Prenatal ultrasonographic findings of adhesion-membrane complex and its relation with obstetric history.

Background

Intrauterine adhesions are usually detected incidentally during routine obstetric ultrasound and remain one of the reasons for concern for both clinicians and patients.

Objective

Our objective was to document ultrasonographic findings of intrauterine adhesions detected in obstetric ultrasound and to investigate their correlation with obstetric history.Study

Design

Detailed scans were performed in 685 singleton pregnancies at 16-24 weeks' gestation. Intrauterine adhesion was referred to as "adhesion-membrane complex'' (AMC). Patients were divided into three groups: Group I consisted of patients with ≥1 therapeutic D&C associated with pregnancy but with neither vaginal delivery nor Cesarean section (CS). Group II consisted of patients with ≥1 CS but with neither vaginal delivery nor therapeutic D&C associated with pregnancy. Group III consisted of patients who were in their first pregnancy. Ultrasonographic properties of AMC and relationship between AMCs and obstetric history were investigated.

Results

The incidence of AMC in Group I (n = 108), Group II (n = 189), and Group III (n = 388) was 11.1% (n = 12), 1.05% (n = 2) and 1.03% (n = 4), respectively. Positive history of D&C is associated with significantly increased risk of AMC (risk ratio:10.778; 95% confidence interval: 3.55-32.75). Also, previous history of CS is not associated with significantly increased risk of AMC (risk ratio: 1.026; 95% confidence interval: 0.19-5.55). The AMCs were located in the upper half in 7 (38,9%) and in the lower half of the uterus in 11 (61.1%) patients. The midpoint thickness of the AMC was between 0.75 and 5.10 mm (mean: 2.65 mm; SD ± 1.2). The width of the AMC was between 2 and 52 mm (mean: 20.98; SD ± 15.3), the heights of the AMCs were 5-60 mm (mean: 33.27 mm; SD ±17.0). In ten of the AMC positive patients (55.6%) a thick and bulbous free end and in eleven of them (61.1%) a "Y image" was detected. The mean gestational age at birth was 37.4 (SD ± 3.3) weeks in 18 patients with AMC. There were no intrauterine fetal or perinatal deaths. None of the neonates had congenital abnormalities.

Conclusions

Intrauterine adhesions detected in obstetric ultrasonography were redefined and renamed in a more comprehensible manner. Our results pointed out that while the positive history of D&C is associated with significantly increased risk of AMC, previous history of CS is not associated with significantly increased risk of AMC.