Former prime minister Ariel Sharon, who has been in a vegetative state since 2006, underwent a scheduled surgical procedure Tuesday at the Sheba Medical Center in Ramat Gan.

The operation reinstalled a feeding tube in Sharon’s digestive system. It proceeded without incident and the former prime minister was returned to the hospital’s Department of Respiratory Care and Rehabilitation, where he has been treated in recent years.

Sharon, 85, was prime minister from 2001 until suffering a second stroke that left him comatose in 2006. In 2005, he initiated and carried out the disengagement from the Gaza Strip, ordering the removal of all Israelis from the area.