Skin testing and vaccinating needles

摘要

A plastic skin testing and vaccinating needle characterized by an end bifurcated into two sharp points spaced sufficiently close so that the points will form a small hole in the skin when the needle is simultaneously rotated and pressed against the skin. The spacing also causes liquid to adhere to and between the points when the end is dipped in skin testing or vaccinating liquid. The cross-section of the needle shaft is sufficiently large that the needle can be readily rotated between a user's thumb and index finger. Rotation is facilitated by altering or roughening the surface of the shaft so as to reduce slippage during rotation. Preferably, the needle is formed in a die produced by electro-discharge machining so as to have an etched or matte surface which enhances the adherence of liquid to the bifurcated end.