活动性强直性骶髂关节炎的彩色多普勒超声表现

目的 探讨活动性强直性骶髂关节炎的彩色多普勒超声表现.方法 使用彩色多普勒超声检查33例经MRI确诊为活动性强直性骶髂关节炎患者的66个骶髂关节和28例健康对照者的56个骶髂关节,了解骶髂关节内部和周边血流信号的显示情况,并对血流信号的丰富程度进行半定量分级,同时测量动脉血流阻力指数,分析两组间血流显示率、血流级别分布、血流的丰富程度和动脉血流阻力指数的差异.结果 病例组骶髂关节内部或周边血流显示率(60/66,90.1%)高于健康对照组(25/56,44.6%),两组间差异具有显著统计学意义(P=0.000);病例组以2～3级多血流为主,而健康对照组以0～1级少血流为主,两组间血流级别分布及血流丰富程度差异均具有显著统计学意义(均P=0.000);病例组的平均动脉血流阻力指数(0.57±0.07)低于健康对照组(0.66±0.04),两组间差异亦具有显著统计学意义(P=0.000).结论 活动性强直性骶髂关节炎患者骶髂关节内部或周边以丰富偏低阻力血流为主,彩色多普勒超声有助于评价强直性骶髂关节炎的炎性活动度.

Color Doppler ultrasonographic findings in active ankylosing sacroiliitis

Objective To evaluate the color Doppler ultrasonographic findings of active ankylosing sacroiliitis.Methods Thirty three patients (66 sacroiliac joints in total) with active ankylosing sacroiliitis identified by MRI and twenty eight healthy volunteers (56 sacroiliac joints) underwent color Doppler ultrasound examinations of sacroiliac joints.Degree of blood flow within and around the sacroiliac joints was evaluated by semi-quantitative scale (0 - 4 grade).For arteries, resistive index was also measured.Statistical analyses were performed to compare blood flow demonstration rate, blood flow signal scale distribution,degree of blow flow and RI value between the two groups.Results Higher blood flow demonstration rate was found in patients with active ankylosing sacroiliitis(60/66,90.1%) than control group (25/56,44.6%)( P = 0.000).The scale distribution and degree of blow flow between these two groups were statistically different (all P = 0.000) ,with mainly 2～3 grade for the patients and 0～1 grade for the control.Mean value of RI in the patients was 0.57 ± 0.07, which was lower than the control (0.66 ± 0.04, P = 0.000).Conclusions Patients with active ankylosing sacroiliitis tend to have higher degree of blood flow in sacroiliac joints and lower RI values of artery.Color Doppler ultrasound may help to evaluate the activity of ankylosing sacroiliitis.