My Husband Just Had A Stint Put In And Kidney

my husband just had a stint put in and kidney stones blasted and the stint will stay in for two weeks. He was on medicine for high potassium but took himself off 3 weeks ago due to constipation ,since the last few weeks he has been getting very sick to his stomach , throwing up and has now lost his appetite and is only having clear broth which he brought up. All he is doing is sleeping and peeing