Malignant biliary obstruction: Percutaneous transhepatic drainage and stenting

Your doctor and the staff caring for you will give instruction you as to when to fast the day before the procedure. If you are on certain medications which thin your blood e.g. Aspirin, Clopidogrel (Plavix), Warfarin, Low molecular weight heparin (Clexane), Rivaroxaban etc, you may be asked to stop these medications at the appropriate intervals before the procedure. In some situations, you may be asked to undergo additional tests, such as biopsy or brushing of the tumor before proceeding with stenting of the tumor.