hospitals can be so annoying for that... I know a diet-controlled diabetic who was in A&E recently with/for their partner and approaching time to eat something. They decided to attract the attention of a member of medical staff and explain that they were a diet-controlled diabetic and needed to eat something, and was this a good time to nip to the cafeteria? Staff members ignored the bit about "diabetic" and just kept saying to wait a while, the (particular doctor) would be round shortly and their partner would likely get moved to a ward, so it would be best not to go anywhere. The doctor in question didn't make an appearance till the next morning, it's a good thing my friend ignored the advice and ducked out to the canteen anyway when he started to feel ill.