The study compared two established laparoscopic approaches: intraperitoneal onlay mesh repair, known as IPOM, and the ventral transabdominal preperitoneal repair, or V-TAPP. IPOM has dominated minimally invasive ventral hernia surgery since its introduction roughly three decades ago, largely because it is fast and technically straightforward. The surgeon places a coated mesh directly inside the abdominal cavity, bridging the hernia defect from within, and anchors it to the abdominal wall with sutures and tacks. V-TAPP, by contrast, takes a different route: the surgeon opens the peritoneum, dissects a flap of this membrane away from the abdominal wall, and slides an uncoated mesh into the preperitoneal space between the peritoneum and the muscle layers, where it is shielded from the abdominal organs.

That anatomical distinction is the crux of the argument. In IPOM, the mesh sits in direct contact with the intestines and other viscera, which raises concerns about postoperative adhesions, the scar-like bands that can form between organs and foreign surfaces. Coated composite meshes have been developed to reduce this risk, but they add considerable cost and do not eliminate adhesion formation entirely. Fixation is another sore point, literally. Tacks and transfascial sutures bite into the sensitive peritoneal lining and abdominal wall, and this anchoring has been directly linked to postoperative pain. V-TAPP sidesteps both problems: the mesh rests in a natural plane away from the organs, requires only minimal fixation, and can be a plain, inexpensive polypropylene mesh rather than a costly coated product.

To test whether these theoretical advantages translate into measurable clinical benefit, the research team reviewed 70 adult patients who underwent elective laparoscopic repair of primary umbilical hernias at their institution between January 2019 and February 2026. Forty patients received V-TAPP and thirty received IPOM. The two groups were well matched in age, sex distribution, body mass index, anesthetic risk classification, hernia size, and comorbidities such as diabetes, smoking, and chronic lung disease, which strengthens the comparison despite its retrospective design. The V-TAPP technique was introduced at the center in October 2023 and subsequently adopted as the standard approach for small and medium umbilical hernias, and all operating surgeons had completed their learning curve for the cases analyzed.

The surgical technique behind V-TAPP deserves attention because it explains both the promise and the price of the procedure. After establishing the pneumoperitoneum, the team insufflates carbon dioxide at Palmer’s point in a way that opens the extraperitoneal space, a maneuver called pneumodissection that gently separates tissue planes and makes the subsequent dissection easier. The peritoneum is then incised roughly six centimeters lateral to the hernia and extended parallel to the midline over about fifteen centimeters. The most delicate step involves developing this preperitoneal plane toward the midline while avoiding tears in the peritoneum, then circumferentially freeing the hernia sac from its ring, a landmark the authors describe as the volcano sign. Once the sac is reduced and the peritoneal flap is mirrored to the opposite side, the fascial defect is closed with suture and a macroporous polypropylene mesh is laid into the preperitoneal pocket, secured with just two transfascial sutures before the peritoneal incision is closed.

The results were striking on several fronts. Operative time favored IPOM, as expected: V-TAPP cases averaged 98.1 minutes compared with 68.4 minutes for IPOM, a difference of roughly half an hour that was highly statistically significant. But the recovery metrics told a different story. Twenty-four hours after surgery, V-TAPP patients reported an average pain score of 3 on the ten-point visual analogue scale, while IPOM patients averaged 4.8. Hospital stay averaged 1.3 days after V-TAPP versus 4.8 days after IPOM. Crucially, when the researchers ran multivariable regression adjusting for age, body mass index, anesthetic class, sex, and hernia size, the choice of IPOM remained an independent predictor of both longer hospitalization and higher postoperative pain, indicating that the differences were not explained by patient characteristics.

Safety outcomes were reassuringly similar between the groups. Overall postoperative morbidity was low and comparable, affecting three V-TAPP patients and two IPOM patients. One patient in each group required a return to the operating room. There were no mesh infections in either cohort, and no conversions to open surgery, although one V-TAPP case had to be converted to IPOM after the surgeons failed to raise an adequate peritoneal flap. A single intraoperative bleeding event occurred in the IPOM group when an absorbable tack injured an inferior epigastric artery, and it was controlled with hemostatic stitches. Seroma formation at thirty days was slightly more common in the V-TAPP group, two asymptomatic cases versus none, but the difference did not reach statistical significance.

Long-term follow-up showed no clear winner on durability. With median follow-up of about thirteen months in the V-TAPP group and fourteen and a half months in the IPOM group, recurrence was rare in both: none among the twenty-six V-TAPP patients followed and one case among twenty-six IPOM patients. Chronic pain lasting more than three months appeared in a single IPOM patient and in no V-TAPP patients. The authors attribute the low recurrence rates in both groups to the fact that the fascial defect was closed with sutures in every case, a step widely recognized as critical for durable repair regardless of mesh position.

The findings fit into a broader movement in abdominal wall surgery away from intraperitoneal mesh placement. Prior research has documented adhesions in roughly half of patients undergoing reoperation after IPOM, and a growing arsenal of extraperitoneal techniques, including extended total extraperitoneal repair and transabdominal retromuscular approaches, has emerged. The authors argue that many of these advanced methods involve extensive retrorectus dissection or component separation that may be disproportionate for small defects. V-TAPP, in their view, offers a middle path: operative trauma scaled to the size of the hernia, without the need for complex dissection or specialized materials, making it an accessible option for the large population of patients with small and medium primary umbilical hernias.

The study carries important limitations that temper the enthusiasm. It was retrospective and non-randomized, the two cohorts were not contemporaneous, the sample sizes were modest, and the length of hospital stay partly reflects German reimbursement practices and the national tendency to admit hernia patients. No formal cost analysis was performed to quantify the potential economic advantage of avoiding coated meshes. The authors themselves call for larger prospective randomized trials with standardized protocols and long-term follow-up before V-TAPP can be declared the preferred approach. Still, the message resonates beyond this single center: for a common, relatively small hernia, the most technically elaborate solution is not always the kindest one, and matching the invasiveness of the operation to the size of the problem may be the surest way to get patients home faster and in less pain.

Subject of Research: Comparison of laparoscopic ventral TAPP and IPOM techniques for primary umbilical hernia repair

Article Title: Laparoscopic ventral TAPP versus IPOM for primary umbilical hernia repair: why use a sledgehammer to crack a nut?

Article References: Prassas, D., Kreym, O., Knoefel, W. T., & Vaghiri, S. (2026). Laparoscopic ventral TAPP versus IPOM for primary umbilical hernia repair: why use a sledgehammer to crack a nut?. Journal of Abdominal Wall Surgery, 5, Article 16805. https://doi.org/10.3389/jaws.2026.16805

Image Credits: AI Generated

DOI: 10.3389/jaws.2026.16805

Keywords: umbilical hernia, laparoscopic surgery, V-TAPP, IPOM, mesh placement, preperitoneal space, postoperative pain, hospital length of stay, hernia recurrence, abdominal wall surgery, retrospective cohort study, surgical technique