A cannula and needle assembly, comprising: a cannula having a rearward end and a forward end; said cannula including a mount having rearward and forward ends with a passageway, having rearward and forward ends, extending therebetween; an adapter having rearward and forward ends; said forward end of said adapter configured to be secured to said rearward end of said mount; said rearward end of said adapter being configured to be removably connected to a syringe; an elongated hollow shaft having a rearward end and a forward end; said rearward end of said hollow shaft being secured to said forward end of said mount whereby said rearward end of said hollow shaft is in communication with said forward end of said passageway in said mount; a needle hub having a rearward end and a forward end; said needle hub having a passageway formed therein which extends between said rearward and forward ends of said needle hub; an elongated hollow needle having a rearward end and a forward end; said rearward end of said elongated hollow needle being secured to said forward end of said needle hub whereby said elongated hollow needle is in communication with said forward end of said passageway extending through said needle hub; said forward end of said elongated hollow needle being sharpened; a wing having upper and lower ends; said lower end of said wing being secured to said needle hub; characterised in that said needle hub being slidably mounted on said hollow shaft whereby said hollow shaft slidably extends through said rearward end of said needle hub, through said passageway in said needle hub and through said elongated hollow needle; said needle hub and said elongated hollow needle being slidably movable with respect to said hollow shaft and said mount between a first docked position and a second extended position; said forward end of said elongated hollow needle being positioned rearwardly of said forward end of said hollow shaft when said needle hub and said elongated hollow needle are in said first docked position; said forward end of said elongated hollow needle being positioned forwardly of said forward end of said cannula when said needle hub and said elongated hollow needle are in said extended position; and structure to yieldably maintain said needle hub and said elongated hollow needle in said docked position. a cannula having a rearward end and a forward end; said cannula including a mount having rearward and forward ends with a passageway, having rearward and forward ends, extending therebetween; an adapter having rearward and forward ends; said forward end of said adapter configured to be secured to said rearward end of said mount; said rearward end of said adapter being configured to be removably connected to a syringe; an elongated hollow shaft having a rearward end and a forward end; said rearward end of said hollow shaft being secured to said forward end of said mount whereby said rearward end of said hollow shaft is in communication with said forward end of said passageway in said mount; a needle hub having a rearward end and a forward end; said needle hub having a passageway formed therein which extends between said rearward and forward ends of said needle hub; an elongated hollow needle having a rearward end and a forward end; said rearward end of said elongated hollow needle being secured to said forward end of said needle hub whereby said elongated hollow needle is in communication with said forward end of said passageway extending through said needle hub; said forward end of said elongated hollow needle being sharpened; a wing having upper and lower ends; said lower end of said wing being secured to said needle hub; characterised in that said needle hub being slidably mounted on said hollow shaft whereby said hollow shaft slidably extends through said rearward end of said needle hub, through said passageway in said needle hub and through said elongated hollow needle; said needle hub and said elongated hollow needle being slidably movable with respect to said hollow shaft and said mount between a first docked position and a second extended position; said forward end of said elongated hollow needle being positioned rearwardly of said forward end of said hollow shaft when said needle hub and said elongated hollow needle are in said first docked position; said forward end of said elongated hollow needle being positioned forwardly of said forward end of said cannula when said needle hub and said elongated hollow needle are in said extended position; and structure to yieldably maintain said needle hub and said elongated hollow needle in said docked position.