All procedures and connections must be aseptic, to minimise infection risk from bacteria entering the bloodstream.
Carter is attached to his Parenteral Nutrition via two machines for 12 hours every night at home, with the support of a team of medical professionals.
"This system goes straight to his duodenum because his stomach and bowel don't function properly - it's gentler and has given him relief," said Ms Kingston.
It has also given Carter more energy and enabled him to continue attending Waipawa School four mornings a week.
"He loves going to school, and he's also able to enjoy more time with his twin sister Gabby and little sister Holly," Ms Kingston said.
Carter is one of 215 patients - about 12 are children - in Australia and New Zealand living with Intestinal Failure (IF) and being kept alive by Parenteral Nutrition.
From August 2 to 8 is HPN Awareness Week, aimed at making people more aware of this condition which leaves patients often feeling isolated and unsure of where to turn for emotional support.
Ms Kingston and Mr Drake were keen to tell their story to help inform people and also let them know about Parenteral Nutrition Down Under (PNDU) - a patient-run support group for those who have HPN and their carers.
"We have fantastic support and help on our journey to help Carter live as pain-free and enjoyable a life as possible while searching for answers and possible cures from our Hawke's Bay Hospital and Starship teams."
-Anyone keen to learn more about the support group can email contactpndu@gmail.com or head online to the website www.pndu.org