<http://schema.org/howPerformed>
"a tube will be placed through your mouth into your windpipe (trachea) to help you breathe during the operation and for the first day or two following the operation. The tube is attached to a ventilator that will expand your lungs mechanically.  A nasogastric tube will be inserted through your nose into your stomach. The nasogastric tube will drain secretions from your stomach, and it will remain in place for a few days until your bowel function returns to normal.  A tube called a catheter will be placed in your bladder to drain urine. This will be removed a few days after the operation.  Three tubes will be placed in your abdomen to drain blood and fluid from around the liver. These will remain in place for about one week"^^<http://www.w3.org/2001/XMLSchema#string>
<http://my.clevelandclinic.org/health/treatments_and_procedures/hic_Liver_Transplantation>