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Measurement of Thoracic Limb Joint Reference Angles in Purebred Shih-Tzu Dogs by Computed Tomography

한국임상수의학회지 2020년 37권 4호 p.169 ~ 174
정재민, 김은기, 정영은, 정성목, 이해범, 권영삼,
소속 상세정보
정재민 ( Jeong Jae-Min ) - Chungnam National University College of Veterinary Medicine
김은기 ( Kim Eun-Ki ) - Chungnam National University College of Veterinary Medicine
정영은 ( Jeong Young-Eun ) - Chungnam National University College of Veterinary Medicine
정성목 ( Jeong Seong-Mok ) - Chungnam National University College of Veterinary Medicine
이해범 ( Lee Hae-Beom ) - Chungnam National University College of Veterinary Medicine
권영삼 ( Kwon Young-Sam ) - Kyungpook National University College of Veterinary Medicine Department of Veterinary surgery

Abstract


The purpose of this study was to establish normal values for the thoracic limb joint reference angles in Shih Tzu dogs and to describe the standardized CT methodology for measuring the joint reference angle of the humerus. Five pairs of thoracic limbs of Shih Tzu dogs were collected for the CT scans in this study. Three blinded observers measured the joint reference angle of the humerus and radius for each dog by using CT scans in the frontal, sagittal, and axial planes. The means (± SDs) for the average of the right and left humeral joint reference angles were as follows: mMPHA, 83.74 ± 3.95o; mLDHA, 85.04 ± 2.57o; mCaPHA, 46.75 ± 2.20o; mCrDHA, 79.47 ± 1.97o; and HTA, 19.16 ± 2.38o. Means (± SD) for the average of right and left of the radial joint reference angles were as follows: aMPRA, 85.04 ± 1.58o; aLDRA, 87.59 ± 1.37o; aCrPRA, 84.60 ± 1.46o; aCdDRA, 84.27 ± 1.79o; and RTA, 20.91 ± 3.00o. The intraclass correlation coefficients (ICCs) of the joint reference angles for the inter- and intraobserver reliability were good to excellent, except those for the mCrHA and HTA were moderate. Our results suggest that the method of measuring joint reference angles of other long bones by using CT can be applied to thoracic limbs and can extract valid values for one specific breed.

키워드

joint reference angle; computed tomographic methodology; intraobserver reliability; shih-tzu dog

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