What medical reasons that require feeding a patient through a nasogastric tube.?

Many things: no body use nasal gastric feeding tube now unless it have been used for a very short period of time if it was used they use it on any patient that not capable of eating but his guts is capable of digestion the food good way of nutrition for a patient that could not feed themselves IV fluid has no nutritional values only good for hydration if feeding needed they use now PEG tube