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Vet Comp Orthop Traumatol 2016; 29(01): 68-74
DOI: 10.3415/VCOT-15-02-0025
Original Research
Schattauer GmbH

Analysis of pelvic rotation on the standard hip ventrodorsal extended radiographic view

João Martins
1   Centre for Research and Technology of Agro-Environment and Biological Sciences, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
,
Bruno J. Colaço
1   Centre for Research and Technology of Agro-Environment and Biological Sciences, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
2   Department of Animal Science, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
,
António J. Ferreira
3   Department of Clinics, Faculty of Veterinary Medicine, Technical University of Lisbon, Lisbon, Portugal
,
Mário M. Ginja
1   Centre for Research and Technology of Agro-Environment and Biological Sciences, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
4   Department of Veterinary Science, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
› Author Affiliations
Further Information

Publication History

Received: 01 February 2015

Accepted: 06 October 2015

Publication Date:
19 December 2017 (online)

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Summary

Objectives: To study the symmetry of the iliac horizontal diameter (IHD) maximum obturator foramen width (OFW), ischiatic femoral overlap (IFO), pelvic horizontal radius (PHR), femoral head diameter (FHD), and obturator foramen area (OFA) parameters in the normal hip extended radiographic view and to evaluate the correlation of pelvic rotation with the magnitude of asymmetry of these parameters.

Methods: Nine canine cadavers from adult, large and giant breeds were radiographed in standard hip extended views and with 2°, 4° and 6° degrees of rotation. The variables IHD, OFW, IFO, PHR, FHD, and OFA were analysed in radiographs.

Results: The IHD measurements exhibited repeatability, bilateral symmetry and 95% of confidence interval of asymmetry in different pelvic rotations without superposition (p <0.05); OFW and IFO exhibited repeatability, bilateral symmetry and a small superposition in 95% of confidence interval of asymmetry according different pelvic rotations; PHR, FHD and OFA exhibited repeatability, bilateral symmetry and unacceptable superposition in 95% of confidence interval of asymmetry depending on pelvic rotation.

Clinical significance: The IHD is the recommended variable and OFW is an acceptable variable in order to evaluate slight pelvic rotation. The data may be used in qualitative analyses of hip extended radiographic views. In the future, complementary studies should be performed to evaluate the impact of degree of pelvic rotation on the hip dysplasia score.

Keywords

Iliac horizontal diameter - pelvic horizontal radius - femoral head diameter - maximum obturator foramen width - ischiatic overlap - femoral overlap - obturator foramen area
 

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