Lateral Canals of the Peritoneal Cavity [Canales Laterales (Cavi Peritonei), Pna]

Lateral canals of the peritoneal cavity [Canales Laterales (Cavi Peritonei), Pna]: anatomy and functions

The lateral peritoneal canals, also known as cavi peritonei or PNA (parietal peritoneal attachment), are parts of the peritoneal cavity located between the parietal peritoneum and the ascending (right lateral canal) or descending (left lateral canal) colon.

Anatomy

The lateral channels of the peritoneal cavity have the shape of a triangle and are located inside the fatty layer that covers the mesenteric artery. They begin at the base of the small pelvis and rise up the side wall of the abdominal cavity, reaching the level of the 11th rib.

The right lateral canal is located between the mesenteric artery and the ascending colon, and the left is between the mesenteric artery and the descending colon. Each lateral canal consists of two layers of parietal peritoneum, which form the nuchal fold, and contains adipose tissue, blood and lymphatic vessels, nerves and lymph nodes.

Functions

The lateral channels of the peritoneal cavity perform a number of functions. They serve as support and protection for the mesenteric artery, which is an important vessel providing blood supply to the stomach, liver, pancreas and duodenum.

In addition, the lateral channels are involved in abdominal drainage and the lymphatic drainage system. They collect lymph from the abdominal cavity and send it to the lymph nodes, which allows the abdominal cavity to maintain normal fluid levels.

Conclusion

The lateral canals of the peritoneal cavity are an important element of the anatomy of the abdominal cavity. They serve to support and protect the mesenteric artery and are also involved in abdominal drainage and the lymphatic drainage system. Understanding the anatomy and function of the lateral canals of the peritoneal cavity is important for practitioners, especially when performing laparoscopic abdominal surgery.

The lateral canals of the peritoneal cavity are parts of the peritoneal cavity located between the parietal peritoneum and the ascending (right lateral canal) or descending (left lateral canal) colon. These channels are formed due to the departure of the peritoneum from the side walls of the abdomen and its transition to the colon. The lateral canals are of important clinical importance, since effusions and pus can accumulate in them during inflammatory diseases of the abdominal organs. A correct understanding of the anatomy of these formations is necessary for surgeons to make an accurate diagnosis and choose the optimal treatment tactics.