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Related Experiment Video

Updated: May 2, 2026

The Helsinki Rat Microsurgical Sidewall Aneurysm Model
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"Tie over ring" sutureless compression based gastrointestinal anastomotic method: experimental rat model.

Mehran Hiradfar1, Reza Shojaeian1, Nona Zabolinejad1

  • 1Endoscopic & Minimally Invasive Surgery Research Center, Ghaem Hospital, Faculty of Medicine, Mashhad University of Medical Sciences, Mashad, Iran.

Journal of Pediatric Surgery
|March 22, 2014
PubMed
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A novel sutureless intestinal anastomosis technique using a tie-over ring proved faster and safer than traditional handsewn methods in rats. This method offers a promising alternative for bowel reconstruction, reducing complications and improving tensile strength.

Area of Science:

  • Surgical Innovation
  • Gastrointestinal Surgery
  • Experimental Animal Models

Background:

  • Pediatric minimally invasive surgery and neonatal interventions are increasing.
  • Intestinal anastomosis presents anatomical and technical challenges, demanding faster, safer methods.
  • Sutureless techniques, like compression-based anastomosis with rings or magnets, are emerging.

Purpose of the Study:

  • To evaluate a novel, simple, sutureless intestinal anastomosis technique using an intraluminal ring.
  • To compare this technique against conventional handsewn bowel anastomosis in an animal model.

Main Methods:

  • Thirty Wistar-Albino male rats underwent small bowel transection.
  • Group 1: Sutureless anastomosis using a grooved plastic ring and simple tie.
Keywords:
AnastomosisBowelMinimally invasive surgeryPediatricsSutureless

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  • Group 2: Conventional handsewn anastomosis. Outcomes assessed after 14 days for leakage, adhesions, abscesses, integrity, tensile strength, and histology.

    • Main Results:

    • The tie-over ring group showed significantly reduced operative time and intraoperative bleeding.
    • Conventional anastomosis had more strictures, while the tie-over ring group exhibited higher anastomotic tensile strength.
    • Histopathological healing was similar, but handsewn anastomosis had higher inflammatory cell infiltration.

    Conclusions:

    • The "tie over ring" method is a feasible, rapid, safe, and effective sutureless technique for bowel reconstruction.
    • This technique demonstrated superior functional outcomes in an animal model.
    • The tie-over ring method warrants consideration for human bowel anastomosis.