Fisher and Paykel have designed this product to get as much money out of the NHS as possible, I tried to get a small part for a flowmeter that is only available from the US and cost less than £10.
Fisher and Paykel will state you have to buy the whole flowmeter at £200.
We warned our trust against it 7 years ago, but they were duped into thinking it would be a cost-saving, if one breaks down after a couple of years, the alternative is a new unit.