Here is a little video that we have recorded, of the Medela Supplemental Nutrition System (Lacta-Aide) actually being used. (Feeding Tube in action) There is quite a fine art in positioning the tube just in the right spot in baby’s mouth, so that the suction bring the milks down the tube. It needs to be right in the hard baby of the roof of the mouth.
The mum that helped us record this video, says it does take a lot of patience to get it work correctly. But she says she can feel when the tube (with supplemental formula) is working, as she can feel the slightly cooler temperature of the milk on her nipple as it comes out of the tube.