For the treatment of anal fissure

Sohn’s Dilators® are designed to perform Standardized Anal Dilatation. Standardized Anal Dilatation is a highly successful treatment for anal fissure, with lower rates of impaired continence compared to lateral internal sphincterotomy. Success rates for anal dilatation to 40 mm for six minutes are 83% to 88%.3,7Standardized Anal Dilatation avoids other complications of sphincterotomy: bleeding, abscess, fistula and chronic pain. Sohn’s Dilators® are also useful for gentle anal dilatation during all anorectal surgeries. Three dilators comprise a set; 30, 35 and 40 mm diameters. They are autoclavable, lightweight and durable.

  • Catalog No. SOD-03
  • 1 set of 3 dilators per box
  1. Sohn N, Eisenberg MM, Weinstein MA, Lugo RN, Adler J. Precise anorectal sphincter dilatation: its role in the therapy of anal fissures. Dis Colon Rectum 1992;35:322-7
  2. Perez-Miranda M, Robledo P, Alcalde M, Gomez-Cedenilla A, Mate Jimenez J. Endoscopic anal dilatation for fissure-in-ano: a new outpatient treatment modality. Rev Esp Enferm Dig 1996 Apr;88(4):265-72
  3. Sohn N, Weinstein MA. Seminars in Colon & Rectal Surgery 1997 March; 8(1):17-23
  4. Walfisch S, Silberstein E. Balloon anal dilatation for anal fissure. Tech Coloproctol 1998;2:73-75
  5. Boschetto S, Giovannone M, Tosoni M, Barberani F. Hydropneumatic anal dilation in conservative treatment of chronic anal fissure: clinical outcomes and randomized comparison with topical nitroglycerin. Tech Coloproctol 2004 August;8(2):89-92
  6. Renzi A, Brusciano L, Pescatori M, Izzo D, Napolitano V, Rossetti G, del Genio G, del Genio A. Pneumatic balloon dilatation for chronic anal fissure: a prospective, clinical, endosonographic, and manometric study. Dis Colon Rectum 2005 Jan;48(1):121-6
  7. Renzi A, Izzo D, Di Sarno G, Talento P, Torelli F, Izzo G, Di Martino N. Clinical, manometric, and ultrasonographic results of pneumatic balloon dilatation vs. lateral internal sphincterotomy for chronic anal fissure: a prospective, randomized, controlled trial. Dis Colon Rectum 2008 Jan;51:121-7  
  8. Yucel T, Gonullu D, Oncu M, Koksoy FN, Ozkan SG, Aycan O. Comparison of controlled-intermittent anal dilatation and lateral internal sphincterotomy in the treatment of chronic anal fissures: a prospective, randomized study. Int J Surg 2009 Jun;7(3):228-31
  9. Santander C, Gisbert JP, Moreno-Otero R, McNicholl AG, Maté J. Usefulness of manometry to select patients with anal fissure for controlled anal dilatation. Rev Esp Enferm Dig 2010;102(12):691-7
  10. Cariati A. Anal stretch plus fissurectomy for chronic anal fissure. Acta Chir Belg. 2013;113:322-324
  11. Cariati A, Piromalli E, Copello F, Torelli I. Anal stretch for chronic anal fissure: an old operation that stood the test of time. Langenbecks Arch Surg 2019;404(Suppl 1):S9–S10
  12. Pinsk I, Czeiger D, Lichtman D, Reshef A. The long-term effect of Standardized Anal Dilatation for chronic anal fissure on anal continence. Ann Coloproctol 2021;37(2):115-119


Sohn’s Dilators® is a registered trademark of Tools for Surgery, LLC

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