My interpretation is that the employees reused vials of meds as multi use/multi patient medications when they should have been single use medication vials and discarded after each patient. This would save money in the number of vials used, but would leave the actual vial at risk for contamination.
I believe I also read (or perhaps just interpreted) that employees may have, say, filled a large syringe for injection purposes in the mornings for the anticipated patient load that day, and then just changed needles between patients. This, too, would leave the syringes at risk for cross contamination, particularly if they were not careful to place a new needle on the syringe between patients.
These are poor ideas for saving time and money.
I further suspect that the employees who would do things like this were not actual nurses, but some kind of “medical technologists” or any of the permutations of “aid” “assistant”, “technician”, etc. that is so common in the medical field. It is commonly assumed that anyone wearing scrubs is some kind of nurse, which licensed and registered nurses find a constant source of irritation. The lady that takes your blood pressure at your Doctors office is quite likely not a nurse, but you have probably referred to her as such.
The “techs”, “aids”, “assistants”, etc., often have little training and are easily trained to do things “the company way” without having an understanding of why “the company way” may not be a good idea.
I know at my work, I often use only part of a vial of something and discard the remaining medication. One of the meds I commonly use has 4 doses in the vial. I have never used more than 3 doses on one patient, and sometimes use only one or two. I use a new needle and syringe for each dose. I would never, ever reuse the same needle (ouch, dull), or syringe, even on the same patient. And, I would never “save” this leftover medication for the next patient, even though the vial would still be ‘clean’. These are all single use items.
I could, however, see someone thinking “Gee, that’s a waste of 1, 2, or 3 doses of this stuff. How can I reduce waste?” Hopefully the person thinking this is a trained nurse or doctor who would consider the error and risk potential.