Injection apparatus and special needle for making an injection at a predetermined depth in the skin

摘要

An injection apparatus for making an injection at a predetermined depth in skin comprises: a skin positioning member, an injection needle (610), and means guiding the injection needle for movement from a parking position above the skin beside said skin positioning member to slide beneath said skin positioning member to an injection position; wherein: the tip (620) of the injection needle is closer to the longitudinal axis of the shaft portion (650) than is the outside of the shaft portion (650) and/or the length of the lumen opening (625) of the needle is in a range from 5 to 15 times the diameter of the shaft (650) of the needle. An injection needle wherein the length of the lumen opening (625) of the needle is in a range from 5 to 15 times the diameter of the shaft (650) of the needle.

主权项

1. An injection apparatus for making an injection at a predetermined depth in skin, comprising:
a skin positioning member for positioning a patch of skin within an area of skin to hold the patch of skin in a defined position; an injection needle comprising a tip, at least one bevel and a heel together forming a point at a distal end thereof, and a shaft portion immediately proximal of said heel having a longitudinal axis, including a lumen extending along the longitudinal axis, wherein the at least one bevel is formed between said tip and said heel such that a lumen opening is defined from the tip to a proximal end of the lumen opening located distal of the heel; and an injection needle movement guide proximate the injection needle to guide said injection needle for movement from a parking position above said skin positioning member to an injection position in which the distal end of the needle lies at a predetermined distance below said skin positioning member;wherein:
a length of the lumen opening of the needle from the tip of the needle to the proximal end of the lumen opening is in a range from 5 to 15 times an outer diameter of the shaft of the needle and the length of the lumen opening of the needle is measured parallel to the longitudinal axis of the needle; wherein at least a part of the point of the injection needle is formed substantially parallel to the longitudinal axis of the needle.