| 摘要 |
The device preset for the automatic intradermal administration of a drug consists of a pen-shaped body formed of a bottom part (1) and a top part (2) joined together by means of a screw or a bayonet or a similar joint; the pressure applied to a button (5) frees a piston (19), to which a force is imparted by means of a preloaded spring (13), which strikes and pushes the plunger (4) of a syringe (3) housed in the bottom part (1) of the device and loaded with the drug required by the patient, thus causing the syringe needle to come out of the tip and inject the drug. |
