NEEDLE ASSEMBLY, INTRADERMAL INJECTION DEVICE PROVIDED WITH THE SAME AND METHOD FOR INTRADERMAL INJECTION

摘要

PROBLEM TO BE SOLVED: To provide a drug delivery device suited for intradermally injecting substances such as a drug or vaccine. SOLUTION: A drug delivery device provided with a needle assembly facilitates intradermal injection using a various types of drug containers such as an injectors or the like. In the needle assembly, a hub supports a needle, and a limitter surrounds the needle. This limitter has a skin contacting surface which is constituted so as to be pressed on the skin of a subject to be intradermally injected. The tip of the needle is protruded by a selected distance exceeding the skin contacting surface to limit a depth of the subject's skin penetrated by the needle.