What Is an Epidural Needle?
A narrow space between the dura mater and the periosteum of the spinal canal is called the epidural space. It contains lymphatic vessels, vertebral venous plexus, loose connective tissue and adipose tissue
Epidural space
Right!
- Chinese name
- Epidural space
- Foreign name
- epidural space
- Nature
- Biological tissue
- Types of
- Proper noun
- A narrow space between the dura mater and the periosteum of the spinal canal is called the epidural space. It contains lymphatic vessels, vertebral venous plexus, loose connective tissue and adipose tissue
- Located in the narrow space between the spinal canal periosteum and the dura mater, it is filled with fat, intravertebral venous plexus and lymphatic vessels, and the spinal nerve root and its accompanying blood vessels pass through, showing negative pressure. The upper end of this cavity starts from
- The sacral nerve roots in the sacral canal are listed in the epidural space, enclosing nerve sheaths that extend from the dura mater. The l ~ 3 phrenic nerve sheath is thicker and there is more peripheral fat, which may be the cause of insufficiency of phrenic nerve anesthesia. The distance from the sacral canal to the lower end of the final pond was 5.7 cm on average. Vertebral venous plexus: divided into internal vertebral venous plexus and extravertebral venous plexus according to site. The vertebral venous plexus is densely packed in the epidural space, and it extends from the foramen magnum, down to the tip of the sacrum, and runs through the entire length of the spinal canal. The extravertebral venous plexus is located outside the spine, in front of the vertebral body, behind the vertebral arch and its protrusions, and is more developed between the atlas and the occipital bone. It is called the suboccipital venous plexus. The two plexuses communicate with each other without valves, and the venous blood from the spine, spinal cord, and adjacent muscles is collected and merged into the vertebral vein, posterior intercostal vein, lumbar vein, and lateral iliac vein. The upward communication with the occipital sinus and sigmoid sinus in the cranial anatomy, and the anastomosis with the pelvic veins, so the vertebral venous plexus is an important channel for communication between the superior and inferior vena cava and the intracranial and external veins. When organs such as the pelvis, abdomen, and thorax are infected, tumors, or parasitic diseases, they can invade the intracranial or other distant organs through the vertebral venous plexus.