We are being tested in skills lab on indwelling catheter insertion. The instructor had us leave the syringe attached to the catheter after inflating & deflating the retention balloon to test its patency. However, our book states to detach the syringe once deflated & then to reattach after the catheter is inserted. One instructor said to do it the way we were taught & the other said to follow the book, so needless to say we are all very confused, especially since we practiced keeping the syringe attached. Is one way better than the other? Or does anybody have a preference? Thanks.