Future Directions

Correction Factors:

Airflow testing with 500 mL syringe at atmospheric pressure would be performed to implement volumetric and CO2 correction factors.

The correction factor is meant to account for systematic inaccuracies resulting from airflow or sensing imperfections.

Accuracy Testing:

Perform volume testing using a 500 mL syringe in the hyperbaric chamber at several pressures.

The purpose is to determine whether the device can measure volume accurately at all pressures.

Data Collection:

Volume will be measured using a 500 mL syringe while decreasing the sampling frequency of the sensors to determine the minimum sampling frequency without compromising accuracy.

Less frequent data collection could improve battery life.

Humid Air Testing:

Until this point, all testing has been performed using dry air. In this test, a subject would breathe through the hyperbaric-capable spirometer connected in series to a Wright's Spirometer to determine whether the device can accurately measure the volume of humid breath.

Usability Test:

Ask technicians to use the device in a mock scenario.

Use technician feedback to make changes to the display or other features.