Outcomes of a Comprehensive Pain Rehabilitation Program for Patients With Fibromyalgia

OBJECTIVE

To analyze opioid intake interference with psychological, well-being, and functional outcomes and medication tapering in patients with fibromyalgia admitted to the Mayo Clinic Pain Rehabilitation Program (MCPRP) in Florida.

PATIENTS AND METHODS

A retrospective study on MCPRP outcomes was conducted. We reviewed the health records of 150 patients with fibromyalgia who participated in the program from May 1, 2014, to May 1, 2015. All patients were asked to fill out a survey at admission to and dismissal from the program. Surveys contained questions from the numeric pain score, Multidimensional Pain Inventory (perceived life control and interference of pain subscales), Center for Epidemiological Studies-Depression Scale, Pain Catastrophizing Scale, 36-Item Short-Form Health Status Survey (general health perceptions subscale), and Pain Self-Efficacy Questionnaire. A medical record review identified categories and number of medications at program admission and dismissal. Patients were divided in 2 groups: those whose concomitant medication did not include opioids at admission (no opioids group) and those whose concomitant medication included opioids at admission (opioids group).

RESULTS

By dismissal from the MCPRP, patients with fibromyalgia in the no opioids group had a significant (P<.05) improvement in all the self-reported scores. Medication, including opioids, were effectively tapered at a substantially higher percentage in the opioids group.

CONCLUSION

Benefit of the comprehensive pain rehabilitation program in patients with fibromyalgia was indicated by clinical improvements in pain severity, physical and emotional health, and functional capacity while successfully tapering medication. Opioid intake at admission may modify the program outcomes.

Treatment Effectiveness and Medication Use Reduction for Older Adults in Interdisciplinary Pain Rehabilitation

Objective

To examine the effectiveness of an interdisciplinary pain rehabilitation program (IPRP) that incorporates medication tapering on improving pain-related and performance-based outcomes for older adults with chronic noncancer pain and determine the proportion who demonstrated reliable improvement in outcome.

Patients and Methods

This 2-year retrospective clinical cohort study examined treatment outcomes of 134 older adult patients 65 years or older with chronic noncancer pain who completed a 3-week IPRP with physician-supervised medication tapering between January 1, 2015, and December 31, 2017. Pain, pain catastrophizing, depressive symptoms, and quality of life were assessed at pretreatment, posttreatment, and follow-up. Physical performance and medication use were assessed pre- and posttreatment. Outcomes were examined using a series of repeated-measures analyses of variance, examining effect size and reliable change.

Results

Significant treatment effects (P<.001) with large effect sizes were observed for all self-report and physical performance outcome measures at posttreatment and 6-month follow-up (42.5% response rate). There were no significant differences in outcome based on opioid use status at admission. Reliable change analyses revealed that 76.9% (n=103 of 134) evidenced improvement in at least 1 pain-related outcome measure at posttreatment, and 87.7% (n=50 of 57), at follow-up. Patients also had significant reductions (P<.01) in medications at posttreatment (opioids, benzodiazepines, sedative-hypnotics, selective serotonin reuptake inhibitors, serotonin-norepinephrine reuptake inhibitors, tricyclic antidepressants, and anticonvulsants).

Conclusion

Older adults with chronic noncancer pain demonstrated improved pain-related outcomes, physical performance, and decreased medication use following IPRP treatment. Results support the effectiveness of IPRPs in enhancing the physical and emotional functioning of older adults with chronic pain while also facilitating the reduction of medications that place them at risk for adverse events.

Altered regional brain T2 relaxation times in individuals with chronic orofacial neuropathic pain

The neural mechanisms underlying the development and maintenance of chronic pain following nerve injury remain unclear. There is growing evidence that chronic neuropathic pain is associated with altered thalamic firing patterns, thalamocortical dysrhythmia and altered infra-slow oscillations in ascending pain pathways. Preclinical and post-mortem human studies have revealed that neuropathic pain is associated with prolonged astrocyte activation in the dorsal horn and we have suggested that this may result in altered gliotransmission, which results in altered resting neural rhythm in the ascending pain pathway. Evidence of astrocyte activation above the level of the dorsal horn in living humans is lacking and direct measurement of astrocyte activation in living humans is not possible, however, there is evidence that regional alterations in T2 relaxation times are indicative of astrogliosis. The aim of this study was to use T2 relaxometry to explore regional brain anatomy of the ascending pain pathway in individuals with chronic orofacial neuropathic pain. We found that in individuals with trigeminal neuropathic pain, decreases in T2 relaxation times occurred in the region of the spinal trigeminal nucleus and primary somatosensory cortex, as well as in higher order processing regions such as the dorsolateral prefrontal, cingulate and hippocampal/parahippocampal cortices. We speculate that these regional changes in T2 relaxation times reflect prolonged astrocyte activation, which results in altered brain rhythm and ultimately the constant perception of pain. Blocking prolonged astrocyte activation may be effective in preventing and even reversing the development of chronic pain following neural injury.

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Reduced T2 relaxation time in the ascending pain pathway in chronic orofacial pain.

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These reductions may be associated with astrogliosis.

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Increase astrocyte activity associated with chronic orofacial pain.