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Vishal Varshney MD FRCPC,1 Jill Osborn PhD, MD, FRCPC,2 Philippe Magown PhD, MD, FRCSC,3 Scott Paquette MEd, MD, FRCSC,4 Ramesh Sahjpaul MD, MSc, FRCSC,5

1Department of Anesthesia, Providence Healthcare, Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia, Vancouver, BC, Canada.
2Department of Anesthesia, Providence Healthcare, Department of Surgery, University of British Columbia, Vancouver, BC, Canada.
3Department of Surgery, Section of Neurosurgery, University of Manitoba, Health Sciences Centre, Winnipeg, MB, Canada.
4Department of Anesthesia, Providence Healthcare, Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia, Department of Surgery, University of British Columbia, Vancouver, BC, Canada.
5Department of Anesthesia, Providence Healthcare, Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia,  Department of Surgery, University of British Columbia, Vancouver, BC, Canada.

CLINICAL TOOLS

Abstract: Chronic neuropathic pain is associated with substantial disability and societal economic impact. Formerly called Failed Back Surgery Syndrome, and now labelled as Chronic Pain after Spinal Surgery by the ICD-11, this entity represents persistent neuropathic leg pain following structurally corrective spinal surgery, often refractory to pharmacological and interventional management,. In appropriately selected patients where medical management has been unsuccessful, the minimally invasive surgical technique of spinal cord stimulation can reduce disability and pain. Technological advances continue to improve this approach with greater success, lessened morbidity, and expanding indications.
Key Words: chronic pain after spinal surgery, failed back surgery syndrome, neuropathic pain, spinal cord stimulation, neuromodulation.

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Pre-test CME Quiz Post-test CME Quiz
1. Managing chronic pain after spinal surgery is a challenging and requires combined pharmacological and interventional options.
2. Spinal cord stimulation is a modality with strong evidence to supports its efficacy in the management of patients with chronic pain after spinal surgery.
3. The workup of patients with chronic pain after spinal surgery must include multi-tier pharmacological approaches, psychological optimization, and structural spinal assessment from a multidisciplinary group of clinicians.
Neuropathic pain is defined as pain caused by a lesion or disease of the somatosensory nervous system1. Spontaneous features include burning pain and tightness with unpredictable lancinating features.
The mechanism of spinal cord stimulation involves multiple sites within the central and peripheral nervous system. SCS can influence levels of cerebrospinal fluid neurotransmitters including increases in GABA, serotonin, Substance-P, norepinephrine, acetylcholine, and adenosine, and decreases in glutamate and aspartate.
The differential target multiplexed (paresthesia-free) spinal cord stimulation programs appear superior to the older standard paresthesia-based approach.
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Related Terms: Back Health, failed back surgery syndrome, neuropathic pain, spinal cord stimulation, neuromodulation, chronic pain after spinal surgery