Patent ID: 8597241
Filing Date: 2013-12-03
Classification: A61M

Abstract:
1. A retained needle structure, comprising: a syringe needle comprising an inserting portion at a front end of a syringe body, an injection needle inserted on the inserting portion, and a fastening portion at one side of the syringe body; and a syringe cover comprising an aperture at a proximal end and a gliding portion extending at one side, wherein the gliding portion includes a sliding slot that forms a deviates slant portion at a distal end of the syringe cover, wherein the syringe cover has an oval cross section having a major axis and a minor axis, wherein the fastening portion of the syringe needle is configured to move along the sliding slot of the syringe cover, and wherein the width of the minor axis of the syringe cover coincides with a diameter of the syringe body and the width of major axis of the syringe cover is larger than an outer diameter of the syringe body such that a clearance exists between the syringe cover and the syringe body, thereby, when the fastening portion enters the deviates slant portion, and the injection needle is retracted inside the syringe cover, the syringe needle can be deflected to a position not aligned with a central axis of the syringe cover.