Felt-Bersma R J F
Department of Gastroenterology and Hepatology, VU University Medical Centre, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands.
Dig Liver Dis. 2006 Aug;38(8):537-43. doi: 10.1016/j.dld.2006.02.016. Epub 2006 Apr 14.
Anal ultrasound has demonstrated to be accurate in staging perianal cryptoglandular fistulae and fistulae in Crohn's disease. When there is an external fistula opening, H2O2 can be introduced with a plastic infusion catheter. The tract becomes then visible as a hyperechoic lesion ('white'). It has been shown that this corresponds excellent with surgical findings. It is equally sensitive as endoanal MRI. Because recurrent cryptoglandular fistulae are complex in about 50% and Crohn's fistula in 75%, it is mandatory to perform anal ultrasound preoperative in these patients to avoid missed tracks during surgery and subsequent recurrences. Anal ultrasound can also be used to monitor (medical) therapy in patients with Crohn's disease. Especially considering the easiness of performing and lesser costs then MRI, endoanal ultrasound merits more attention.
经肛门超声已被证明在肛周隐窝腺性瘘管和克罗恩病瘘管的分期中是准确的。当存在外瘘口时，可通过塑料输液导管注入过氧化氢。然后，瘘管可显示为高回声病变（“白色”）。研究表明，这与手术结果高度吻合。它与肛管内磁共振成像（endoanal MRI）一样敏感。由于约50%的复发性隐窝腺性瘘管和75%的克罗恩病瘘管情况复杂，因此对这些患者进行术前经肛门超声检查很有必要，以避免手术中遗漏瘘管路径及随后的复发。经肛门超声还可用于监测克罗恩病患者的（药物）治疗。特别是考虑到其操作简便且成本低于MRI，肛管内超声应得到更多关注。
