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Related Experiment Videos

Is polyurethane lead insulation still controversial?

J Mugica1, J C Daubert, B Lazarus

  • 1Département de Stimulation Cardiaque, Centre Chirurgical, Val d'Or, Saint-Cloud, France.

Pacing and Clinical Electrophysiology : PACE
|November 1, 1992
PubMed
Summary
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Polyurethane lead insulation shows high reliability, comparable to silastic electrodes, with nearly 100% success at 84 months. This study addresses past controversies regarding polyurethane electrode durability.

Area of Science:

  • Biomedical Engineering
  • Materials Science

Background:

  • A decade-long controversy questioned the reliability of polyurethane (PU) lead insulation.
  • Previous concerns focused on insulation degradation as a failure mode for cardiac pacing leads.

Purpose of the Study:

  • To compare the long-term reliability of polyurethane and silastic electrodes.
  • To assess insulation degradation in several thousand pacing leads using a large, established databank.

Main Methods:

  • Analysis of cumulative survival data from a large, long-standing worldwide databank.
  • Comparison of polyurethane, standard silastic, and high-performance silastic electrodes.
  • Evaluation based on the failure criterion of insulation degradation.

Main Results:

Related Experiment Videos

  • Polyurethane electrodes demonstrate 100% reliability at 84 months, similar to silastic electrodes.
  • The Medtronic 6972 electrode was a possible exception, but overall PU insulation reliability is high.
  • The findings address the historical controversy surrounding polyurethane lead insulation.

Conclusions:

  • Polyurethane lead insulation exhibits comparable long-term reliability to silastic alternatives.
  • The study provides strong evidence supporting the durability of polyurethane electrodes in cardiac pacing devices.