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为评价彩色多谱勒超声对小儿胡桃夹现象的诊断价值 ,将随机选择的20例小儿按左肾静脉 (LRV)内径与腹主动脉和肠系膜上动脉间LRV前后径比值 (a/b)≥3和<3分为对照组A组与B组 ;与8例临床诊断胡桃夹现象的小儿进行二维及彩色多谱勒超声对比研究 ,并按简化柏努力方程计算LRV与下腔静脉的压力差 ( p) ;部分病例组患儿直立试验后重复以上检查。结果显示 ,病例组b段多谱勒测值流速(144.13±38.6)cm/s,a段流速(8.68±4.22)cm/s,与对照组比较差异明显 ,对照组A组和B组之间比较差异无显著性 ;病例组 p :(8.79±4.94)mmHg ,对照组 p<3mmHg。提示彩色多谱勒超声在诊断小儿胡桃夹现象中具有重要的应用价值 , p>3mmHg可作为小儿胡桃夹现象的一个诊断条件
To evaluate the value of color Doppler ultrasonography in the diagnosis of pediatric nutcracker, 20 randomized children were selected according to the ratio of the diameter of the left renal vein (LRV) to the ratio of the anterior and posterior LRV (a / b) between the abdominal aorta and the superior mesenteric artery 3 and <3 were divided into control group A and group B; and 8 cases of clinical diagnosis of Nutcracker in children with two-dimensional and color Doppler ultrasound contrast study, and according to the simplified Bernoulli equation LRV and the pressure of the inferior vena cava Poor (p); some cases of children after the upright test repeat the above test. The results showed that the measured value of Doppler in case b was (144.13 ± 38.6) cm / s and that in a was 8.68 ± 4.22 cm / s, which was significantly different from that in control group The difference was not significant; the case group p: (8.79 ± 4.94) mmHg, the control group p <3mmHg. Tip color Doppler ultrasound in the diagnosis of pediatric nutcracker phenomenon has an important application value, p> 3mmHg can be used as a diagnosis of pediatric nutcracker phenomenon