Failed back (surgery) syndrome: time for a paradigm shift

The incidence of failed back surgery syndrome varies between clinical setting and procedure type

BACKGROUND

Failed back surgery syndrome (FBSS) is a significant cause of lumbar disability and is associated with severe patient morbidity. As the etiology of FBSS is not completely elucidated, the risk factors and evaluation of patients with FBSS remains challenging. Our analysis of a wide variety of operation types, clinical setting, and their correlation to FBSS seeks to allow fellow clinicians to be aware of the potential risk factors that leads to this devastating diagnosis.

METHODS

Data were obtained for patients undergoing anterior lumbar fusion, posterior lumbar fusion, or decompression procedures from January 2010 to December 2017 from the Mariner insurance database. Rates of FBSS at six- and twelve-months post-surgery were determined for patients undergoing single/multilevel procedures according to place of service, and approach/procedure type.

RESULTS

From 2010 to 2017, 102,047 patients underwent lumbar fusion or decompression surgery (54% decompression procedures, 36% posterior fusions, and 8.9% anterior fusions).5.4% of patients were diagnosed with FBSS within six months of the index procedure, and 8.4% were diagnosed with FBSS within twelve months. FBSS was higher in the inpatient (6.0%) vs. outpatient (4.3%) cohort. Among the surgical techniques, multi-level procedures had significantly higher rates of FBSS than single-level procedures, the highest being 10% in multi-level inpatient decompression procedures (p < 0.05).

CONCLUSION

The highest rates of FBSS occurred in in the elderly (age group 70-74), for those patients whose index procedure was received in an inpatient setting, as well as for those receiving a multi-level surgery.

A Novel Treatment Combination for Failed Back Surgery Syndrome, With a 41-Month Follow-Up: A Retrospective Case Report

Objective

The purpose of this retrospective case report was to describe chiropractic management of a patient with failed back surgery syndrome.

Clinical Features

A 45-year-old woman presented 2 years after L4-L5 and L5-S1 fusion surgery with low back and sciatic pain. Her physical exam included a positive straight leg raise and diminished lower-extremity reflexes and muscle strength. The patient's magnetic resonance imaging showed right disc bulging and annular tearing at L2-L3 and L3-L4 disc bulging with foraminal impingement.

Intervention and Outcome

A total of 52 treatments were provided over 28 weeks consisting of multidirectional functional decompression (FD) unweighted gait training, core exercises while in FD, strengthening exercises on a vibration platform, and supine spinal FD with vibration and chiropractic spinal manipulative therapy. Over the course of treatment, the patient noted gradual improvement in function (Oswestry Disability Index) and pain (Numeric Rating Scale), with a reduction in pain medications. Follow-up of 41 months posttreatment revealed an Oswestry Disability Index score of 0 and Numeric Rating Scale score of 0, and the patient no longer was using any pain medication.

Conclusion

After a course of care, the patient in this study reported resolution of symptoms, decrease in pain medications, and improvement of function.

The appropriate management of persisting pain after spine surgery: a European panel study with recommendations based on the RAND/UCLA method

PURPOSE

Management of patients with persisting pain after spine surgery (PPSS) shows significant variability, and there is limited evidence from clinical studies to support treatment choice in daily practice. This study aimed to develop patient-specific recommendations on the management of PPSS.

METHODS

Using the RAND/UCLA appropriateness method (RUAM), an international panel of 6 neurosurgeons, 6 pain specialists, and 6 orthopaedic surgeons assessed the appropriateness of 4 treatment options (conservative, minimally invasive, neurostimulation, and re-operation) for 210 clinical scenarios. These scenarios were unique combinations of patient characteristics considered relevant to treatment choice. Appropriateness had to be expressed on a 9-point scale (1 = extremely inappropriate, 9 = extremely appropriate). A treatment was considered appropriate if the median score was ≥ 7 in the absence of disagreement (≥ 1/3 of ratings in each of the opposite sections 1-3 and 7-9).

RESULTS

Appropriateness outcomes showed clear and specific patterns. In 48% of the scenarios, exclusively one of the 4 treatments was appropriate. Conservative treatment was usually considered appropriate for patients without clear anatomic abnormalities and for those with new pain differing from the original symptoms. Neurostimulation was considered appropriate in the case of (predominant) neuropathic leg pain in the absence of conditions that may require surgical intervention. Re-operation could be considered for patients with recurrent disc, spinal/foraminal stenosis, or spinal instability.

CONCLUSIONS

Using the RUAM, an international multidisciplinary panel established criteria for appropriate treatment choice in patients with PPSS. These may be helpful to educate physicians and to improve consistency and quality of care. These slides can be retrieved under Electronic Supplementary Material.

Evaluation of pulsed electromagnetic field therapy for the treatment of chronic postoperative pain following lumbar surgery: a pilot, double-blind, randomized, sham-controlled clinical trial

Background

The incidence of chronic postoperative pain following lumbar spinal surgery has increased with the overall increase in the prevalence of lumbar surgery. This study was conducted to evaluate the analgesic effectiveness of pulsed electromagnetic field (PEMF) therapy in subjects with persistent pain following lumbar surgery.

Patients and methods

A randomized, double-blind, sham-controlled, multicenter study in 36 subjects with persistent low-back and/or radiating leg pain after lumbar surgery was conducted. Eligible subjects were randomized (1:1:1) to receive one of two doses of therapy (42-μs or 38-μs pulse width) or treatment with a sham device. Subjects self-treated twice daily for 60 days. The primary end point was change in pain intensity (∆PI) using the Numerical Pain Rating Scale between average baseline (Days −5 to −1) and end of treatment (Days 56–60) for lumbar and radiating leg pain. Secondary outcome measures included the Oswestry Disability Index, Beck Depression Inventory-II, Patient Global Impression of Change, and consumption of analgesics.

Results

Low-back pain scores for the 42-μs group decreased by 40.2% (p = 0.028), compared to 18.6% for the 38-μs pulse width group (p = 0.037) and 25.6% for the sham group (p = 0.013 per protocol population). Average leg pain scores decreased by 45.0% (42 μs, p = 0.009), 17.0% (38 μs, p = 0.293), and 24.5% (sham, p = 0.065). The proportion of subjects responding to therapy, time to 30% reduction in pain scores, and Patient Global Impression of Change were improved with the PEMF 42-μs device over the sham control, although results were associated with p-values >0.05.

Conclusion

PEMF therapy (42-μs pulse width) was associated with trends for a reduction in pain, compared to sham treatment. Secondary endpoints were consistent with an overall beneficial effect of the PEMF 42-μs pulse width device.

Does the Use of Epiduroscopic Lysis of Adhesions Reduce the Need for Spinal Cord Stimulation in Failed Back Surgery Syndrome? A Short-Term Pilot Study

BACKGROUND AND AIMS

Persistent low back pain after initially successful surgery that is not attributed to structural deficits is called failed back surgery syndrome (FBSS). When conservative and minimal invasive therapy fail, the recommended treatment is spinal cord stimulation (SCS). Because epidural fibrosis can be a contributing factor in the majority of FBSS patients, lumbosacral epiduroscopic lysis of adhesions may be considered as a less invasive alternative treatment option. We hypothesized that the use of epiduroscopic lysis of adhesions could reduce the need for SCS.

METHODS

A pilot study was performed in 35 consecutive patients with FBSS who underwent epiduroscopic lysis of adhesions. SCS was considered if epiduroscopic lysis of adhesions gave less than 50% global perceived effect (GPE) improvement after 15 months of follow-up. The GPE was measured 1 week and 6 months after the procedure.

RESULTS

Over a period of 69 months, 35 patients were included. After 15 months of follow-up, 43% of patients required SCS. Eight of the 15 patients who reported no short-term improvement needed SCS; those patients had severe epidural fibrosis. One week after epiduroscopic lysis of adhesions, 34%, 23%, and 43% of patients reported GPE improvement of > 50%, 20% to 50%, and < 20%, respectively. After 6 months, 5 patients were lost to follow-up, and 30%, 17%, and 16% of patients reported improvement of > 50%, 20% to 50%, and < 20%, respectively.

CONCLUSIONS

In this pilot study we observed a reduced need for SCS when lumbosacral epiduroscopic lysis of adhesions was used for patients with FBSS and magnetic resonance imaging-proven adhesions. These observations justify the evaluation of both treatment options in a prospective observational trial.