| 摘要 |
Tracheostomy cannula with a small balloon or cuff (2) positioned posteriorly (or cranially) to the tube (1) which is consequently shorter. This tube (1) has a collar (5) enveloping its proximal third. The ''cuff'' (2) may or may not have separate compartments and its interior will communicate with the environmental air by means of conduits (6) that are flexible or not. As the component structures of the developed cannula progress very little caudally into the trachea, some complications, if not completely avoided, are better guarded against. Thus, there is less stimulus to coughing reflex; its cleaning and that of the trachea are simpler and, principally, a tracheo-innominate fistula will rarely occur. |
