![]() Interpretation and use of BVA/KC hip scores in dogs. Further details on radiography and submission are given in the BVA’s Guidance Notes for the hip dysplasia scheme. Radiographs that are poorly positioned or which are technically substandard may be rejected if the scrutineers feel that an accurate score cannot be given. It is also important that the technical quality of the image is of a high standard with optimum contrast and definition and all the necessary labelling. It is important to avoid tilting the dog to the side (lateral rotation) as this will alter the appearance of the hips and may worsen the score, since the hip that is closer to the table may appear artefactually subluxated. Collimation must be sufficient to include the pelvis but it is not necessary to include the stifles to do so requires either incorrect centring or an unacceptably large area to be irradiated. Centring further cranially or further caudally will distort the appearance of the hip joints. It gives an excellent view of the hip joint in which all relevant anatomical areas can be seen.Ĭentring of the x-ray beam must be at the level of the hip joints, which can be achieved by palpation of bony landmarks such as the pubic symphysis and greater trochanters.It requires no special positioning aids. ![]() The extended VD position has several advantages: This position allows the femoral neck to be seen clearly, without superimposition by the greater trochanter and facilitates the detection of new bone on the femoral neck. The femora must be positioned parallel to each other and for this, the stifles are rotated slightly medially and held in position with a tie or tape so that they lie in the sagittal plane with the patella superimposed over the centre of the distal femur. The dog is positioned on its back with its hindlegs extended caudally, resulting in a position similar to that of a standing human. The radiographic view required by the BVA/KC scoring scheme, as for most other hip dysplasia schemes, is the extended ventrodorsal (VD) view. To remove the need for the animal to be held, as x-rays are potentially hazardous for anyone doing so.To permit precise positioning of the pelvis and hips.Radiographs are obtained under sedation or anesthesia for several reasons:
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