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[Does the "fatty pelvis" exist? Quantitative computer tomography studies].

A Wischnik1, K J Lehmann, M Ziegler

  • 1Frauenklinik, Fakultät für Klinische Medizin Mannheim, Universität Heidelberg.

Zeitschrift Fur Geburtshilfe Und Perinatologie
|November 1, 1992
PubMed
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Obesity does not always lead to difficult childbirth due to increased pelvic fat. Quantitative analysis shows fat compartments in the pelvis have weak correlations with body weight and height indices.

Area of Science:

  • Medical Imaging
  • Anatomy
  • Obstetrics

Background:

  • Adiposity is often assumed to cause soft tissue dystocia.
  • Increased fat within the small pelvis may reduce birth canal diameters.

Purpose of the Study:

  • To quantitatively assess pelvic fat compartments.
  • To determine the correlation between fat compartments and body weight/height indices.
  • To evaluate the impact of fat tissue on birth canal dimensions.

Main Methods:

  • Computed tomography (CT) of the pelvis in 50 patients.
  • Quantitative assessment of intra- and extra-pelvic fat compartments using planimetry.
  • Calculation of functional reduction in birth canal diameters.

Main Results:

Related Experiment Videos

  • Pelvic fat compartments showed weak correlation with body weight and Rohrer-Index.
  • The impact of weight/height on pelvic space was most pronounced at the pelvic brim.
  • This effect diminished towards the mid-pelvis and pelvic outlet.

Conclusions:

  • The assumption that obesity invariably causes soft tissue dystocia due to larger pelvic fat compartments is not supported.
  • Pelvic fat distribution and its functional impact on the birth canal are complex and vary by pelvic level.