"Without a trained nurse, intensive care beds could not be used," she said
"There has been a large increase in the equipment needed to look after an ICU patient in New Zealand since we have been preparing for an outbreak of Covid, but not a similar increase in trained staff to care for these patients," she said.
Nurses Organisation spokesperson Kate Weston told Checkpoint the outbreak had hit a time when nurses were already under great pressure.
There were already big staff shortages.
Nurses had been working hard to do Covid testing and vaccinations in the past few months as well as dealing with winter illness outbreaks, she said.
"So it is putting a lot of pressure on the workforce who came in to this particular Delta outbreak with not much left in the tank," she said.
They would be used for non-Covid work to free up the existing nurses to concentrate on Covid patients, she said.
Covid-19 Response Minister Chris Hipkins told Checkpoint 30 more nurses were needed to help with managed isolation facilities.
Part of the DHBs' surge plans was to move staff around if needed and everyone was happy to chip in to help, he said.
"Everybody in the health system acknowledges that Auckland is doing some of the heavy lifting here and we need to support them to be successful if we want to avoid this becoming a potentially bigger outbreak that then ends up spreading around the rest of the country," he said.