Importance

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Abstract

This suction needle device is used to transfer liquids such as cytotoxic drugs from a stoppered container to a syringe. This device has a sharpened needle which is conventionally attached to a hub. A thin-walled tubular sleeve is mounted on the shank of this needle and is disposed in a telescope fashion around this shank. One end of the sleeve is disposed a short distance from the sharpened end of the needle so that the stopper may be entered by the sharpened needle and sleeve and provides a seal when so penetrated. A crimping tool provides opposed and longitudinally displaced localized crimps to deform the sleeve to the extent that a positive engagement with the shank of the needle is made. The crimps are limited enough to provide positive securing of the sleeve without bending or distorting the interior capacity of the needle to draw fluids into the syringe. The thin-walled sleeve may have an aperture in the side and in flow communication with the air passage between the needle shank and sleeve. Other embodiments show this air passage in flow communication past the crimps to the atmosphere.

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First Claim