| 摘要 |
The cross-section of an endoscope (arthroscope) for inspection of or operation on bone joints is approximately rectangular and of a width along the inner axis 20 sufficient to accommodate the largest of the three components which comprise an objective lens 11, an irrigation conduit 12 and an instrument channel 13. These components are enclosed by a steel sheath 14 and the spaces are filled with optical fibres 15 for illumination. Opposite faces of the sheath are preferably curved in the same sense to a radius of between 2 and 3 cm to fit more readily into the gaps between bones in the principal joints, such as the knee, shoulder, and hip joints. <IMAGE> |
