La. Admin. Code tit. 40 § I-2019

Current through Register Vol. 50, No. 9, September 20, 2024

Section I-2019 - Follow-Up Diagnostic Imaging and Testing Procedures

A. One diagnostic imaging or testing procedure may provide the same or distinctive information as does another procedure. Therefore, prudent choice of a single diagnostic procedure, a complement of procedures, or a sequence of procedures will optimize diagnostic accuracy; and maximize cost effectiveness (by avoiding redundancy), and minimize potential adverse effects to patients. All imaging and testing procedures have a degree of specificity and sensitivity for various diagnoses. No isolated imaging test can assure a correct diagnosis.

B. Clinical information obtained by history taking and physical examination should form the basis for selecting an imaging procedure and interpreting its results. Clinical updates must demonstrate the patient's current status to document the need for diagnostic testing or additional treatment. A brief history, changes in clinical findings such as orthopedic and neurological tests, and measurements of function with emphasis on the current, specific physical limitations will be important when seeking approval of future care. The emphasis of the medical treatment schedule are that the determination of the need to continue treatment is based on functional improvement, and that the patient's ability (current capacity) to return to work is needed to assist in disability management.

C. Magnetic resonance imaging (MRI), myelography, or computed axial tomography (CT) scanning following myelography, and other imaging procedures and testing may provide useful information for many spinal disorders. When a diagnostic procedure, in conjunction with clinical information, can provide sufficient information to establish an accurate diagnosis, the second diagnostic procedure will become a redundant procedure. At the same time, a subsequent diagnostic procedure can be a complementary diagnostic procedure if the first or preceding procedures, in conjunction with clinical information, cannot provide an accurate diagnosis. Usually, preference of a procedure over others depends upon availability, a patient's tolerance, and/or the treating practitioner's familiarity with the procedure. Subsequent MRI may be indicated with a change in neurological exam, change in symptoms or a contemplated surgical intervention.

1. Imaging studies are generally accepted, well-established and widely used diagnostic procedures. In the absence of myelopathy, or neurological changes, or history of cancer, imaging usually is not appropriate until conservative therapy has been tried and failed. Six to eight weeks of treatment are usually an adequate period of time before an imaging procedure is in order, but the clinician should use judgment in this regard. When indicated, imaging studies can be utilized for further evaluation of the low back, based upon the mechanism of injury, symptoms, and patient history. Prudent choice of a single diagnostic procedure, a complementary combination of procedures, or a proper sequential order of complementary procedures will help ensure maximum diagnostic accuracy and minimize adverse effect to the patient. When the findings of the diagnostic imaging and testing procedures are not consistent with the clinical examination, the clinical findings should have preference. There is good evidence that in the asymptomatic population, disc bulges, annular tears, or high intensity zone areas, and disc height loss are prevalent 40 to 60 percent of the time depending on the condition, study, and age of the patient. Therefore, the existence of these anatomic findings should not be considered relevant without physiologic and clinical correlation in an individual patient. The studies below are listed in frequency of use, not importance:

a. Magnetic Resonance Imaging (MRI) is rarely indicated in patients with non-traumatic acute low back pain with no neuropathic signs or symptoms. It is generally the first follow-up imaging study in individuals who respond poorly to proper initial conservative care. MRI is useful in suspected nerve root compression, myelopathy, masses, infections, metastatic disease, disc herniation, annular tear, and cord contusion or severe incapacitating pain. MRI is contraindicated in patients with certain implants.

i. In general, the high field, conventional, MRI provides better resolution. A lower field scan may be indicated when a patient cannot fit into a high field scanner or who is too claustrophobic despite sedation. Inadequate resolution on the first scan may require a second MRI using a different technique. All questions in this regard should be discussed with the MRI center and/or radiologist.

ii. Specialized MRI Scans

(a). MRI with three-dimensional reconstruction. On rare occasions, MRI with three-dimensional reconstruction views may be used as a pre-surgical diagnostic procedure to obtain accurate information of characteristics, location, and spatial relationships among soft tissue and bony structures.

(b). Dynamic-kinetic MRI of the spine. Dynamic-kinetic MRI of the spine uses an MRI unit configured with a top-front open design which enables upright, weight-bearing patient positioning in a variety of postures not obtainable with the recumbent images derived from conventional, closed unit MRI systems. Imaging can be obtained in flexion, extension, and rotation of the spine, as well as in erect positioning. There is a theoretical advantage to imaging sequences obtained under more physiologic conditions than in the supine position. There is currently ongoing research to establish whether the theoretical advantages of positional and kinetic MRI result in improved sensitivity and specificity in detecting spine pathology. Currently it remains investigational and is not recommended until the correlation with clinical syndromes and outcomes is firmly established.

b. Computed Axial Tomography (CT) provides excellent visualization of bone and is used to further evaluate bony masses and suspected fractures not clearly identified on radiographic evaluation. It may sometimes be done as a complement to MRI scanning to better delineate bony osteophyte formation in the neural foramen. Instrument-scatter reduction software provides better resolution when metallic artifact is of concern.

c. Post-Fusion Patients-monitoring of fusion can be done with initial x-rays within the first few weeks after surgery. Then, x-rays every three months up to a year. CT scan or X-rays can be done at one year to assess for fusion.

d. Myelography is the injection of radiopaque material into the spinal subarachnoid space, with x-rays then taken to define anatomy. It may be used as a diagnostic procedure to obtain accurate information of characteristics, location, and spatial relationships among soft tissue and bony structures. Myelography is an invasive procedure with complications including nausea, vomiting, headache, convulsion, arachnoiditis, cerebral-spinal fluid (CSF) leakage, allergic reactions, bleeding, and infection. Therefore, myelography should only be considered when CT and MRI are unavailable, for morbidly obese patients or those who have undergone multiple operations, and when other tests prove non-diagnostic. The use of small needles and a less toxic, water-soluble, nonionic contrast is recommended.

e. CT Myelogram provides more detailed information about relationships between neural elements and surrounding anatomy and is appropriate in patients with multiple prior operations or tumorous conditions.

f. Single Photon Emission Computerized Tomography (SPECT). A scanning technique which may be helpful to localize facet joint pathology and is useful in determining which patients are likely to have a response to facet injection. SPECT combines bone scans & CT Scans in looking for facet joint pathology.

g. Bone Scan (Radioisotope Bone Scanning) is generally accepted, well-established, and widely used. Bone scanning is more sensitive but less specific than MRI. 99mTechnetium diphosphonate uptake reflects osteoblastic activity and may be useful in diagnosing metastatic/primary bone tumors, stress fractures, osteomyelitis, and inflammatory lesions, but cannot distinguish between these entities.

h. Other Radioisotope Scanning: Indium and gallium scans are generally accepted, well-established, and widely used procedures usually to help diagnose lesions seen on other diagnostic imaging studies. 67Gallium citrate scans are used to localize tumor, infection, and abscesses. 111Indium-labeled leukocyte scanning is utilized for localizing infection or inflammation.

i. Dynamic [Digital] Fluoroscopy: Dynamic [Digital] Fluoroscopy of the lumbar spine measures the motion of intervertebral segments using a videofluoroscopy unit to capture images as the subject performs lumbar flexion and extension, storing the anatomic motion of the spine in a computer. Currently it is not recommended for use in the diagnosis of lumbar instability, since there is limited information on normal segmental motion for the age groups commonly presenting with low back pain, and diagnostic criteria for specific spinal conditions are not yet defined. No studies have yet demonstrated predictive value in terms of standard operative and non-operative therapeutic outcomes.

2. Other Tests. The following diagnostic procedures in this subsection are listed in alphabetical order, not by importance:

a. Electrodiagnostic Testing

i. Electromyography (EMG), Nerve Conduction Studies (NCS) These are generally accepted, well-established and widely used diagnostic procedures. EMG and NCS, when performed and interpreted by a trained physician/electrophysiologist, may be useful for patients with suspected neural involvement whose symptoms are persistent or unresponsive to initial conservative treatments. They are used to differentiate peripheral neural deficits from radicular and spinal cord neural deficits and to rule out concomitant myopathy. However, F-Wave Latencies are not diagnostic for radiculopathy.

(a). In general, EMG and NCS are complementary to imaging procedures such as CT, MRI, and/or myelography or diagnostic injection procedures. Electrodiagnostic studies may provide useful, correlative neuropathophysiological information that would be otherwise unobtainable from the radiologic studies discussed above.

ii. Portable Automated Electrodiagnostic Device (also known as Surface EMG) is not a substitute for conventional diagnostic testing in clinical decision-making, and therefore, is not recommended.

iii. Somatosensory Evoked Potential (SSEP) is not recommended to identify radiculopathy. It may be used to evaluate myelopathy and other rare neurological disorders such as neurogenic bladder and sexual dysfunction.

iv. Current Perception Threshold (CPT) Evaluation may be useful as a screening tool, but its diagnostic efficacy in the evaluation of industrial low back pain has not been determined. Therefore, CPT is not recommended as a diagnostic tool.

v. Large Array Surface Electromyography measures low back muscle activity using a fixed array of 63 electrodes arranged in nine rows and seven columns between the seventh thoracic spinous process and the iliac crest. The array simultaneously collects myoelectric data from multifidus, iliocostalis, quadratus lumborum, and other lumbar muscles, which is analyzed for patterns of activity in these muscle groups. It is used in researching physiologic changes and adaptations to back pain, but is not recommended as a diagnostic procedure for individuals with back pain due to a lack of interpretive standards.

vi. Surface EMG in combination with Range of Motion and/or Functional Capacity Evaluation. This is designed to detect differences between persons with and without low back pain, measuring signals in lumbar flexion which show that painful paraspinal muscles fail to relax fully. It may show aspects of the pathophysiology of muscle activity which advance the scientific understanding of low back pain. The test also purports to determine the significance of disc pathology and the age of an injury. It has not been evaluated in a setting which tests a spectrum of patients commonly seen in clinical practice, using an interpretation which is tested against a diagnostic reference standard. Therefore, it is not suitable as a diagnostic test for low back pain and its use for this purpose is not recommended.

b. Injections-Diagnostic

i. Spinal Diagnostic Injections. Diagnostic spinal injections are commonly used in patients and they usually have been performed previously in the acute or subacute stage. They may rarely be necessary for aggravations of low back pain. Refer to the OWCA Low Back Pain Medical Treatment Guideline for indications.

ii. Diagnostic peripheral nerve blocks such as medial branch facet nerves (lumbar), sacral lateral branches of sacroiliac joints, selective nerve root blocks and transforaminal epidural injections and other pure sensory nerves suspected of causing pain, also include diagnostic facet joint injection as a diagnostic block. Images are required to be saved to verify needle placement.

iii. Medial branch facet blocks (lumbar, indicated if there is demonstration of tenderness over the facet joints or pain on the facet loading maneuvers,) and sacral lateral branch blocks, if provide 80 percent or more pain reduction as measured by a numerical pain index scale within one hour of the medial branch blocks up to three levels per side, then rhizotomy of the medial branch nerves, up to four nerves per side, may be done without confirmation block. If the initial set of medial branch blocks provides less than 80 percent but at least 50 percent pain reduction as measured by a numerical pain index scale or documented functional improvement, the medial branch block should be repeated for confirmation before a rhizotomy is performed. If 50 percent or greater pain reduction is achieved as measured by the NPIS with two sets of medial branch blocks for facet joint pain, then rhizotomy may be performed. Images are required to be saved to verify needle placement.

iv. In general, relief should last for at least the duration of the local anesthetic used and should significantly result in functional improvement and relief of pain. Refer to Injections-Spinal Therapeutic for information on other specific therapeutic injections.

(a). Description. Diagnostic spinal injections are generally accepted, well-established procedures. These injections may be useful for localizing the source of pain, and may have added therapeutic value when combined with injection of therapeutic medication(s). Each diagnostic injection has inherent risks, and risk versus benefit should always be evaluated when considering injection therapy.

(b). Indications. Since these procedures are invasive, less invasive or non-invasive procedures should be considered first. Selection of patients, choice of procedure, and localization of the level for injection should be determined by clinical information indicating strong suspicion for pathologic condition(s) and the source of pain symptoms. Because injections are invasive with an inherent risk, the number of diagnostic procedures should be limited in any individual patient to those most likely to be primary pain generators. Patients should not receive all of the diagnostic blocks listed merely in an attempt to identify 100 percent of the pain generators.

(c). The interpretation of the test results are primarily based on functional change, symptom report, and pain response (via a recognized pain scale), before and at an appropriate time period after the injection. The diagnostic significance of the test result should be evaluated in conjunction with clinical information and the results of other diagnostic procedures. Injections with local anesthetics of differing duration may be used to support a diagnosis. In some cases, injections at multiple levels may be required to accurately diagnose low back pain.

(i). It is obligatory that sufficient data be accumulated by the examiner performing this procedure such that the diagnostic value of the procedure be evident to other reviewers. This entails, at a minimum, documentation of patient response immediately following the procedure with details of any symptoms with a response and the degree of response. Responses must be identified as to specific body part (e.g., low back, leg pain). The practitioner must identify the local anesthetic used and the expected duration of response for diagnostic purposes.

(ii). Multiple injections provided at the same session without staging may seriously dilute the diagnostic value of these procedures. Practitioners must carefully weigh the diagnostic value of the procedure against the possible therapeutic value.

(d). Special Requirements for Diagnostic Injections. Since multi-planar fluoroscopy during procedures is required to document technique and needle placement, an experienced physician should perform the procedure. Permanent images are required to verify needle placement. The subspecialty disciplines of the physicians performing the injections may be varied, including, but not limited to: anesthesiology, radiology, surgery, neurology or physiatry. The practitioner should document hands-on training through workshops and/or completed fellowship training with interventional training. They must also be knowledgeable in radiation safety.

(e). Complications. General complications of diagnostic injections may include transient neurapraxia, nerve injury, infection, headache, urinary retention, and vasovagal effects, as well as epidural hematoma, permanent neurologic damage, dural perforation, and CSF leakage, and spinal meningeal abscess. Permanent paresis, anaphylaxis, and arachnoiditis have been rarely reported with the use of epidural steroids.

(f). Contraindications

(i). Absolute contraindications to diagnostic injections include: bacterial infection-systemic or localized to region of injection; bleeding diatheses; hematological conditions; and possible pregnancy;

(ii). Relative contraindications to diagnostic injections may include: allergy to contrast, poorly controlled diabetes mellitus and hypertension;

(iii). Drugs affecting coagulation may require restriction from use. Anti-platelet therapy and anticoagulations should be addressed individually by a knowledgeable specialist. It is recommended to refer to the American Society of Regional Anesthesia for anticoagulation guidelines.

(g). Specific Diagnostic Injections. In general, relief should last for at least the duration of the local anesthetic used and should significantly relieve pain and result in functional improvement. Refer to "Injections -Therapeutic" for information on specific therapeutic injections.

(i). Lumbar Medial Branch Facet Blocks and Sacral Lateral Branch Blocks. If the block provides 80 percent or more pain reduction as measured by a numerical pain index scale within one hour of the medial branch blocks up to three levels per side, then rhizotomy of the medial branch nerves, up to four nerves per side, may be done without confirmation block. If the initial set of medial branch blocks provides less than 80 percent but at least 50 percent pain reduction as measured by a numerical pain index scale or documented functional improvement, the medial branch block should be repeated for confirmation before a rhizotomy is performed. If 50 percent or greater pain reduction is achieved as measured by the NPIS with two sets of medial branch blocks for facet joint pain, then rhizotomy may be performed.

[a]. Frequency and Maximum Duration: May be repeated once for comparative blocks. Limited to four levels

(ii). Transforaminal injections/spinal selective nerve block (SSNB) are generally accepted and useful in identifying spinal pathology. When performed for diagnosis, small amounts of local anesthetic up to a total volume of 1.0 cc should be used to determine the level of nerve root irritation. A positive diagnostic block should result in a positive diagnostic functional benefit and a 50 percent reduction in nerve-root generated pain appropriate for the anesthetic used as measured by accepted pain scales (such as a VAS).

[a]. Time to Produce Effect: less than 30 minutes for local anesthesia; corticosteroids up to 72 hours for most patients.

[b]. Frequency and Maximum Duration: once per suspected level. Limited to two levels

(iii). Zygapophyseal (Facet) Blocks. Facet blocks are generally accepted but should not be considered diagnostic blocks for the purposes of determining the need for a rhizotomy (radiofrequency medial branch neurotomy), nor should they be done with medial branch blocks. These blocks should not be considered a definitive diagnostic tool. They may be used diagnostically to direct functional rehabilitation programs. A positive diagnostic block should result in a positive diagnostic functional benefit and a 50 percent reduction in pain appropriate for the anesthetic used as measured by accepted pain scales (such as a VAS). They then may be repeated per the therapeutic guidelines when they are accompanied by a functional rehabilitation program. (Refer to Therapeutic Spinal Injections).

[a]. Time to Produce Effect: Less than 30 minutes for local anesthesia; corticosteroids up to 72 hours for most patients;

[b]. Frequency and Maximum Duration: Once per suspected level, limited to two levels.

(iv). Sacroiliac Joint Injection. A generally accepted Injection of local anesthetic in an intra-articular fashion into the sacroiliac joint under fluoroscopic guidance. Long-term therapeutic effect has not yet been established. Indications: Primarily diagnostic to rule out sacroiliac joint dysfunction versus other pain generators. Intra-articular injection can be of value in diagnosing the pain generator. There should be documented relief from previously painful maneuvers (e.g., Patrick's test) and at least 50 percent pain relief on post-injection physical exam (as measured by accepted pain scales such as a VAS) correlated with functional improvement. Sacroiliac joint blocks should facilitate functionally directed rehabilitation programs.

[a]. Time to Produce Effect: Up to 30 minutes for local anesthetic;

[b]. Frequency and Maximum Duration: 1.

c. Personality/ Psychological/ Psychiatric/ Psychosocial Evaluation. These are generally accepted and well-established diagnostic procedures with selective use in the low back population, but have more widespread use in subacute and chronic low back populations. Diagnostic testing procedures may be useful for patients with symptoms of depression, delayed recovery, chronic pain, recurrent painful conditions, disability problems, and for preoperative evaluation. Psychological/psychiatric /psychosocial and measures have been shown to have predictive value for postoperative response, and therefore should be strongly considered for use pre-operatively when the surgeon has concerns about the relationship between symptoms and findings, or when the surgeon is aware of indications of psychological complication or risk factors for psychological complication (e.g. childhood psychological trauma). Psychological testing should provide differentiation between pre-existing conditions versus injury caused psychological conditions, including depression and posttraumatic stress disorder. Psychological testing should incorporate measures that have been shown, empirically, to identify comorbidities or risk factors that are linked to poor outcome or delayed recovery.

i. Formal psychological or psychosocial evaluation should be performed on patients not making expected progress within 6 to 12 weeks following injury and whose subjective symptoms do not correlate with objective signs and test results. In addition to the customary initial exam, the evaluation of the injured worker should specifically address the following areas:

(a). employment history;

(b). interpersonal relationships-both social and work;

(c). patient activities;

(d). current perception of the medical system;

(e). current perception/attitudes toward employer/job;

(f). results of current treatment;

(g). risk factors and psychological comorbidities that may influence outcome and that may require treatment;

(h). childhood history, including history of childhood psychological trauma, abuse and family history of disability.

(i). childhood history, including history of childhood psychological trauma, abuse and family history of disability;

ii. Personality/ psychological/ psychiatric / psychosocial evaluations consist of two components, clinical interview and psychological testing. Results should help clinicians with a better understanding of the patient in a number of ways. Thus, the evaluation result will determine the need for further psychosocial interventions; and in those cases, Diagnostic and Statistical Manual of Mental Disorders (DSM) diagnosis should be determined and documented. The evaluation should also include examination of both psychological comorbidities and psychological risk factors that are empirically associated with poor outcome and/or delayed recovery. An individual with a Ph.D., Psy.D, or psychiatric M.D./D.O. credentials should perform initial evaluations, which are generally completed within one to two hours. A professional fluent in the primary language of the patient is preferred. When such a provider is not available, services of a professional language interpreter should be provided.

(a). Frequency: one-time visit for the clinical interview. If psychometric testing is indicated as a part of the initial evaluation, time for such testing should not exceed an additional nine hours of professional time.

(b). Clinical Evaluation. At the discretion of the evaluating physician, clinical evaluation may address the following areas:

(i). History of Injury. The history of the injury should be reported in the patient's words or using similar terminology. Caution must be exercised when using translators.

[a]. nature of injury;

[b]. psychosocial circumstances of the injury;

[c]. current symptomatic complaints;

[d]. extent of medical corroboration;

[e]. treatment received and results;

[f]. compliance with treatment;

[g]. coping strategies used, including perceived locus of control;

[h]. perception of medical system and employer;

[i]. history of response to prescription medications.

(ii). Health History

[a]. nature of injury;

[b]. medical history;

[c]. psychiatric history;

[d]. history of alcohol or substance abuse;

[e]. activities of daily living;

[f]. mental status exam;

[g]. previous injuries, including disability, impairment, and compensation

(iii). Psychosocial History

[a]. childhood history, including abuse;

[b]. educational history;

[c]. family history, including disability;

[d]. marital history and other significant adulthood activities and events;

[e]. legal history, including criminal and civil litigation;

[f]. employment and military history;

[g]. signs of pre-injury psychological dysfunction;

[h]. current interpersonal relations, support, living situation;

[i]. financial history.

(iv). Psychological test results, if performed.

(v). Danger to self or others.

(vi). Current psychiatric diagnosis consistent with the standards of the American Psychiatric Association's Diagnostic and Statistical Manual of Mental Disorders.

(vii). Pre-existing psychiatric conditions. Treatment of these conditions is appropriate when the preexisting condition affects recovery from pain.

(viii). Causality (to address medically probable cause and effect, distinguishing pre-existing psychological symptoms, traits and vulnerabilities from current symptoms).

(ix). Treatment recommendations with respect to specific goals, frequency, timeframes, and expected outcomes.

(c). Tests of Psychological Functioning. Psychometric testing is a valuable component of a consultation to assist the physician in making a more effective treatment plan. Psychometric testing is useful in the assessment of mental conditions, pain conditions, cognitive functioning, treatment planning, vocational planning, and evaluation of treatment effectiveness. There is no general agreement as to which standardized psychometric tests should be specifically recommended for psychological evaluations of pain conditions. It is appropriate for the mental health provider to use their discretion and administer selective psychometric tests within their expertise and within standards of care in the community. Some of these tests are available in Spanish and other languages, and many are written at a sixth grade reading level. Examples of frequently used psychometric tests performed include, but not limited to, the following.

(i). Comprehensive Inventories for Medical Patients

[a]. Battery for Health Improvement, 2nd Edition (BHI-2). What it measures: depression, anxiety and hostility; violent and suicidal ideation; borderline, dependency, maladjustment, substance abuse, conflicts with work, family and physician, pain preoccupation, somatization, perception of functioning and others. Benefits: when used as a part of a comprehensive evaluation, can contribute substantially to the understanding of psychosocial factors underlying pain reports, perceived disability, somatic preoccupation, and help to design interventions. Serial administrations can track changes in a broad range of variables during the course of treatment, and assess outcome.

[b]. Millon Behavioral Medical Diagnostic (MBMD). What it measures - updated version of the Millon Behavioral Health Inventory (MBHI). Provides information on coping styles (introversive, inhibited, dejected, cooperative, sociable, etc), health habits (smoking, drinking, eating, etc.), psychiatric indications (anxiety, depression, etc), stress moderators (illness apprehension vs. illness tolerance, etc), treatment prognostics (interventional fragility vs. interventional resilience, medication abuse vs. medication competence, etc) and other factors. Benefits: when used as a part of a comprehensive evaluation, can contribute substantially to the understanding of psychosocial factors affecting medical patients. Understanding risk factors and patient personality type can help to optimize treatment protocols for a particular patient.

[c]. Pain Assessment Battery (PAB). What it measures: collection of four separate measures that are administered together. Emphasis on the assessment of pain, coping strategies, degree and frequency of distress, health-related behaviors, coping success, beliefs about pain, quality of pain experience, stress symptoms analysis, and others. Benefits: when used as a part of a comprehensive evaluation, can contribute substantially to the understanding of patient stress, pain reports and pain coping strategies, and help to design interventions. Serial administrations can track changes in measured variables during the course of treatment, and assess outcome.

(d). Comprehensive Psychological Inventories. These tests are designed for detecting various psychiatric syndromes, but in general are more prone to false positive findings when administered to medical patients.

(i). Millon Clinical Multiaxial Inventory, 3rd Edition (MCMI-III). What it measures: has scales based on DSM diagnostic criteria for affective, personality, and psychotic disorders and somatization. Benefits: when used as a part of a part of a comprehensive evaluation, can screen for a broad range of DSM diagnoses.

(ii). Minnesota Multiphasic Personality Inventory, 2nd Edition (MMPI-2). What it measures: original scale constructs, such as hysteria and psychesthenia are archaic but continue to be useful. Newer content scales include depression, anxiety, health concerns, bizarre mentation, social discomfort, low self-esteem, and almost 100 others. Benefits: when used as a part of a comprehensive evaluation, measure a number of factors that have been associated with poor treatment outcome.

(iii). Personality Assessment Inventory (PAI). What it measures: a good measure of general psychopathology. Measures depression, anxiety, somatic complaints, stress, alcohol and drug use reports, mania, paranoia, schizophrenia, borderline, antisocial, and suicidal ideation and more than 30 others. Benefits: when used as a part of a comprehensive evaluation, can contribute substantially to the identification of a wide variety of risk factors that could potentially affect the medical patient.

(e). Brief Multidimensional Screens for Medical Patients. Treating providers, to assess a variety of psychological and medical conditions, including depression, pain, disability and others, may use brief instruments. These instruments may also be employed as repeated measures to track progress in treatment, or as one test in a more comprehensive evaluation. Brief instruments are valuable in that the test may be administered in the office setting and hand scored by the physician. Results of these tests should help providers distinguish which patients should be referred for a specific type of comprehensive evaluation.

(i). Brief Battery for Health Improvement, 2nd Edition (BBHI-2). What it measures: depression, anxiety, somatization, pain, function, and defensiveness. Benefits: can identify patients needing treatment for depression and anxiety, and identify patients prone to somatization, pain magnification and self-perception of disability. Can compare the level of factors above to other pain patients and community members. Serial administrations can track changes in measured variables during the course of treatment, and assess outcome.

(ii). Multidimensional Pain Inventory (MPI). What it measures: interference, support, pain severity, life-control, affective distress, response of significant other to pain, and self-perception of disability at home and work, and in social and other activities of daily living. Benefits: can identify patients with high levels of disability perceptions, affective distress, or those prone to pain magnification. Serial administrations can track changes in measured variables during the course of treatment, and assess outcome.

(iii). Pain Patient Profile (P3). What it measures: Assesses depression, anxiety, and somatization. Benefits: Can identify patients needing treatment for depression and anxiety, as well as identify patients prone to somatization. Can compare the level of depression, anxiety and somatization to other pain patients and community members. Serial administrations can track changes in measured variables during the course of treatment, and assess outcome.

(iv). SF-36. What it measures: a survey of general health well-being and functional states. Benefits: assesses a broad spectrum of patient disability reports. Serial administrations could be used to track patient perceived functional changes during the course of treatment, and assess outcome.

(v). Sickness Impact Profile (SIP). What it measures: perceived disability in the areas of sleep, eating, home management, recreation, mobility, body care, social interaction, emotional behavior, and communication. Benefits: assesses a broad spectrum of patient disability reports. Serial administrations could be used to track patient perceived functional changes during the course of treatment, and assess outcome.

(vi). McGill Pain Questionnaire (MPQ). What it measures: cognitive, emotional and sensory aspects of pain. Benefits: can identify patients prone to pain magnification. Repeated administrations can track progress in treatment for pain.

(vii). McGill Pain Questionnaire-Short Form (MPQ-SF). What it measures: emotional and sensory aspects of pain. Benefits: can identify patients prone to pain magnification. Repeated administrations can track progress in treatment for pain.

(viii). Oswestry Disability Questionnaire. What it measures: disability secondary to low back pain. Benefits: can measure patients' self-perceptions of disability. Serial administrations could be used to track changes in self-perceptions of functional ability during the course of treatment, and assess outcome.

(ix). Visual Analog Scales (VAS). What it measures: graphical measure of patient's pain report. Benefits: quantifies the patients' pain report. Serial administrations could be used to track changes in pain reports during the course of treatment and assess outcome.

(f). Brief Multidimensional Screens for Psychiatric Patients. These tests are designed for detecting various psychiatric syndromes, but in general are more prone to false positive findings when administered to medical patients.

(i). Brief Symptom Inventory. What it measures: Somatization, obsessive-compulsive, depression, anxiety, phobic anxiety, hostility, paranoia, psychoticism, and interpersonal sensitivity. Benefits: can identify patients needing treatment for depression and anxiety, as well as identify patients prone to somatization. Can compare the level of depression, anxiety, and somatization to community members. Serial administrations could be used to track changes in measured variables during the course of treatment, and assess outcome.

(ii). Brief Symptom Inventory-18 (BSI-18). What it Measures: depression, anxiety, somatization. Benefits: can identify patients needing treatment for depression and anxiety, as well as identify patients prone to somatization. Can compare the level of depression, anxiety, and somatization to community members. Serial administrations could be used to track patient perceived functional changes during the course of treatment, and assess outcome.

(iii). Symptom Check List 90 (SCL 90). What it measures: Somatization, obsessive-compulsive, depression, anxiety, phobic anxiety, hostility, paranoia, psychoticism, and interpersonal sensitivity. Benefits: Can identify patients needing treatment for depression and anxiety, as well as identify patients prone to somatization. Can compare the level of depression, anxiety and somatization to community members. Serial administrations could be used to track changes in measured variables during the course of treatment, and assess outcome.

(g). Brief Specialized Psychiatric Screening Measures

(i). Beck Depression Inventory (BDI). What it measures: Depression. Benefits: Can identify patients needing referral for further assessment and treatment for depression and anxiety, as well as identify patients prone to somatization. Repeated administrations can track progress in treatment for depression, anxiety, and somatic preoccupation.

(ii). Post Traumatic Stress Diagnostic Scale (PDS). What it Measures: Post Traumatic Stress Disorder (PTSD). Benefits: Helps confirm suspected PTSD diagnosis. Repeated administrations can track treatment progress of PTSD patients.

(iii). Center of Epidemiologic Studies-Depression Questionnaire. What it measures: Depression. Benefits: Brief self-administered screening test. Requires professional evaluation to verify diagnosis.

(iv). Brief Patient Health Questionnaire from PRIME - MD. What it measures: Depression, panic disorder. Benefits: Brief self-administered screening test. Requires professional evaluation to verify diagnosis.

(v). Zung Questionnaire. What it measures: Depression. Benefits: Brief self-administered screening test. Requires professional evaluation to verify diagnosis.

(vi). Diagnostic Studies. Imaging of the spine and/or extremities is a generally accepted, well-established, and widely used diagnostic procedure when specific indications, based on history and physical examination, are present. Physicians should refer to individual OWCA guidelines for specific information about specific testing procedures.

(vii). Radiographic Imaging, MRI, CT, bone scan, radiography, SPECT and other special imaging studies may provide useful information for many musculoskeletal disorders causing pain. Single Photon Emission Computerized Tomography (SPECT). A scanning technique which may be helpful to localize facet joint pathology and is useful in determining which patients are likely to have a response to facet injection. SPECT combines bone scans & CT Scans in looking for facet joint pathology.

(viii). Electrodiagnostic studies may be useful in the evaluation of patients with suspected myopathic or neuropathic disease and may include Nerve Conduction Studies (NCS), Standard Needle Electromyography, or Somatosensory Evoked Potential (SSEP). The evaluation of electrical studies is difficult and should be relegated to specialists who are well trained in the use of this diagnostic procedure.

(ix). Special Testing Procedures may be considered when attempting to confirm the current diagnosis or reveal alternative diagnosis. In doing so, other special tests may be performed at the discretion of the physician.

(x). Testing for complex regional pain syndrome (CRPS-I) or sympathetically maintained pain (SMP) is described in the Complex Regional Pain Syndrome/Reflex Sympathetic Dystrophy Medical Treatment Guidelines.

d. Provocation Discography

i. Description. Discography is an accepted, but rarely indicated, invasive diagnostic procedure to identify or refute a discogenic source of pain for patients who are surgical candidates. Discography should only be performed by physicians who are experienced and have been proctored in the technique. Discograms have a significant false positive rate. It is essential that all indications, pre-conditions, special considerations, procedures, reporting requirements, and results are carefully and specifically followed. Results should be interpreted judiciously.

ii. Indications. Discography may be indicated when a patient has a history of functionally limiting, unremitting low back pain of greater than four months duration, with or without leg pain, which has been unresponsive to all conservative interventions. A patient who does not desire operative therapeutic intervention is not a candidate for an invasive non-therapeutic intervention, such as provocation discography.

(a). Discography may prove useful for the evaluation of the pre-surgical spine, such as pseudarthrosis, discogenic pain at levels above or below a prior spinal fusion, annular tear, or internal disc disruption.

(b). Discography may show disc degeneration and annular disruption in the absence of low back pain. Discography may also elicit concordant pain in patients with mild and functionally inconsequential back pain. Because patients with mild back pain should not be considered for invasive treatment, discography should not be performed on these patients. In symptomatic patients with annular tears on discography, the side of the tear does not necessarily correlate with the side on which the symptoms occur. The presence of an annular tear does not necessarily identify the tear as the pain generator.

(c). Discography is not useful in previously operated discs, but may have a limited place in the work-up of pseudarthrosis. Discography may prove useful in evaluating the number of lumbar spine levels that might require fusion. CT-Discography provides further detailed information about morphological abnormalities of the disc and possible lateral disc herniations.

iii. Pre-conditions for provocation discography include all of the following.

(a). A patient with functionally limiting, unremitting back and/or leg pain of greater than four months duration in whom conservative treatment has been unsuccessful and in whom the specific diagnosis of the pain generator has not been made apparent on the basis of other noninvasive imaging studies (e.g., MRI, CT, plain films, etc.). It is recommended that discography be reserved for use in patients with equivocal MRI findings, especially at levels adjacent to clearly pathological levels. Discography may be more sensitive than MRI or CT in detecting radial annular tears. However, radial tears must always be correlated with clinical presentation.

(b). Psychosocial Evaluation has been completed. There is some evidence that false positives and complaints of long-term pain arising from the procedure itself occur more frequently in patients with somatoform disorders. Therefore, discograms should not be performed on patients with somatoform disorders.

(c). Patients who are considered surgical candidates (e.g., symptoms are of sufficient magnitude and the patient has been informed of the possible surgical options that may be available based upon the results of discography). Discography should never be the sole indication for surgery.

(d). Informed consent regarding the risks and potential diagnostic benefits of discography has been obtained.

iv. Complications-include, but are not limited to, discitis, nerve damage, chemical meningitis, pain exacerbation, and anaphylaxis therefore, prior to consideration of discography, the patient should undergo other diagnostic modalities in an effort to define the etiology of the patient's complaint including psychological evaluation, myelography, CT and MRI.

v. Contraindications-include:

(a). active infection of any type or continuing antibiotic treatment for infection; and/or

(b). bleeding diathesis or pharmaceutical anticoagulation with warfarin, etc.; and/or

(c). significant spinal stenosis at the level being studied as visualized by MRI, myelography or CT scan; and/or

(d). presence of clinical myelopathy; and/or

(e). effacement of the cord, thecal sac or circumferential absence of epidural fat; and

(f). known allergic reactions.

vi. Special Considerations

(a). Discography should not be performed by the physician expected to perform the therapeutic procedure. The procedure should be carried out by an experienced individual who has received specialized training in the technique of provocation discography.

(b). Discography should be performed in a blinded format that avoids leading the patient with anticipated responses. The procedure should always include one or more disc levels thought to be normal or non-painful in order to serve as an internal control. The patient should not know what level is being injected in order to avoid spurious results. Abnormal disc levels may be repeated to confirm concordance.

(c). Sterile technique must be utilized.

(d). Judicious use of light sedation during the procedure is acceptable, represents the most common practice nationally at the current time, and is recommended by most experts in the field. The patient must be awake and able to accurately report pain levels during the provocation portion of the procedure.

(e). The discography should be performed using a manometer to record pressure. Pressure should not exceed 50 pounds per square inch (psi) above opening pressure.

(f). Intradiscal injection of local anesthetic may be carried out after the provocation portion of the examination and the patient's response.

(g). It is recommended that a post-discogram CT be considered as it frequently provides additional useful information about disc morphology or other pathology.

vii. Reporting of Discography. In addition to a narrative report, the discography report should contain a standardized classification of disc morphology the pain response, and the pressure at which pain is produced. All results should be clearly separated in the report from the narrative portion. Asymptomatic annular tears are common and the concordant pain response is an essential finding for a positive discogram.

(a). When discography is performed to identify the source of a patient's low-back pain, both a concordant pain response and morphological abnormalities must be present at the pathological level prior to initiating any treatment directed at that level. The patient must be awake during the provocation phase of the procedure; therefore, sedative medication must be carefully titrated.

(b). Caution should be used when interpreting results from discography. Several studies indicate that a false positive discogram for pain is likely above a pressure reading of 50 psi above opening pressure. The false positive rate appears to drop to approximately 25 percent using a pressure of 20 psi above opening pressure in a population with low back pain.

(i). Reporting disc morphology as visualized by the post-injection CT scan (when available) should follow the Modified Dallas Discogram Scale where:

[a]. Grade 0 = Normal Nucleus

[b]. Grade 1 = Annular tear confined to inner one-third of annulus fibrosis.

[c]. Grade 2 = Annular tear extending to the middle third of the annulus fibrosis.

[d]. Grade 3 = Annular tear extending to the outer one-third of the annulus fibrosis.

[e]. Grade 4 = A grade 3 tear plus dissection within the outer annulus to involve more than 30 degrees of the disc circumference.

[f]. Grade 5 = Full thickness tear with extra-annular leakage of contrast, either focal or diffuse.

(ii). Reporting of pain response should be consistent with the operational criteria of the International Spine Intervention Society (ISIS) Guidelines or American Society of Interventional Pain Physicians (ASIPP) Guidelines. The report must include the level of concordance for back pain and /or leg pain using a 10-point VAS, or similar quantitative assessment. It should be noted that change in the VAS scale before and after provocation is more important than the number reported.

[a]. Unequivocal Discogenic Pain

[i]. stimulation of the target disc reproduces concordant pain

[ii]. the pain should be registered at least 7 on a 10-point VAS.

[iii]. the pain is reproduced at a pressure of less than 15 psi above opening pressure; and

[iv]. stimulation of two adjacent discs does not produce pain at all

[b]. Definite Discogenic Pain

[i]. stimulation of the target disc reproduces concordant pain

[ii]. the pain should be registered as at least 7 on a 10-point VAS.

[iii]. the pain is reproduced at a pressure of less than 15 psi above opening pressure; and

[iv]. stimulation of at least one adjacent disc does not produce pain at all

[c]. Highly Probable Discogenic Pain

[i]. stimulation of the target disc reproduces concordant pain

[ii]. that pain should be registered as at least 7 on a 10-point VAS.

[iii]. that the pain is reproduced at a pressure of less than 50 psi above opening pressure; and,

[iv]. stimulation of two adjacent discs does not produce pain at all

[d]. Probable Discogenic Pain

[i]. stimulation of the target disc reproduces concordant pain;

[ii]. that pain should be registered as at least 7 on a 10-point VAS;

[iii]. the pain is reproduced at a pressure of less than 50 psi above opening pressure; and

[iv]. stimulation of one adjacent disc does not produce pain at all, and stimulation of another adjacent disc at greater than 50 psi, produces pain, but the pain is not concordant.

[e]. Multiple combinations of factors are possible. However, if the patient does not qualify for at least a Probable Discogenic Pain' level, then the discogram should be considered negative. The VAS score prior to the discogram should be taken into account when interpreting the VAS score reported by the patient during the discogram.

[i]. Time Parameters for Provocation Discography are as follows:

aa. Frequency: One time only

bb. Maximum: Repeat Discography is rarely indicated

e. Thermography is an accepted and established procedure, but has no use as a diagnostic test for low back pain. It may be used to diagnose regional pain disorders and in these cases, refer to the OWCA's Complex Regional Pain Syndrome/Reflex Sympathetic Dystrophy Medical Treatment Guidelines.

3. Special tests are generally well-accepted tests and are performed as part of a skilled assessment of the patients' capacity to return to work, his/her strength capacities, and physical work demand classifications and tolerance. The procedures in this subsection are listed in alphabetical order, not by importance.

a. Computer-Enhanced Evaluations: may include isotonic, isometric, isokinetic and/or isoinertial measurement of movement, range of motion, endurance, or strength. Values obtained can include degrees of motion, torque forces, pressures, or resistance. Indications include determining validity of effort, effectiveness of treatment and demonstrated motivation. These evaluations should not be used alone to determine return to work restrictions.

i. Frequency - one time for evaluation. Can monitor improvements in strength every three to four weeks up to a total of six evaluations.

b. Functional capacity evaluation (FCE) is a comprehensive or modified evaluation of the various aspects of function as they relate to the worker's ability to return to work. FCEs should not be used as the sole criteria to diagnose malingering. Areas such as endurance, lifting (dynamic and static), postural tolerance, specific range of motion (ROM), coordination and strength, worker habits, employability as well as psychosocial, cognitive, and sensory perceptual aspects of competitive employment may be evaluated. Reliability of patient reports and overall effort during testing is also reported. Components of this evaluation may include: musculoskeletal screen; cardiovascular profile/aerobic capacity; coordination; lift/carrying analysis; job-specific activity tolerance; maximum voluntary effort; pain assessment/psychological screening; and non-material and material handling activities. Standardized national guidelines (such as National Institute for Occupational Safety and Health (NIOSH)) should be used as the basis for FCE recommendations.

i. When an FCE is being used to determine return to a specific jobsite, the provider is responsible for fully understanding the physical demands and the duties of the job that the worker is attempting to perform. A jobsite evaluation is frequently necessary. A job description should be reviewed by the provider and FCE evaluator prior to this evaluation. FCEs cannot be used in isolation to determine work restrictions. It is expected that the FCE may differ from both self-report of abilities and pure clinical exam findings. The length of a return to work evaluation should be based on the judgment of the referring physician and the provider performing the evaluation. Since return to work is a complicated multidimensional issue, multiple factors beyond functional ability and work demands should be considered and measured when attempting determination of readiness or fitness to return to work. The authorized treating physician must interpret the FCE in light of the individual patient's presentation and medical and personal perceptions. FCEs should not be used as the sole criteria to diagnose malingering.

ii. Depth and breadth of FCE should be assessed on a case-by-case basis and should be determined by tester and/or referring medical professional. In many cases, a work tolerance screening or return to work performance will identify the ability to perform the necessary job tasks. There is some evidence that a short form FCE reduced to a few tests produces a similar predictive quality compared to the longer two-day version of the FCE regarding length of disability and recurrence of a claim after return to work.

(a). Frequency. When the patient is unable to return to the pre-injury condition and further information is desired to determine permanent work restrictions. Prior authorization is required for repeat FCEs.

c. Jobsite Evaluation-a comprehensive analysis of the physical, mental, and sensory components of a specific job. The goal of the Jobsite evaluation is to identify any job modification needed to ensure the safety of the employee upon return to work. These components may include, but are not limited to: postural tolerance (static and dynamic); aerobic requirements; range of motion (ROM); torque/force; lifting/carrying; cognitive demands; social interactions; visual perceptual; sensation; coordination; environmental requirements of a job; repetitiveness; essential job functions; and ergonomic set up. Job descriptions provided by the employer are helpful but should not be used as a substitute for direct observation.

i. A jobsite evaluation may include observation and instruction of how work is done, what material changes (desk, chair) should be made, and determination of readiness to return to work.

ii. Requests for a jobsite evaluation should describe the expected goals for the evaluation. Goals may include, but are not limited to the following:

(a). to determine if there are potential contributing factors to the person's condition and/or for the physician to assess causality;

(b). to make recommendations for, and to assess the potential for ergonomic changes;

(c). to provide a detailed description of the physical and cognitive job requirements;

(d). to assist the patient in their return to work by educating them on how they may be able to do their job more safely in a bio-mechanically appropriate manner;

(e). to give detailed work/activity restrictions.

(i). Frequency-one time with additional visits as needed for follow-up per jobsite.

iii. Jobsite evaluation and alteration should include input from a health care professional with experience in ergonomics or a certified ergonomist, the employee, and the employer. The employee must be observed performing all job functions in order for the jobsite evaluation to be a valid representation of a typical workday. If the employee is unable to perform the job function for observation, a coworker in an identical job position may be observed instead. Periodic follow-up is recommended to assess the effectiveness of the intervention and need for additional ergonomic changes.

d. Vocational Assessment. The vocational assessment should provide valuable guidance in the determination of future rehabilitation program goals. It should clarify rehabilitation goals, which optimize both patient motivation and utilization of rehabilitation resources. If prognosis for return to former occupation is determined to be poor, except in the most extenuating circumstances, vocational assessment should be implemented within 3 to 12 months post-injury. Declaration of Maximum Medical Improvement (MMI) should not be delayed solely due to lack of attainment of a vocational assessment.

i. Frequency - one time with additional visits as needed for follow-up

e. Work Tolerance Screening (Fitness for Duty) - a determination of an individual's tolerance for performing a specific job as based on a job activity or task and may be used when a full Functional Capacity Evaluation is not indicated. It may include a test or procedure to specifically identify and quantify work-relevant cardiovascular, physical fitness and postural tolerance. It may also address ergonomic issues affecting the patient's return-to-work potential.

i. Frequency - one time for initial screen. May monitor improvements in strength every three to four weeks up to a total of six visits.

La. Admin. Code tit. 40, § I-2019

Promulgated by the Louisiana Workforce Commission, Office of Workers Compensation Administration, LR 37:1658 (June 2011), amended by the Louisiana Workforce Commission, Office of Workers Compensation, LR 40:1137 (June 2014), Amended LR 461246 (9/1/2020), Amended LR 49519 (3/1/2023).

AUTHORITY NOTE: Promulgated in accordance with R.S. 23:1203.1.