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Oxygen pressure as biosensor for rate adaptive cardiac pacing
J Carlsten1, N Holmström, P Hagel
1Swedish University of Agricultural Sciences, Uppsala.
Pacing and Clinical Electrophysiology : PACE
|November 1, 1994
Summary
A novel carbon-based oxygen sensor for cardiac pacing demonstrated physiological responses during rest and exercise in sheep. Long-term stability and correlation with heart rate suggest its promise for rate-adaptive pacing systems.
Area of Science:
- Biomedical Engineering
- Cardiovascular Research
- Medical Device Development
Background:
- Rate-adaptive cardiac pacing requires reliable physiological monitoring.
- Current methods for monitoring oxygen levels in blood for pacing applications have limitations.
Purpose of the Study:
- To develop and evaluate a new carbon-based oxygen sensor for rate-adaptive cardiac pacing.
- To assess the sensor's performance in measuring partial pressure of oxygen in mixed venous blood.
Main Methods:
- A novel carbon-based oxygen sensor was developed.
- The system was implanted in six sheep for long-term evaluation (mean follow-up: 261 days).
- Sensor performance was assessed during rest and exercise, and correlated with heart rate and oxygen saturation.
Main Results:
- The sensor exhibited physiological responses during both rest and exercise in the animal model.
- Long-term sensor stability and sensitivity were found to be satisfactory.
- Excellent correlation was observed between sensor readings, spontaneous heart rate variations, and oxygen saturation.
Conclusions:
- The developed carbon-based oxygen sensor shows significant promise for use in rate-adaptive cardiac pacing.
- Further development and validation are warranted given the positive initial results and limited experience.