To evaluate a continuous balloon distension on the treatment of anorectal stenosis,the study was carried out on 13 patients with anorectal stenosis.There were two congenital anal stenosis,five anal stenosis after anoplasty,one congenital rectal stenosis,four rectal stenosis from rectal operation or trauma and one congenital anorectal stenosis.The lengths of the stenotic segment varied from 0.6 to 1.0 cm in four cases and 1:2 to 5.0 cm in nine cases.Eight patients failed in bougie anal dilatation.In this aeries,the dilatation was performed by a distended ballon,which was inserted into and fixed in the stenotic segment.By injecting water into the ballon at 1ml increament,the resting pressure on the stenotic segment(RPSS)was measured.Then the balloon was continuously distended at the pressure of mid-accelerating phase of the RPSS for 20 hours every day until the patient was able to pass stool without difficulty,and the stenotic segment disappeared in digital examination and balloonogram.Twelve of the 13 patients were successful in 5 to 15 days(average 6.7 days)and remained a normal defecation pattern in 6 to 18 months'follow-up.The continuous balloon distension for anorectal stenosis is a preferable therapeutics,It is especially effective for cases failed by bougie anal dilatation.%利用张力-应力原理,采用球囊持续扩张方法,治疗肛门直肠狭窄患儿13例,其中先天性肛门狭窄2例,肛门成形术后肛门狭窄5例,先天性直肠狭窄1例,术后或外伤性直肠狭窄4例,先天性肛门直肠狭窄1例.狭窄段长度0.6～1.0 cm4例,1.2～5.0 cm9例.8例曾经扩肛器扩肛失败.持续球囊扩肛每天20小时,扩张压力在狭窄部静息压力曲线的迅速上升期范围.13例中12例成功,即排便通畅,肛检及球囊造影示狭窄段消失.所需时间5～15天,平均6.7天.1例无效.随访6～18个月无复发者.球囊持续扩张为治疗小儿肛门直肠狭窄的可靠方法,特别适用于狭窄段长和常规扩肛器扩张治疗失败的患儿.
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