彩色多普勒超声对左肾静脉压迫综合征的诊断价值

目的：探讨彩色多普勒超声诊断左肾静脉压迫综合征的临床诊断价值。方法：应用彩色多普勒观察左肾静脉压迫综合征患者组（20例）和健康对照组（20例），分别测量左肾静脉近肾端最宽处内径a及其血流峰值速度Va，经过腹主动脉与肠系膜上动脉夹角所导致的狭窄处左肾静脉内径 b及其血流峰值速度Vb，通过简化伯努利方程计算左肾静脉与下腔静脉压力差（△P）。结果：患者组与对照组a/b（p＜0．05）、△P（p＜0．01）均有显著性差异。以△P≥3．5mmHg为临界值诊断左肾静脉压迫综合征准确性达97．7％。结论：彩色多普勒超声可作为诊断左肾静脉压迫综合征的首选方法，△P与a/b内径比联合应用可明显提高其诊断准确性。

Diagnosis value of left renal vein entrapment syndrome by Color doppler ultrasonography

Objective：To investigate the clinic value of color doppler ultrasound in the diagnosis of the left renal vein entrapment syn -drome.Methods：The left renal vein was measured on horizontal decubitus in 20 patients with left renal vein compression syndrome and 20 healthy cases selected randomly , The parameters included the left renal vein interior diameter （ b） and its flow velocity （ Vb） between su-perior mesenteric artery and abdominal aorta ,proximal interior diameter （ a） and its flow velocity （ Va ） of left renal vein ,The difference of pressure （△P） between left renal vein and inferior vena cava was calculated with simplified Bernoullis equation .Results：There was difference with a/b and△P between the patient group and the normal group .Compared to others methods ,taking 3.5 mmHg as the cut-off,△P had the highest accuracy （97.7%） in diagnosis of the left renal vein entrapment syndrome .Conclusion：Color doppler ultrasound is the best method for clinical diagnosis of the left renal vein entrapment syndrome .Compositive adhibition of a/b and △P may increase the accuracy in diagnosing of the left renal vein entrapment syndrome .