Determining the Incidence of Gynecoid Pelvis Using Three-Dimensional Computed Tomography in Nonpregnant Multiparous Women

Şalk, İsmail; Çetin, Meral; Şalk, Sultan; Çetin, Ali

doi:10.1159/000440808

Cited by 15 publications

(9 citation statements)

References 22 publications

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“…This combination of pelvic features is also called “funnel-shaped pelvis” [22,23]. Our findings confirmed those of previous studies [22,23], which showed the influence that a funnel-shaped pelvic plays in pelvic arrest.…”

Section: Discussionsupporting

confidence: 91%

Which Foetal-Pelvic Variables Are Useful for Predicting Caesarean Section and Instrumental Assistance

Frémondière

Thollon

Adalian³

et al. 2017

Med Princ Pract

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Objective: To assess the variables useful to predict caesarean delivery (CD) and instrumental assistance, through the analysis of a large number of foetal-pelvic variables, using discriminant analysis. Materials and Methods: One hundred and fourteen pregnant women were included in this single-centre prospective study. For each mother-foetus pair, 43 pelvic and 18 foetal variables were measured. Partial least squares-discriminant analysis was performed to identify foetal-pelvic variables that could statistically separate the 3 delivery modality groups: spontaneous vaginal delivery (SVD), CD, and instrument-assisted delivery (IAD). Results: For the SVD versus CD model, voluminous foetuses and women with a narrow pelvic inlet had a greater risk for requiring CD. The most efficient variables for discrimination were the transverse diameter and foetal weight. The antero-posterior inlet and obstetric conjugate were considered in this model, with the former being a useful variable but not the latter. For the SVD versus IAD model, the most important variables were the foetal variables, particularly the bi-parietal diameter. Women with a reduced antero-posterior outlet diameter and a narrow pubic arch were more at risk of requiring an IAD. Conclusion: The antero-posterior inlet was an efficient variable unlike the obstetric conjugate. The obstetric conjugate diameter should no longer be considered a useful variable in estimating the arrest of labour. Antero-posterior inlet diameter was a sagittal variable that should be taken into account. The comparison of sub-pubic angle and bi-parietal and antero-posterior outlet diameters was useful in identifying a risk of requiring instrumental assistance.

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Section: Discussionsupporting

confidence: 91%

Which Foetal-Pelvic Variables Are Useful for Predicting Caesarean Section and Instrumental Assistance

Frémondière

Thollon

Adalian³

et al. 2017

Med Princ Pract

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“…In the group of normal pelvis, the 10th and 90th percentiles were quite close to the median measures with a gap a centimeter order. These data indicate that pelvis measurements in the human species are relatively well conserved and consistent with standard cephalic size delivery (biparietal diameter estimated at 9.6 cm for normal) (Salk et al, 2015). In the group of pathological pelvis the median values of different diameters were too low, as well as the foetus: cranial perimeter of 34.50 cm against 35 cm in the normal pelvis and an average weight of 2925 g against 3090 g. The difference between the normal median values and the previous radiological reference is approximatively 1 cm.…”

Section: Outcome Of Deliveriessupporting

confidence: 68%

CT pelvimetry of variant pelvis and child birth prognosis

Lalèyè¹,

Azonbakin²,

Delmas³

et al. 2018

Anat. J. Afr.

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The aim of this study was to determine the threshold values of pelvimetry by scanning and to evaluate the ability of the pelvimetry alone to diagnose a fetal-pelvic disproportion. It was an observational retrospective study on 410 pregnant women who had a scanner pelvimetry for any reasons. Based on the fetal presentations, two subgroups (breech and cephalic -others) have been defined. Measurements of the main obstetric diameters (promonto-retropubic, median transverse and dual sciatica) were taken. The 5th and 10th percentile were calculated as well as the 90th and 95th to determine the threshold values of pelvimetry by scanner. The scanner values found on CT were compared with the standard X ray pelvimetry values. Referring to extreme values obtained by pelvimetry scanner, some pathological pelvic brim were reconstructed in 3D. Moreover, the delivery prognostic was analyzed by crossing the pelvic inlet dimensions (Magnin index) and pelvic outlet dimensions (bi-sciatic diameter) with the outcome of the delivery. The mean values of the scanno-pelvimetry measurement in our series were:m12,39 cm (± 1) for the promonto-retropubic diameter, 12.88 cm (± 1.01) for the transverse median diameter and 11 cm (± 1.32) for the bi-sciatic diameter. These measurements provided an accuracy less than 1 cm compared to the standard ray pelvimetry. Although Magnin index at 23 allows a vaginal delivery, 51% of oursample have failed. Moreover, for the Magnin index at 24 and 25, the vaginal delivery failure rate remains high:45.1% and 39.61% respectively. Compared to classical pelvimetry, pelvimetry by scanner provides additional precision and allows to study the geometry of the basin. However, the pelvimetry alone could not be effective to establish the prognosis of vaginal delivery.Keywords: scanno-pelvimetry, prognosis, delivery

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“…The variation of pelvic architecture could influence the bladder volume with fullness. There are four main types of the pelvis in humans, namely the gynecoid, android, anthropoid, and platypelloid types; the gynecoid type is round with a wide-open outlet, which is the most common type (about 51.3%) in females for vaginal delivery [ 19 ]. The android type of pelvis is narrow with heart-shape, which is found in most of the males or females with more physical activity in the adolescence period [ 20 ].…”

Section: Discussionmentioning

confidence: 99%

Novel Three-Dimensional Bladder Reconstruction Model from B-Mode Ultrasound Image to Improve the Accuracy of Bladder Volume Measurement

Chang

Liu

et al. 2021

Sensors

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Traditional bladder volume measurement from B-mode (two-dimensional) ultrasound has been found to produce inaccurate results, and thus in this work we aim to improve the accuracy of measurement from B-mode ultrasound. A total of 75 electronic medical records including ultrasonic images were reviewed retrospectively from 64 patients. We put forward a novel bladder volume measurement method, in which a three-dimensional (3D) reconstruction model was established from conventional two-dimensional (2D) ultrasonic images to estimate the bladder volume. The differences and relationships were analyzed among the actual volume, the traditional estimated volume, and the new reconstruction model estimated volume. We also compared the data in different volume groups from small volume to high volume. The mean actual volume is 531.8 mL and the standard deviation is 268.7 mL; the mean percentage error of traditional estimation is −28%. In our new bladder measurement method, the mean percentage error is −10.18% (N = 2), −4.72% (N = 3), −0.33% (N = 4), and 2.58% (N = 5). There is no significant difference between the actual volume and our new bladder measurement method (N = 4) in all data or the divided four groups. The estimated volumes from the traditional method or our new method are highly correlated with the actual volume. Our data show that the three-dimensional bladder reconstruction model provides an accurate measurement from conventional B-mode ultrasonic images compared with the traditional method. The accuracy is seen across different groups of volume, and thus we can conclude that this is a reliable and economical volume measurement model that can be applied in general software or in apps on mobile devices.

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Determining the Incidence of Gynecoid Pelvis Using Three-Dimensional Computed Tomography in Nonpregnant Multiparous Women

Cited by 15 publications

References 22 publications

Which Foetal-Pelvic Variables Are Useful for Predicting Caesarean Section and Instrumental Assistance

Which Foetal-Pelvic Variables Are Useful for Predicting Caesarean Section and Instrumental Assistance

CT pelvimetry of variant pelvis and child birth prognosis

Novel Three-Dimensional Bladder Reconstruction Model from B-Mode Ultrasound Image to Improve the Accuracy of Bladder Volume Measurement

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