Lundh C, Lindmark G, Wilbrand H
Acta Obstet Gynecol Scand. 1986;65(5):411-6. doi: 10.3109/00016348609157374.
The purpose of this study was to assess the reliability of radiographic pelvimetry. 48 radiologists were asked to estimate the pelvic inlet and outlet diameters from copies of 20 pelvimetry radiographs. We found that every third patient will have the sum of her pelvic outlet over- or underestimated by at least 4 mm, and 3% by more than 10 mm. The random measurement error of the sum of the pelvic outlet is about four times greater than the systematic error. The random error of the sagittal outlet diameter contributes to almost half of the total measurement error of the pelvic outlet sum. The measurement values of radiographic pelvimetry are often expressed in mm, which may give an impression of exactness that is obviously not well founded. Only in a few cases where the measurements suggest a severe feto-pelvic disproportion is it justified to do an elective cesarean section on the basis of radiographic pelvimetry only.
本研究的目的是评估X线骨盆测量的可靠性。我们要求48位放射科医生根据20张骨盆测量X线片的复印件来估计骨盆入口和出口直径。我们发现，每三位患者中就有一位骨盆出口径线之和被高估或低估至少4毫米，3%的患者被高估或低估超过10毫米。骨盆出口径线之和的随机测量误差约为系统误差的四倍。矢状径出口直径的随机误差几乎占骨盆出口径线总和测量总误差的一半。X线骨盆测量的测量值通常以毫米为单位表示，这可能会给人一种精确的印象，但显然没有充分依据。只有在少数测量结果提示严重头盆不称的情况下，仅根据X线骨盆测量进行选择性剖宫产才是合理的。
