[Torsion rigidity of the outer sheaths of flexible medical endoscopes].

The torsion rigidity of the outer sheaths of flexible medical endoscopes was theoretically and experimentally studied. It has been shown that the bulk of the torsion rigidity of the sheaths is provided by the outer plastic sheath plus a procedure for its fastening to the braiding, as well as the braiding. A way of fastening the outer sheath to the braiding has a great impact on torsion rigidity.