Coronavirus has sparked a new conversation about the difference between ventilators, CPAP and BiPAP machines.

Read more: CPAP vs BiPAP Machine Final Thoughts Millions of people with sleep apena have used different machines to treat their sleeping problem.

But Onufrak says using these machines to treat COVID-19 patients is a last resort. While ventilators are closed-circuit systems, CPAP and BiPAP devices are not.