TissueDB/Sandbox/Abdominal Wall Simulator (Simulator Placeholder)

▼This page is a tissue entry for the SELF Tissue Database.It documents the structures, recommended materials, and related simulators associated with this tissue to support low-cost, reproducible surgical simulator development.

Image: Public Domain by SSGT Jacob N. Bailey, U.S. Air Force via Wikimedia Commons

The Abdominal Wall Simulator trains recognition of fascial "pops" during trocar insertion and depth awareness across variable patient body habitus.

1. Gather materials: EVA foam (skin), felt sheets (fascia), sponge (muscle), thin silicone (peritoneum)
2. Layer materials in anatomical order with appropriate thicknesses
3. Secure layers in box trainer or frame
4. Test fascial penetration resistance (3-8N target)
5. Mark danger zone 2-4cm behind peritoneum layer

See linked Materials pages for cultural and infrastructure accessibility information.

1. Cut EVA foam to trainer frame dimensions because consistent sizing ensures proper fit.
2. Checkpoint: Foam should compress 30-50% under finger pressure.

1. Cut felt to same dimensions because fascial layers must align with skin.
2. Position felt 1-2cm below foam surface because this creates realistic depth.
3. Checkpoint: Penetrating felt with probe requires distinct force increase (3-8N).

1. Add sponge layer for muscle simulation because compressibility provides tactile feedback.
2. Add thin silicone as final peritoneum layer because this provides visual confirmation of entry.
3. Place red marker 2-4cm behind peritoneum because this represents vascular danger zone.
4. Checkpoint: Complete assembly shows 4+ distinct layers when viewed in cross-section.

• Recognize fascial "pops" during controlled trocar advancement
• Develop depth awareness across different body habitus
• Practice Veress needle insertion technique
• Learn safe entry zone identification

1. Mount assembled layers in box trainer or dedicated frame.
2. Position at 30-45° angle to simulate patient positioning.
3. Ensure adequate lighting to observe entry confirmation.

• Silicone peritoneum: Replace after 5-10 punctures
• Felt fascia: Replace after 10-20 punctures
• Foam/sponge: Reusable 50+ times

⚠️ Antiskill alert: The following design flaws create negative transfer to clinical practice.

1. Only 2-3 layers — Creates unrealistic feedback; use minimum 4 layers to represent distinct anatomical planes.
2. Uniform thin build — Trains only for thin patients; create BMI variants (1cm, 3cm, 5cm fat layer).
3. No fascial "pop" — Trainees cannot recognize safe entry; add distinct penetration-resistant layer.
4. Nothing behind peritoneum — Creates false safety assumptions; add depth marker or vessel representation.

Level: Face validity

Evidence: Expert surgeon review confirms anatomical plausibility

Citation: Kailavasan M, et al. World J Surg. 2020. PMID 31897696

Limitations: Force measurements not yet validated against cadaveric tissue

• Abdominal Wall — Component tissues
• Adipose Tissue — Fat layer simulation
• Fascia — Fascial layer properties