The developer of the world's smallest brain implant, Kitea Health, says it not only alerts parents when pressure is building in their child's brain, but will take the pressure off families living in constant fear of a serious medical event. Clinical trials have started in 20 people with hydrocephalus in Auckland. Kitea Health CEO Dr Simon Malpas tells Bryan Crump typically hydrocephalus is treated by inserting a shunt in the brain - which can block.