Was on fluids vs Had to take fluids

Some examples from the web:

• Last time it happened it was fluid on the lung.
• We have her on fluids right now, but her liver and kidneys look fine.
• Probably keep him on fluids for a few more hours, then off he goes.
• Well, the-the study of combustion is based largely on fluid mechanics.
• Let's keep him on fluids and cefuroxime to be safe.
• Subject: Rules on fluids on board aircraft and improving screening equipment
• Research into such explosives and the development of such equipment could render superfluous the strict rules on fluids in hand luggage which have just been agreed, which would be more convenient for many travellers.
• You've checked her airway and started fluid resuscitation with D-5 N.S. fluids.
• Fluid retention: dasatinib is associated with fluid retention.
• The fluid is derived from werewolf toxin.
• Apparently evil is an embalming fluid.
• Your mother had a spinal-fluid leak.
• Then I removed excess amniotic fluid.
• Only to Wesen through fluid exchange.
• Now fluid's collecting in his chest.
• Me and Belly collecting human tissue and fluid specimens.
• Mulder needs warm clothes and fluids.
• During cutting and handling, avoid excessive fluid loss from InductOs.
• During handling, avoid excessive fluid loss from InductOs.
• Adequate body temperature and fluid intake should be maintained.

Some examples from the web:

• patient is permitted to take fluids and medicinal products by mouth.
• is permitted to take fluids and medicinal products by mouth.
• We are going to take some fluid samples from your ear and your lung.
• I forgot to take my Hub fluid.
• They give us their used oil, we got to take their transmission fluid and Freon in the bargain.
• Now, we want to see if there are any of these toxins in Liam's brain, and in order to do that, we need to take a little fluid from his spine.
• You will take some fluid from my eye.
• YOU'VE GOT TO TAKE THE FLUID INTO YOUR LUNGS.
• The drain takes the fluid out of your body So it won't go where it's not supposed to.
• You let me take too much spinal fluid.
• If you get more Flebogammadif than you should, your body may take on too much fluid.
• Every breath you take, every fluid you make is meticulously recorded and analyzed... mourned.
• - If you are elderly with existing kidney problems take care that your fluid intake is sufficient
• So, take in lots of fluids and get lots of extra rest.
• Look, all the doctor is going to say is that we need to get some rest drink plenty of fluids, take some aspirin.
• One for extracting oxygen out of the deep-sea water, another one which houses this chemosynthetic bacteria, which takes the hydrothermal fluid - that hot water that you saw coming out of the bottom - and converts that into simple sugars that the tube worm can digest.
• I had to take care of my brothers and sisters.
• I had to take away her car keys for a month.
• I had to take my mother'shairstylist.
• She had to take the car in.