Evidence Based Rehab

Degenerative Disc Disease. For many of those that get an unnecessary MRI and get this diagnosis, it's often taken as a death sentence for a back instead of what it is - a normal process related to aging. Although pain can be associated with DDD, it is more often just a radiologic finding. Something that was most likely present before onset of spinal pain and will remain unchanged once the spinal pain recedes.

June's issue of the Journal of Orthopedic & Sports Physical Therapy (JOSPT) includes and excellent commentary on what we know and don't know regarding intervertebral disc degeneration. I would like to summarize some critical points I found in the article.

• Although environmental factors play a role in the incidence and progression of DDD, the strongest predictors are genetically related. It is estimated that 74% of what causes DDD appears related to genetics.
• Smoking and heavy labor have not been supported as etiologic factors in developing DDD. In fact, competitive weight lifters w/o trauma have a lower than expected rate of DDD.
• Primary factor in DDD is reduction of the Intervertebral Disc's (IVD) nutritional capacity.
• "...age-related changes that occur in the composition of the IVD are similar to those observed in articular cartilage and are not necessarily related to pain."
• Vertebral endplate disruptions are being shown to have a strong relationship with DDD.
• Although similar in appearance, there are measurable differences in the diffusion capacity at the vertebral endplate of those IVD's with age-related disc degeneration and symptomatic degnerative discs. This may suggest that aging and degeneration are 2 separate processes.
• "High-Intensity Zones" represented by high intensity T2 signals near the outer margins of the annulus are correlated to pain production with discography (IMO, discography is often painful regardless of pathology) but also commonly found in asymptomatic individuals. This leads to poor specificity and the authors suggest it should not be used in isolation to make clinical decisions.
• The body's attempt to heal annular tears may lead to increasing the area of the disc that is innervated which is further increased by inflammatory byproducts which can lower the threshold needed to trigger pain. The result could be increased sensitivity to otherwise innocuous stimuli. This includes those from just standing and/or walking.
• Even if MRI shows a dramatic disc bulge, this finding is very often not associated with symptoms.
• When nuclear material breaks free and migrates into the vertebral foramen, ipsilateral pain and parasthesia may occur. This results from the chemical response to the nuclear material touching the dorsal root ganglion and not from "pinching" the nerve.

The authors then make some comments on clinical relevance. Here are a few that will lead to a change in the way I treat on Monday:

• Patients with later stage DDD - decreased disc height and hydrostatic nucleus lost - care should be taken during loading progressions, avoiding sustained loading at end range trunk motions.
• Symptoms often occur several hours after trauma to the degenerated disc (DD). Thus, exercise in the gym may go well but in the morning the patient may be too painful to even get out of bed.
• Studies have found favorable outcome in treating DDD with lumbar stabilization exercises.
• It was found that patients with DD who avoided early morning lumbar flexion had significantly less pain and disability then did those who performed lumbar flexibility exercises early in the morning.
• Patients with DD should be encouraged to avoid prolonged flexed compressive forces such as sitting in flexed position.
• Hip ROM limitation can have large effects on loads acting on the lumbar spine.
• The authors make it a point to illustrate the important role the psychological effect that the diagnosis of "degenerative disc disease" has on the patient. they state:
• "...it is important that clinicians carefully communicate with patients to reassure them that DD is a normal aging process; while it certainly can be associated with episodes of pain, only in rare exceptions do these symptoms represent serious disease, and they should not, therefore, prevent one from performing reasonable activities."

It's important to remember the fact DD is related to normal aging. And, thus, it's main treatment should most likely be non-invasive conservative care. And, as I always say, PT's are the experts in this area and well positioned to give the more efficacious care.

Jason L. Harris

Labels: DDD, Degenerative Disc Disease, DRX 9000, evidence based medicine, Low back pain, physical therapy

While I try to stear clear of blogging on the US vs. Them, PT vs. Chiro debate (although my look at the use of the DRX9000 seems to be viewed by chiros as an assault on them), the underhanded way that profession is trying to "claim" manipulation in my state has brought this post out of me.

I want to first comment on how the Chiro profession is handling itself in Nebraska in regards to the PT profession updating our practice act (which dated back to the 1960's IIRC). Their must be respected powerful lobby was threatening to hold up this new legislation because the new act included language about the use of mobilization and manipulation (these are one in the same to the PT profession). "Oh no you don't" the Chiros exclaimed. They pulled out the old very false but effective crap about no having the training or skill to do (hmm, what was that I was learning in PT school then???) High Velocity Low Amplitude (HVLA) manual therapy. And, like PT's always do, we repented and asked the Chiros what we need to do to fix it. "We'll compromise" they offer.

So manipulation was crossed out and "Grade V mobilization" was added (again, in PT, manipulation and mobilization are one in the same). So, the bill is passed (will hold off on the commentary about Orthos objections to the use of "Physical Therapy Diagnosis"; Orthos and Chiros objections to "direct access" even though we've always had it by omission and no one has died - GASP!; and the school systems wanting to bill the government for PT despite providing care with untrained aides). Fast forward a year, and as the new practice act proceeds through it's many steps to fruition - A practice act is just a guideline, and specific rules and regulations need then to be developed from it - Chiros are back shouting "hold on!". We changed our minds, we object to "Grad V mobilization" cuz we say you can't do it. So it's back to expending money, time, energy, and sweat to again fight for what we've already attained. So, the Chiros back off with a knowing smirk of "we'll be back again".

The second item that brought me to write this was a great post by Panda Bear, MD entitled "Stealth Medicine and Other Topics" railing on Chiro's attempt at backdooring into becoming pediatric primary care providers. As Panda Bear quotes them:

“The doctor of chiropractic does not treat conditions or diseases.” Says so right in their mission statement. But then a little further down it ascribes complaints in every system to our old friend the subluxation and promises, by judicious adjustment of the pediatric spine, to allow the body to express a better state of health and well-being.

Imagine that. Promising one thing and practicing the opposite. Sounds familiar to me. Orac at Respectful Insolence and Eric at Evidence In Motion have both commented on a visited this particular post (Damn, I am slow on the uptake I guess). I'll quote Eric as a nice summary to all of this:

For those non-physical therapists reading this, it may be timely to point out that what IS in our scope of practice is all sorts of manipulative therapy. That's right, the specialization area of Orthopaedic Manual Physical Therapy is one where the physical therapist is equipped with both the tools to manipulate the spine or peripheral joints AND develop a comprehensive, integrated program of neuromuscular modalities for orthopaedic conditions.

For an excellent comprehensive look at the history of PT vs Chiro, the arguments analysed and what is most likely behind Chiro's fighting PT's over manipulation (hint: it's not really patient safety. Ok Hint #2: It starts with "M" and ends in "oney") click here.

Labels: APTA, Direct access, DRX 9000, education, manipulation

I
occasionally receive comments from readers. My post on the traction machine called the DRX 9000 is a good example of many different comments left. I have recently began receiving many "Anonymous" posts that attack me directly or are far off subject. Examples being "Anonymous" drawing up arms to have me prosecuted for libel and this most current unpublished one:

Why won't you post all comments?

That is what a blog is for?

You post "under investigation" about your competition, but you won't post factual occurrences about your own profession?

Why would this be?

Please post the recent submission about the "fraud" that has been going on within the Physical Therapy profession.

Must keep an educated and unbiased look at everything :)

Until then, this is just a biased blog toward your own advancements, that is all that it is.

My reply? If you don't have the balls to not post anonymously and do so to attack me or make comments not relative to the original blog post, I will unilaterally reject the comment. I have ok'd every opposing view that stayed on subject.

Oh, and yes, this blog is for my advancement and physical therapy in general advancement. I make no hidden agendas in that right.

Conclusion, stay on subject and I have no problem publishing your comments.

Labels: Chiropractic, Direct access, DRX 9000, physical therapy