我们利用超声具有无创性解剖特点，在B超直视下进行畸形子宫人工流产术成功的基础上，八八年开展了超声直视下避孕环残留取环术，共12例，均取得成功。1·资料和方法：12例避孕环残留者均在基层医院进行取环术，因环断裂，嵌顿残留在子宫内，拾取不全而介来我院门诊就诊者，其 Based on the successful non-invasive anatomic features of ultrasound and the success of deformity uterus artificial abortion under B-mode ultrasound, we carried out the use of ultrasound-guided residual loop extraction in 18 cases, all of which achieved success. 1 · Materials and Methods: Twelve cases of residual contraceptive ring were taken in the primary hospital for ring surgery, due to ring fracture, incarcerated residues in the womb, incomplete pickup and referral to our outpatient clinic, its