| http://www.w3.org/ns/prov#value | - End structures (8), which may include a balloon, may be engaged, such as inflated, to limit delivery of the degrading solution to the area of occlusion (25), and may prevent or minimize retrograde flow into the uterus.FIG. 6B shows a method of reversing an occlusion by passing a guide wire or small catheter (47) through the occlusion (25), thereby clearing the blocked fallopian tube.
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