| 摘要 |
<p>A device for performing a needleless hypodermic injection of a liquid medication contained in a medication unit within the device. The device comprises pyrotechnical means for generating within the device a predetermined pressure value necessary for injecting the medication. The device further comprises a housing adapted to withstand by itself the predetermined internal pressure value. The housing has a first chamber which contains a medication unit storing liquid medication to be injected and a second chamber which contains a propellant container, a predetermined amount of a propellant within said propellant container, and ignition means for igniting said propellant. The medication unit has a first region and a second region that are in liquid communication with each other. The first region is deformable and the second region has an ejection outlet. The first chamber of the housing comprises two zones, a first zone containing the medication unit and a second zone which is in communication with the second chamber, so that upon ignition of the propellant in the second chamber gas generated thereby expands into the second zone of the first chamber, exerts pressure on and deforms the deformable first region of the medication unit and thereby causes ejection of the liquid medication through the ejection outlet.</p> |
