Gastric balloons linked to five deaths

US federal authorities are investigating at least five patient deaths linked to obesity surgery.

The Food and Drug Administration (FDA) has issued a safety alert this week on the potential risk of liquid-filled intragastric balloon systems.

All deaths happened last year, within a month of the 30-minute procedure.

Four of the cases involved Apollo Endo Surgery's Orbera Intragastric Balloon System while one involved ReShape MedicalReShape Integrated Dual Balloon System.

It's still unclear whether there is a definitive link between the