Introduction to biomechanics


VAX-D Results

Vertebral axial decompression therapy isparticularly, by lying down, which
a very useful tool for people who haveunloads the spine and reduces
horrible back problems because it isintradiscal pressure. The causes of
relatively inexpensive and it does notmechanical low back pain may include
involve surgery. Data was collecteddegenerative disc disease, degenerative
from twenty-two medical centers forspondylosis with limitation of range of
patients who received VAX-D therapy formotion, facet arthropathy, relative
low back pain, which was sometimeslateral recess stenosis from a
accompanied by referred leg pain. Onlycombination of the above,
patients who received at least tenmicroenvironment presure changes
sessions and had a diagnosis ofaffecting the thecal and epidural space
herniated disc, degenerative disc, orfrom disc bulging, subligamentous and/or
facet syndrome, which were confirmed byextruded herniation, and segmental
diagnostic imaging, were included ininstability.
this study.A number of potential mechanisms are
The data contained the patients'specifically addressed by the lumbar
quantitative assessments of their ownvertebral body separation achieved
pain, mobility, and ability to carry outduring therapy. With aging, disc
the usual 'activities of daily living'.desicction occurs, disc height is lost,
The treatment was successful in 71% ofand this process is accelerated with
the 778 cases, when success was definedactivities which produce high physical
as a reduction in pain to 0 or 1, on a 0loading of the lumbar spine. Osteophytes
to 5 scale. Improvements in mobility anddevelop along the anterolateral and
activities of daily living correlatedposterior border of the vertebral
strongly with pain reduction. The causesbodies, and facet arthropathy increases
of back pain and their relationship toas degenerative disc change advances .
this therapy are also discussed.Normal vertebral body separation is lost
Although imaging procedures, includingas the disc degenerates. blood supply
CT and MRI, are able to accuratelyto the nerve roots of the cauda equina
define structural pathology, theis sensitive to compression. Even at
correlation of these anatomic findingspressures of only 5-10 mmHg, the flow in
with physiology, back pain, and otherover 20% of the venules was completely
clinical complaints is imprecise.stopped. Flow in all the capillaries
Although surgical decompression,stopped at pressures between 20 and 50
epidural blocks, and spinalmmHg. A pressure of 30 mmHg is slightly
instrumentation can sometimes helpless than one pound per square inch, so
patients suffering from back pain, thesesolute transport is easily reduced. Even
treatments do not completely take thevertebral distractions of 1 or 2 mm per
biomechanical function of the disc intodisc would reduce ligamental redundancy
account, and may leave patientsand help to restore canal/foraminal
unrelieved of their suffering.patency, reduce venous congestion and
Low back pain is aggravated byincrease axoplasmic flow.
activities that increase axial loadingFor greater resources on Vax-D and
on the spine, such as sitting, standing,especially about spine or even about
and lifting. Patients may describe someLumbar please visit these links.
relief with walking, but more



1 A B C D 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102