Patent ID: 9604010
Date: 2017-03-28
CPC Classifications: A61M,F04C

Claim:
1. A needle assembly comprising a retractable needle and a needle seal, the needle assembly mountable to a barrel of a syringe comprising a plunger including a portion capable of engaging the retractable needle for retraction of the retractable needle, the retractable needle comprising: a cannula; a needle body having an elongate portion which houses at least part of the cannula, a plunger-engaging member, and at least one aperture located between the plunger-engaging member and the elongate portion, the at least one aperture extending transversely through the needle body relative to a longitudinal axis of the cannula, the at least one aperture being locatable in fluid communication with fluid contents of the syringe barrel; the cannula comprising a proximal end which is in fluid communication with, and extends into, the at least one aperture; the needle seal releasably mounted to the retractable needle so that the proximal end of the cannula is positioned distal to a proximal edge of the needle seal to thereby eliminate bubbles and minimize dead space.