Continuous SpO2-Monitoring Headband Is Acceptable for Military Operations

Area of Science:

• Military Science
• Biomedical Engineering
• Wearable Technology

Background:

• Maintaining adequate blood oxygenation (SpO2) is critical for warfighter readiness during high-altitude operations and parachuting.
• A hands-free, real-time SpO2 monitoring wearable can enable preventive actions without task interference.

Purpose of the Study:

• To develop and assess the acceptability of a hands-free, forehead-based SpO2 wearable device for military applications.
• To evaluate the comfort, impact on activities, and overall acceptability of the prototype headband.

Main Methods:

• Prototype headbands with embedded photoplethysmography sensors for SpO2 and heart rate were constructed.
• Thirteen volunteers wore the headbands during rest, exercise, and two hours of free-living activities.
• Surveys assessed user feedback on fit, comfort, durability, and impact on daily tasks.

Main Results:

• Overall comfort was rated moderately comfortable (5.8/7), though slight discomfort emerged after two hours.
• The device had a minimal negative impact on daily activities (4.7/5).
• 69% of volunteers found the headband acceptable for wear durations of two hours or less.

Conclusions:

• The SpO2 headband, coupled with a USARIEM-patented algorithm, can provide risk guidance for acute mountain sickness (AMS) at high altitudes.
• Real-time SpO2 verification is crucial for high-altitude jumpers before exiting aircraft.
• The wearable is acceptable for short-term (≤2 hours) operations, potentially enhancing safety in high-altitude environments.