abstract |
A device ( 100 ) for delivering a medicament into a patient's body by injection into or through the patient's skin, including a main body having a top enclosure ( 116 ) and a bottom enclosure ( 104 ), a reservoir ( 160 ) disposed within the main body for containing the medicament, and an injection needle ( 152 ) for penetrating the skin of the patient, the needle ( 152 ) having a lumen and selectively communicating with the reservoir ( 160 ). The device also includes a pressurizing system ( 600, 140 ) for selectively pressurizing the reservoir ( 160 ). In a pre-activated position, the pressurizing system ( 600, 140 ) contacts and compresses the reservoir ( 160 ) to reduce the initial volume of the reservoir ( 160 ), thereby allowing for partial filling of the reservoir ( 160 ). |