications.
  • Electromagnetic energy's potential as a sterilization method is under investigation.
  • Escherichia coli (E. coli) is a common bacterium relevant to various infections.

Purpose of the Study:

  • To evaluate the in vitro bactericidal effect of electromagnetic energy generated by a Nitinol coil and surgical generator on Escherichia coli.
  • To determine the relationship between applied voltage, temperature, and bacterial reduction.

Main Methods:

  • An in vitro model using non-nutritive agar inoculated with E. coli was developed.
  • A Nitinol coil connected to a surgical generator was placed in the agar.
  • Electrical energy was applied incrementally (5-25 V), with treatment stopping at 50°C core temperature.

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Main Results:

  • Significant E. coli reduction was observed at 15 V and 20 V across all tested zones.
  • At 25 V, significant bacterial reduction was confined to the core zone.
  • Treatment duration varied with voltage, decreasing as voltage increased.

Conclusions:

  • The bactericidal effect of the electromagnetic energy was localized to the central area and diminished towards the periphery.
  • The observed effect was correlated with the temperature achieved during the procedure.
  • These findings suggest limited utility of Nitinol stents for treating bacterial prostatitis via this method.