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Chinese Journal of Digestion and Medical Imageology(Electronic Edition) ›› 2022, Vol. 12 ›› Issue (06): 334-341. doi: 10.3877/cma.j.issn.2095-2015.2022.06.003

• Original Article • Previous Articles     Next Articles

Evaluation of functional anorectal disorder by transperineal and three-dimensional endoanal ultrasound

Yahong Xue1, Fei Liu1, Yan Ling1, Xiaofeng Wang1,()   

  1. 1. Anorectal Department, Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese Medicine, Nanjing 210022, China
  • Received:2022-02-10 Online:2022-12-01 Published:2023-01-11
  • Contact: Xiaofeng Wang

Abstract:

Objective

To evaluate the diagnostic value of transperineal ultrasound(TPUS)and three-dimensional endoanal ultrasound(3D-EAUS)for functional anorectal disorder(FAD).

Methods

A total of 138 patients with FAD admitted to the Anorectal Department of Nanjing Hospital of Traditional Chinese Medicine from January 2019 to March 2021 were retrospectively analyzed, including 96 cases of functional defecation disorder(FDD), 14 cases of fecal incontinence(FI)and 28 cases of functional anorectal pain(FARP). Bladder neck descent(BND), retrovesical angle(RVA), anorectal angle(ARA), rectocele(RC)were measured by TPUS.Assessment of sphincter integrity and measurement of puborectalis angle were taken using 3D-EAUS.

Results

TPUS: In 80 female patients with FDD, 10(12.5%)patients had BND>25 mm at the maximum Valsalva, 23(28.75%)patients had RVA>140°, 45(56.25%)patients had RC, 43(53.75%)patients had rectal intussusception(RI)and 1(1.25%)patient had enterocele.Among 22 female patients with FARP, 2(9.1%)patients had BND>25 mm at the maximum Valsalva, 4(18.2%)patients had RVA>140°, 11(50%)patients had RC and 13(59.1%)patients had RI.No significant differences were observed in ARA between the resting state and the maximum Valsalva in female patients with FDD and FARP(P>0.05).3D-EAUS: There was a significant difference in the puborectalis angle between the resting state and the maximum Valsalva in 16 male patients with FDD [(88.84±3.80)°vs.(87.54±3.47)°, P<0.05]. In 14 cases of FI, 5 cases had severe sphincter defect(score: 10 to13 points), involving the internal and external sphincter, all of which were perineal laceration caused by birth injury, 1 case of moderate defect(score: 6 points), and 3 cases of mild defect(score: 3 to 4 points). In 41 female patients with FDD, both the ARA and puborectalis angle at the maximum Valsalva were significantly smaller than those at the resting state(P<0.01).

Conclusion

The TPUS and 3D-EAUS can accurately assess the morphological features of the pelvic floor in FAD patients, and detect other accompanying pelvic floor disorders.The assessment is integral.

Key words: Anorectal disorder, Functional defecation disorder, Fecal incontinence, Functional anorectal pain, Transperineal ultrasound, Three-dimensional endoanal ultrasound

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