目的 观察4排螺旋CTA评价犬股骨头血运的价值.方法 对18只犬双侧髋关节行4排螺旋CTA和DSA检查,观察股骨头血供与血液循环(FHCP)显示情况,与DSA对照评价CTA显示旋股内、外侧动脉(MCFA、LCFA)、支持带动脉(RA)、头凹动脉(LTA)的敏感度和特异度.结果 犬股骨头血供主要来自MCFA、LCFA,尤其前者发出的RA.CTA准确显示了所有髂总动脉、髂内动脉、髂外动脉、股动脉、股深动脉、骶正中动脉及其分支,显示MCFA、LCFA、RA的敏感度分别为94.44％ (34/36)、88.89％(32/6)、3.03％ (5/165),特异度均为100％.CTA未能显示LTA和FHCP,其评价RA、LTA和FHCP的能力明显低于DSA(P＜0.001).结论 4排螺旋CTA评价犬股骨头血运的价值非常有限.%Objective To investigate the value of CTA on blood supply of femur head in dog. Methods CTA and DSA of bilateral hips were performed in 18 dogs. CTA was obtained after single-bolus injection of contrast media from the peripheral vein using 4-slice spiral CT. The blood supply of femur head and femur head cyclic process (FHCP) were observed. The sensitivity and the specificity of the medial and lateral circumflex femoral artery (MCFA and LCFA), the retinaculum artery (RA) and the artery of the ligamentum teres femoris (LTA) of CTA were compared with those of DSA. Results Blood supply to the femoral head was mainly from MCFA and LCFA, especially from RA originated from MCFA in dogs. CTA accurately displayed the common iliac arteries, internal and external iliac arteries, femoral arteries, deep femoral arteries, median sacral arteries and their 3 bifurcations. The sensitivity of CTA for MCFA, LCFA and RA was 94. 44% (34/ 36), 88.89% (32/36) and 3.03% (5/165), respectively; and the specificities were all 100%. LTA and FHCP were not shown by CTA. The assessment ability of CTA for RA, LTA and FHCP was significant lower than DSA (P<0. 001). Conclusion The value of 4-slice spiral CTA in evaluation on blood supply of dog's femoral head is very limited.
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