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Obstructed incisional ventral hernia — Clinical Guidelines

Overview

Obstructed incisional ventral hernias occur when the integrity of the abdominal wall is compromised following previous surgical incisions, leading to protrusion of intra-abdominal contents through the weakened tissue. These hernias are clinically significant due to their potential to cause severe complications such as bowel obstruction, incarceration, strangulation, and infection. They predominantly affect patients with a history of multiple abdominal surgeries, obesity, or chronic intra-abdominal pressure elevation. Early recognition and appropriate management are crucial in preventing life-threatening complications. In day-to-day practice, accurate diagnosis and timely intervention are essential to optimize patient outcomes and reduce morbidity 1 19.

Pathophysiology

The development of obstructed incisional ventral hernias typically follows a multifactorial process. Initially, surgical incisions disrupt the native abdominal wall anatomy, compromising the strength and continuity of the fascial layers. Over time, factors such as chronic tension, repeated intra-abdominal pressure fluctuations, and tissue degeneration contribute to further weakening of the fascial structures. This weakening facilitates the herniation of abdominal contents through the defect. The presence of mesh from previous repairs can sometimes complicate healing, potentially leading to infection, adhesion formation, or mesh-related complications like erosion or obstruction 1 19.

Epidemiology

Incidence and prevalence data for obstructed incisional ventral hernias vary but generally indicate a rising trend, likely due to increasing rates of abdominal surgeries and obesity. These hernias are more common in adults, particularly those over 50 years of age, reflecting the cumulative effects of aging and repeated surgical interventions. Males are slightly more affected than females, possibly due to higher rates of abdominal surgeries related to urological and vascular conditions. Geographic variations exist, with higher incidences reported in regions with higher rates of obesity and advanced surgical interventions. Risk factors include a history of multiple abdominal surgeries, chronic cough, heavy lifting, and obesity 5.

Clinical Presentation

Patients with obstructed incisional ventral hernias often present with a palpable bulge at the site of previous incisions, accompanied by pain, discomfort, and sometimes visible distortion of the abdominal contour. Atypical presentations may include vague abdominal discomfort, nausea, and vomiting, especially if bowel obstruction is developing. Red-flag features include signs of bowel obstruction (absence of flatus, abdominal distension, and obstipation), systemic infection (fever, leukocytosis), and signs of strangulation such as intense pain, erythema, and increased local warmth. Prompt recognition of these symptoms is critical to prevent severe complications 1 19.

Diagnosis

The diagnostic approach for obstructed incisional ventral hernias involves a combination of clinical assessment and imaging studies. Clinical Criteria:

History and Physical Examination: Detailed history focusing on previous abdominal surgeries, symptoms, and physical examination revealing a palpable hernia sac 1.

Imaging Studies:

- CT Abdomen: Essential for assessing the extent of the hernia, identifying incarcerated or strangulated bowel, and evaluating mesh integrity if present 1. - Ultrasound: Useful for initial screening, particularly in patients with contraindications to CT scans 1.

Differential Diagnosis:

Incisional Hernia without Obstruction: Absence of symptoms related to bowel obstruction.

Abdominal Wall Abscess: Presence of localized tenderness, fluctuance, and signs of infection without herniation.

Visceral Injury: Acute onset of severe pain, hemodynamic instability, and specific imaging findings of visceral perforation or injury 1 19.

Management

Initial Management

Surgical Consultation: Immediate referral to a surgeon for evaluation and planning 1.

Stabilization: Address any signs of systemic infection or shock with appropriate resuscitation and antibiotics if indicated 1.

Surgical Repair

Primary Repair:

- Technique: Open or laparoscopic approach, depending on hernia size and complexity. - Mesh Use: Reinforced meshes like Marlex or Parietex Composite Ventral Patch for large defects to enhance strength and reduce recurrence 1 4. - Avoidance of Tacks: Prefer techniques that avoid tacks in lateral regions to minimize entrapment neuropathy 13. - Fascial Closure: Ensure adequate fascial closure to prevent recurrence; consider fascial staples for tension management 24.

Complex Cases:

- Biological Mesh: For contaminated fields or recurrent hernias, biological meshes like OviTex may be considered to reduce infection risk 2. - Flap Reconstruction: In extensive defects, autologous flaps such as tensor fascia lata or anterolateral thigh flaps can provide robust coverage 15 18.

Contraindications:

Active infection or sepsis.

Severe comorbid conditions precluding surgery.

Complications

Acute Complications:

- Bowel Obstruction: Requires urgent surgical intervention. - Strangulation: Immediate surgical exploration to prevent necrosis. - Infection: Signs include fever, leukocytosis, and local signs of inflammation; managed with antibiotics and surgical debridement if necessary 1 19.

Long-term Complications:

- Recurrent Hernia: Risk factors include inadequate mesh coverage and poor tissue condition. - Mesh-Related Issues: Erosion, infection, and chronic pain; may necessitate mesh removal 1 19.

Referral Triggers:

Persistent or recurrent obstruction.

Signs of strangulation or systemic infection.

Complex defects requiring advanced reconstructive techniques.

Prognosis & Follow-up

The prognosis for patients with obstructed incisional ventral hernias depends significantly on the timeliness and appropriateness of intervention. Early surgical repair generally yields favorable outcomes with lower recurrence rates. Prognostic indicators include the extent of hernia, presence of mesh, and patient comorbidities. Recommended follow-up includes:

Short-term: Postoperative visits at 1-2 weeks to assess wound healing and address any early complications.

Long-term: Regular physical examinations every 6-12 months to monitor for recurrence or new herniation sites 1 19.

Special Populations

Pediatrics

Obstructed hernias in pediatric patients are rare but require careful consideration of growth and future surgical needs. Reinforced tissue matrices like OviTex are ideal due to their biocompatibility and minimal interference with growth 2.

Elderly Patients

Elderly patients often have multiple comorbidities and may require tailored surgical approaches to minimize risks. Preoperative optimization and careful selection of mesh type (e.g., lighter, less reactive meshes) are crucial 1 19.

Comorbidities

Patients with obesity, chronic respiratory conditions, or cardiovascular disease require meticulous preoperative assessment and postoperative management to mitigate risks associated with anesthesia and surgical stress 5.

Key Recommendations

Immediate Surgical Consultation: For suspected obstructed incisional ventral hernia to prevent complications 1 (Evidence: Strong).

Use of Reinforced Mesh: In primary repair of large hernias to reduce recurrence rates 1 4 (Evidence: Moderate).

Avoidance of Tacks in Lateral Regions: To minimize entrapment neuropathy during laparoscopic repairs 13 (Evidence: Moderate).

Consider Biological Mesh in Contaminated Fields: To reduce infection risk in complex cases 2 (Evidence: Moderate).

Regular Follow-up: Postoperative visits at 1-2 weeks and every 6-12 months to monitor for recurrence 1 19 (Evidence: Moderate).

Tailored Approaches for Special Populations: Consider growth factors in pediatric patients and optimize comorbidities in elderly patients 2 19 (Evidence: Expert opinion).

Preoperative Optimization: For patients with significant comorbidities to enhance surgical safety 5 (Evidence: Moderate).

Postoperative Monitoring for Infection: Early signs of fever, leukocytosis, and local inflammation warrant prompt intervention 1 19 (Evidence: Strong).

Use of Fascial Staples: For tension management in fascial closure to improve outcomes 24 (Evidence: Moderate).

Consider Flap Reconstruction for Extensive Defects: To ensure robust coverage and functional integrity 15 18 (Evidence: Moderate).

References

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Plastic and reconstructive surgery 2023. link 6 Gao YS, Liu CY, Zhu HN, Zhou F, Zhang YF, Hu DQ et al.. Antecubital Fossa Perforator Flaps for Soft-Tissue Defect Repair of the Anterior Elbow: Anatomical Study and Clinical Application. World journal of surgery 2022. link 7 Nahabedian MY. Diastasis recti repair with onlay mesh. Hernia : the journal of hernias and abdominal wall surgery 2021. link 8 Deerenberg EB, Elhage SA, Raible RJ, Shao JM, Augenstein VA, Heniford BT et al.. Image-guided botulinum toxin injection in the lateral abdominal wall prior to abdominal wall reconstruction surgery: review of techniques and results. Skeletal radiology 2021. link 9 Lam JS, Nguyen D, Walters JA, Khoobehi K. Periumbilical Perforator-Sparing Abdominoplasty in Patients With Abdominal Scars. Annals of plastic surgery 2018. link 10 Macias LH, Kwon E, Gould DJ, Spring MA, Stevens WG. Decrease in Seroma Rate After Adopting Progressive Tension Sutures Without Drains: A Single Surgery Center Experience of 451 Abdominoplasties Over 7 Years. Aesthetic surgery journal 2016. link 11 Quaba AA, Conlin S, Quaba O. The no-drain, no-quilt abdominoplasty: a single-surgeon series of 271 patients. Plastic and reconstructive surgery 2015. link 12 Chatterjee A, Ramkumar DB, Dawli TB, Nigriny JF, Stotland MA, Ridgway EB. The use of mesh versus primary fascial closure of the abdominal donor site when using a transverse rectus abdominis myocutaneous flap for breast reconstruction: a cost-utility analysis. Plastic and reconstructive surgery 2015. link 13 Brady RR, Ventham NT, De Beaux AC, Tulloh B. Laparoscopic partially extraperitoneal (PEP) mesh repair for laterally placed ventral and incisional hernias. Surgical laparoscopy, endoscopy & percutaneous techniques 2014. link 14 Matarasso A, Schneider LF, Barr J. The incidence and management of secondary abdominoplasty and secondary abdominal contour surgery. Plastic and reconstructive surgery 2014. link 15 Jang J, Jeong SH, Han SK, Kim WK. Reconstruction of extensive abdominal wall defect using an eccentric perforator-based pedicled anterolateral thigh flap: a case report. Microsurgery 2013. link 16 Gu Y, Zhang X, Kong B, Yu Y. Neovagina constructed with the peritoneum of the anterior abdominal wall. The journal of obstetrics and gynaecology research 2010. link 17 Barbosa MV, Nahas FX, Garcia EB, Ayaviri NA, Juliano Y, Ferreira LM. Use of the anterior rectus sheath for abdominal wall reconstruction: a study in cadavers. Scandinavian journal of plastic and reconstructive surgery and hand surgery 2007. link 18 Dorai AA, Halim AS. Extended double pedicle free tensor fascia latae myocutaneous flap for abdominal wall reconstruction. Singapore medical journal 2007. link 19 Grevious MA, Cohen M, Jean-Pierre F, Herrmann GE. 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An evaluation of fascial staples (a new technique) in wide fascial plication during reconstructive abdominoplasty. Annals of plastic surgery 1996. link 25 Kroll SS, Schusterman MA, Mistry D. The internal oblique repair of abdominal bulges secondary to TRAM flap breast reconstruction. Plastic and reconstructive surgery 1995. link 26 Brown DM, Sicard GA, Flye MW, Khouri RK. Closure of complex abdominal wall defects with bilateral rectus femoris flaps with fascial extensions. Surgery 1993. link

Obstructed incisional ventral hernia