Would you perform dialysis on a patient with altered mental status in the setting of an elevated blood urea nitrogen level attributed to a tube feeding diet?  

Uremia is symptomatic azotemia, I don't see how you don't dialyze that patient. The idea behind tube feeds is nutrition, that you need amino acids to make protein, but if the BUN is rising, clearly you are catabolizing some of them, and I would check with the dietician to make sure the patient isn't...