1. The cannula having a longitudinal axis and a tip with sharpened cannula that has a polished surface defining the first main face and two partial faces, both partial faces define respectively the second and third ground surfaces which intersect at an intersection line, wherein the line of intersection and the longitudinal axis cannula enclosed angle of 70-110 ° .2. Cannula according to Claim. 1, wherein the line of intersection and the longitudinal axis of the cannula enclosed angle of 75-105 ° .3. Cannula according to Claim. 1, wherein the line of intersection and the longitudinal axis of the cannula enclosed angle of 80-100 ° .4. Cannula according to Claim. 1, wherein the line of intersection and the longitudinal axis of the cannula enclosed angle of 85-95 ° .5. Cannula according to Claim. 1, wherein the second and third ground plane enclosed angle of 20-90 ° .6. Cannula according to Claim. 1, wherein the second and third ground plane enclosed angle of 25-75 ° .7. Cannula according to Claim. 1, wherein the second and third ground plane enclosed angle of 30-60 ° .8. Cannula according to Claim. 1, wherein the first grinded plane and the longitudinal axis of the cannula enclosed angle of 8-20 ° .9. Cannula according to Claim. 1, wherein the first grinded plane and the longitudinal axis of the cannula enclosed angle of 10-15 ° .10. Cannula according to Claim. 1, wherein the tip of the cannula curled inwardly toward the longitudinal axis kanyuli.11. Cannula according to claim. 10 wherein the distal end tip of the cannula is within the imaginary extension of the outer diameter of the non-bent kanyuli.12. Cannula according to claim. 10 wherein the distal end tip of the cannula is within the imaginary continuation of the inner diameter of the non-bent kanyuli.13. Cannula according to claim. 5, wherein the distal end tip of the cannula is located between the longitudinal axis of the cannula and the imaginary extension of the opposite inner stenki.14. The cannula1. Канюля
