If it does use one it is big enough to hold a loaded drip bag.
As it was described, you just lift the lid and toss the loaded drip big into the test chamber, Turn on the machine and there will magically appear the result. How much of what medicines, the salinity of the water in there with the meds, the name and address of the recipient patient, etc. ( I made that last part up,,,)
Even a novice like me can easily see that it is straight BOOLSHEET..