| 摘要 |
A surgical instrument ( 1 ) for the removal of tissue comprises an outer tube ( 2 ) having an opening ( 22 ) for the removal of tissue, fashioned in a distal region, preferentially in the vicinity of the distal end of the outer tube ( 2 ). It further comprises an inner tube ( 3 ) disposed in the outer tube ( 2 ) and having a rigid proximal region for transferring forces or momenta acting on this proximal region to a distal region of the inner tube ( 3 ), preferentially to the distal end of the inner tube ( 3 ). The instrument further comprises a cutting tool ( 4 ) disposed at the distal region of the inner tube ( 3 ), preferentially at the distal end of the inner tube ( 3 ), for facilitating cutting of tissue which is subjected to the action of the cutting tool ( 4 ) in the vicinity of the opening ( 22 ) in the distal region of the outer tube ( 2 ), wherein the inner tube ( 3 ) has a flexible region ( 31 ) located between its rigid proximal region and the cutting tool ( 4 ). The inner tube ( 3 ) has a slit ( 5, 5 a) in its wall in the flexible region ( 31 ) which, as viewed in the longitudinal direction of the inner tube ( 3 ) winds in a helical fashion about the longitudinal axis (L) of the inner tube ( 3 ) and meanders back and forth with respect to this helical line ( 52, 52 a).
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