het lijkt alsof 'central venous access device' een wat algemenere term is dan 'central venous catheter' maar als je de hieronder gegeven beschrijving ervan leest dan lijken er geen grote verschillen te zijn
volgens deze koppeling worden ze ook in dezelfde venen ingebracht
http://en.wikipedia.org/wiki/Central_venous_catheter
Central venous access devices are small, flexible tubes placed in large veins for people who require frequent access to the bloodstream.
•Central venous access devices are often referred to as venous access ports or catheters, because they allow frequent access to the veins without deep needle sticks.
•Placement is usually in one of the large veins of the chest or neck, although placement can also be in the groin, if necessary.
•Venous access devices typically remain in place for long periods: weeks, months, or even longer.
http://www.emedicinehealth.com/venous_access_devices/article...