Isaac and Rebecka May hope their son Isaiah can remain on a ventilator at the Stollery Chrildren's Hospital for another 90 days. (CBC) The parents of a three-month-old boy will be back in an Edmonton courtroom Wednesday to find out how much longer their son can remain on a ventilator.

Isaiah May is in the intensive care unit at the Stollery Children's Hospital with what doctors believe is severe brain damage. He was deprived of oxygen at birth after the umbilical cord wrapped around his neck.

Doctors were going to take the infant off his ventilator last week, but Isaiah's parents fought the decision in court. The judge ordered an independent assessment of the baby, but some medical experts believe that might be a difficult task.

There are few doctors qualified to conduct the assessment, said Dr. Michael Rieder, a professor of pediatrics at the University of Western Ontario, and those who are qualified know each other.

"That's a problem and of course, there's the whole issue of it's a controversial case so people who may have the expertise might not want to jump in," he said. "So I think it might be quite difficult to get a truly independent opinion."

It could also be difficult to find a specialist lawyers for the hospital and for the parents can agree on, he said.

"I respect the judge saying we need an independent council, but the family needs some closure on this one way or the other," said Reider. 'I think this is something that has to be parent time not legal time."

Isaiah May's parents hope their son will remain on the ventilator for another 90 days to see if there's some improvement. Lawyers for the hospital have suggested 30 days would be sufficient.