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Formation of an artificial opening in a fallopian tube.

Operation forming a fistulous opening in Eustachian tube.

Formation of an opening to the oviduct.

The operation of reopening the occluded ostium, allowing the liquid to escape, excising a piece of the wall of the tube, and stitching the mucous and serous membranes together along the margin of the artificial opening, so as to form a fistula. [Gr.]