Methodological and Application Problems
Associated with Guidelines for Chiropractic Quality Assurance and
Practice Parameters (Mercy Guidelines)
General Disclaimer -- Page iv
On the copyright page, under "general disclaimer," it
is stated, regarding these guidelines, "Adherence to them is
voluntary...The ultimate judgement regarding the propriety of any
specific procedure must be made by the practitioner in light of
the individual circumstances presented by each patient."
Proponents of the Mercy Center document have argued that their
guidelines are "voluntary." The facts betray this claim.
Consider the contents of a letter from the FCLB to the ICA MA
Networker:
Standards have nothing to do with philosophy, and everything
to do with competent practice and protection of the public from
incompetent practitioners...We hope that the various licensing
jurisdictions will use this document in disciplinary cases
involving professional incompetency so that those individuals
are not allowed to continue chiropractic practice.
It is clear that those persons who suggest that these
guidelines are "voluntary" have not heard of FCLBs plan
to encourage their members to de-license as
"incompetent" those doctors whose practices are at
variance with Mercy guidelines. This is extraordinary,
particularly in light of the fact that the Mercy guidelines had
not been distributed to the field for review or revision prior to
release.
Effective Date -- Page iv
It is stated that the "effective date" of the
guidelines is July 1, 1993. If the guidelines are
"voluntary," why is an effective date necessary?
Chairman's Preface -- Page xxi
It is stated, "The captains had the responsibility of
ensuring that all points of view were accurately included in the
final document."
The highly biased and incomplete reviews of literature for
subluxation-based instrumentation betray claims of objectivity.
Furthermore, the guidelines are allopathic in design, and do not
make acceptable provisions for wellness and spinal reconstructive
care. The emphasis is on treating symptoms, not the correction of
subluxations using objective biomechanical and physiological
measurements.
Another questionable statement in the Chairman's preface:
"The document represents the best effort possible by a
representative cross-section of the profession."
The composition of the commission was skewed toward the
allopathic/pain treatment paradigm. The ICA was seriously
underrepresented. The FSCO/SCASA people had but one voting
participant. A seriously underrepresented group was the
subluxation-based field practitioner. Not one ICA radiologist was
on the commission. Individuals conspicuously absent included the
research director of the largest chiropractic college in the
world, and the ICA chiropractic researcher of the year. Also of
concern is that not a single member of the commission was
affiliated with the world's largest chiropractic college.
The Agency for Health Care Policy and Research and the
Development of Clinical Practice Guidelines -- Pages xxvi and
xxvii
Under "establishing guidelines" the author states,
"In the guideline development process, all available
scientific evidence must be considered..." Mercy badly missed
the mark. Selective reviews of literature abound in this document,
particularly in areas relating to the vertebral subluxation
complex.
It is also stated that an important aspect of guideline
development by the Institute of Medicine of the National Academy
of Science is an "open forum." In such a forum,
"...every individual interested in providing oral or written
testimony relevant to the guideline is invited to do so."
This is in sharp contrast to the "rules" of
quasi-secrecy enforced at Mercy. Committee meetings were closed to
observers. Only commissioners, observers, and support staff were
permitted to attend plenary sessions, and only commissioners were
permitted to speak.
The Evolution and Mechanics of a Consensus Process --
Page xxix
This section describes the author's concept of "benefit to
patients." Specifically, "Benefit to Patients' means
outcomes that matter to patients. For patients with back pain,
this means outcomes such as relief of pain and ability to resume
usual activities. It does not mean such outcomes as improvement in
straight-leg raising, or the appearance of lumbosacral
radiographs, or the findings on palpation examination of the
spine."
This statement is in sharp contrast to the concepts expressed
in the AHCPR publication "Healthy People 2000," which
emphasizes preventive strategies, not merely the treatment of
symptoms:
The nation has within its power the ability to save many
lives lost prematurely and needlessly. Implementation of what is
already known about promoting health and preventing disease is
the central challenge of Healthy People 2000."
But Healthy People 2000 challenges the Nation to move beyond
merely saving lives. The health of a people is measured by more
than death rates. Good health comes from reducing unnecessary
suffering, illness, and disability. It comes as well from an
improved quality of life...Healthy People 2000 uses three
approaches; of health promotion, health protection, and
preventive services...it calls on medical and health
professionals to prevent, not just to treat, the diseases and
conditions that result in premature death and chronic
disability."
The vision of AHCPR extends far beyond pain relief and improved
activities of daily living. Preventive strategies have always been
implicit in chiropractic health care. Mercy seems to have
overlooked this.
Introduction and Guide to the Use of These Guidelines
-- Pages xxxvii through xli.
The introduction expresses the observations of David Eddy
stating,
The majority of standard treatments provided by all health
providers for all disorders, whether these disorders be minor or
life-threatening, have not been validated by formal scientific
methodology. Only about 15 percent of medical interventions are
supported by valid evidence and many have never been assessed at
all.
It is obvious that a consensus panel cannot fabricate
non-existent data by taking a vote. It should also be evident that
it is foolish to impose more burdensome criteria on chiropractic
methods than those generally encountered in other healing arts.
Mercy, however, did not choose to play by its own rules. Under
"Procedure Ratings" it is stated, "There must be
one or more controlled trials (Class I evidence) for a Type A
rating of established." This rule applied to Rating System 1.
This was not followed in Chapters 2, 3, 4, 7, 8, and 13, all of
which purported to use Rating System 1. Specifically, in Chapter
2, recommendations 2.1.1, 2.3.1, and 2.4.1 received
"established" ratings in the absence of Class I
evidence. In Chapter 3, recommendations 3.2.1, 3.3.3, 3.4.3,
3.9.1, and 3.9.2 received "established" ratings despite
the absence of Class I evidence. No Class I evidence is cited to
support recommendations 4.1.1, 4.1.2, 4.1.3, 4.1.4, 4.1.5, 4.1.9,
4.1.12, 4.1.13, 4.1.14, 4.2.7, 4.2.8, 4.2.9, and 4.2.25. In
Chapter 7, recommendations 7.1.2, 7.3.3, 7.5.4, and 7.5.5 received
"established" ratings in the absence of Class I
evidence. Recommendation 8.2.1 confers an "established"
rating without Class I evidence. Finally, Chapter 13 provides an
"established" rating for recommendation for 13.1.1 with
only Class III evidence.
Chapter 1, History and Physical Examination
Page 7
The only examination procedures specified "regardless of
chief complaint" are evaluation of pulse rate, blood
pressure, and recording of height and weight." No provision
is apparent for subluxation evaluation in the asymptomatic
patient.
In a somewhat contradictory paragraph, it is stated,
Practitioners may use any on all diagnostic procedures
pertinent to the physical examination, however sophisticated,
dependent on individual training and the legal statutory
framework within which they work.
Could this result in a claim of negligence against a
chiropractor who failed to use "...any or all diagnostic
procedures pertinent to the physical examination, however
sophisticated?" Will such a practitioner be branded
"incompetent" and disciplined by the state board per the
FCLB recommendation?
Chapter 2, Diagnostic Imaging
Page 14 -- Spinography
It is stated that "It is not appropriate to image patients
simply because of clinical uncertainty or prior negative
results." We believe these are excellent reasons to consider
imaging studies.
It is also stated, "There is little documented need to
image patients prior to release from care." This could be
interpreted to limit the appropriateness of "post"
x-rays for those techniques requiring them.
Page 18 -- Spinography
There are devastating remarks concerning spinographic analysis.
Many appear to be based upon the false assumption that x-rays
should somehow reveal patient complaints. The fact that
chiropractors use spinographs for subluxation analysis is not
discussed. Selective reviews of literature cast biomechanical
analysis in a very unfavorable light.
Damaging comments include,
Mensuration and other geometric assessments have been
criticized for their lack of intra-and inter-examiner
reliability, and lack of association to patient
complaints...Correlation of patient complaints of mechanical
pain and objective findings on the plain film radiograph remains
unreliable.
It should be obvious that x-rays are taken for biomechanical
and pathological analysis, not to determine the presence or
absence of pain.
Page 19 -- Full-Spine Radiography
It is stated that full spine radiographs are not appropriate
substitutes for sectional radiographs. This could result in the
need to x-ray the same anatomical region twice in each plane. This
is an obvious abuse of ionizing radiation. This recommendation is
particularly disturbing since it seemingly contradicts the
statement on page 18 that "With proper patient selection and
technical detail, full-spine radiography is safe and
effective."
Page 19 -- Stress Studies
Several comments could be very damaging to doctors using ASBE,
Chiropractic Biophysics, or other techniques which involve stress
studies for biomechanical analysis. It is claimed such studies are
"of limited diagnostic value and no therapeutic
significance."
Pages 19-20 -- Videofluoroscopy
This section contains devastating remarks concerning VF which
could cause serious problems in deposition or trial testimony.
Many are simply untrue, or represent questionable opinions.
It is stated, "Digitization is not considered possible
outside the laboratory at this time." This is untrue, as
commercial digitizing hardware and software are readily available.
Another dubious claim is that "Quantification of normal
has not been adequately defined." This is another example of
a selective literature review, where the works of Fielding, White,
Jackson, Keats, and others are conveniently ignored.
The concluding statement is, "The literature does not
speak strongly for spinal videofluoroscopy as a technique for
clinical use at this time." This does not seem consistent
with an unbiased review of the literature or consideration of the
lower radiation levels possible when videofluoroscopy is used in
lieu of plain stress radiographs.
Chapter 3, Instrumentation
This chapter contains many selective reviews of literature.
Favorable subluxation related research is ignored or discounted.
Furthermore, like Chapter 2, the chapter deviates from the rating
system described earlier in the document. Many criticisms made in
this chapter claim poor "discriminability" but fail to
define the groups to be discriminated. The definition offered
gives the example of "healthy" vs "unhealthy"
patients, but these very nebulous terms remain undefined
throughout the chapter.
Page 40 -- Moiré Topography
It is claimed that "no good correlation to physical
findings exist. Adequate interpretation is therefore
lacking." This conclusion is based upon a selective
literature review, with many key studies ignored.
Page 40 -- Automated Measurements of Posture
It is claimed that these devices are not useful in general
practice. Again, selective literature review seems the basis for
this conclusion, which could be devastating to Metrecom users.
Page 41 -- Thermocouple Devices
These devices are dismissed as "highly doubtful" with
only two references cited. Neither is a chiropractic reference.
Positive works are not cited, including Palmer, Duff, Kale, and
others. The relationship between altered skin temperature patterns
and vertebral subluxation is not explored.
Page 43 -- Surface Electromyography
SEMG is rated "investigational" on the basis of a
highly biased literature review. Again, the straw man of "discriminability"
is paraded before us, and subluxation related applications are not
addressed. Lack of "effectiveness" is claimed, although
the question, "effective for what?" is not addressed.
Favorable Class I evidence (Shambaugh, Ellestad) is ignored. There
are over 290 references on Medline relative to SEMG.
Needle EMG procedures, despite inferior reliability, are rated
"established."
Chapter 4 -- Clinical Laboratory
The role of clinical laboratory procedures in assessing the
effects of the vertebral subluxation complex is not discussed. The
chapter presents an allopathic perspective. Chapter 4 also
deviates from the requirements of Rating System 1, which it
purports to use.
Chapter 5 -- Record Keeping and Patient Consents
No comments.
Chapter 6 -- Clinical Impression
Page 95 -- Definitions
"Analysis" is re-defined without any mention of
subluxation. The definition reads:
The act of separating into component parts the clinical
evaluation of a condition or disease in order to identify the
clinical impression or determine the diagnosis.
Page 96 -- Diagnosis
Although subluxation is mentioned in some of those reports as a
portion of the diagnosis, additional diagnoses are used to
describe the patients or conditions.
This may be interpreted by some to mean that subluxation alone
is not an adequate diagnosis.
Page 97 -- Content
It is stated,
The primary clinical impression, diagnosis, diagnostic
conclusion, or analysis should address the chief complaint
expressed by the patient.
What if there is no chief complaint? What if the patient is
asymptomatic? What about the subluxation?
Chapter 7 -- Modes of Care
Page 104 -- Neuromusculoskeletal Conditions
Differentiates between "type M" and "type
O" disorders. This differentiation may be used to limit or
eliminate our ability to provide chiropractic services to patients
with "type O" disorders; medical referral may also be
required if such conditions exist. This section contains no
mention of the subluxation, or its relationship to either
"Type M" or "Type O" conditions.
Pages 105 and 106 -- Literature Review
Much of the literature presented to support "manipulation
and mobilization" in the treatment of low back pain involved
techniques other than chiropractic adjustment. Furthermore, many
of these studies suffer from serious design flaws. Specifically,
reliable and valid criteria for determining the nature and
appropriateness of the intervention applied are absent (segment,
listing, technique used, etc.) as are criteria to determine
successful application of the manipulative procedure.
An incomplete literature review is provided which presents a
very biased perspective on visceral involvement. Conspicuously
absent is the work of osteopathic researchers, the work of
Pottinger, and findings from the B.J. Palmer Clinic. It is one
thing to criticize the shortcomings of some of these works; it is
quite another to ignore them entirely.
Pages 107 through 112 -- Recommendations
Although the literature review admits, "There is a paucity
of information in the literature comparing one manual approach to
another" (P. 106) ratings differ substantially for different
adjusting procedures and their applications.
It should be noted that this section rates the different
procedures in terms of their applicability to groups of
conditions, not their efficacy in correcting subluxations. This
section is allopathic in perspective and inappropriate to the
practice of subluxation-based chiropractic.
It should be noted that adjustments for other than
neuromusculoskeletal conditions are rated
"investigational" to "equivocal." It should
also be noted that acupuncture received a "promising"
rating. This is a higher rating than that received by many
adjusting procedures. No differentiation of applicability for
neuromusculoskeletal vs. organic disorders is made relative to
acupuncture.
Homeopathic remedies received an "equivocal" rating,
equal to or higher than the ratings received for many adjusting
techniques. No differentiation of applicability for
neuromusculoskeletal vs. organic disorders is made.
It is clear that this section exhibits many shortcomings:
1. The reviews of literature are incomplete and biased.
2. Medical manipulation studies are inappropriately used to
establish a rationale for chiropractic as a treatment for back
pain.
3. Research relating spinal lesions to visceral involvement is
omitted.
4. A more burdensome standard is placed on chiropractic
procedures than homeopathy and acupuncture.
5. Adjusting to correct manifestations of the vertebral
subluxation complex is not addressed.
6. Includes the use of materia medica (drugs) both homeopathic
and allopathic (phonophoresis).
Chapter 8 -- Frequency and Duration of Care
Page 118 -- Adequate Trial of Treatment/Care
This is defined as follows:
A course of two weeks each of two different types of manual
procedures (four weeks total), after which, in the absence of
documented improvement, manual procedures are no longer
indicated.
This is one of the most dangerous statements in the document.
It may have the effect of establishing two to four week
"caps" on chiropractic services. "Documented
improvement" is not defined. However, taken in the general
context of the document, this could mean symptomatic change. The
statement that "manual procedures are no longer
indicated" after such a trial could be used to deny lifetime
benefits after one "unsuccessful" episode.
It is particularly disturbing that this, and other definitions,
were not debated at the Mercy Center Conference.
Page 120 -- Predictions From The Case History and Page 121 --
Passive Care
These sections suggest that most cases responded
"well" within six weeks of intervention, and that those
for whom care beyond six weeks was required, the mean number of
additional sessions required is 3.8. The studies cited are based
upon symptomatic treatment of specific complaints. Reduction of
the manifestations of the vertebral subluxation complex is not
addressed.
Pages 124 and 125 -- Recommendations
Very narrow recommendations are offered which are inconsistent
with what is known about soft tissue injury, prespondylosis, and
hypersensitivity. Reconstructive care is not addressed.
Recommendations are based upon symptomatic relief rather than
spinal correction.
CHAPTER 9 -- Reassessment
Page 133 -- Subluxation Syndrome
The definition offered is:
The clinical signs and symptoms thought to relate to
pathophysiology or dysfunction of spinal motion segments or to
peripheral joints that may be amenable to manipulative/adjustive
procedures.
What are the symptoms of subluxation? This is not defined. The
asymptomatic "subluxation syndrome" is not addressed.
Page 143 -- Literature Review
The document states,
Spinal radiography is used widely as a reassessment tool but
definitive studies on level of appropriateness are lacking.
There is also little scientific evidence to validate many of the
commonly used procedures and tests in neuromuscular diagnosis.
There is even less documentation of validity and reliability
with respect to procedures specific to the manual arts.
Such a statement could be devastating in a deposition or trial.
Conspicuously absent are references to support these very damaging
remarks.
CHAPTER 10 -- Outcome Assessment
Page 142 -- Definitions
The definition of "subluxation syndrome" differs from
that offered in Chapter 9. The definition on page 142 is as
follows:
This term is defined here to mean the clinical signs and
symptoms that relate to pathophysiology or dysfunction of spinal
and pelvic motion segments or to peripheral joints that may be
amenable to manipulative/adjustive procedures.
This definition includes "pelvic motion segments,"
while the definition in Chapter 9 does not.
A very disturbing definition is "Spinal Manipulative
Therapy (SMT):
This term refers to the range of manual care delivered in
chiropractic practice. It includes adjustive, manipulative, and
mobilization procedures.
This downgrades the adjustment to just another
"therapy" used to "treat" the "signs and
symptoms" of a "subluxation syndrome." By lumping
the adjustment together with manipulation and mobilization, the
unique character of this service is lost.
Page 143 -- Functional Outcome Assessments
Broad scope therapeutics is promoted by the following
statement:
This is not to suggest, however, that chiropractic care is
synonymous with spinal manipulative therapy. Chiropractic care
encompasses a wide range of conservative therapeutics.
Page 144 -- Patient Perceptions Outcome Assessments
It is stated:
It makes sense for practitioners to attempt to measure pain as
a way of evaluating the success of their care.
To the chiropractor, however, there are several significant
shortcomings to pain-based models for outcome assessment:
1. Such schemes assume that the objective of chiropractic care
is symptomatic treatment of pain.
2. Pain is a highly subjective, private sensation which cannot
be directly measured or observed.
3. In some instances, unless the pain is robust enough to
restrict activities of daily living, a "false negative"
could result.
4. Pain criteria cannot be applied if the patient has symptoms
other than pain, or no symptoms at all.
5. Pain criteria are useless in the evaluation of asymptomatic
patients undergoing maintenance or reconstructive care.
Pain is not a reliable and valid indicator of vertebral
subluxation. Despite this, Chapter 10 disparages objective outcome
assessments which measure manifestations of the vertebral
subluxation complex.
Page 146 -- Thermography
Devastating remarks are made concerning thermography. Absent is
the work of many distinguished investigators. This is another
example of an incomplete, biased review of literature.
Page 147 -- Posture
A grossly incomplete review which downplays the importance of
posture in health. The reader is referred to the review by M.E.
Jenness in NINCDS Monograph No. 15 to gain a perspective on how
inadequate and potentially misleading the review on page 147 of
Mercy is.
Page 148 -- Vertebral Position
A study by a psychologist is cited which states,
One study (Keating, 1990) found no reliability of palpation
for misalignment of vertebrae. There are no clinical trial
outcomes studies using palpation of bony landmarks as indicators
of misalignment.
Such a comment could be very damaging to doctors who employ
palpation.
Page 148 -- Abnormal Spinal Segmental Motion/Lack of Joint
Endplay
It is stated,
Haas and Nyiendo (1990, 1991) have questioned the validity
and reliability of lateral lumbar bending radiographs for
patients with low-back pain. There does not seem to be a greater
prevalence of "abnormal" findings in persons with a
history of back pain compared to those without back pain.
How can one expect to evaluate pain on a radiograph? It is not
possible to discriminate between a living patient and a fresh
corpse on spinal radiographs, either! X-rays are taken to evaluate
biomechanics and pathology, not to measure pain.
Page 149 -- Asymmetric or Hypertonic Muscle Contraction
A selective, highly biased review of literature is presented.
SEMG is attacked on the basis of claims that are not made by
subluxation based chiropractors. Specifically, as a test of motor
activity, it can hardly be expected to discriminate between pain
and non-pain populations. It is also claimed that "There is
very little standardization of examination procedures at this
time." However, literature describing standardized protocol
is not cited.
Pages 151 and 152 -- Thermography
It is stated,
There is very little scientific data to support the
responsiveness of thermographic measurements to changes in
health status.
Thermography is rated "Investigational to equivocal as an
outcome assessment for patients with neuromusculoskeletal
conditions."
In Chapter 3, thermography is rated
"equivocal/promising."
Page 152 -- Vertebral Position Assessed Radiographically
The rating in this chapter is "equivocal," although
Chapter 2 rates plain radiography for biomechanical assessment
"promising." (Page 27)
Page 152 -- Asymmetric Segmental Motion Assessed
Radiographically
The rating in this chapter is "investigational,"
while Chapter 2 rates videofluoroscopy for kinematic and other
biomechanical purposes "promising." (Page 27)
Page 152 --Asymmetric or Hypertonic Muscle Contraction
Fixed electrode SEMG is rated "equivocal" as an
outcome assessment for patients with neuromusculoskeletal
conditions.
Scanning EMG is rated "investigational to equivocal"
as an outcome assessment for patients with neuromusculoskeletal
conditions.
These are inconsistent with the ratings in Chapter 3.
Chapter 11 -- Collaborative Care
No comments.
Chapter 12 -- Contraindications and Complications
GENERAL
This Chapter was substantially changed in editing. All
references to probability have been wisely deleted. However, one
must question whether ratings and recommendations can be deleted
by editors without convening a conference of the original
commissioners.
Page 169 -- Joint Dysfunction
The definition offered lumps subluxation in this category
without regard for the neurological component or adjustment:
Joint Dysfunction (manipulable lesion, subluxation, functional
spinal lesion): Decreased or aberrant joint mobility for which
manipulation is indicated. In this context the term excludes
states of hypermobility of instability.
Pages 173 through 175 -- Recommendations
The paucity of case reports makes it difficult to assess the
relative risk of chiropractic adjustments under various
circumstances. Many of the complications reported following
"manipulations" did not involve adjustments administered
by chiropractors.
Although less harmful than the original manuscript, this
chapter fails to differentiate complications arising from
adjustments administered by chiropractors and complications
following other manipulative procedures administered by
non-chiropractors.
Chapter 13 -- Preventive/Maintenance Care and Public
Health
Page 183 -- Use of Chiropractic Adjustments
The rating given is "equivocal." Acupuncture and
physical therapy modalities fared far better in Chapter 7.
Page 183 -- Wellness Care
This is also rated "equivocal."
CHAPTER 14 -- Professional development
No comments.
EPILOGUE
Page 194 -- Future Consensus Conferences
The document states,
It is unlikely that any substantial revision of these
guidelines will occur and be sponsored by a credible portion of
the profession within the next two or three years.
Thus, the damaging precedents set by these guidelines will be
with us for a long time.
It is admitted,
It was not possible to address each area of practice in the
degree of detail which may be desirable.
Indeed, we have disclosed areas where incomplete, biased,
unchallenged reviews of literature were used to disparage the
subluxation concept and the technologies for evaluating
manifestations of the vertebral subluxation complex.
In the closing paragraph, the following statement is made:
At no time, however, must political considerations be allowed
to supersede basic scientific principles and health care ethics.
This is an admirable statement. Unfortunately, the shortcomings
of this document preclude acceptance by the profession as a whole.
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