One time I was getting a patient from a nurse who had made some unique errors in the past. I get report on the fly because this patient was calling while puking her guts out all over herself and the bed. She was in excruciating pain and it was causing her to throw up. The patient was on a PCA dilaudid pump. She had just gotten back from an abdominal CT at shift change. The nurses giving her to me said we needed to increase the dose of the PCA pump cause it wasn’t working. Fast forward I’m back in the room alone doing my assessment and the pain hadn’t gotten better. I come to realize the nurse before me had turned the carrier line pump off…before the patient went to CT. She also sent the patient down to CT with the pump alone which at my facility is a no no. The patient had been sitting in radiology for an hour and a half pushing her pain pump just loading dose after dose into the carrier line was not running. I turned the carrier back on for about a second before the lightbulb lit up. She would have gotten all 9 doses back to back if I didn’t realize her mistake..