A nurse is caring for a patient with an indwelling urinary catheter. A urine specimen for culture and sensitivity is ordered. What should the nurse do when collecting this specimen?

When collecting a urine specimen for culture and sensitivity from a patient with an indwelling urinary catheter, the nurse must obtain the specimen from the catheter's sampling port using a sterile syringe and then transfer it into a sterile urine container. The sterile container preserves specimen integrity and prevents contamination, ensuring accurate culture results. Obtaining urine directly from the collection bag is incorrect because urine in the bag may have been sitting for hours, allowing bacterial overgrowth and altering culture results — the bag is not a sterile environment. Asking the patient to provide a midstream clean-catch sample is inappropriate because the patient has an indwelling catheter and is not voiding normally. Disconnecting the catheter from the drainage tubing to collect urine directly would break the closed drainage system, introducing bacteria and greatly increasing the risk of a catheter-associated urinary tract infection. The correct technique is to clamp the tubing briefly, allow urine to collect in the tube proximal to the clamp, then aspirate from the needleless sampling port and transfer the specimen into a sterile container — this maintains the closed system and provides an uncontaminated, representative sample.