Patent ID: 6565541
Filing Date: 2003-05-20
Classification: A61M

Abstract:
Apparatus for releasably securing a cannula to an end portion of a syringe comprising:a cannula body having a hub and an elongated cannula portion projecting from said hub terminating in a cannula tip, said body being formed of a plastic material and having a passage therethrough for transmission of a fluid, said cannula hub having a surface for engaging the end portion of the syringe; and a cannula guard including a sleeve closed at one end and open at its opposite end for receiving said elongated cannula portion and a portion of said cannula hub within said sleeve; said cannula guard and said cannula having cooperable surfaces, respectively, configured to transmit a torque applied to said cannula guard in a first direction to said cannula to engage the cannula and syringe end portion thereby to secure the cannula and syringe to one another and to enable relative rotation of said cannula guard and said cannula without transmission of substantial torque from said cannula guard to said cannula when a torque is applied to said cannula guard in a second direction opposite said first direction.