Middle Boy has to wear the splint for a week.  He thinks it is inconvenient.  Hmmm...you are right, it is inconvenient.  A cast would be even less convenient.

The most convenient thing might have been to not roll yourself in your desk chair down the stairs.  That didn't cross your mind though, did it?

So...wear the splint for the week.  That is what they told you to do.  Follow their directions, because they have a medical degree and, well, you don't.

Prayers your arm heals quickly.