| 摘要 |
A surgical instrument support assembly (10) includes a rail-mounted clamp (18) and a universal positioning arm (20) for holding a surgical instrument (16) such as an endoscope or retractor at a fixed position over an operating table (14) during a surgical procedure. Coarse adjustment of instrument X-Y position across the sterile field is provided by an articulated arm assembly (20A, 20B) which is rotatably coupled to the rail-mounted clamp. Fine adjustment of surgical instrument elevation above the operating table is provided by a reversible drive motor (72) which extends and retracts the surgical instrument along the longitudinal axis (C) of an extendable support arm (80). Coarse X-Y positioning of the articulated arm assembly can be performed manually upon actuation of an arm-mounted switch (62), and fine adjustment of elevation is performed upon actuation of arm-mounted switches (100, 102) or by foot pressure applied by the surgeon to floor switches (94, 96). <IMAGE> |
