| abstract |
A multiple dose, single barrel syringe has a barrel comprising a plurality of telescoping sections of progressively decreasing diameter. A puncturable fluid tight membrane extending across the forward end of each barrel section except the first divides the interior of the barrel into a plurality of separate fluid receiving chambers, each of which may contain a different fluid medication. A plunger is slidably mounted in the last barrel section and extends exteriorly therefrom. At the forward end of the syringe is a hollow needle, which extends through a needle-receiving tubular conduit at the forward end of the first barrel section so that the needle is disposed partly inside and partly outside the barrel. Both ends of the needle are sharply pointed. The inner end of the needle punctures the membranes so that, as each chamber in the barrel is emptied, the next chamber is placed in communication with the needle. |