I think the University Hospital of Stavanger, "under my influence", is carrying out a type of procedure to clean the lungs of people, with or w/o solubles to help this procedure.
The logic is of course that NO one is dying from a 30 seconds water immersion of the lungs given they have rich possibilities for getting it out again/getting rid of it.
We'll see what comes of it... ;-)
Some use of sedatives may be called for during the procedure!
(More may be coming...)