That's interesting. I'm certainly not questioning your judgment, but I would think that it would be the opposite, a 'no news is good news' type of thing. Everything we've heard to this point says that he's making slow but steady progress.
Does the length of time he's in an induced coma increase the risk of long-term damage to his organs?
Maybe yes maybe no.
What I do know is typically the longer one is on mechanical ventilation, the longer and more difficult it is to wean/ get them off.
Muscles get weak (atrophy) over time, the body in a sense becomes dependent on the power of the ventilator vs its own power/muscle.
In terms of damage to organs?
The ventilator does a very good job at ventilating (breathing) for the patient.
Tissue perfusion takes place when there is enough blood in the body to carry enough oxygen to the organs. As long as the heart remains a healthy pump for the blood, and the lungs in conjunction with the ventilator provide enough oxygen there shouldn’t be any organ damage.
Having said that there are other things that could lead to some organ damage, but again it’s very hard to speculate.
My prayer is that this won’t be the case but in fact there are people that lived or are living many years on a ventilator.
Being on a ventilator obviously isn’t a good thing but in itself isn’t going to cause end of life.
Edit:
Sorry I didn’t actually address the “induced coma”
If you’re talking specifically about the medications used for this, I can give you some vague information.
Depending on what they are using and how much it takes, the medications are fairly safe. I’ve seen some trauma/burn patients be sedated on a ventilator for much longer than we are taking about here (so far).
I don’t believe there is much risk of the medication causing any damage at this point, or any in the near future.