OBJECTIVE: We performed a systematic review to evaluate endovaginal cervical ultrasonography as a predictor of preterm delivery. STUDY DESIGN: Selection criteria were original published English-language reports of prospective studies including women at <37 weeks' gestation with intact amniotic membranes. Parameters and outcomes were cervical length or dilatation of the internal cervical os and preterm delivery. RESULTS: In 3 subgroups of studies including patients with preterm labor or low-risk, symptom-free patients with early (20-24 weeks) or late (27-32 weeks) ultrasonographic examination, optimal cutoff values for cervical lengths ranged between 18 and 30, 25 and 35, or 25 and 39 mm. At these cutoff values, sensitivity rates were between 68% and 100%, 33% and 54%, or 63% and 76%, and specificity rates were between 44% and 79%, 73% and 91%, or 59% and 69%, respectively. Sensitivity rates for dilatation of the internal cervical os were 70% to 100%, 16% to 25%, or 33%, and specificity rates were 54% to 75%, 95% to 99%, or 92%, respectively. CONCLUSION: In patients with symptoms of preterm labor, endovaginal cervical ultrasonography appears to be an effective predictor of preterm delivery.
OBJECTIVE: We performed a systematic review to evaluate endovaginal cervical ultrasonography as a predictor of preterm delivery. STUDY DESIGN: Selection criteria were original published English-language reports of prospective studies including women at <37 weeks' gestation with intact amniotic membranes. Parameters and outcomes were cervical length or dilatation of the internal cervical os and preterm delivery. RESULTS: In 3 subgroups of studies including patients with preterm labor or low-risk, symptom-free patients with early (20-24 weeks) or late (27-32 weeks) ultrasonographic examination, optimal cutoff values for cervical lengths ranged between 18 and 30, 25 and 35, or 25 and 39 mm. At these cutoff values, sensitivity rates were between 68% and 100%, 33% and 54%, or 63% and 76%, and specificity rates were between 44% and 79%, 73% and 91%, or 59% and 69%, respectively. Sensitivity rates for dilatation of the internal cervical os were 70% to 100%, 16% to 25%, or 33%, and specificity rates were 54% to 75%, 95% to 99%, or 92%, respectively. CONCLUSION: In patients with symptoms of preterm labor, endovaginal cervical ultrasonography appears to be an effective predictor of preterm delivery.
Authors: Joan T Price; Bellington Vwalika; Jennifer Winston; Andrew Kumwenda; Mwansa K Lubeya; Katelyn J Rittenhouse; Elizabeth Stringer; Margaret P Kasaro; Jeffrey S A Stringer Journal: Int J Gynaecol Obstet Date: 2019-04-29 Impact factor: 3.561
Authors: John Owen; Jeff M Szychowski; Gary Hankins; Jay D Iams; Jeanne S Sheffield; Annette Perez-Delboy; Vincenzo Berghella; Deborah A Wing; Edwin R Guzman Journal: Am J Obstet Gynecol Date: 2010-08-12 Impact factor: 8.661
Authors: Miha Lucovnik; Ruben J Kuon; Linda R Chambliss; William L Maner; Shao-Qing Shi; Leili Shi; James Balducci; Robert E Garfield Journal: Acta Obstet Gynecol Scand Date: 2010-12-07 Impact factor: 3.636