Volunteer bikers deliver life-saving probes to Covid-19 patients

The video tutorial explains how to use a device to monitor oxygen levels, emphasizing its importance for COVID patients. It introduces a 24-hour loan probe service that delivers probes within 90 minutes, allowing doctors to remotely monitor patients who cannot visit a clinic.

What is the general principle behind the devices mentioned in the text?

Why is it important to monitor oxygen levels in COVID or suspected COVID patients?

What role does the probe service play in patient care?

How quickly can a probe be delivered to a patient in London?

What challenges might a patient face when trying to get to a doctor's surgery?