Conversation: The conversation between human and AI assistant.
[|Human|] My friend had Pyeloplasty Surgery on 12/11/13.  Each time they remove the catheter, he spikes a fever and ends up back in the hospital and they replace the catheter.  Today, they removed the catheter and stent that was put in place during the surgery.  This evening, he has spiked another fever.  What could be going on?
[|AI|]  Hi, Welcome to Chat Doctor. Catheters after surgery are supposed to be changed regularly as these patients are predisposed to catheter associated infections by gram negative bacteria. Pyeloplasty surgery has common complications of repeated infections due to the indwelling stent. I suggest you get a urine culture sensitivity done and get appropriate antibiotic cover. Chances of repeated obstructions are possible as manipulative procedures are indicated in this patient. Thanks.