Assessment of β-human chorionic gonadotropin level as a reliable predictor of tubal patency confirmed with transvaginal ultrasound-guided selective salpingography (TVSSG) following conservative treatment of tubal pregnancy.

OBJECTIVE

To try putting the β-hCG level as a reliable predictor for tubal patency for women, who had previously undergone expectant treatment or who had received systemic methotrexate injection because of tubal pregnancy, and to simply check their tubal patency using a newly proposed procedure, a transvaginal ultrasound guided selective salpingography (TVSSG).

METHODS

One hundred and sixty patients were submitted to TVSSG after tubal pregnancy treatment. TVSSG was subsequently performed in the follicular phase of the menstrual cycle after the clinical treatment of tubal pregnancy. One hundred patients received expectant management and 60 were treated with single-dose methotrexate (50 mg/m(2) intramuscularly).

RESULTS

Of 160 patients (235 fallopian tubes examined), the affected tube was observed to be patent by TVSSG in 84 and 78%, respectively (P > 0.05). The contralateral tube was patent in 93%. Forty patients became pregnant and were thus not subsequently assessed with laparoscopy. Ten of these pregnancies ended in a miscarriage and five in a recurrent tubal pregnancy. The concordance of 86% for Fallopian tubes was achieved between the TVSSG and laparoscopy by the gold standard method. After the logistic regression was performed, it was observed that the levels of β-hCG > 5,000 mUI/ml were directly related to the tubal obstruction risk, odds ratio = 11.7 (95% CI = 2.27-61.32).

CONCLUSIONS

In the current study, the probability of ipsilateral tubal obstruction depends on the β-hCG levels. The increase in β-hCG levels is followed by an enhancement in tubal obstruction risk. Therefore, assessment of the β-hCG may be an effective tool for the prognosis of the reproductive future of these patients.