A laser interferometer to measure fetal heart activity.

Area of Science:

• Biomedical Engineering
• Optics and Photonics
• Maternal-Fetal Medicine

Background:

• Fetal heart activity monitoring is crucial for prenatal care.
• Existing methods may have limitations in non-invasive detection.
• Vibrational sensing offers a novel approach to fetal monitoring.

Purpose of the Study:

• To present the function, specifications, and preliminary results of a novel laser microphone.
• To assess the feasibility of detecting fetal heart activity via maternal abdominal vibrations.
• To explore the potential for laser-based transducers in obstetric diagnostics.

Main Methods:

• Development of a laser microphone based on the Michaelson interferometer principle.
• Utilizing laser interferometry to detect subtle vibrations.
• Testing the device for sensitivity to fetal heart-induced abdominal movements.

Main Results:

• The laser microphone successfully detected vibrations associated with fetal heart activity.
• Preliminary results exceeded initial expectations, demonstrating high sensitivity.
• The study indicated the feasibility of using laser technology for this application.

Conclusions:

• The developed laser microphone is a viable tool for detecting fetal heart activity.
• The findings support the potential for laser diode-based systems in fetal monitoring.
• This technology opens avenues for non-invasive and advanced prenatal monitoring solutions.