Evaluation of the Association between Pelvic Diameters and Pelvic Types on Computed Tomography Images in Healthy Turkish Females

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Özandaç Polat S., Işık E. İ., Vurallı D., Öksüzler M., Öksüzler F. Y., Özşahin E., ...More

INTERNATIONAL JOURNAL OF MORPHOLOGY, vol.41, no.6, pp.1781-1788, 2023 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 41 Issue: 6
  • Publication Date: 2023
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, EMBASE
  • Page Numbers: pp.1781-1788
  • Çukurova University Affiliated: Yes


Pelvis contributes to both human locomotion and obstetrics, and normal vaginal delivery is associated with a spacious

inlet, a large interspinosus diameter. This paper aimed to measure crucial diameters of pelvic ring, and to determine both the prevalence of pelvic

types, and labor types including normal vaginal delivery or caesarean section in Turkish healthy females. Additionally, it was aimed to evaluate

presence of relationship between pelvic types and pelvic diameters. Labor shape of subjects was obtained from hospital records. This retrospective

study was carried out on 165 healthy subjects aged between 18 and 45 years. Anteroposterior diameter of the pelvic inlet (APDI), anteroposterior

diameter of the pelvic outlet, sacrum length (SL), sacrum depth, conjugata vera, obstetrical conjugate, the diagonal conjugate, diameter transversa,

diameter bispinous, intertuberous diameter were measured. From these measurements, brim index was calculated and decided to gynecoid,

anthropoid and platypelloid type. Also, the andoid type was calculated to the ratio of posterior sagittal diameter of the inlet to conjugata

obstetrica. 50.91 % of participants has gynecoid type pelvis, followed by 24.85 % anthropoid type, 14.55 % platypelloid, and 9.70 % android

type pelvis. There was a significant difference in APDI, SL, SD, Conjugata vera, Conjugata obstetrica, Conjugata diagonalis, Conjugata transversa,

diameter bispinous, diameter intertubercularis and Brim index measurements according to pelvic types. the first degree of narrowing (conjugata

vera from 11 to 9) was found in 18 pelvises and 12 pelvises with the pathological degree of narrowing bellonged to the platypelloid type

followed by android type pelvis with 6 pelvices. The android type pelvis is not appropriate for natural labor and a good assessment of birth canal

can reduce the labor risks. Also, only 7 females who delivered with cesarean have gynecoid type pelvic type. The APDI and SL were significantly

lower in subjects having pathological narrowing according to conjugata obstetrica values.