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Related Experiment Videos

Vaginal temperature sensing using UHF radio telemetry

Z McCreesh1, N E Evans, W G Scanlon

  • 1Northern Ireland Bioengineering Centre, UK.

Medical Engineering & Physics
|March 1, 1996
PubMed
Summary

This study introduces a new telemetric thermometer for basal body temperature tracking, reducing user errors common with conventional methods. Clinical results show enhanced performance for ovulation indication.

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Area of Science:

  • Biomedical Engineering
  • Reproductive Health Technology

Background:

  • Conventional basal body temperature (BBT) charting for ovulation prediction is prone to user-induced errors.
  • Accurate BBT monitoring is crucial for natural family planning and fertility awareness.

Purpose of the Study:

  • To propose and evaluate a novel two-part telemetric thermometer system for improved BBT monitoring.
  • To reduce errors associated with manual temperature recording and enhance ovulation indication accuracy.

Main Methods:

  • A low-power, SAWR-controlled UHF radio telemetry transmitter worn vaginally overnight.
  • Continuous data transmission to a receiver with a real-time clock for programmable sampling.
  • Temperature resolution of 0.1 degrees C and analysis of radio signal attenuation.

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Main Results:

  • The telemetric system demonstrated enhanced performance compared to traditional oral and axillary mercury-in-glass thermometers.
  • Body-worn transmitter measurements showed up to 30 dB attenuation, analyzed via polar plots.
  • Continuous, high-resolution temperature data was successfully collected and stored.

Conclusions:

  • The proposed telemetric thermometer offers a more reliable and accurate method for basal body temperature tracking.
  • This technology has the potential to improve fertility awareness and ovulation prediction for women.