A teenage girl swimming in Narrabeen Lakes, Northern Beaches, has sustained significant head injuries when she fell into the water and was struck by the propeller of a boat.

The girl also sustained suspected spinal injuries.

The Mounties Care CareFlight Helicopter was tasked shortly before 1:30pm and landed in Melwood Oval where NSW Ambulance paramedics, who had provided initial treatment for the girl, had transported her to meet CareFlight’s medical team.

CareFlight’s specialist doctor and NSW Ambulance critical care paramedic conducted a clinical assessment on the patient, including an ultrasound. They administered pain relief and intubated the teenager and placed her in an induced coma to stabilise her condition.

CareFlight’s medical team provided ongoing treatment for the girl as she was airlifted in a critical condition to The Children’s Hospital at Westmead.