In Australia, sleep specialists are concerned that companies selling costly sleep apnea devices are misdiagnosing Queenslanders and even putting lives at risk, reports The Courier-Mail.

The Federal Department of Health is looking into sleep testing practices following a rise in Medicare-funded home-based sleep studies on people who had never been seen by a specialist. In 2014/15 there were about 170,000 MBS claims for sleep studies, at a cost of $70 million.

The Medicare Benefits Schedule Review Taskforce found that 67 per cent of patients did not see a specialist 12 months before or after a sleep study.