What Is Vacuum Phenomenon

Vacuum phenomenon a linear or oval radiolucency in the intervertebral disc space that corresponds to gas a typical finding of osteonecrosis.

What is vacuum phenomenon.

Nitrogen and traces of oxygen and or carbon dioxide within different specific tissues 1 3. The gas is just air primarily nitrogen and can be detected via x rays. The sign is specific for local bone ischemia associated with a non healing vertebral collapse and pseudarthrosis. Vacuum phenomena describe aseptic gas collections e g.

The vacuum phenomenon appears as a radiolucent area visible in synovial joints intervertebral disks and vertebrae this phenomenon is explained by gas accumulation mostly nitrogen produced by the surrounding soft tissues in synovial joints this phenomenon is related to the distraction of the articular surfaces in intervertebral disks the vacuum phenomenon is in most cases. The term discogenic claudication is proposed to describe clinical pictures of the vacuum sign. Since discs are integral to anterior spinal support vacuum disc is considered to be a sign of instability. Further views to clarify this appearance are not required.

Usually they are seen within the intervertebral discs the bones and within different joints but can also be seen in other usually adjacent locations due to migration. It usually represents advanced disc degeneration. Vacuum phenomena involving the intervertebral discs is usually a result of an accumulation of gas principally nitrogen within the crevices of the intervertebral discs or adjacent vertebrae. Vp is a useful pain and fusion indicator in painful spine with or without deformities.

Recognising vacuum phenomenon can be useful in cases where the referring doctor may not be familiar with this appearance and requests further views or comparison views. Intervertebral disc vacuum phenomenon.