0i had a patient who receives tube feeding through a peg tube. he doesnt get any medicine through peg, just water flush and tube feeding. for the las few days, i"m having a lot of resistance when i tried to flush with water and when i aspirated back, there was a small amount of blood in the tube. what do you think is the cause of this? for the first few times, i couldnt flush with water, then finally i was able to flush. when i started his tube feeding, its infusing without problem.