Bi-acetabular distance - Dog - axes and angles - Pelvis - vet-Anatomy
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Bi-acetabular distance

Bi-acetabular distance

  • Synonym: Inner distance between the two acetabuli
  • Acronym: BAD

Definition

Stephan Mahler

The bi-acetabular distance is a pelvic measurement used to assess the anatomy of the pelvic area, particularly in the context of obstructive dystocia and constipation. It is determined from a ventrodorsal radiograph or multiplanar reconstructed CT images of the pelvis.

The bi-acetabular distance is the distance between the two acetabuli, perpendicular to the sagittal plane.

The mean values reported in the literature for the bi-acetabular distance with are :

  • In Boston terrier with normal parturition (7.5 +/- 1.1 kg) and dystocia (7.5 +/- 0.8 kg) respectively : 3.9 +/- 0.09 cm and 3.8 +/- 0.11 cm

  • In Scottish terrier with normal parturition (9.5 +/- 0.9 kg) and dystocia (9.8 +/- 0.8 kg) respectively : 4.0 +/- 0.08 cm and 4.1 +/- 0.07 cm

References

  • Eneroth et al. (1999). Radiographic pelvimetry for assessment of dystocia in bitches: a clinical studv in two terrier breeds. Journal of Small Anmal Practice. J Small Anim Pract;40.257-264. DOI: 10.1111/j.1748-5827.1999.tb03076.x

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