I'm not sure I understand what you are trying to find out.

A ventilator assists your breathing. It can do 100% of it for you, or it can do (I don't know the number) 10% of the breathing, and your body does the remaining 90%.

Again, I was a coma patient; I am not a medical; professional. A person who is sedated for something like a minor procedure (think a colonoscopy or an eye surgery) is awake and may be aware, or they may be simply put to sleep with drugs. Those folks can still breathe on their own and don't need a ventilator, because they are only partially sedated.

As you get more drugs for a deeper level of sedation, you breathing slows down.

A person who is put into a deeper level of sleep, like for a major surgery, may or may not get intubated with a ventilator. They may still be able to breathe on their own, but the drugs cause respiration to slow, and that can be dangerous, depending on what's happening. So they may go on a ventilator, if it is felt is needed.

A person who is medically induced is, I believe, usually intubated with a ventilator. They let the ventilator do the heavy lifting so the body can repair itself. Again, they heavy drugs slow respiration.

The ventilator does tit's work whether or not you are sedated. They sedate you because it's a scary friggin' experience to have a tube shoved down your throat, completely blocking it. It felt like a hard or corrugated plastic, and it was not pleasant. I began to freak a little, but they calmed me down enough to get their test done and then put me back under.

Those commercials that have been running in some areas of the US about not having a glass of wine with your Oxy? It's warning you because that combo is effectively sedating you to a level where your respiration can slow to a stop.

I do not remember anything about my coma, except a very weird thing when they put me back under. it's not the same as being asleep, IMO. I had no concept of the passage of time. I woke up five days later and thought it had been a couple of hours. I had a follow up surgery months later where I was just under general anesthesia for the surgery (knocked out) and it felt like I was out for 15 minutes. It had been 7 hours. I felt like Scott Lang in the Quantum World.