| 摘要 |
PCT No. PCT/SE94/00353 Sec. 371 Date Oct. 13, 1995 Sec. 102(e) Date Oct. 13, 1995 PCT Filed Apr. 20, 1994 PCT Pub. No. WO94/23778 PCT Pub. Date Oct. 27, 1994A cannula includes a protective device mounted internally in a fixed position in the cannula chassis. The protective device includes internally a latching and locking system which functions to automatically apply the protective device to the front part, the point, of the cannula injection needle when the injection needle is retracted manually so as to separate it from the cannula chassis. When the protective device has been applied and locked firmly to the front part, the point, of the injection needle, the protective device is released from its fixed position and separated from the cannula chassis by application of an appropriate manual retroaxial pulling force. When the latching and locking process is activated, the cannula injection needle is deformed. Thus the cannula is for one-time use only, since the deformed injection needle cannot be reused. |
