Canine Hip Dysplasia (CHD) is a common hip disease in medium and large dogs. It can cause degenerative arthritis of the hip joint in dogs, and it will continue to deteriorate for life. The exact etiology and pathogenesis of CHD are not yet clear. It is generally believed that canine hip dysplasia is a polygenic genetic disease. In addition, the occurrence and development of this disease are also subject to marketing by environmental and nutritional factors. In China, the breeds of dogs are not the same as abroad. Dogs with hip dysplasia are more commonly found in Golden Retriever, Labrador, Alaska and German Shepherds. The international OFA standard scoring method is to take 2 standard x-rays (abdominal position and dorsal position frog style) when the dog is 24 months old, through the positional relationship between the hip joint and the femoral head and the degree of joint inflammation. Rate it. However, clinically, the diagnosis of the 2-year-old adult dog is very late, and the hip morphology has been formed. The University of Pennsylvania invented the pennihip method and the distraction idexx diagnostic method summarized by the Italian veterinarian to enable CHD to be diagnosed early in juvenile animals. It is expected that the animal’s morbidity after adulthood will make the basis for the implementation of early interventional treatment.

In early puppies, hip dysplasia occurred, and dogs suffered from joint instability and joint subluxation. There were no severe degenerative joint lesions and wear, and they were not very painful. At this time, the symptom that the dog owner can observe is that the puppies do not like sports and become lazy. The owner who observes carefully will find that the animals sometimes show rabbit jumping movements, and some serious puppies will involve other joints, such as excessive ankle extension, knee cruciate ligament rupture, and forelimb pain and claudication. Once degenerative arthritis occurs, painful symptoms will begin to appear. Adult dogs have more severe hip dysplasia. In addition to the above symptoms, they will also have the symptom of moving the body’s center of gravity to the forelimbs. At this time, the affected dogs will have their heads and necks stretched or bowed during exercise. When the animal moves, the swing amplitude of the hind limbs, especially the thigh, decreases, and the distance between the two feet shortens. After the animal moves, the symptoms of pain will appear obviously. Symptoms will improve with the use of painkillers. Very few very severe dogs will show signs of paralysis.

Treatment of Hip Dysplasia:

Treatment of Canine Hip Dysplasia includes conservative treatment, Early Intervention Treatment and Post-treatment. Conservative treatment is to use joint health care drugs to protect the joints, reduce body weight, proper exercise to increase the tension of the joint muscles and ligaments, use water treadmills or swimming to provide reasonable physical therapy measures.

Early intervention treatment is surgical treatment based on early diagnosis. It is recognized that more effective early treatment methods include 3.5-4.5 months old juvenile pubic symphysiodesis (JPS). Double pelvic osteomy (DPO)/ triple pelvic osteotmy (TPO) at age of 5-8 months old. Among them, the DPO operation was first reported by an Italian veterinarian in 2006. This operation improves the complications of pelvic stenosis and ischial surface elevation caused by the traditional pelvic three-blade surgery.

Post-treatment includes femoral headand neck ostectomy(FHO) and total hip replacement (THR) in dogs. The use of  femoral headand neck ostectomy is a surgery that prevents the hip joint from wearing and pain through femoral head resection. It is a technique that was used in 1965 and is still used today.

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