16:33 Mar 7, 2011 

How far down the oesophagus is the stent being positioned? Is it being stitched into position?

08:22 Mar 7, 2011 

Perhaps the patient has had surgery in this area on a previous occasion? This is perhaps why there is a narrowing.

I would also translate operatienaad with suture line.

01:13 Mar 7, 2011 

perhaps they mean with 'naad' the narrow channel running through the stricture

it says: 'oprekken van de vernauwing door de operatienaad'

you could paraphrase this as 'oprekken van de vernauwing door the narrow channel (naad) where the procedure (operatie) needs to be carried out

probably they need to pass a balloon through (door) 'this channel'

I can imagine that this stricture looks like a 'naad' if you at it from above

this interpretation would explain the absence of invasive surgery

but I must admit it would be peculiar use of language