The invention relates to a fuel supply system for injecting liquefied vapor under high pressure, such as liquid petroleum gas, into a combustion chamber of an internal combustion engine. The securing plate has at least three resilient members secured on a bottom surface thereof. A plurality of securing members selectively secures a second plate of the pair of plates to the first plate such that the upper surface of the second plate is adjacent to the lower surface of the first plate. The prosthetic graft has a long-term patency and success rate that is superior to other previously described prosthetic grafts designed for such use. The determination may be based on a caller providing a threshold volume of voice input within a threshold area of proximity near the calling system.