TissueDB/Structures/Umbilicus
The umbilicus is the central landmark on the abdomen, often used as an entry site for laparoscopy and as a landmark for midline laparotomy incisions.[1][2][3]
Component Tissues
| Tissue | Layer/Position | Key Properties |
|---|---|---|
| Skin | Superficial | Minimal subcutaneous tissue; nearly direct contact with fascia at center |
| Umbilical fascia | Central | Provides characteristic "pop" tactile feedback on penetration |
| Transversalis fascia | Deep | Requires recognition and penetration |
| Peritoneum | Deepest | Entry confirmation through peritoneal breach |
References
[edit source]- ↑ Alkatout I, et al. "Complications of laparoscopy in connection with entry techniques." J Turk Ger Gynecol Assoc. 2015. PMC4664217
- ↑ Vilos GA, et al. "Laparoscopic entry: a review of techniques, technologies, and complications." J Obstet Gynaecol Can. 2007. PubMed 17346485
- ↑ Azevedo JL, et al. "Injuries caused by Veress needle insertion for creation of pneumoperitoneum." Surg Laparosc Endosc Percutan Tech. 2009. PubMed 19542840
Additional Information
Things to Look Out For
- Simulating uniform depth for all patients — entry depth varies by patient; trainees must adapt insertion force and technique based on simulated BMI to develop safe depth control
- Placing vessels far from entry path — trainees must develop awareness of vascular proximity at the umbilicus
- Using identical fascia thickness throughout — the umbilicus has distinct tissue properties compared to lateral abdominal wall; variable fascia resistance trains accurate layer recognition
- Ignoring anatomical variation in entry resistance — realistic haptic differentiation between skin, fascia, and peritoneum prevents dangerous techniques that rely on force rather than tactile feedback
Overview
The umbilicus is the unique midline location where skin and peritoneum are separated by fascia alone, with no intervening muscle layer. This anatomical distinction makes it the primary entry point for laparoscopic procedures and a critical landmark for open abdominal surgery.
Synonyms
- Navel
- Umbilical scar (post-involution)
- Midline entry point
Related Structures
- Abdominal Wall — Full layer context including umbilicus
Anatomical Description
The umbilicus is the only abdominal location where skin and peritoneum are separated by fascia alone, with no intervening muscle layer. Fascial penetration produces a characteristic "pop" that provides critical tactile feedback for safe entry.