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目的探讨高频超声检查在低位肛瘘术前诊断中的临床应用价值。方法对照手术结果回顾性分析79例低位肛瘘患者的术前高频超声检查的声图像资料。结果高频超声诊断对低位单纯性肛瘘的瘘管及瘘口诊断的符合率为100%，对低位复杂性肛瘘的瘘管及瘘口诊断的符合率为83.3%。结论高频超声能够观察低位肛瘘的瘘管走行及分支、瘘口的位置，为外科治疗提供较为准确、可靠的信息。“,”Objective To discuss the clinical application value of high frequency ultrasound in diagnosis of low anal fistula.Methods Acoustic image data of 79 cases of anal fistula in patients with preoperative high-frequency ultrasound contrast analysis of surgical results.Results High frequency ultrasound diagnosis of low simple anal fistula and fistula mouth diagnosis coincidence rate was 100%,and of low complexity anal fistula fistula and fistula diagnosis accord with rate of 83.3%.Conclusion High frequency ultrasound can observe low anal fistula fistula walk and branches,fistula location,to provide more accurate and reliable information for the surgical treatment.