| 摘要 |
An obturator especially for use as a part of a tracheal tube assembly permits the tracheal tube to have a squared off, unbeveled, distal end with an annular, circular rim of predetermined diameter which easily passes through the vocal cords. The obturator has a soft, flexible tip of generally conical configuration with a blunt, rounded apex and a truncated conical flexible trailing skirt with an outer diameter greater than the outer diameter of the tube rim to shield it during insertion and permit smooth tube entry. The skirt folds, or inverts, toward the apex to enable withdrawal of the obturator through the bore of the tube. The distal end of the metallic rod of the obturator is swaged and pierced and the soft tip is molded thereon to assure against dislodgement. |
