Exactly - which seems that it WASN’T an accident. An accident would be the nurse or the patient in the shared area wanting to use the toilet.
The nurse donning gloves before she goes in may have meant she knew the fetus was there. (Told/asked to help by the other nurse? “A woman just had a misscarriage in her toilet in Room 313. Can you help me retrieve the baby? I’m going to get the container.”) The nurse looks in the toilet and thinks “Harumph - that’s no baby, that’s just some human tissue.” FLUSH.
Sorry - it said staff member, not nurse. I guess it might have been someone that checks/cleans the bathrooms every so often - but that would seem like an odd coincidence. And no bucket of cleaning supplies mentioned.
I imagine this is fairly rare, and that they may not have a procedure for closing off and protecting areas for such events. Although would seem to me that any number of things can happen in a hospital (especially bathrooms) where you would want it protected immediatly. Bodily fluids (vomit, blood, feces, etc.) that may have diesease, etc.