由 doggydc » 2005-01-04, 11:37
The main factor to induce CHD is the joint laxity. We use the Norberg angle and femoral head coverage to determine the condition of laxity.
According to the research and database of all the breed of dogs we find out when the Norberg angle larger than 105 and the femoral head coverage over 50% present ther is no visible joint laxity from x-ray. If the Norberg angle is smaller than 105, we will start to see the signs of joint laxity. There is no definitely number to tell you what range presents mild, moderate or severe CHD. According to my own experience, I can say when the angle between 95 to 104 is mild, 85 to 95 is moderate and under 85 is severe. Each orthopedic surgeon has his own judgement but won't have big difference.
Dr. Lee from Elwood animal medical group, U.S.A.
譯文如下:
引起CHD的主因是關節鬆弛。我們以Norbert angle(角度)與femoral head coverage(股骨頭包覆度) 作為鬆弛度的判斷依據。根據針對所有品種狗狗的研究與資料庫顯示,當Norberg angle 大於 105 且 femoral head coverage 超過 50%時,表示從X光看不到關節鬆弛的現象。如果Norberg angle 小於 105,會開始看到關節鬆弛的徵兆。關於CHD是溫和、中度或嚴重,並無明確定義。據我的經驗,我認為角度在95到104間的是溫和,85到95是中度,小於85是嚴重。每個外科醫生都有自己的判斷標準,但差異不大。
美國愛屋醫療團隊 李學文醫師