THE State Coroner will investigate the death of an elderly woman who died after being treated by a drug-stealing paramedic.
But Margaret Vipond's family and the State Opposition also want an investigation into the way Ambulance Victoria has handled its safety assessment of the hundreds of patients treated by rogue paramedics.
The 80-year-old died in hospital five weeks after a heart attack on Christmas Day, 2010, at her home near Yarrawonga.
Shortly after she died, Mrs Vipond's grandson, Nathan Vipond, was told by another paramedic who attended the scene that she had received saline instead of the powerful painkiller fentanyl.
The Yarrawonga paramedic involved escaped a criminal conviction and was dealt with through a diversion program.
Then late last year, two Melbourne paramedics were arrested by police after allegedly siphoning the highly addictive painkillers and refilling vials with tap water.
Ambulance Victoria has maintained that while these patients may have had compromised pain relief, they were not "harmed".
There have been seven ambulance officers accused of drug thefts in the past four years.
But Mr Vipond said his family believed patient outcomes could have been affected by the drug swipes and want a more thorough investigation.
"They wanted to sweep it under the carpet. I'm definitely not satisfied with Ambulance Victoria and their response," Mr Vipond said.
"That's the question we don't have an answer to. If she received the drug, would her body have been able to cope with the massive heart attack she had?
"That's why pain relief is issued, so the body can cope with the trauma and stabilise enough to get them to hospital."
Ambulance Victoria's Hume regional manager Gary Cook said after the fentanyl substitutions came to light, they contacted patients who could have been affected. They found most patients had also been given other pain relief.
Opposition parliamentary secretary for health Wade Noonan has also written to the Victorian Ombudsman calling for an investigation into Ambulance Victoria's handling of the drug theft and its impact on patients.
"There are some serious questions that remain unanswered," Mr Noonan said.
Read more on the Herald Sun.