| 摘要 |
A short (60-70 mm) endonasal speculum for performing operations within and around the sellar region of the human head includes two side members each of which is composed of a handle and an elongated blade. The handles are attached to each other by a hinge and one of the handles includes a variable dilation control that is used to open the speculum. The elongated blades are arcuate in cross section and have distal ends that are opposed to each other in a trapezoidal configuration, either up or down, which permits greater visualization and access into the regions above and below the sella and greater instrument maneuverability within the speculum. |
