Dr Chris Clough, former chair of the National Clinical Advisory Team who oversaw the final report into the brain surgery failings, said he did not believe the trust was learning lessons.
“I am begging them to get this report out and be open and fair with patients,” he said.
“There’s suffering that has gone on here and they need to let people know what went on.”
DBS is a surgical treatment for people with severe movement disorders like Parkinson’s disease and dystonia.
Electrical pulses can significantly reduce a patient’s uncontrollable shaking and improve their quality of life.