She had seen the Sark doctor, who called for assistance from Guernsey, asking for the Flying Christine to collect her so she could be seen by doctors in Guernsey.
Just after 09:00 the vessel left Guernsey for Sark with a Paramedic and Emergency Care Assistant on board.
They were accompanied by a volunteer crew of a skipper and engineer who also responded to the incident.
Pictured: An ambulance was seen at St Peter Port Harbour around 10:00 waiting for the Flying Christine to return yesterday morning.
The Flying Christine was met at Maseline harbour by the Sark ambulance and the patient was then transferred to the care of the St John Emergency Ambulance Service staff.
She was assessed in Sark and monitored there before being transported to St Peter Port harbour. She was then taken by ambulance to the Emergency Department of the Princess Elizabeth Hospital for further examination and treatment.
In total the journey to Sark and back took the Flying Christine about an hour, with the boat docked back in Guernsey by about 10:20.
Pictured top: Inset image courtesy of St John Emergency Ambulance Service.