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  • Title: Assessment of sphincter muscle function before and after posterior sagittal anorectoplasty using a magnetic spinal stimulation technique.
    Author: Kubota M, Suita S.
    Journal: J Pediatr Surg; 2002 Apr; 37(4):617-22. PubMed ID: 11912522.
    Abstract:
    PURPOSE: The authors used a magnetic spinal stimulation technique to assess both the preoperative sphincter function and the effect of operative intervention on the sphincter muscle in patients with anorectal malformations. METHODS: The authors examined 5 patients with an anorectal malformation consisting of 4 high-type cases and 1 intermediate-type case, that all had undergone posterior sagittal anorectoplasty during the previous 2-year period. Control data also were obtained from 11 age-matched healthy children. A contraction of the external anal sphincter (EAS) was evoked by magnetic stimulation of the sacral roots with a figure-of-eight coil at the level of the lumber and sacral segments. EAS electromyograms then were recorded at the anal verge. RESULTS: The preoperative motor latencies at L4 stimulation increased significantly more in the patients than in the controls (5.9 +/- 0.5 msec v 4.1 +/- 0.7 msec during left side recording). In the postoperative examination (1 to 5 months after operation), the mean maximum amplitude decreased slightly without any significant difference, where as the latency was almost identical to the preoperative data. CONCLUSION: These results suggest that the neurologic function of EAS was congenitally disturbed, and the current operative technique had no significant effect on the sphincter function.
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