This particular vent doesn't go any further, it just connects the break room to the closet upstairs. You vaguely remember seeing a vent somewhere else, though.
You ask about the green thing on the side table.
"Oh, that? I think it's a super soaker. Y'know, like a water gun. Somebody must've brought it for a prank or somethin'."
Go back up the vent and out into the closet room. Grab the screwdriver if we have not done so already. Listen for a moment at the door to see if we can hear anything outside then bolt out the door down to the patients room we woke up in. Open the vent with the screwdriver and then investigate the ventilator shaft.
get the super soaker, unscrew the vent if you need it won't go through the bars, and then fill it up with that flammable pesticide from earlier. if you can find a lighter or a box of kitchen matches you'll have something like a flamethrower to use. fleshy abominations tend to be rather flammable.
Nurse Uniform
Bloody Bandages
Scent of fresh Linens
Backpack
Backpack:
Syringe (Empty)
Towels (Bloody)
Clean Severed Hand
Screwdriver
Batteries
Duct tape
Basement Keycard
pack of Cigarettes