| 摘要 |
<p>An inner cannula 2, 2' for a tracheostomy tube assembly is formed from a tubular member 20, 20' having two parallel rows 21A and 21B, 21A' and 21B' of slots formed along its length and covered by a sheath 30, 30' of thin flexible material on the inside of the tubular member, so that the slots can freely open and close on flexing. The two rows of slots are separated from one another by two longitudinal regions 24 and 25, 24' and 25' uninterrupted by slots, which give the cannula axial rigidity. <IMAGE></p> |
