| abstract |
The present invention provides an automatic injection device for subcutaneously injecting a substance into a user, comprising: a housing having an open first end and a second end; a syringe movably disposed in the housing The syringe includes a barrel portion for carrying the substance, a hollow needle in fluid communication with the barrel portion for injecting the substance from the syringe, and a stopper for sealing the barrel portion and for pressure selective Applying to the substance to force the substance through the hollow needle; a plunger for first moving the syringe toward the first end such that the needle protrudes from the first end and then applies pressure to the plug, the plunger including a rod Connected to the plug at the first end, a compressible extension center portion, and a flange between the second end of the rod and the compressible extension center portion; and a biasing mechanism for the plunger The biasing is toward a first open end of the outer casing, the biasing mechanism being disposed about a second end of the rod between the flange and the second end of the outer casing. The present invention also provides methods and kits for using an automatic injection device, and methods and kits for introducing an automatic injection device containing a drug based on the advantageous characteristics of the device compared to a pre-filled syringe. The present invention also provides methods and kits for training a recipient to use the automatic injection device. |