We discovered that while hannah is tossing and turning each night, if we have her in a sleep sac that zips from top to bottom, it keeps her feeding tube and her pulsox from tangeling. We have found that we like this brand (http://www.halosleep.com/) works best for us.
If we had one idea of advise, be sure it zips top to bottom, so the cords come out by thier feet.