Skin testing and vaccinating needles and method of use thereof

Details Skin testing and vaccinating needles and method of use thereof Skin testing and vaccinating needles and method of use thereof

A - Human Necessities

61

M

A61M 37/00 (2006.01) A61B 10/00 (2006.01) A61B 17/20 (2006.01)

Patent

CA 2183733

This invention is a plastic skin testing and vaccinating needle (5) characterized by an end bifurcated into two sharp points (6) spaced sufficiently close so that in use the points (6) will penetrate and form a small hole in the skin when the needle (5) is simultaneously rotated and pressed against the skin. The spacing also causes liquid to adhere to and between the points (6) when the end is dipped in skin testing or vaccinating liquid. The cross section of the needle shaft in sufficiently large that the needle (5) 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 (5) is formed in a mold produced by electro-discharge machining so as to have an etched or matte surface which enhances the adherence of liquid to the bifurcated end.

Aiguille en plastique (5) pour tests et vaccins cutanés caractérisée par une extrémité en fourche dont les pointes tranchantes (6) sont suffisamment rapprochées pour former une petite perforation lorsqu'elle pénètre la peau sous l'effet conjugué d'une pression et d'une rotation. L'espace entre les pointes permet au liquide d'adhérer à ces dernières entre elles lorsqu'on trempe l'extrémité dans le liquide servant au test ou à la vaccination. La section de la tige de l'aiguille est suffisante pour permettre une rotation aisée de l'aiguille (5) entre le pouce et l'index, facilitée, par ailleurs, par la surface rugueuse ou irrégulière de la tige qui empêche le glissement. L'aiguille (5) est, de préférence, coulée dans un moule réalisé par électroérosion pour produire une surface découpée ou une matte renforçant l'adhérence du liquide sur l'extrémité fourchue.

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