The preperitoneal space is the layer of fat and loose tissue between the transversalis fascia and the parietal peritoneum of the anterior abdominal wall. In the groin it widens into the space of Bogros laterally and connects with the retropubic space of Retzius medially.
| Location | Lower anterior abdominal wall, deep to the transversalis fascia. |
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Provides a surgical plane between the muscles of the abdominal wall and the peritoneum.
Laparoscopic inguinal hernia repairs (TEP and TAPP) place mesh in the preperitoneal space to cover the direct, indirect and femoral hernia sites together. The inferior epigastric vessels run in this layer. It is also used for preperitoneal catheter and nerve block placement.
Bleeding into the preperitoneal space, for example after inferior epigastric vessel injury from a laparoscopic port, causing lower abdominal wall swelling and pain.
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