| 摘要 |
A cannula for use in laparoscopy comprises a tubular member having a first opening at a distal end and second opening at a proximal end for enabling the longitudinal insertion through the tubular member of a first laparoscopic instrument. The tubular member is further provided with two auxiliary ports disposed on opposite sides of the tubular member and at longitudinally staggered locations. The two auxiliary ports define an auxiliary insertion path for an extra laparoscopic instrument.
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