| 摘要 |
There is disclosed a medical tube or tracheostomy assembly wherein a one-piece, flexible, plastic obturator 2 is provided with resilient catches 31 at its machine end that engage with lips 14 on the machine end of a tracheostomy tube 1 such that the obturator cannot be rearwardly displaced. The obturator which extends through and beyond the patient end of the tube is of strap-like, rectangular section and provided with a bullet head nose 23 at its patient end. An air passage allowing the patient to breath through the assembly is defined by a bore 25 between the nose tip and its rear, the gap between the rectangular strap 20 and the provision of holes 34 in the flange 29 provided at the machine end of the obturator. The obturator is disengaged by twisting the flange so that the catches come out of alignment with the lips and pulling back. |
