Is VAX-D the same as Traction?
How is VAX-D different than other devices?
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Many patients and physicians have asked if VAX-D
Treatment is any different than ‘traction’. In addition,
the emergence and success of VAX-D Therapy has spawned a
host of new medical devices (copycats) all claiming to
be the same as VAX-D in their principles of operation
and in their success rates. This has created a lot of
confusion and questions about their similarities and
effectiveness.
These
devices claim to utilize newer ‘state of the art
technology’ equivalent or superior to VAX–D Therapy.
They claim to have equal or greater success rates than
VAX-D (as high as 86%) with less complications, and at
cheaper prices. Upon investigation, you will find that
these statements are just not true. In fact, virtually
all of the VAX-D imitators are using linear traction
technology. This means an electric motor and winch and
cable mounted in a column or attached to the end of a
table on a bracket. These devices are actually using
traction technology that emerged prior to 1986.
This is a very revealing
excerpt from the Food and Drug Administration 510(k)
clearance for the copycat product:
"The _____ System incorporates various principles and
working characteristics of the predicate device the
Tru-Trac 401 Traction Device (1986). A traction unit is
mounted onto a separate vertical structure at the foot
of the bed. The incorporation of the traction device and
flat surface bed, whilst giving a new overall appearance
to the apparatus has not impacted or changed the
effectiveness of the device. The system is designed to
provide static, intermittent and cycling distraction
forces.
The Tru-Trac 401 has been in use in this country for
more than ten years. The intent was to incorporate an
existing and well tried device and produce an
aesthetically pleasing medical device."
They also make all kinds of
statements in their promotional campaigns that are not
based upon scientific research. The following claim is
an example:
"Research using the VAX-D machine shows a decrease in
intradiscal pressure. Any traction protocol that uses
the right amount of force and protocol will have the
same positive results shown in the research. In other
words, the decompression phenomenon is not unique to the
VAX-D, but can be replicated on any traction machine."
This is like saying, because a ‘Formula 1’ car can do
200 mph, therefore all cars can do 200 mph. They all
claim to achieve decompression of intervertebral discs,
however there are no published clinical studies using
pressure monitors to support their claims. You will note
that most of them quote VAX-D research in their
promotional campaigns and websites. Many of their
so-called ‘clinical studies’ are not published in
peer-reviewed medical journals. Unfortunately, linear
traction has not been shown to lower intradiscal
pressures, and has had a dismal track record with
chronic low back pain, and is even contra-indicated for
patients with herniated discs!
VAX-D® is patented technology that is producing
consistent results (70% success rate) in each of the
300+ systems in the field. Some of the current traction
tables make the claims that VAX-D is actually simply a
programmed intermittent traction mode. They claim that
the same forces and cycling can be replicated with their
traction tables by entering the appropriate ramping,
static, rest and hold cycle programs. These claims are
just not true.
History of
Traction:
Traction has been in use for
many years as an unsupervised physical therapy modality.
A variety of devices have been utilized to apply
traction forces in novel ways, such as electronic motors
with winch and cable mounted on the table or in a
separate column, bed traction with weights, split/
floating tables, tilt tables, gravity inversion devices
etc.
According to the orthopedic text ‘Adult Spine-Principles
and Practice,’ "at least seven randomized clinical
trials of conventional traction have been published,
with striking consistency in their results. None of
those trials demonstrated any significant benefit for
traction over the control treatment. The control
treatments in these studies included sham traction, bed
rest, heat and massage.
This data clearly supports the consensus view of the
Quebec Task Force on Spinal Disorders which concluded
that there was no scientific evidence to support the use
of spinal traction in the either the diagnosis or
treatment of low back pain and discogenic disease."
Many years ago a pioneer in the back pain field named
Cyriax hypothesized that distraction should be able to
produce negative intradiscal pressure, which, if strong
enough, could suck a herniated disc back in. Another
researcher Kuslich stated that "we may find a really
effective treatment for low back pain and sciatica when
we learn how to decompress a nerve atraumatically.
Anderson and Nachemson placed pressure transducers in
four subjects in the lumbar spine during autotraction
and manual traction procedures. They found that the
intradiscal pressures went up dramatically in both
cases. They concluded that at no time was negative
intradiscal pressure observed, and therefore the disc
could not be sucked back in as proposed by Cyriax.
They suggested that in order to produce a relative
reduction in disc pressure, traction must be
administered in such a way as to allow trunk muscle
relaxation. Traction can be expected to increase
intradiscal pressure and could therefore aggravate a
protruded, herniated or extruded disc.
Intuitively,
lumbar decompression should be successful in alleviating
many of the conditions which cause low back pain and
associated radiculopathy. The successful application of
lumbar distractive forces was limited by the design of
mechanical devices.
VAX-D Therapy vs Traction Devices
Technological
advances have now led to the development of equipment,
the VAX-D Therapeutic Table and Console. The equipment
allows controllable, effective axial distraction and
decompressive tensions to be applied to the lumbar
vertebral column. Distractive forces are applied and
released in a progressive logarithmic fashion.
With conventional mechanical traction applied to the
lumbar area, patients are treated in the supine (face
up) position. With these devices the patient’s upper
body is secured and restrained with a chest harness
(referred to as thoracic restraint). These tend to
restrict respiration, and they may compromise venous
return to the heart. More importantly, restraint of the
upper body with chest harnesses rapidly causes trunk
muscles and paravertebral muscles to guard against the
pull, resist the tension, and then contract and resist.
As demonstrated in the literature, this results in an
increase in intradiscal pressure. This is actually
‘contraindicated’ in the treatment of compressed discs
and spinal structures.
Gravity lumbar traction utilizes the body’s own weight
as the source of traction force. Traction force is
increased by increasing the angle of incline. There is a
potential for brachial plexus nerve compression and
damage in the axillae (under arm). The greatest limiting
factor has been chest pain caused by chest compression.
Several investigators have documented the adverse
respiratory effects with chest compression. Trunk muscle
contraction also tends to increase intradiscal pressure.
VAX-D
patients are placed in a prone position and utilizes
handgrips which the patient grasps with
arms extended above the head (like hanging from a bar)
to stabilize and restrain the upper body during lumbar
distraction. Thoracic restraints are not used and there
is no risk of chest compression and circulatory or
respiratory compromise. Although holding on to handgrips
may create some transient discomfort in the shoulders
for a few patients, the stress on the shoulder girdle
attests to the fact that the tension applied to the
pelvis is, in fact, transmitted along the linear axis of
the spinal column rather than via muscular recruitment
that tends to be elicited when chest harnesses are
employed.
The principles utilized in the treatment are patented
(an operational patent or procedure patent). It is
noteworthy that VAX-D as been recognized by the US
government through the granting of US Patent No.
6,039,737 entitled ‘The Operation of a Vertebral Axial
Decompression Table.’ This patent describes the
complicated therapeutic equation and defines the
logarithmic time/tension relationship. Traction devices
are not capable of applying tension in a logarithmic
time relationship.
Conventional
traction devices apply traction forces by winding a
cable around a pulley by an electric motor. The
motor/device has several programmable modes to apply
force in a linear fashion. Forces can be applied
statically, stepwise (often called ‘dynamic or
progressive’) in a cyclic fashion or in a combination of
these. The forces are applied to a harness fitted to the
patient, not to the movable sections. The VAX-D Table
does not utilize gradual step-wise traction. The winch
and cable mechanism common to these traction devices
does not incorporate VAX-D patented technology, yet many
refer to VAX-D published research to support their
advertising claims.
The VAX-D Table utilizes pneumatic cylinders coupled
with hydraulic damping, as the drive/damping mechanism
for the pre-tension and for the therapeutic program. The
technology applies and maintains a baseline tension of
20-24 pounds (the pre-tension) to the patient’s pelvis
throughout the treatment session (even during the rest
periods) and the distraction cycles then move from the
pre-tension range up to a pre-selected therapeutic
tension. The above parameters are absolutely critical to
the success of the treatment.
The
pneumatic-hydraulic cylinders are used to separate the
lower table section from the upper section and apply the
tensions to the patient’s pelvis. The
pneumatic--hydraulic drive mechanism, as compared to the
cable and pulley mechanism of most devices, provides for
a precise control of the amount of tension and is able
to apply tensions in a logarithmic time/force curve.
The pneumatic-hydraulic drive mechanism is applied in
both the distraction and retraction movements of the
Table providing for a smooth, controlled operation and a
gradual return of the patient to the starting position
each time.
The pelvis is secured with a patented harness that
adjusts snugly and is designed to apply forces primarily
to the lateral pelvic alae thus minimizing
anterior-posterior pressures.
To achieve optimum control of the application of
distractive tensions it was found essential to develop a
harness that would attach directly to an electronic
tensionometer that continuously monitors and provides
feed-back of the tensions being applied to the spinal
column. This harness is the subject of an individual
patent issued in May of 1992 (Patent No. 5,115,802). The
harness design also facilitates proper placement
necessary to attain reproducible results.
There is now a body of research (see clinical studies in
this website) that distinguishes and establishes VAX-D
technology as the conservative treatment of choice for
herniated and degenerative discs.
Decompression Therapy
There is also
a lot of confusion and questions regarding a host of new
medical devices on the market all claiming to utilize
‘decompression therapy’ for the treatment of low back
pain.
A clinical study on nerve root decompression states the
following:
"Traditionally, the term ‘decompression’ as applied to
the spine has referred to nerve root decompression.
Surgery for decompression has been directed at the
radiographic sites of nerve root entrapment including
the removal of herniated disc material or osteophytes
(relief of neurocompression). Surgery is often focused
on nerve root decompression to relieve radicular pain
and any improvement in back pain follows as a secondary
benefit."
"Dermatomal
Somatosensory Evoked Potentials (DSSEP’s) are an
established effective tool for assessing single nerve
root function pre- and post-operatively. Successful
treatment by VAX-D therapy resulted in clinical
reduction in pain and improved DSSEP waveforms
suggesting that nerve root decompression is occurring at
multiple levels (Naguszewski W. Naguszewski R., Gose
E.)."
The
manufacturers of todays so-called ’decompression’
devices produce abundant amounts of marketing materials
claiming success rates of 85% plus. They make claims of
‘revolutionary breakthroughs’ and of utilizing ‘state of
the art technology’ and ‘high tech pain reduction and
healing systems’. All of this without published peer
reviewed clinical research studies on intradiscal
pressures or patient outcomes to support their claims.
When considering any treatment, ask if the studies are
valid. Who performed the study and what are their
credentials? Was the study published in a peer reviewed
(recognized) medical journal?
These devices claim to have a similarity in design and
function to the VAX-D Therapeutic Table (which has a
history of clinical research and studies published in
the medical literature). Many of them actually utilize
advertising with claims based upon research conducted on
the VAX-D Therapeutic Table. You will also find that
they operate smear campaign with malicious statements
regarding VAX-D. The following quotes are examples:
o"the patient has nothing to do but hold on to the hand
posts, which is often very boring" o "the VAX-D table
was also shown to cause the vacation of blood flow in
the patient’s back as well as constriction of spinal
fluids" o "VAX-D has been know to tear patient’s rotator
cuff during treatment" o"VAX-D is utilizing older
technology, thereby, making it more user unfriendly and
operator specific" o"VAX-D has no built in CD player to
allow patients to relax and often fall asleep". In our
view this type of personal assault campaign is unethical
and really represents misdirected anger at the leader in
the industry. These comments wouldn’t be necessary if
they could market their devices on their own merits.
Decompression is defined as "a relief or reduction of
pressure". The fact is, the only way to measure disc
decompression (ie decreases in intradiscal pressure) is
through the use of pressure sensing equipment, in a
closed system, that has been introduced into the
intervertebral disc, and measures pressure changes.
Despite the claims, pressure changes simply cannot be
measured by radiography or fluoroscopy.
Have a close look at these revolutionary devices. Do
they have an electric motor, winch and cable mounted on
the table or in a column? None of these systems
incorporate the principles and working characteristics
of the VAX-D Therapeutic Table as they state. The
principles and working characteristics of the VAX-D
Table are in fact patented in the United States and
Internationally.
Misleading
Advertising: Is it legal or illegal?
According to the Federal Food,
Drug & Cosmetic Act (FFDCA-Section 502) a product is
considered ‘Misbranded’ if its promotional material and
labeling are false or misleading in any manner. Section
502(a) declares that a drug or device is misbranded if:
(a) its labeling proves false or misleading in any
particular. This phrase "false or misleading" is not
confined in meaning to untrue, forged, fraudulent, or
deceptive. In fact, the word, statement, or illustration
may be true in the strict sense of the word; however,
the labeling can be deemed by the FDA to be in violation
of the law if it proves deceptive to the customer. It is
not a necessary condition that the labeling should be
flatly and baldly false; the work "misleading" in the
Act means that labeling is deceptive if it is such as to
create or lead to a false impression in the mind of the
reader. A "false impression" may result not only from a
false deceptive statement, but may also be instilled in
the mind of the purchaser by ambiguity or
(b) the product is promoted with unsubstantiated claims
of therapeutic value;
(c) If there is any representation that created an
impression of official approval because of the
possession by the firm of an FDA registration number.
Summary
Today’s healthcare market is
replete with super-salesmen with a cloak of new
promotional campaigns that utilize scientific
references.
What sells is not the quality of the product, but the
ability of the marketer to influence their audience.
Even when they realize their treatment method is
unproven, they attempt to minimize this by mentioning
that it has been proven to the satisfaction of the FDA
or one of the recognized medical societies.
The best way to avoid being
taken in is to do your homework when considering new
treatments, and this includes ours. Ask for copies of
all of the published research on the treatment including
clinical and patient-relevant outcomes. Make sure they
substantiate their claims of therapeutic value.
Unfortunately, in today’s health care market separating
the ‘hope’ from the ‘hype’ is no simple task.
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Publications on VAX-D Therapy
Effects of Vertebral Axial Decompression
On Intradiscal Pressure.
Ramos G., MD, Martin W., MD,
Journal of Neurosurgery 81: 350-353, 1994
A Prospective Randomized
Controlled Study of VAX-D and TENS for the Treatment of
Chronic Low Back Pain
Sherry E., MD FRACS, Kitchener P., MB, BS FRANZCR, Smart R.,
MB, Ch.B
Journal of Neurological Research Volume 23, No 7, October 2001
Vertebral Axial Decompression Therapy
for Pain Associated with Herniated or Degenerated Discs or
Facet Syndrome: An Outcome Study
Gose E., Ph.D, Naguszewski W., MD, Naguszewski R., MD,
Journal of Neurological Research, Volume 20, No 3, April 1998.
Dermatosomal
Somatosensory Evoked Potential Demonstration of Nerve Root
Decompression After VAX-D Therapy
Naguszewski W., MD, Naguszewski R., MD, Gose E., Ph.D
Journal of Neurological Research Vol 23 , No 7, October 2001
The Effects of Vertebral Axial
Decompression On Sensory Nerve Dysfunction In Patients with
Low Back Pain and Radiculopathy
Tilaro F., MD, Miskovich D. MD
Canadian Journal of Clinical Medicine Vol. 6, No 1, January
1999
An Overview of Vertebral Axial
Decompression
Tilaro F., MD
Canadian Journal of Clinical Medicine Vol. 5, No 1, January
1998
VAX-D Reduces Chronic Discogenic Low
Back Pain
Odell R., MD. Ph.D, Boudreau D. DO
Anaesthesiology News, Volume 29, Number 3 , March 2003
The Treatment of Discogenic Low Back
Pain: An Integrated Approach (VAX-D- Vertebral Axial
Decompression Therapy)
Tilaro F., MD.
Presentation to the McKenzie North American Conference, June
2-4 2000
The Science of Decompression
Dyer A.E., B.Sc., Phm.B., MD., Ph.D.
The Spine in Health and Disease
The American Association of Orthopaedic Medicine, February
1999
Welcome Relief for Low Back Pain
Stewart J. CBS Health Watch
Reviewed by Beth Israel Deaconess Medical Center (BIDMC),
Harvard Medical School
Back Pain Abhors a Vacuum
Panko R., Best’s Review- Life / Health
A.M. Best Company, Insurance Issues and Analysis, September
1998
Special Report on VAX-D
MTG Newsletter
Medical Technologies Group, Volume 4, Number 8, August 1995
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