Reinforced working channel tube

A method of making a working channel tube for an endoscope, the method comprising:

• a) providing a tube reinforced with a wire that is coiled and embedded between an inner surface and an outer surface of the tube, wherein a non-embedded wire portion of the wire extends out of the outer surface of the working channel tube from an exit point, wherein an exit point tangent line that is tangent to the outer surface at the exit point defines two opposite directions extending away from the exit point:
• i. an unembedded direction extending away from a final embedded wire portion leading up to the exit point;
• and
• ii. an embedded direction that is opposite the unembedded direction;
• wherein an exit plane extends through the exit point and a longitudinal axis of the working channel tube, the space extending in the unembedded and embedded directions from the exit plane being defined as the unembedded space and embedded space, respectively;
• b) fixating the tube;
• c) extending the non-embedded wire portion from the exit point to a rotation location located in the unembedded space;
• d) bending the non-embedded wire portion at the rotation location forming a bend, a first non-embedded wire sub portion extending from the exit point to the bend, and a second non-embedded wire sub portion extending after the bend;
• e) extending the second non-embedded wire sub portion across the tube to a clamping location located in the embedded space;
• f) clamping the second non-embedded wire sub portion at the clamping location in a clamp;
• and
• g) rotating the first non-embedded wire sub portion and the second non-embedded wire sub portion at the rotation location to twist the first and second non-embedded wire sub portions around each other until the wire breaks.