There are not enough beds at Starship's intensive care unit and the national children's hospital is seeking donations for a $40 million expansion plan.
Starship's Paediatric ICU or PICU currently has 22 beds, catering to New Zealand's 1.25 million children under 16 who may need complex intensive care.
Occupancy levels are now critical every second day on average, with critical meaning fewer than two intensive care beds available, says Starship director of surgical and intensive care services Dr John Beca.
"We're under increasing pressure, we last expanded our bed numbers 12 years ago," he told a media conference.
"We are nearly full every two or three days, and we can manage that currently but we need to do something in the next 12 to 18 months."