Would you recommend immediately exchanging a peritoneal dialysis catheter, or waiting until the completion of antibiotics with transition to HD, if a PD patient presents with peritonitis and a nonfunctional PD catheter?  

Optimally, peritonitis should be completely resolved before placing a new (and hence sterile) foreign body into the peritoneum. That said, all attempts to restore PD catheter function without invasive measures (non-surgical) should be attempted first. If the PD catheter can be restored with minimal...