A small number of people with type 1 diabetes may have a slightly different procedure, where only the cells that produce insulin (islet cells) are transplanted from a donor pancreas into the liver.
This is called islet transplantation and is usually carried out under local anaesthetic, which means you're awake but the area being operated on is numbed.
A thin, flexible tube (catheter) is inserted through your tummy and liver into the vein that supplies the liver with blood. The donor islet cells are then injected into it.
If the operation is successful, the donor cells will start making insulin. This can help people who experience severe episodes of a dangerously low blood sugar level that occur without warning.
Insulin treatment is often still needed after the operation, but the episodes of low blood sugar should be easier to control.
As with a conventional pancreas transplant, you'll need to take medicine to suppress your immune system for the rest of your life.
After the operation
Once the transplant is complete, you'll usually be moved to an intensive care unit (ICU) or a high dependency unit (HDU).
You'll be very closely looked after, and various tubes and machines that help monitor your health and support the functions of your body will be attached to you.