A brief overview of the procedures:
Temporary central venous catheter - Comes straight out of the neck or chest and is not usually left in for more than a week or two.
Peripherally Inserted Central Catheter (PICC) - Comes straight out of the upper arm near to the elbow and can often be left in for a few months.
Tunnelled central venous catheter - The catheter travels underneath the skin for a short distance and comes out on the chest wall. It can usually be left in for many months or even years.
Portacath - The catheter joins to a special injection port that is buried underneath the skin and it can usually be left in for many months or even years.