Hi,
I have no medical training, but I do have a suggestion. Please take my “no medical training” seriously. Point of clarification, is it 13cm or 13mm? If it is 13mm (the outside diameter of the feeding tube), that equals .512 inches (barely over .5 inches). I may be ridiculed by the medical community, but here goes. For 35 cents, you can buy a .5 inch PVC connector at Home Depot. Here’s a link to the part.
http://www.homedepot.com/p/DURA-1-2-in-Schedule-40-PVC-Coupling-C429-005/100342935
Given that the feeding tube is flexible and just slightly larger than the .5 inch coupling, it should provide a tight seal. I would make sure that each end of the tubes (both the one coming out of the stomach and the extension) are cut as close to square as possible. This will minimize the PVC pipe touching the nutrition. Since PVC pipe is used in home plumbing and delivering drinking water, I’m not sure that matters, but why take a chance. Plus, you don’t want nutrition filling in the gap, getting stuck, and eventually generating unwanted bacteria in the tube. This then becomes one more part of the feeding apparatus to keep clean.
I had my tube replaced and understand it is a real PITA. The above might provide a temporary solution until a better one is found or the tube is replaced. Hope this helps. If you do head down this path, I’d be curious if it works.
Take care,
Art
P.S. If this .5 inch part doesn’t fit, look around the PVC coupling area and see if another part would work.
