目的评价Donut征在诊断输卵管妊娠中的有效性。方法入选85例临床超声观察有Donut征的拟诊断异位妊娠患者,对75例能适度充盈膀胱患者先行经腹部超声检查,所有患者再行经阴道超声检查。结果 75例经腹超声患者发现Donut征38例,实性团块回声26例,未见明显异常发现11例。85例经阴道患者发现Donut征84例,1例显示不满意。对75例经腹部超声及阴道超声检查结果进行对比分析:经腹部超声观察发现Donut征38例,而经阴道超声发现74例。χ2=43.174,P<0.05。85例临床拟诊断为异位妊娠、超声检查发现Donut征的患者,均经腹腔镜诊治,经病理证实为输卵管妊娠。结论 Donut征是早期诊断输卵管妊娠的极有价值的征象,而经阴道超声是尽早发现Donut征有效方法。 Objective To evaluate the effectiveness of Donut sign in the diagnosis of tubal pregnancy. Methods Eighty-five patients with suspected ectopic pregnancy undergoing Donut sign were enrolled in this study. Totally 75 patients with adequate bladder filling were examined by transabdominal ultrasonography and all patients underwent transvaginal ultrasonography. Results 75 cases of Donut sign were found in 38 cases of transabdominal ultrasound, 26 cases of solid mass echo, 11 cases were not found abnormally. 84 cases of Donut’s sign were found in 85 cases of vaginal patients, 1 case was not satisfied. 75 cases of transvaginal ultrasonography and vaginal ultrasound examination results were compared: abdominal ultrasonography found Donut sign in 38 cases, while the transvaginal ultrasound was found in 74 cases. χ2 = 43.174, P <0.05.85 cases were clinically diagnosed as ectopic pregnancy, ultrasound examination found Donut sign patients were diagnosed by laparoscopy, pathologically confirmed as tubal pregnancy. Conclusion Donut sign is an extremely valuable sign for the early diagnosis of tubal pregnancy, and transvaginal sonography is an effective method for early detection of Donut sign.