Patent ID: 7435240
Filing Date: 2008-10-14
Classification: A61L,A61M

Abstract:
1. An injection needle for injection into body tissue, said injection needle having a pre-insertion state and an inserted state, being rigid in the pre-insertion state and flexible in the inserted state, having a channel for introduction of a fluid in the inserted state, the transition from rigid to flexible occurring after insertion into the body tissue, wherein the injection needle is made at least partly from at least one material which, in the pre-insertion state, has a flexural strength sufficient for the injection and, in the inserted state, has a reduced flexural strength, and the injection needle is rigid when a force acts on the injection needle in the longitudinal direction and is flexible when a force acts in the radial direction relative to the longitudinal axis of the injection needle; and wherein that the injection needle further comprises, in the pre-insertion state, at least one edge extending in the longitudinal direction on its circumference and, in the inserted state, an edgeless circumference.