Key result
Ultrasound links cervical incompetence to a ~54% wider internal os compared to normal obstetric histories.
Why the study?
A new and objective ultrasonographic procedure during pregnancy was developed to provide an additional method for diagnosing cervical incompetence.
Does ultrasonography measurement of the internal os width differ between pregnant women with cervical incompetence and those with normal obstetric histories?
Population
24 pregnant patients planned for McDonald operation and 19 women with normal obstetric histories
Comparison
Ultrasonography measurement of internal os width in suspected cervical incompetence vs normal obstetric history
Design
Case-control study
Authors
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May support objective cervical incompetence assessment; leaves open diagnostic thresholds and prospective validation before clinical adoption.
Case-Control (n=43)
Does ultrasonography measurement of the internal os width differ between pregnant women with cervical incompetence and those with normal obstetric histories?
Absolute Event Rate: 2.57% vs 1.67%
p-value: p=<0.001
Ultrasonography provides an objective method to measure the internal os width during pregnancy, aiding in the diagnosis of cervical incompetence.
Brook et al. (1981) conducted a case-control in Cervical incompetence in pregnancy (n=43). Ultrasonography to measure internal os width vs. Women with normal obstetric histories was evaluated on Mean width of the internal os (p=<0.001). Ultrasonography revealed a significantly wider internal os in pregnant women with cervical incompetence compared to those with normal obstetric histories (2.57 cm vs 1.67 cm; p<0.001).