Transvaginal cerclage for managing recurrent pregnancy loss
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Standard treatment options for cervical insufficiency depend on the patient’s history. One of the treatment mainstays for women with prior second-trimester losses or preterm deliveries is transvaginal cervical cerclage. A transvaginal cerclage can be placed using either a Shirodkar technique, in which the vesicocervical mucosa is dissected and a suture is placed as close to the internal cervical os as possible, or a McDonald technique, in which a purse-string suture is placed around the cervicovaginal junction.

Indications for transvaginal cerclage.
The indication for transvaginal cerclage is based on history, physical exam, or ultrasonography. A physical-exam indication is the most straightforward of the 3. Transvaginal cerclage placement is indicated if on physical exam in the second trimester a patient has cervical dilation without contractions or infection. A history-indicated cerclage (typically placed between 12 and 14 weeks’ gestation) is based on a cerclage having been placed in a prior pregnancy due to painless cervical dilation in the second trimester (either ultrasonography- or physical-exam indicated), and it also can be considered in the case of a history of 1 or more second-trimester pregnancy losses related to painless cervical dilation. More recent evidence suggests that in patients with 1 prior second-trimester loss or preterm delivery, serial sonographic cervical length can be measured safely from 16 to 24 weeks, with a cerclage being placed only if cervical length decreases to less than 25 mm. By using the ultrasonography-based indication, unnecessary history-indicated cerclages for 1 prior second-trimester or preterm birth can be avoided in more than one-half of patients.

Source:https://www.mdedge.com/obgyn/article/221832/obstetrics/transabdominal-cerclage-managing-recurrent-pregnancy-loss
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