Medical apparatus for use in gastrostomy procedures; medical instruments for use in gastrostomy procedures; gastrostomy feeding tube sets consisting of catheters, gastrostomy tubes and syringes; percutaneous endoscopic gastrostomy kits consisting of catheters, gastrostomy tubes, needles, syringes and dilators; apparatus for enteral feeding; tubes for enteral feeding; gastric feeding tubes; parts and fittings for the aforesaid goods