A Contact-Sensitive Probe for Biomedical Optics

Area of Science:

• Biomedical optics
• Sensor technology
• Wearable devices

Background:

• Capacitive proximity sensing is common, but not used in biomedical optics for probe contact monitoring.
• Quantitative measurement of probe contact is crucial for improving data quality and subject safety in optical monitoring.

Purpose of the Study:

• To develop a novel optical probe that integrates capacitive sensing for monitoring probe attachment to the skin.
• To enhance data quality and ensure subject safety during optical measurements.

Main Methods:

• A custom optical probe was designed using a flexible printed circuit board.
• The probe integrates a capacitive contact sensor, 3D-printed optic fiber holders, and an accelerometer sensor.

Main Results:

• The developed probe effectively monitors probe attachment and contact quality.
• The device can detect motion artifacts and probe detachment, ensuring optimal signal quality.

Conclusions:

• The novel optical probe with integrated capacitive sensing offers a reliable solution for continuous monitoring in biomedical optics.
• This technology significantly improves the quality and safety of optical measurements by ensuring proper probe contact.