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June 9, 2020 at 1:25 pm #3255AnonymousInactive
Dysplasia of hip joint is the abnormal development of hip joint. It is characterized by subluxation and complete dislocation of the joints in young dogs and degenerative arthropathy in old dogs. The dislocation of hip joint is the complete separation of femoral head and acetabulum. So subluxation is partial or incomplete separation.
Bone anatomy of hip. The red line in the figure divides the femoral head in the acetabulum, accounting for only about 1 / 4 of the femoral head, which is a serious developmental abnormality of hip joint.
1.What is the symptom of dysplasia of hip: Dysplasia of hip in young dogs often occurs in large and medium-sized dogs. Common dogs in cities are golden retriever, Labrador, German shepherd, Alaskan, Rowena, etc. generally, the earliest puppies of 5-10 months old will show symptoms, such as limping or weakness of hind legs when standing up There are serious “rabbit jumping” behaviors, but the hip joint of old dogs is abnormal regardless of breed. There are many obese dogs. After the age of 8, there are often degenerative diseases. It is difficult to stand up after rest, limp after exercise, do not want to exercise, swing after driving, and acute attack will suddenly suspend limp.
2.Why does dysplasia of the hip joint cause my dog’s hind legs to walk powerless? Dysplasia of the hip joint is a multifactor disease. There are genetic and environmental factors in the process of dysplasia of the bone and soft tissue. The rapid weight gain and growth caused by overeating make the development of supporting soft tissue inconsistent, which leads to the abnormal development of hip joint. In dogs with congenital dysplasia of the hip, even if there is no symptom in young age, severe degenerative diseases will appear earlier in old age, and the joints of such dogs are generally subluxated. Severe subluxation of traction fiber capsule can cause pain and lameness in dogs about 10 months old. Because every step of the animal, the femoral head moves out of the acetabulum like a piston. For a long time, such movement and wear make the hip joint cocked up and too high, and also make the pressure on the joint contact surface increase and the joint surface wear. The trabecular fracture of acetabulum will occur, and the animals will have pain and lameness. The more common pathological changes of the hip joint in the elderly dogs are the hyperplasia of the fibrous tissue of the joint capsule and the thickening of the trabecula. These changes reduced the pain caused by capsule injury and trabecular fracture. Dogs have stronger pain tolerance than humans, so that dogs do not show obvious symptoms. But in the long run, the joint contact surface is still reduced, which leads to early wear of articular cartilage. Exposure of subchondral pain fibers. Cause lameness. Trabecular fracture and subchondral pain fiber exposure are the main causes of pain and lameness in dogs. In case of the above symptoms, the owner is unable to deal with such problems at home, so it is necessary to take them to the pet hospital for diagnosis and treatment in time, and at least 2 X-ray examinations are necessary. A complete X-ray examination can not only distinguish neurological problems from other orthopedic diseases (if there are other neurological problems, MRI or CT examination may also be needed, which is omitted here). The best examination method is to take a film under the state of deep sedation or anesthesia. Complete relaxation of muscles helps to determine the degree of joint relaxation. Due to the existence of certain anesthesia risks, it can only be carried out after full communication with the owner. I suggest to choose digital X-ray film to better analyze the reset angle and rake angle. This X-ray is a digital film. Through the green measuring line in the picture, it can be found that the area of the left femoral head and the right femoral head in the joint fossa is significantly different. However, because the dog was not sedated and anesthetized when taking this film, the positioning is not correct, which can not be used as the reason for diagnosis. Therefore, it is recommended to take the film when the dog’s muscles are relaxed.
3.The choice of treatment scheme. There are two kinds of treatment schemes for this kind of disease: conservative treatment and surgical treatment. In short, the early operation of young dogs can remove the cause of disease and improve the long-term treatment effect, but the late cooperation of the master operation largely determines the effect of the operation. For the old dogs with no effect of conservative treatment, when the owners want to maintain the long-term exercise ability of the sick dogs, they can consider surgical treatment. Conservative treatment: a survey shows that 75% of young dogs can also recover some exercise ability after conservative treatment. Considering the difficulty of economic and host cooperation, conservative treatment also has certain advantages. During the acute attack period, exercise should be limited for more than 10 days. Physical therapy combined with pain treatment for arthritis has a good effect. Generally, after 3 or 4 days, although the animal appears to be back to normal and wants to exercise, the owner must cooperate with the doctor for treatment, and continue to restrict exercise, and keep in captivity. Non hormone anti-inflammatory drugs are more optional. In addition, it is necessary to reduce weight for dogs. For example, swimming is a good choice with joint prescription food. In addition, other types of joint protectors can be selected according to the condition of the disease. The addition of calcium should be recommended by doctors. Generally, blood calcium and phosphorus should be measured before and after use for a period of time.
There are three kinds of operation schemes. One is pelvic incision. Three incisions are made at the edge of pubis, ischial endplate and the body of acetabulum. This operation can help the acetabulum to rotate axially and move laterally, so as to increase the contact area of the dorsal side of the femoral head. It is suitable for those dogs who need to recover exercise and relieve osteoarthritis, and the prognosis is good for the dogs with mild subluxation and mild or asymptomatic clinical symptoms. The hip joint of a 6-year-old farm dog is slightly misaligned, basically in the joint socket.
Total hip repair, which refers to replacing the degenerated hip joint with a false acetabulum cup and femur component, is commonly used in young adult dogs with ineffective conservative treatment. The success rate of the operation is very high, but it has a lot to do with the experience of the operating doctors. It belongs to a more complex surgical operation, which needs experienced and trained doctors to implement. The highlighted and smooth one is artificial femoral head, and the acetabulum is also smooth artificial cup Third: the removal of femoral head and neck refers to the removal of the friction part between the femur and acetabulum, so that the fibrotic pseudarthrosis can be formed. Because the pseudarthrosis is fibrotic, the instability of the pseudarthrosis leads to the disappearance of the clinical symptoms after the operation, which can not be predicted. However, many dogs with painful arthritis can be relieved by this operation, and the leg function can be restored. The prognosis of this operation method can not be judged, so it should be considered later. The dashed part in the figure is the dog’s femoral head and neck. Only when the dog’s femoral head and neck are completely removed as shown in the figure, can the specific treatment plan really reduce friction for each dog. Because considering the age of the animal, the severity of the disease, the body’s bearing capacity, the owner’s wishes and the economic situation, the appropriate plan can be selected. Either way, weight loss and exercise restriction can help the disease.
In addition, we remind you that in the feeding process of medium-sized dogs, especially those prone to obesity, don’t overindulge. Rapid weight gain makes the whole bone support difficult. For health products such as calcium powder, it should be used under the advice of doctors. Excessive intake of long-term calcium in the development period may cause imbalance of calcium and phosphorus ratio, calcification of soft tissue, and artificial Development abnormality. Early detection of problems, whether conservative treatment or surgical treatment, is better than inaction. If you are seriously paralyzed, you can only go to treatment, which will make you and your pet’s life very upset. 13-year-old dogs return to normal after 4 weeks of conservative treatment 13-year-old dogs return to normal after 4 weeks of conservative treatment.
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