The parents of a baby girl who suffered permanent brain damage when she was accidentally administered laughing gas at a Sydney hospital say she is experiencing constant seizures and must be fed through a tube.

Baby Amelia Khan was inadvertently given nitrous oxide instead of oxygen shortly after she was born at Bankstown-Lidcombe Hospital in Sydney’s southwest on June 20.

Her parents, Benish and Danial Khan, said Amelia was a much anticipated first child and they were devastated the incident had left her with irreversible brain damage.

“We remain full of hope for Amelia’s future but we worry for her and want to do everything we can to make sure she has the best life she possibly can,” they said in a statement.

A month after Amelia was born, a second baby born at the same hospital was also given nitrous oxide and later died.

Mr and Mrs Khan have expressed their sympathy to the parents of the baby boy, who was named John Ghanem.

“We can only imagine the intense pain this family is going through and our hearts go out to them,” they said.

The law firm Maurice Blackburn is representing the Khan family in a potential claim for compensation from Bankstown-Lidcombe Hospital.

“We are in the very early stages of investigating that claim,” said medical negligence lawyer Libby Brookes.

The accident left Amelia with permanent brain damage. Photo: ABC

“We will work to get the best possible outcome for Amelia to ensure she gets what she needs so that she is given every chance to reach her potential.”

Mr and Mrs Khan said they wanted to prevent the same tragedy happening to other families.

“We just want everyone to know what happened to Amelia won’t ever go away. She will always have to live with the consequences of what was done to her at the hospital,” Mr and Mrs Khan said.

“But we will always be by her side and we’ll do everything we can to give her the best possible future.”

A report into the fatal mix-up by New South Wales Health found the incidents were the result of incorrect installation of gas pipelines, governance failures and flawed testing.

General manager of Bankstown Hospital Chris Leahy and an engineer involved in commissioning the gas line, have both been stood down.