Sonographic measurement of cervical volume in non-pregnant women with use of the geometric formula for a cylinder

Dimitrios Papoutsis (1) , George Daskalakis (2) , Angeliki Antonakou (3) , Alexandros Rodolakis (2) , Spiridon Mesogitis (2) , Aris Antsaklis (2)

1 First Department of Obstetrics and Gynecology
2 First Department of Obstetrics and Gynecology
3 Alexandra General Hospital, University of Athens, First Department of Obstetrics and Gynecology

Purpose: To sonographically evaluate the volume of uterine cervix in non-pregnant women with use of the geometric formula for a cylinder and to assess agreement with the reference VOCAL method. Methods: Three-dimensional ultrasound volume datasets of the uterine cervix from 81 women were obtained prospectively within a 1-year period. Volume measurements were performed using Virtual Organ Computer aided AnaLysis (VOCALTM) and the geometric formula for a cylinder. Reliability was evaluated using intraclass correlation coefficient (ICC) and Bland-Altman plots were produced to examine intermethod agreement. Time needed to perform measurements was compared with Student's t-test. Results: There was good agreement between VOCAL and the geometric formula for a cylinder (mean percentage difference, -0.78%; 95% limits of agreement, -17.59 to 16.03%). Measurements made by the formula for a cylinder were slightly greater than VOCAL by a mean (±SE) of 0.78% (±0.95%). A high degree of reliability was observed between the two methods (ICC, 0.970; 95%CI, 0.954-0.981). Cervical volume estimation with the geometric formula for a cylinder was faster to obtain. Conclusion: This method comparison study shows that the geometric formula for a cylinder has good agreement with VOCAL and can determine the volume of the cervix in a faster way.

Mots clés: Medicine

Dimitrios Papoutsis, George Daskalakis, Angeliki Antonakou, Alexandros Rodolakis, Spiridon Mesogitis, et al.. Sonographic measurement of cervical volume in non-pregnant women with use of the geometric formula for a cylinder. Journal of Clinical Ultrasound, 2011, 39 (6), pp.322. ⟨10.1002/jcu.20833⟩. ⟨hal-00638141⟩