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Updated: Jul 15, 2026

Diagnosis of Hirschsprung's Disease by Immunostaining Rectal Suction Biopsies for Calretinin, S100 Protein and Protein Gene Product 9.5
Published on: April 26, 2019
Topical application of isosorbide dinitrate in patients with persistent constipation after pull-through surgery for
1Section of Pediatric Surgery, Department of Pediatrics, Obstetrics and Reproductive Medicine, University of Siena, Siena, Italy. messinam@unisi.it
Insights
Topical isosorbide dinitrate (ISDN) improved constipation in children post-Hirschsprung
Area of Science:
- Pediatric Surgery
- Gastroenterology
- Pharmacology
Background:
- Hirschsprung's disease (HD) is a congenital disorder requiring surgical correction, often followed by persistent constipation.
- Pull-through surgery for HD can lead to residual anal manometric abnormalities and clinical constipation.
- Current treatment options for post-surgical constipation in HD may be limited or invasive.
Observation:
- This study evaluated 3 pediatric patients with persistent constipation after Soave-Boley pull-through surgery for HD.
- Patients received topical isosorbide dinitrate (ISDN) paste (1 mg/kg twice daily) for three weeks.
- Anorectal manometry and clinical symptoms were assessed pre- and post-treatment, with follow-up at 1, 3, and 6 months.
Findings:
- Topical ISDN treatment resulted in significant improvement in constipation symptoms, with patients averaging 4 spontaneous evacuations weekly.
- Anorectal manometry showed a marked decrease in anal pressures: medium pressure reduced by 54.4% and maximum pressure by 38.7%.
- The high-pressure zone length decreased by 11.1%, indicating improved anal relaxation post-ISDN application.
Implications:
- Topical ISDN presents a potential non-invasive therapeutic alternative to anal myotomy for managing persistent constipation after HD surgery.
- The observed manometric improvements suggest ISDN effectively reduces anal sphincter tone in this patient population.
- Further research with larger cohorts and extended follow-up is warranted to confirm ISDN's long-term efficacy and safety.
Aims:
The aim of this study was to evaluate the anal manometric changes and the clinical effects after topical application of isosorbide dinitrate (ISDN) in patients with persistent constipation after pull-through surgery for Hirschsprung's disease (HD).
Methods:
We studied 3 children (2 males and 1 female), aged 2, 3 and 5 years respectively, who had undergone the Soave-Boley surgical procedure for HD and who suffered from persistent constipation after operation. We performed a pre- and postoperative anorectal manometry study and we applied ISDN paste (1 mg/kg two times daily) in the anal region for three weeks. All patients were followed-up and re-evaluated at 1, 3, and 6 months.
Results:
All patients showed an improvement of symptoms, with an average of 4 spontaneous evacuations per week. Prior to the topical treatment, the medium pressure was 115.6 mmHg (range 102 - 130 mmHg), the maximum pressure was 160 mmHg (range 145 - 175 mmHg), and the medium length of the high pressure zone was 1.8 cm (range 1.5 - 2.0 cm). At the 6 month follow-up, the medium pressure was 57.3 mmHg (range 52 - 61 mmHg, a decrease of 54.4 %), the maximum pressure was 98 mmHg (range 88 - 107 mmHg; a decrease of 38.7 %), and the medium length of the high pressure zone was 1.6 cm (range 1.4 - 1.8 cm; a decrease of 11.1 %).
Conclusions:
Topical treatment with ISDN is a valid therapeutic alternative to an anal myotomy in patients with persistent constipation after pull-through surgery for HD. However, a greater number of cases and a longer follow-up are necessary to confirm the validity of our experience.
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