Move right, into the room, and keep going until you hear someone pleading for their life (seemingly); there are more ops here standing by the pillars, one of these is carrying a huge gas-canister. You can use the explosive tanks around here to take your enemies out faster. Bear in mind that the Ops on this level are carrying grenades so if you shoot make sure it's quick; they will throw frags at you and you'll be pancaked. If you notice the grenade in time just run for cover behind a wall or move further back. Ultimately, you won't be able to save the doctor anyway, as you will have seen before, so move to the small room on the right.
Head through the grating and straight ahead; you’ll come up to some sliding doors which you’ll go through. Find a door with a flight of stairs and you’ll head down into a badly lit area, where another of the ‘abominations’ will attack you so get ready. These guys are just quick as mentioned, so use a powerful weapon once you have a shot and they'll be easily killed.
Keep following the way ahead: you'll come to a small corner with a flight of stairs on your right. There is a medi-kit nearby at the end of the room, so grab that if you need it. Go up the stairs and the whole place will begin shaking: it looks like you need to run as the hospital will explode at any moment. Move forward and you'll eventually come to a freight elevator; activate the panel and you can finally get out of here, before the place explodes, and move onto another level of the Armacham facility.