| 释义 |
DictionarySeeosEncyclopediaSeeOSincompetent cervical os
in·com·pe·tent cer·vi·cal osa defect in the strength of the internal os allowing premature dilation of the cervix.in·com·pe·tent cer·vi·cal os (in-kom'pĕ-tĕnt sĕr'vi-kăl os) A defect in the strength of the internal os allowing premature dilation of the cervix. incompetent cervical osA uterine cervix that cannot maintain a diameter small enough to support the increasing weight of the fetus. This condition usually results in early second trimester abortion. The cause is a congenital structural defect or previous trauma to the cervix. It is treated with a purse-string ligature that encircles, encloses, and reinforces the cervix. See also: os |