Diagnostic value of short axis tracking scanning in perianal ultrasonography of anal fistula

CHEN Mei; REN Xiuyun; HE Xining; ZHAO Yuanyuan; WU Shengzheng

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Medical Journal of the Chinese People Armed Police Forces ›› 2022, Vol. 33 ›› Issue (9) : 778-782.

Diagnostic value of short axis tracking scanning in perianal ultrasonography of anal fistula

CHEN Mei¹, REN Xiuyun¹, HE Xining², ZHAO Yuanyuan¹, WU Shengzheng^1,2

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Abstract

Objective To explore the diagnostic value of short axis tracking scanning in perianal ultrasonography for anal fistula.Methods The data of 617 patients with anal fistula who underwent perianal ultrasound examination in Hainan Hospital of Chinese PLA General Hospital were retrospectively analyzed. The diagnostic accuracy of long-axis and short-axis tracking scanning on the internal opening, primary fistula and branch fistula of anal fistula were compared among the patients who completed long-axis and short-axis tracking scanning.Results A total of 75 patients were enrolled, including 33 cases with conventional ultrasonography (CUS) combined with contrast-enhanced ultrasonography (CEUS). In CUS, the diagnostic accuracy of short-axis tracking was higher than that of long-axis tracking, with statistically significant difference (77.33% vs 34.67%, P<0.05). In the diagnostic accuracy of primary fistula and secondary fistula, there was no significant difference between long axis and short axis scanning (primary fistula 86.67% vs 85.33%; branch fistula 44.12% vs 38.24%). In CUS combined with CEUS, the diagnostic accuracy of the internal opening through short axis scanning was higher than that of long axis scanning, with statistically significant difference (90.91% vs 66.67%, P<0.05). In the diagnostic accuracy of primary fistula and branch fistula, there was no significant difference between long axis and short axis scanning (primary fistula 87.88% vs 93.94%; branch fistula 71.43% vs 66.67%).Conclusions Short axis tracking scanning is helpful to improve the accuracy of ultrasonic diagnosis of anal fistula.

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ultrasonography / anal fistula / diagnosis / contrast-enhanced ultrasound

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CHEN Mei, REN Xiuyun, HE Xining, ZHAO Yuanyuan, WU Shengzheng. Diagnostic value of short axis tracking scanning in perianal ultrasonography of anal fistula[J]. Medical Journal of the Chinese People Armed Police Forces. 2022, 33(9): 778-782

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