| 摘要 |
A contraceptive device, comprising a tubular structure which has a longitudinal axis, which is at least in part configured to be radially expanded about the longitudinal axis within a lumen of a patient's reproductive system from a first tubular configuration to a second retained tubular configuration having larger transverse dimensions than the first tubular configuration, and a member within the expandable tubular structure which is configured to support tissue growth, the device being characterized by the tubular structure having over at least part of its length a first cylindrically-shaped helical coil configuration and a second radially expanded, cylindrically-shaped retained helical coil configuration which is not substantially greater than transverse dimensions of the patient's reproductive lumen and having an open framework in the second retained expanded configuration to facilitate securing at least a portion of the tubular structure along said length to a wall portion defining at least in part the lumen of a patient's reproductive system and to facilitate ingrowth of tissue cells through said length.
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