| 摘要 |
This patent describes a medicament injector for laryngotracheal anesthesia comprising a cylindrical vial having an open end and a closed end, a resilient plug inserted at least partially through said open end engaging the walls of said vail with a press fit, a cylindrical member having one closed end and a self-sustaining flexible curved and elongated cannula extending outwardly from said cylindrical member with a series of fluid discharge holes disposed radially thereabout over the portion of the path adjacent the free end, a thin, long fluid passage communicating with said cannula and extending inwardly into said cylindrical member with a sharpened inner end, cooperating threaded interlocking means on said cylindrical member and said plug, whereby upon interlocking the said plug with the said cylindrical member said vial is first held in an assembled but non-operating position and upon further interlocking of said plug with said cylindrical member said plug is pierced by said fluid passage and said passage communicates with said vial and said plug is locked securely to said cylindrical member to permit aspiration upon withdrawal of said vial, and to permit expulsion of the contents of said vial through said discharge holes in an essentially 360 DEG array upon exertion of pressure on said vial. |
