Surgical device and accessories

Surgical device for surgical intervention, comprising a surgical instrument having an elongate instrument body having (i) a rigid instrument inner end guidable/steerable to an operation field in a human or animal body, (ii) a rigid instrument outer end operable by a user, (iii) a flexible instrument middle part resisting compression along a longitudinal axis and adapted to resist torsion around a longitudinal axis which connects said instrument outer end to said instrument inner end;

• the surgical device further comprising a sleeve having an elongate tubular body having a telescopic sleeve inner end, a telescopic sleeve outer end and a tubular sleeve middle part, the tubular sleeve middle part having an outer diameter adapted to be inserted into a human or animal body to access the operation field, the sleeve further having a first articulation provided between the sleeve outer end and the sleeve middle part and a second articulation provided between the sleeve inner end and the sleeve middle part;
• the surgical instrument being arranged in the trocar sleeve such that the instrument middle part is located in the sleeve middle part and extends through the first articulation and the second articulation into the sleeve outer end and the sleeve inner end respectively;
• the sleeve inner end surrounds at least partly the instrument inner end, and the sleeve outer end surrounds at least partly the instrument outer end;
• the sleeve comprising a force transmission unit for maintaining same articulation angle at the first articulation and at the second articulation by rotating the sleeve inner end with respect to the sleeve middle part by the same rotational angle and in the same rotational direction as the sleeve outer end is rotated relative to the sleeve middle part;
• and
• the flexible instrument middle part being formed as a slidable flexible sheath and being dimensioned to transfer axial movement of the sleeve outer end to the sleeve inner end relative to the sleeve middle part by the same extent but in the opposite direction upon displacement within the sleeve tubular body by elongating the telescopic sleeve inner end when the telescopic sleeve outer end is compressed, and by contracting the telescopic sleeve inner end when the telescopic sleeve outer end is elongated.