My question, sheikh, is that I underwent a surgery before Ramadan and now I wear a splint on my leg. How can I remove janabah (major ritual impurity) to read the Quran and perform other acts of worship, particularly in Ramadan?

You have to wash yourself up and wipe over the splint with water. You do not have to wash it but only wash the other parts. This wiping over the splint is sufficient for you according to the hadith.