| 摘要 |
PROBLEM TO BE SOLVED: To provide an instrument suitable for the purpose of injecting chemicals by a safe and efficient method. SOLUTION: A finger grip is formed with a tang positioned near the distal end of a syringe body when the finger grip is fully advanced in the distal direction. A needle cartridge is provided having a needle mounted in a needle holder, a sheath freely slidably mounted to the needle holder and a lock body for locking the sheath at a certain prescribed position over the distal end of the needle. When the cartridge is attached to the syringe body and aligned, the lock body can be reconfigured to release the sheath for movement relative to the needle. Specifically, the finger grip can be translated so as to engage the tang with the lock body, release the sheath and expose the distal end of the needle. |
