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The fetal-pelvic index has minimal utility in predicting fetal-pelvic disproportion.
- Source :
- American Journal of Obstetrics & Gynecology; Nov98, Vol. 179 Issue 5, p1186-1192, 7p
- Publication Year :
- 1998
-
Abstract
- <bold>Objective: </bold>Our purpose was to evaluate the fetal-pelvic index in our patient population and to determine whether it would be predictive of route of delivery.<bold>Study Design: </bold>One hundred seventy-six patients with a previous history or clinical findings in the current pregnancy suggestive of fetal-pelvic disproportion participated in this Human Investigation Committee-approved study. All underwent fetal ultrasonographic examinations and modified digital radiography before labor. Fetal head and abdominal circumferences and maternal inlet and midpelvic circumferences were determined, and the fetal-pelvic index was calculated.<bold>Results: </bold>Ninety-one patients fulfilled all aspects of the study, including rigorous criteria pertaining to labor management. Thirty of these patients underwent cesarean delivery and 61 were delivered vaginally. The fetal-pelvic index value for the vaginal delivery group was -5.4 +/- 5.3, as opposed to -2.4 +/- 5.8 in the cesarean delivery group (P <.02). Notwithstanding this difference, the fetal-pelvic index had a low overall ability to predict fetal-pelvic disproportion (0.65) and had associated sensitivity and specificity of 0.27 and 0.84, respectively. Predictive thresholds other than zero were tested, but optimal predictive ability, at a fetal-pelvic index cutoff of 2, was only 70% (sensitivity 0.20, specificity 0.95).<bold>Conclusion: </bold>In our patient population the fetal-pelvic index was only moderately predictive of fetal-pelvic disproportion. Factors other than those assessed by the fetal-pelvic index are probably important in determining the route of delivery. Further studies are indicated. [ABSTRACT FROM AUTHOR]
- Subjects :
- PREGNANCY
OBSTETRICS
PELVIMETRY
DELIVERY (Obstetrics)
Subjects
Details
- Language :
- English
- ISSN :
- 00029378
- Volume :
- 179
- Issue :
- 5
- Database :
- Supplemental Index
- Journal :
- American Journal of Obstetrics & Gynecology
- Publication Type :
- Academic Journal
- Accession number :
- 1337653
- Full Text :
- https://doi.org/10.1016/S0002-9378(98)70129-2