| 摘要 |
A needle device has a needle assembly including a hub having one end fitted with a blunt cannula. The blunt cannula has a base section, a central section and a shaft having a distal apertured end. The needle of the needle assembly extends through an internal passage of the blunt cannula and is sealingly fitted to a portion of the internal passage. The hub of the needle assembly has another end connectable to a syringe. When the device is connected to a syringe, a fluid communication path is established between the apertured end of the shaft and the interior of the syringe via the lumen of the needle. The shaft of the blunt cannula is usable to pierce the seal of a fluid store while maintaining the needle in an unused state for subsequent patient use. The distal end of the shaft may be protected by an end cap. |
