![]() ![]() When pelvic x-ray is normal, who needs CT? How should x-ray and CT of the pelvis be interpreted? What are the techniques for pelvic x-ray and CT? What injuries are associated with pelvic trauma? Along the way, we consider a number of critical clinical questions: Because fractures of the proximal femur are often clinically indistinguishable from fractures of the pelvis, we illustrate these injuries here, with more discussion in the chapters on extremity injuries ( Chapter 14 ) and musculoskeletal magnetic resonance imaging (MRI, Chapter 15 ). We also discuss high-risk pelvic bony injuries associated with soft-tissue and vascular injuries-which are examined in detail in related chapters on genitourinary imaging ( Chapter 12 ), abdominal trauma ( Chapter 10 ), and interventional radiology ( Chapter 16 ). In this chapter, we review a systematic approach to interpretation of the standard pelvis x-ray, correlating abnormalities with computed tomography (CT) findings. This clearly indicates that it is probably not a good idea to promote larger body sizes in its breeding," says Matt Low, researcher at the Department of Ecology, SLU.Imaging of the pelvis can be required following minor or major trauma and for nontraumatic painful conditions. We found that as the breed increases in size, its hips get worse. It was then that we decided to look at genetic correlations between genes for body size and those for hip dysplasia. "When we first analyzed the data we saw the connection between big cats and hip dysplasia. One sign is that they avoid jumping up on tables. Hip dysplasia can be painful for the cat but it can be difficult to know the degree of pain the cats feel when affected. SLU´s study shows that breeding for larger size is not a good idea since it is linked to hip dysplasia. The breed Maine Coon is sometimes called the gentle giant. In addition, this cat breed has generally been getting larger, which turned out to be an important clue. The reasons why this pattern was not obvious from simply looking at the number of cats with hip dysplasia was that many new cats are coming from a background where their parents have not previously been evaluated. The cats that originated from individuals bred according to the health program's recommendations had lower incidence and severity of the hip dysplasia in subsequent generations. ![]() But when SLU researcher Matt Low examined the statistics based on genetic kinship, he saw that the program was effective. It worried me that we still had such a large proportion of cats with hip dysplasia," says Åsa Ohlsson, researcher at the Department for Animal Breeding and Genetics, SLU.īut after 20 years of the breeding program, the numbers of new cats with hip dysplasia being examined was just as high as when the programme started, suggesting that maybe it wasn't working. "We wanted to see if the program was having an effect or if we should change something. The program itself is unique because it focusses on cats-other health programs for hip dysplasia are primarily aimed at breeding in dogs. The initiative came from Sweden but today cats from all over the world are included. And it turned out to be the case hip dysplasia was relatively common, with roughly one third of cats affected. One reason was early indications that the breed could have problems with hip dysplasia. But this new study, now published in Scientific Reports, is the largest study based on data from cats, and the first to examine heritability of the disease.Ībout 20 years ago, the health program for Maine Coon cats started in Sweden. Hip dysplasia is well known and studied in dogs. ![]()
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