ANYTHING at all that happens to also be wrong medically with the body affects the blood glucose, full stop. So, without diabetes we haven't a clue it happens because our healthy bodily parts and brain 'just deal with that' as part of their normal functioning. Fingerprick BG tests are done along with blood pressure, temperature and oximeter tests to every patient in every hospital bed, just the normal x times a day they routinely carry out their Observations rounds every single day you're there. Even though those doing the Obs aren't very senior medical personnel at all and don't know the next steps that need taking - they do know the range of 'what's OK' and 'what aren't' - so are supposed to tell whoever they report to, that a person's levels for any of those measurements are outside the 'OK' range and then up to that more senior person to take whatever action may be required. They do! I've had that happen with me, and also been with husband in a different hospital when it happened to him. Mine was a BG (and ketones) issue, after they'd operated on my smashed kneecap but otherwise fighting fit, charge nurse asked if I'd like to see a qualified DSN, yes please, advice heeded and pump parameters changed pdq, problem solved. Pete's was blood pressure cos his was 'too low' whereas I told them they'd obviously stressed him out since his BP numbers were both higher than 'normal' for him, since all his life he's had hypotension and even since aging it's got a bit higher, at the time 118/57 WAS high for him. Husband told them they'd have to keep him in there bed blocking until he died unless they let him go home and suggested they contacted the urology consultant who'd recently done his pancreatectomy what his usual BP had been when he saw them every time before and after the operation if they wouldn't believe us. So the Ward Sister did, and they agreed with us, it's unusually consistently low at his age - so I was allowed to bring him home.
He ain't diabetic and never has been despite his dad dying of pancreatic cancer and his mum being diagnosed Type 2 aged 70+ when she already had terminal bowel cancer. Bodies wear out.