Introduction to biomechanics


VAX-D Results

Vertebral axial decompression therapy is awalking, but more particularly, by lying
very useful tool for people who have horribledown, which unloads the spine and reduces
back problems because it is relativelyintradiscal pressure. The causes of
inexpensive and it does not involve surgery.mechanical low back pain may include
Data was collected from twenty-two medicaldegenerative disc disease, degenerative
centers for patients who received VAX-Dspondylosis with limitation of range of
therapy for low back pain, which wasmotion, facet arthropathy, relative lateral
sometimes accompanied by referred leg pain.recess stenosis from a combination of the
Only patients who received at least tenabove, microenvironment presure changes
sessions and had a diagnosis of herniatedaffecting the thecal and epidural space from
disc, degenerative disc, or facet syndrome,disc bulging, subligamentous and/or extruded
which were confirmed by diagnostic imaging,herniation,  and  segmental  instability.
were  included  in  this  study.
A number of potential mechanisms are
The data contained the patients' quantitativespecifically addressed by the lumbar
assessments of their own pain, mobility, andvertebral body separation achieved during
ability to carry out the usual 'activities oftherapy. With aging, disc desicction occurs,
daily living'. The treatment was successfuldisc height is lost, and this process is
in 71% of the 778 cases, when success wasaccelerated with activities which produce
defined as a reduction in pain to 0 or 1, onhigh physical loading of the lumbar spine.
a 0 to 5 scale. Improvements in mobility andOsteophytes develop along the anterolateral
activities of daily living correlatedand posterior border of the vertebral bodies,
strongly with pain reduction. The causes ofand facet arthropathy increases as
back pain and their relationship to thisdegenerative disc change advances . Normal
therapy  are  also  discussed.vertebral body separation is lost as the disc
degenerates. blood supply to the nerve
Although imaging procedures, including CT androots of the cauda equina is sensitive to
MRI, are able to accurately define structuralcompression. Even at pressures of only 5-10
pathology, the correlation of these anatomicmmHg, the flow in over 20% of the venules was
findings with physiology, back pain, andcompletely stopped. Flow in all the
other clinical complaints is imprecise.capillaries stopped at pressures between 20
Although surgical decompression, epiduraland 50 mmHg. A pressure of 30 mmHg is
blocks, and spinal instrumentation canslightly less than one pound per square inch,
sometimes help patients suffering from backso solute transport is easily reduced. Even
pain, these treatments do not completely takevertebral distractions of 1 or 2 mm per disc
the biomechanical function of the disc intowould reduce ligamental redundancy and help
account, and may leave patients unrelieved ofto restore canal/foraminal patency, reduce
their  suffering.venous congestion and increase axoplasmic
flow.
Low back pain is aggravated by activities
that increase axial loading on the spine,For greater resources on Vax-D and especially
such as sitting, standing, and lifting.about spine or even about Lumbar please visit
Patients may describe some relief withthese links.



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