Asterile urine specimen for culture and sensitivity has been ordered for a client who has an indwelling urinary catheter. how should the nurse obtain this specimen? collect a urine specimen from the collection bag first thing in the morning, or a few hours after the client receives a diuretic. empty the collection bag, wait 30 minutes, and then collect the contents of the collection bag. discontinue the indwelling catheter and insert an intermittent catheter to obtain the sterile specimen. withdraw several milliliters of urine from the port on the collection tubing, using a syringe and needle.