Car seat test

I have a question, do I have the right to refuse the carseat test before discharge? Let me explain. The carseat test is a minimum of 90 mins, at 66 mins my babys oxygen level dropped to 86% and so he "failed it". They made me wait another 24 hrs to redo it. And then the nurse said she thinks it was bc the oximeter wasnt reading correctly and they couldnt adjust it bc the other nurse had him dressed in a zipper outfit. Now I live 6 miles from the hospital and have someone who can ride in the back to monitor the baby. If for some reason it does it again, can I legally refuse this test and take my baby home? This is the ONLY thing keeping him in this hospital!