You might not be old enough to remember the Apollo One accident. But I'm sure the hospital doesn't want to have you wind up a crispy critter like those three astronauts did. They were in a pure oxygen environment and I doubt you will be in that much concentration of oxygen, but still it is not worth the chance. I'm sure the hospitals insurance will not allow them to override their no electronic device rule no matter what evidence you present to them. Perhaps you can print out some material to read in an extra big font size. Not as good as a Kindle but you don't have many options under the circumstances.