Thank you for responding, I can see how giving more information is crucial so here is more information about the patient : she has has had a mastectomy with a DIEP reconstructive flap. She has a Indwelling catheter in place and because of wording in the case study it appears to be unrelated to things like kinks in the tubing of the catheter etc as it states that the surgeons review may be required and with this case study it doesn't have information that suggests anything unless it should be done - if that makes sense? this first 24 hours is the first 24 hours of care when she returns to a ward - assumedly surgical. I can can see how elimination is priority if it were an issue but I haven't found anything that has talked about a Indwelling catheter in a patient that can only eliminate 30-50 ml/hr of urine and what this would mean for the patient.