| 摘要 |
<p>The positioning assembly comprises a base member 20 comprising a skin contact surface (22) and an opening 32 for the elongated shaft, a rotating assembly 26 configured to rotate relative to the base member about a rotation point located below the skin contact surface and a further opening 34, 36, 38. The assembly also comprises a locking mechanism 42, 44, 50, 52 for locking the position of the positioning assembly on the elongated shaft and for locking the orientation of the rotating assembly relative to the base member. The assembly is used with a surgical instrument which has an elongated shaft defining a longitudinal axis, for example a minimally invasive surgical instrument. In use, the elongated shaft of the surgical instrument will exert stress on the abdominal wall as the shaft is moved relative to abdominal wall. This stress is reduced if the rotation point is below the skin of the patent and the reduced stress allows easier movement of the surgical instrument.</p> |
