I have been informed that standards NZ will not be supplying this standard.
It must be purchased directly from Standards Australia. Please use the following link
When you enter the site you need to type in AS5369 in search panel. To purchase you will need to create an account.
Webreader version = $268.88 AUD
Hard copy = $298.46 AUD (plus postage)
If your hospital has a librarian I suggest that you ask them to organise for you