Conduct medical screening.

Ensure participant safety throughout the study.

Inserting/removing radial arterial line.

Operating the hypoxicator equipment.

Taking ABG samples from arterial line.

Ensure correct positioning of all involved devices.

Ensure data is being recorded from all monitors.

Time-stamping of study activities and ABGs.

Troubleshoot any device-related issues throughout.

Collect and process the ABG.

Identify ABG report with correct activity (eg, tapping, tablet, 95%).

Discard the blood sample.

Explain activities to participants.

Giving instructions and guide participants through movement phase activities.

Respiratory rate manual count at ABG time points.

FiO₂ manual record at ABG time points in the hypoxia phase.

Manually record the time ABGs are drawn.

Complement/assist any required activities.

Responsible for oversight and detection of any suboptimal activities/conditions.

Monitors procedures and real time data quality.

Double checks devices.

Ensures reliable data acquisition throughout.