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Abdominal wall closure after selective aponeurotic incision and undermining
F X Nahas1, J Ishida, R Gemperli
1Division of Plastic Surgery, University of São Paulo School of Medicine, Hospital Jaraguá, Brazil.
Annals of Plastic Surgery
|December 30, 1998
Summary
Dissecting the rectus sheath and external oblique muscle significantly reduces abdominal wall tension. This makes surgical repair of abdominal wall defects easier by allowing greater advancement of the aponeurotic edges.
Area of Science:
- Abdominal wall surgery
- Surgical anatomy
- Biomechanical analysis
Background:
- Abdominal wall defects often require complex surgical repair.
- Understanding the biomechanics of rectus sheath tension is crucial for effective closure techniques.
Observation:
- Tension required to mobilize anterior and posterior rectus sheaths was measured in cadavers.
- Traction index was calculated before and after sequential dissection of rectus sheath and oblique muscle.
Findings:
- Significant reduction in aponeurotic resistance was observed after each dissection step.
- Anterior rectus sheath demonstrated higher traction resistance than the posterior sheath.
- No significant difference in resistance was found between supraumbilical and infraumbilical levels.
Implications:
- Dissection techniques effectively decrease tension, aiding abdominal wall closure.
- These findings support the use of muscle and sheath undermining for closing abdominal wall defects.
- Reduced tension facilitates greater advancement of aponeurotic edges in reconstructive surgery.