Cardiothoracic Hernia Back to Hernia products Back to Product Overview				Hernia Trainer  Item 4021 For teaching patch anchoring techniques. Anchoring mesh patches into the lower abdomen for hernia repair can be a challenging undertaking. Our Hernia Trainer with full-thickness Replacement Skin (Item 4022) or Thinner Replacement Skin (Item 4030) has a foam inner layer bonded to a skin outer layer for practicing anchor deployment. These models have proven useful in teaching and learning procedure techniques.