A security guard, two doctors and a nurse have been placed on special leave following an incident that saw 76-year-old Martha Marais being tied to a bench in the hospital.
Gauteng Health MEC Dr Bandile Masuku visited the family on Sunday and updated the media on his department's probe into the matter.
The four staffers have been given an opportunity to make representations as to why the should not be suspended, Masuku said.
Marais's family laid assault charges against the hospital after her daughter, Stephnie on Wednesday found her hungry and dehydrated mother lying under the bench, with her hands tied to it.
By Friday, the family had still not been told why she had been restrained.
Family spokesperson Viginia Keppler had said Marais was not a violent person and in the event that she had had a psychotic episode, she was so old and fragile that she could do no harm.
Keppler told reporters on Sunday that Marais was released from hospital on Saturday afternoon.
"She is still traumatised, she keeps on repeating herself about what happened to her and how she was tied up...
"In all fairness the family is happy with how far the investigation has developed so far. At least now we know there [were] doctors involved, a nurse and a security guard. It is more than what we have expected. So we are happy there is a process that's been understaken.
"We want people to go to jail, someone must take responsibility, there (are) people being identified. The MEC has indicated that as the investigations develops there might be more people being implicated..."
The SA Human Rights Commission also paid a visit to the family on Sunday for its own probe into Marais' treatment.
Buang Jones from the Human Rights Commission said: "The SAHRC has obatined instructions to secure appropriate redress for the victim and our instructions are to seek compensation and there are a number of other orders we are seeking. The commission is very amenable to facilitating a settlement between the family and the department of health."