NEEDLE CANNULA AND METHOD FOR PRODUCING AND USING THE NEEDLE CANNULA Russian patent published in 2006 - IPC A61M5/32 A61B17/34 

FIELD: medical engineering.

SUBSTANCE: injection needle kit has needle cannula and bushing. The cannula has cavity taking the space from distal end, piercing skin, to opposite proximal end along the longitudinal axis of said needle cannula. The longitudinal cavity is cylindrical having essentially constant diameter all along the needle cannula. The cannula has the first elongated portion shaped as narrowing cone from outside at least on some length part to the distal end, piercing skin. The needle cannula has the second elongated portion of external diameter equal to or greater than the first elongated portion maximum diameter. The bushing has base and ring-shaped sleeve going from the base. The end sleeve has fastening member detachable from the bushing on syringe. The needle cannula is fixed on the base in a way that the first elongated portion projects from the base outward from the sleeve and the second elongated portion projects in the opposite direction. The sleeve envelops the second elongated portion at least partially.

EFFECT: reduced pain caused by injection; higher bending resistance.

8 cl, 7 dwg