Novo Nordisk A/S
Needle cannula, an injection needle assembly for an injection device and an injection device comprising such assembly

Abstract:

A needle cannula for an injection device, extends along a central axis and comprises: a) a skin piercing distal end (133b), b) a proximal end (133a) configured for penetrating a seal structure (102b) of a medicament container (102), and c) a sidewall extending between the skin piercing distal end (133b) and the proximal end (133a), wherein the proximal end (133a) is defined by an angled surface (134) pointing proximally, the angled surface (134) defining a leading portion (134.1) and a heel portion (134.2), and wherein the angled surface (134) comprises a surface portion (134a, 134b) at the heel portion (134.2) forming an angle (.alpha..sub.1) between 50 to 75 degrees with respect to the central axis, and further comprises a surface portion (134c) at the leading portion (134.1) forming an angle (.alpha..sub.2) between 60 to 85 degrees with respect to the central axis. An injection needle assembly for an injection device and an injection device comprising such assembly are further described.