Ask her for more time

You try to hide your intentions and gently ask them for more time with the excuse that this will impact a lot in your future.
She smiles and says that she will return in a moment.

The voice in your head speaks again "Don't use the vent in this room, they are also in the lab and you can't escape, you must run now or wait for the nurse, knock her down and run"

You feel the adrenaline in your body, you have to act!
If you just run, maybe the nurse can sound an alarm, but you don't have to fight.
If you knock her down, you will test your strength and you can fail, but is you succeed you can run without the risk of the alarms.