Reinforced tissue matrix to strengthen the abdominal wall following reversal of temporary ostomies or to treat incisional hernias

Spencer P Lake; Corey R Deeken; Amit K Agarwal

doi:10.4240/wjgs.v16.i3.823

Reinforced tissue matrix to strengthen the abdominal wall following reversal of temporary ostomies or to treat incisional hernias

World J Gastrointest Surg. 2024 Mar 27;16(3):823-832. doi: 10.4240/wjgs.v16.i3.823.

Authors

Spencer P Lake¹, Corey R Deeken², Amit K Agarwal³

Affiliations

¹ Mechanical Engineering & Materials Science, Washington University in St. Louis, St. Louis, MO 63130, United States.
² Covalent Bio, LLC, St. Louis, MO 63025, United States.
³ Department of Surgery, McGovern Medical School at UTHealth, Houston, TX 77026, United States. amit.k.agarwal@uth.tmc.edu.

Abstract

Background: Abdominal wall deficiencies or weakness are a common complication of temporary ostomies, and incisional hernias frequently develop after colostomy or ileostomy takedown. The use of synthetic meshes to reinforce the abdominal wall has reduced hernia occurrence. Biologic meshes have also been used to enhance healing, particularly in contaminated conditions. Reinforced tissue matrices (RTMs), which include a biologic scaffold of native extracellular matrix and a synthetic component for added strength/durability, are designed to take advantage of aspects of both synthetic and biologic materials. To date, RTMs have not been reported to reinforce the abdominal wall following stoma reversal.

Aim: To evaluate the effectiveness of using an RTM to reinforce the abdominal wall at stoma takedown sites.

Methods: Twenty-eight patients were selected with a parastomal and/or incisional hernia who had received a temporary ileostomy or colostomy for fecal diversion after rectal cancer treatment or trauma. Following hernia repair and proximal stoma closure, RTM (OviTex^® 1S permanent or OviTex^® LPR) was placed to reinforce the abdominal wall using a laparoscopic, robotic, or open surgical approach. Post-operative follow-up was performed at 1 month and 1 year. Hernia recurrence was determined by physical examination and, when necessary, via computed tomography scan. Secondary endpoints included length of hospital stay, time to return to work, and hospital readmissions. Evaluated complications of the wound/repair site included presence of surgical site infection, seroma, hematoma, wound dehiscence, or fistula formation.

Results: The observational study cohort included 16 male and 12 female patients with average age of 58.5 years ± 16.3 years and average body mass index of 26.2 kg/m² ± 4.1 kg/m². Patients presented with a parastomal hernia (75.0%), incisional hernia (14.3%), or combined parastomal/incisional hernia (10.7%). Using a laparoscopic (53.6%), robotic (35.7%), or open (10.7%) technique, RTMs (OviTex^® LPR: 82.1%, OviTex^® 1S: 17.9%) were placed using sublay (82.1%) or intraperitoneal onlay (IPOM; 17.9%) mesh positioning. At 1-month and 1-year follow-ups, there were no hernia recurrences (0%). Average hospital stays were 2.1 d ± 1.2 d and return to work occurred at 8.3 post-operative days ± 3.0 post-operative days. Three patients (10.7%) were readmitted before the 1-month follow up due to mesh infection and/or gastrointestinal issues. Fistula and mesh infection were observed in two patients each (7.1%), leading to partial mesh removal in one patient (3.6%). There were no complications between 1 month and 1 year (0%).

Conclusion: RTMs were used successfully to treat parastomal and incisional hernias at ileostomy reversal, with no hernia recurrences and favorable outcomes after 1-month and 1-year.

Keywords: Abdominal wall; Colostomy; Ileostomy; Incisional hernia; Ostomy takedown; Reinforced forestomach matrix; Reinforced tissue matrix.