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[Vaginal sonography in the diagnosis of and therapeutic indications in cervical incompetence].

Besides its contribution to the diagnosis, the vaginal sonography or transvaginal ultrasound is a remarkable support in the indication of the treatment of cervical incompetence and its control after cerclage. The study group consisted of 40 patients, their gestational age between 16 and 29 weeks, admitted in the department for cervical incompetence. After transvaginal ultrasound examination combined to the results of clinical evaluations, 32 pregnant women were retained for cervical cerclage. The other cases were given only medical treatment. It springs out from the analyse of the criteria of exploration, the absence of a funnel shaped formation of internal os in the cases non retained for cervical cerclage at the vaginosonography examination. Likewise, but in a less degree (6/8) a cervical dilatation greater than or equal to 10 mm. The softening of the cervix was also absent in the majority of the cases (5/8) at the clinical examination. On the contrary, the cervix was shortened in all cases, both in clinical and ultrasound examination. Another important element is the advanced gestational age which is in favour of medical treatment and ultrasound check up. The average gestational age of the group without cerclage is 26.87 weeks and that of the whole study group is 23.64 weeks. The vaginalsonography makes possible the follow up, in the postoperative periods after cervical cerclage and the appreciation of the outline of internal os and the localisation of the band used for cerclage.