Suture collar with a flexible constraining means

A device for fastening an electrode in a pacemaker bed in a position before entry of the electrode into a vein, the device comprising a sheath, having an interior cavity extending in an axial direction therethrough for accepting the electrode, the interior cavity being reducible in cross-section for fastening the electrode in an operational position, the sheath comprising an elastic hose stretchable in the axial direction against a restoring force, which forms the interior cavity for accepting the electrode, the sheath being divided in the longitudinal direction along a circumferential separation point into at least two parts that can be moved in relation to one another in the axial direction, the circumferential separation point includes axial deviations in reference to a diametral cross-sectional plane which alternate to opposite sides such that edges of the parts of the sheath contacting at faces thereof include profiling to provide a form-fitting connection in a rotational direction and the parts can be pulled apart in the axial direction against the restoring force of the elastic hose, which contracts, to such an extent that the engaged profiling is disengaged and the two parts can be rotated against torsion or twisting of the elastic hose and are refastened against rotational movement by re-engaging in a rotated position.