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Comparison of three methods to quantify laxity in the canine hip joint

Bart Broeckx (UGent) , Aldo Vezzoni, Evelien Bogaerts (UGent) , Mileva Bertal, Tim Bosmans (UGent) , Emmelie Stock (UGent) , Dieter Deforce (UGent) , Luc Peelman (UGent) and Jimmy Saunders (UGent)
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Abstract
Objectives: Comparison of PennHIP and a novel method to diagnose hip laxity, called the Vezzoni modified Badertscher distension device technique. Methods: In a total of 10 dogs, it was first assessed whether the distraction index (DI) from the PennHIP evaluation center could be reproduced by two individual observers. In the next two steps, the DI measurements made by the individual observers and the PennHIP evaluation center were compared with the laxity index (LI) measured on the Vezzoni modified Badertscher distension device view. Finally, the interobserver agreement of the DI, LI and Norberg angle was assessed and compared with classification criteria. Results: The results were similar for the first three comparisons: there was no evidence for bias, the relation between DI and LI was linear and the variability was small. A comparison of the interobserver agreement showed that the measurement variability for the NA was substantial, while the reproducibility for the DI and LI was equal. Clinical Significance: While the standard ventrodorsal hip extended radiograph is most commonly used for diagnosis and screening of canine hip dysplasia, it lacks sensitivity to diagnose laxity. To improve the identification of hip joint laxity, distraction-based radiographic techniques are helpful. The Vezzoni modified Badertscher distension device technique allows for a reliable in-house evaluation of canine hip joint laxity.
Keywords
canine hip dysplasia, laxity, PennHIP, Vezzoni modified Badertscher distension device, DISTRACTION INDEX, NORBERG ANGLE, DYSPLASIA, DOGS, BREEDS, OSTEOARTHRITIS, RADIOGRAPHY, DIAGNOSIS

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Chicago
Broeckx, Bart, Aldo Vezzoni, Evelien Bogaerts, Mileva Bertal, Tim Bosmans, Emmelie Stock, Dieter Deforce, Luc Peelman, and Jimmy Saunders. 2018. “Comparison of Three Methods to Quantify Laxity in the Canine Hip Joint.” Veterinary and Comparative Orthopaedics and Traumatology 31 (1): 23–29.
APA
Broeckx, B., Vezzoni, A., Bogaerts, E., Bertal, M., Bosmans, T., Stock, E., Deforce, D., et al. (2018). Comparison of three methods to quantify laxity in the canine hip joint. VETERINARY AND COMPARATIVE ORTHOPAEDICS AND TRAUMATOLOGY, 31(1), 23–29.
Vancouver
1.
Broeckx B, Vezzoni A, Bogaerts E, Bertal M, Bosmans T, Stock E, et al. Comparison of three methods to quantify laxity in the canine hip joint. VETERINARY AND COMPARATIVE ORTHOPAEDICS AND TRAUMATOLOGY. 2018;31(1):23–9.
MLA
Broeckx, Bart et al. “Comparison of Three Methods to Quantify Laxity in the Canine Hip Joint.” VETERINARY AND COMPARATIVE ORTHOPAEDICS AND TRAUMATOLOGY 31.1 (2018): 23–29. Print.
@article{8570127,
  abstract     = {Objectives: Comparison of PennHIP and a novel method to diagnose hip laxity, called the Vezzoni modified Badertscher distension device technique. 
Methods: In a total of 10 dogs, it was first assessed whether the distraction index (DI) from the PennHIP evaluation center could be reproduced by two individual observers. In the next two steps, the DI measurements made by the individual observers and the PennHIP evaluation center were compared with the laxity index (LI) measured on the Vezzoni modified Badertscher distension device view. Finally, the interobserver agreement of the DI, LI and Norberg angle was assessed and compared with classification criteria. 
Results: The results were similar for the first three comparisons: there was no evidence for bias, the relation between DI and LI was linear and the variability was small. A comparison of the interobserver agreement showed that the measurement variability for the NA was substantial, while the reproducibility for the DI and LI was equal. 
Clinical Significance: While the standard ventrodorsal hip extended radiograph is most commonly used for diagnosis and screening of canine hip dysplasia, it lacks sensitivity to diagnose laxity. To improve the identification of hip joint laxity, distraction-based radiographic techniques are helpful. The Vezzoni modified Badertscher distension device technique allows for a reliable in-house evaluation of canine hip joint laxity.},
  author       = {Broeckx, Bart and Vezzoni, Aldo and Bogaerts, Evelien and Bertal, Mileva and Bosmans, Tim and Stock, Emmelie and Deforce, Dieter and Peelman, Luc and Saunders, Jimmy},
  issn         = {0932-0814},
  journal      = {VETERINARY AND COMPARATIVE ORTHOPAEDICS AND TRAUMATOLOGY},
  language     = {eng},
  number       = {1},
  pages        = {23--29},
  title        = {Comparison of three methods to quantify laxity in the canine hip joint},
  url          = {http://dx.doi.org/10.3415/vcot17-05-0064},
  volume       = {31},
  year         = {2018},
}

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