Abstract: Safety multiple sample rear adapter assemblies utilizing one or two molded components are provided. The two component devices have a male connector and a rear blood tube holder each of which is provided with locking devices. In assembly, the male connector is either lockingly forced into the rear blood tube holder, or lockingly screwed into the rear blood tube holder such that the male connector locks permanently into place inside the rear blood tube holder and cannot be removed. After use of the safety multiple sample rear adapter assembly, the assembly can be disposed of without danger of needlesticks, as the rear needle is shielded by the rear blood tube holder. In the single component device, the rear blood tube holder is provided with a male luer on one end, a receiving cylinder on the other end for receiving a standard blood collection vacuum tube, and a dividing wall which acts as the closed end of the receiving cylinder and which supports a nose which extends into the receiving cylinder.

Abstract: Improved shielded medical devices which minimize accidental needlesticks of the skin by an exposed contaminated needle are provided. The medical devices includes a hollow inner tube body having a pair of circumferential grooves on the outside thereof, and a slightly larger diameter hollow shield which is slidable relative to the inner tube. Lugs circumferentially spaced about the rearward end of the shield yieldingly engage the rearward grooves during use of the medical device and thereby permit normal use of an exposed needle. Thereafter the shield may be moved along the axis of the inner tube to a second position wherein the shield covers the now-contaminated needle. A plurality of axial slits in the rearward end of the shield in conjunction with a shoulder on the inner tube body forwardly adjacent a forward circumferential groove permit the medical devices to be assembled.

Abstract: Improved shielded medical devices which minimize accidental needlesticks of the skin by an exposed contaminated needle are provided. The medical devices include a hollow inner tube body having at least two circumferential grooves on the outside thereof, and a slightly larger diameter hollow shield which is slidable relative to the inner tube. A first circumferential protrusion which is located at the rearward end of the shield yieldingly engages the rearward groove during use of the medical device and thereby permits normal use of an exposed needle. Thereafter the shield may be moved along the longitudinal axis of the inner tube to a second position where the shield covers the now-contaminated needle. In the shielded second position a second circumferential protrusion which is located in forward proximity to the first protrusion engages the forward groove of the inner tube.