| Mechanical lithotripsy |
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| The
basket for mechanical lithotripsy in the bile duct shows a
very similar design to Dormia retrieval
basket, although tensile strength of the wires is much
higher. A metal lithotripsy- spiral is pushed
over the basket (left: endoscopic picture, right: x-ray)
to stabilize the device to the high occurring
tractive forces.
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The tractive forces are
mechanically
applied to the basketīs wires, which
cut the concrement to pieces. In the
given example the distal stone is
crushed first.
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The fragments then get
extracted one by one from the
bile duct. The proximal calculi are handeled in the
same way later on.
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