| 摘要 |
<p>A device suitable for insertion into a mammalian body comprises an elongated tube 22 or cannula, an elastic member 24 for bending the cannula, and a straightener 26 preventing the elastic member 24 from bending the cannula. The straightener 26 and elastic member 24 are capable of relative axial movement, so that the straightener 26 can be positioned to prevent or allow the elastic from bending the cannula. Preferably the elastic member 24 is formed from a superelastic shape-memory alloy. Other versions of the device without a straightener are desired. <IMAGE></p> |
