Hello! Thanks for putting your query in HCM. I am a Gastroenterologist (DM).
You haven't mentioned why nephrostomy
tube was placed. Any how if there was some infection due to obstruction in urinary tract
then after relieving the obstruction the sepsis
must have improved that may lead to improvement of AST/and ALT
I hope I have answered your query and this will help you. Remain in touch and get-well soon.