Table 3.

Research team roles

Professional	Role in study	Description of responsibilities
Senior anaesthetist	Medical cover	Conduct medical screening. Ensure participant safety throughout the study. Inserting/removing radial arterial line. Operating the hypoxicator equipment. Taking ABG samples from arterial line.
Researcher 1	Devices and time-stamping	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.
Researcher 2	ABG processing	Collect and process the ABG. Identify ABG report with correct activity (eg, tapping, tablet, 95%). Discard the blood sample.
Researcher 3	Participant activities and instructions	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.
Researcher 4	Support/backup	Manually record the time ABGs are drawn. Complement/assist any required activities. Responsible for oversight and detection of any suboptimal activities/conditions.
Engineer	Data monitoring	Monitors procedures and real time data quality. Double checks devices. Ensures reliable data acquisition throughout.

ABG, arterial blood gas; FiO₂, fraction of inspired oxygen.