Surgical tubular shaft instrument for use during minimal invasive operation, has tube shaped casing overlapping bearing arms and tubular shaft, where distance of outer surfaces of arms decreases from tubular shaft to free ends of arms

摘要

The instrument has two bearing arms (13, 14) elastically bendable apart from each other and arranged in parallel at a distal end of an elongated tubular shaft (2) in a distance. A tool i.e. cutting blade (17, 18), is supported around a rotational axis running transverse to a longitudinal axis of the tubular shaft. A tube shaped casing (26) i.e. plastic tube, overlaps the arms and the tubular shaft, where a distance of outer surfaces (23, 24) of the arms decreases from the tubular shaft to free ends of the arms. The outer surfaces are designed in a cone shaped shell type.