Epidural venous plexus

Network of veins in the epidural space of the spine

The epidural venous plexus is a network of veins located in the epidural space of the spine. This venous plexus is an important structure in the vertebral column and plays a crucial role in the venous drainage of the spinal cord and the vertebrae.

Anatomy

The epidural venous plexus is situated within the epidural space, which lies between the dura mater and the vertebral periosteum. It extends from the foramen magnum at the base of the skull to the sacrum. The plexus is divided into anterior and posterior components:

• Anterior internal vertebral venous plexus: Located anterior to the dura mater and posterior to the vertebral bodies.
• Posterior internal vertebral venous plexus: Located posterior to the dura mater and anterior to the vertebral arch.

Function

The primary function of the epidural venous plexus is to facilitate the venous drainage of the spinal cord and the vertebrae. It connects with the external vertebral venous plexus and the basivertebral veins, allowing for the drainage of blood from the spinal cord and the vertebral bodies into the systemic circulation.

Clinical Significance

The epidural venous plexus is clinically significant for several reasons:

• Epidural anesthesia: The plexus is a landmark for the administration of epidural anesthesia, which is commonly used for pain relief during childbirth and certain surgical procedures.
• Spinal metastasis: The plexus can serve as a pathway for the spread of metastatic cancer to the spine.
• Venous congestion: Conditions such as spinal stenosis or vertebral fractures can lead to venous congestion within the plexus, potentially causing neurological symptoms.

Related Pages

• Epidural space
• Spinal cord
• Vertebral column
• Dura mater
• Epidural anesthesia
• Spinal stenosis
• Vertebral fracture