Abstract: A manual subcutaneous jet injector includes an injector body having an injection portion provided with an injection system including an injection fluid volume fluidically connected to a subcutaneous injector outlet, and a pumping portion. The pumping portion includes an interior chamber having a pumping portion and a pressure chamber portion fluidically connected to the injection fluid volume. A manually operated injector pump is arranged in the pumping portion. At least one one-way valve is arranged between the pumping portion and the pressure chamber portion, the one-way valve including an inlet end and an outlet end. A piston is arranged in the pumping portion at the inlet end of the one-way valve.

Abstract: A method of manually charging a subcutaneous jet injector includes shifting a piston arranged within a pressure chamber portion of the subcutaneous jet injector, forcing a fluid through a one-way valve with the piston into a chamber of the subcutaneous jet injector, pressurizing the fluid in the chamber creating a pressurized fluid, forcing the pressurized fluid in the chamber into another chamber including a bolus dose of injectable fluid, and directing the bolus dose of injectable fluid from the subcutaneous jet injector with the pressurized fluid.

Abstract: A method of manually charging a subcutaneous jet injector includes shifting a piston arranged within a pressure chamber portion of the subcutaneous jet injector, forcing a fluid through a one-way valve with the piston into a chamber of the subcutaneous jet injector, pressurizing the fluid in the chamber creating a pressurized fluid, forcing the pressurized fluid in the chamber into another chamber including a bolus dose of injectable fluid, and directing the bolus dose of injectable fluid from the subcutaneous jet injector with the pressurized fluid.

Abstract: A manual subcutaneous jet injector includes an injector body having an injection portion provided with an injection system including an injection fluid volume fluidically connected to a subcutaneous injector outlet, and a pumping portion. The pumping portion includes an interior chamber having a pumping portion and a pressure chamber portion fluidically connected to the injection fluid volume. A manually operated injector pump is arranged in the pumping portion. At least one one-way valve is arranged between the pumping portion and the pressure chamber portion, the one-way valve including an inlet end and an outlet end. A piston is arranged in the pumping portion at the inlet end of the one-way valve.