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Abstract To investigate the diagnostic values of the endometrial basal blood flow parameters and endometrial thickness of women examined by transvaginal twodimensional ultrasound for their intrauterine adhesions (IUA) and the degree of IUA. Methods: 100 women with IUA were selected in group A, and were divided into 15 cases with ⅠIUA in group A1, 20 cases with ⅡIUA in group A2, 31 cases with Ⅲ IUA in group A3, 19 cases with ⅣIUA in group A4, and 15 cases with ⅤIUA in group A5 according to the degree of IUA by the classification criteria of the European Society for Gynecological Endoscopy in 1998 from January 2019 to January 2022. Another 100 healthy women were selected in group B. The values of pulse index (PI), the resistance index (RI), systolic to diastolic flow rate ratio (S/D), and the endometrial thickness (EN) of the women were compared between group A and group B, and among group A1, group A2, group A3, group A4, and group A5. The diagnostic efficacy of the combined values of PI, RI, S/D, and ET of the women for their IUA and the degree of IUA was analyzed. Results: The values of PI, S/D, and RI of the women in group A were significantly higher than those of the women in group B, while the ET value of the women in group A was significantly lower. The values of PI, S/D, and RI of the women in group A1, group A2, group A3, group A4, and group A5 had increased gradually, while the ET value of the women had decreased gradually (all P＜0.05). Through analysis, the specificity of the combined detections of PI, S/D, RI, and EN of the women for diagnosing their IUA was 97.0%, which was significantly higher than that (89.0%, 88.0%, 55.0%, or 74.0%) of the PI, S/D, RI, or EN detection alone. Based on the results of the analysis of receiver operator characteristic curve, the area under the curve of the combined values of PI, S/D, RI, and EN of the women for diagnosing their IUA, and I IUA, ⅡIUA, Ⅲ IUA, Ⅳ IUA, and Ⅴ IUA were 0.984, 0.879, 0.896, 0.802, 0.847, and 0.862, respectively, which had all increased significantly (all P＜0.05). Conclusion: The parameters of endometrial basal blood flow and endometrial thickness examined of the women by transvaginal two-dimensional ultrasound for diagnosing their IUA and the degree of IUA have some clinical guidance values.
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