Sorry to hear about your father in law's problem. In his current state it is not possible to have a major operation (due to the infection and high jaundice
). Sometimes a stent
is responsible for the infection and that is why the doctor wants to change it to a metallic stent, which is more durable and can help in reducing the jaundice.
Once the jaundice subsides, a major surgery can be contemplated. In the meantime, please give him lot of fluids and sugar rich food.
Hope he gets well soon.