Optimizing Transcutaneous Oxygen Measurement Sites on Humans

Area of Science:

• Biomedical Engineering
• Optical Sensing Technologies
• Medical Devices

Background:

• Conventional transcutaneous oxygen monitors use electrochemical sensors, requiring heating and posing risks of skin irritation or burns.
• There is a need for safer, more comfortable, and wearable sensors for continuous remote respiratory monitoring.

Purpose of the Study:

• To evaluate a novel luminescence-based optical sensor for transcutaneous oxygen monitoring.
• To determine the optimal body location for wearable transcutaneous oxygen sensor placement.

Main Methods:

• Utilized a platinum porphyrin film-based optical sensor that measures luminescence quenching by oxygen.
• Assessed sensor performance across five body locations (thumb, wrist, forearm, thigh, shin) in four healthy volunteers.
• Measured partial pressure of transcutaneous oxygen via luminescence lifetime.

Main Results:

• The optical sensor provided accurate and reliable transcutaneous oxygen data across all tested locations.
• The thumb location exhibited the shortest settling times and most uniform luminescence lifetime values.
• The luminescence-based sensor uses dry electrodes, eliminating heating and reducing skin irritation risks.

Conclusions:

• Luminescence-based transcutaneous oxygen sensing is a viable and potentially revolutionary technology for at-home and remote monitoring.
• The thumb is identified as the optimal placement site for wearable optical transcutaneous oxygen sensors due to superior performance characteristics.
• This technology enhances patient safety and enables the development of miniature, wearable devices for continuous respiratory monitoring.