All India Institute Of Medical Science [AIIMS] — too long waiting time

Address:

Jodhpur, Rajasthan

We are here for angiography. They told that not to eat and drink anything after 12 in night. They move towards radiology dept 10o clock in morning. But still 2.30 oclock in noon we are waiting for our turn. We can understand that there may be another patient. But my father is sugar patient so he can't wait without eat and drink water for this long time.
There should be a proper time management so that no one wait for this long time without having food.
If he have more problems while waiting then what can we do... Kindly take strict and immediate action.