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Temperature dependent pulse generator dysfunction.

A M Abrahamsen, T Aarsland

Pacing and Clinical Electrophysiology : PACE

|September 1, 1981

Summary

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A malfunctioning lithium-powered pulse generator failed due to temperature sensitivity. The R-wave inhibited unipolar device operated abnormally above 31.5°C, suggesting a timing crystal issue.

Area of Science:

Biomedical Engineering
Medical Device Technology

Background:

A lithium-powered, R-wave inhibited unipolar pulse generator (CPI Model 0505) was implanted.
The device malfunctioned 15 months post-implantation, requiring removal.

Observation:

The explanted pulse generator was tested in a water bath.
Abnormal function was observed at temperatures exceeding 31.5°C.
Normal function was restored below this temperature threshold.

Findings:

The malfunction was attributed to the 10 kHz timing crystal within the generator.
Temperature sensitivity of the timing crystal is the likely cause of device failure.

Implications:

This case highlights the critical role of temperature regulation in implantable electronic devices.

Related Experiment Videos

Understanding component-level temperature sensitivity is crucial for improving the reliability of cardiac rhythm management devices.