Omental flap study explores lateral laparotomy in cats and dogs
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Omental flap study suggests a lateral laparotomy option in cats and dogs
A new cadaver study in Animals reports that veterinary surgeons could access and mobilize the greater omentum through a lateral approach laparotomy in both cats and dogs, potentially avoiding patient repositioning during some extra-abdominal procedures. The authors evaluated 22 cadavers, including 13 cats and 9 dogs, and found that dorsal extension of the greater omentum was achieved in all specimens without major structural damage. Further elongation with an inverted L-shaped pedicle flap was successful in 17 of 22 cadavers, with no significant difference between left- and right-sided approaches. The paper argues this could offer an alternative when animals are already positioned in lateral recumbency for thoracic or limb surgery. (mdpi.com)
Why it matters: For veterinary professionals, the practical value is workflow and risk reduction. Omental pedicle flaps are already used because the omentum brings vascular, lymphatic, and immunologic support to difficult wounds and surgical sites, but access is usually described through a ventral midline coeliotomy. In extra-abdominal cases, that can mean repositioning a patient that is already draped and prepared in lateral recumbency. Prior canine cadaver work showed that lengthened omental pedicle flaps can reach axillary and inguinal regions, while a recent review highlighted the omentum’s underused role in soft tissue surgery and orthopedics. This new study adds an anatomic proof-of-concept for getting to that tissue from the side instead of the midline. (mdpi.com)
What to watch: The next step is clinical, in vivo validation to see whether the lateral approach improves operative efficiency or outcomes, and whether flap viability and complication rates hold up outside the cadaver lab. (mdpi.com)
A newly published cadaver study suggests veterinary surgeons may be able to prepare an omental pedicle flap in cats and dogs through a lateral approach laparotomy, rather than relying only on a ventral midline abdominal approach. Published April 28, 2026, in Animals, the study tested whether the greater omentum could be accessed and mobilized while patients remained in left or right lateral recumbency, a position commonly used for extra-abdominal procedures involving the thorax or limbs. (mdpi.com)
That question matters because the omentum has become a useful adjunct in veterinary surgery, especially when clinicians want vascularized tissue to support healing, control dead space, or help manage contaminated or chronic wounds. The challenge is logistical as much as anatomical: many extra-abdominal surgeries are performed with the patient in lateral recumbency, while standard access to the omentum is typically through a ventral midline coeliotomy. Repositioning can add time, disrupt preparation, and, in some cases, increase contamination or handling risk. (mdpi.com)
In the new study, investigators examined 22 cadavers, including 13 cats and 9 dogs. They reported that dorsal extension of the greater omentum was possible in every specimen without major structural damage. When they added an inverted L-shaped pedicle flap technique to gain more reach, that was completed without rupture in 17 of 22 cadavers, or 77.3%. The authors also reported no significant difference between left- and right-sided lateral approaches, supporting the idea that either side may be workable depending on the primary procedure. Their conclusion was measured: lateral laparotomy appears to provide reliable access to the greater omentum and may be useful when repositioning is not feasible or carries added surgical risk. (mdpi.com)
The study builds on earlier work rather than appearing in a vacuum. A 2016 canine cadaver study in Veterinary Surgery found that a splenic artery-based omental pedicle flap could reach beyond the axillary and inguinal regions, and the authors called for clinical trials to evaluate the technique in vivo. Separately, a 2024 review in Animals described the omentum as underused in small animal surgery and summarized reports of its application in chronic wounds, thoracic defects, abscess management, and orthopedic reconstruction. (biblio.ugent.be)
That background is important because the clinical appeal of omental tissue is already familiar to many surgeons. The review notes that the omentum contributes macrophages, lymphocytes, mast cells, and rich vascular support, features that help explain why it has been used in contaminated fields and difficult-to-heal sites. Reported veterinary applications have included management of mediastinal abscesses, chronic axillary wounds in cats, and infected or slow-healing fractures in dogs, though much of that literature remains limited to case reports, small series, or cadaver models. (mdpi.com)
No outside expert commentary tied specifically to this April 2026 paper was readily available in the sources I found, but the broader literature points in a consistent direction: surgeons see the omentum as a versatile biologic tool, while also recognizing that technique, reach, and preservation of blood supply are the limiting factors. That makes this study less a practice-changing result than a technical data point that could widen options for reconstructive, thoracic, and orthopedic cases where lateral positioning is already part of the plan. (mdpi.com)
Why it matters: For veterinary professionals, the main takeaway is procedural flexibility. If a lateral approach can reliably provide access to the omentum, surgeons may be able to avoid repositioning some patients during extra-abdominal procedures, which could simplify draping, reduce handling, and potentially lower contamination risk. At the same time, this remains cadaver evidence. It does not yet answer the questions that matter most in live patients, including flap perfusion over time, postoperative pain, complication rates, ease of closure, and whether the approach improves healing or efficiency in real cases. (mdpi.com)
What to watch: Watch for in vivo case series or prospective clinical studies testing the lateral approach in thoracic, limb, wound reconstruction, or orthopedic patients, because that is where this technique will either move into practice or remain an anatomical proof-of-concept. (mdpi.com)