Treating Low Back Pain in Failed Back Surgery Patients with Multicolumn-lead Spinal Cord Stimulation
June 26th, 2018
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This paper presents a method that uses spinal cord stimulation with a multicolumn lead to treat neuropathic low back pain in failed back surgery patients.
Overview
This paper presents a method that uses spinal cord stimulation with a multicolumn lead to treat neuropathic low back pain in failed back surgery patients. The technique aims to standardize device positioning for optimal pain coverage.
Key Study Components
Area of Science
- Neuroscience
- Pain Management
- Neurostimulation
Background
- Neuropathic low back pain is a common issue in patients with failed back surgery.
- Spinal cord stimulation is a potential treatment option.
- Standardization of device positioning can enhance treatment efficacy.
- Fluoroscopic assistance is utilized for precise incision site identification.
Purpose of Study
- To evaluate the efficiency of spinal cord stimulation for treating low back pain.
- To improve patient outcomes in failed back surgery cases.
- To establish a standardized method for device placement.
Methods Used
- Patients positioned prone for the procedure.
- Fluoroscopic guidance to locate the incision site between T10 and T11.
- Local anesthetic infiltration at the incision site.
- Surgical incision and dissection of surrounding tissues to access the spinal area.
Main Results
- Standardized positioning of the device resulted in improved paresthesia coverage.
- Enhanced pain relief reported in treated patients.
- Procedure demonstrated feasibility and safety.
- Potential for broader application in similar patient populations.
Conclusions
- Spinal cord stimulation with a multicolumn lead is effective for neuropathic low back pain.
- Standardization of technique can optimize treatment outcomes.
- Further studies are warranted to confirm long-term benefits.
Frequently Asked Questions
What is spinal cord stimulation?
Spinal cord stimulation is a medical procedure that involves implanting a device to send electrical impulses to the spinal cord to relieve pain.
Who can benefit from this treatment?
Patients suffering from neuropathic low back pain, especially those with failed back surgery, may benefit from spinal cord stimulation.
How is the procedure performed?
The procedure involves positioning the patient, identifying the incision site using fluoroscopy, and implanting the device under local anesthesia.
What are the advantages of this method?
The main advantage is the standardization of device positioning for optimal pain coverage across affected areas.
Are there any risks associated with spinal cord stimulation?
As with any surgical procedure, there are risks, including infection, bleeding, and device malfunction.
How long does the procedure take?
The duration of the procedure can vary, but it typically takes a few hours from start to finish.
Executive Industry Relevance
Standardized neurostimulation device placement addresses a critical challenge in chronic pain management for failed back surgery syndrome patients, where inconsistent targeting limits therapeutic efficacy. This method enables reproducible paresthesia coverage and measurable pain relief, supporting go/no-go decisions in neuromodulation pipeline development. By establishing a fluoroscopy-guided laminectomy protocol with defined anatomical landmarks, it reduces mechanistic ambiguity in target engagement for spinal cord stimulation therapies.
Strategic Applications in Biopharma R&D
Early Discovery & Target Validation
- Scientific Value: Enables interrogation of spinal cord neuromodulation mechanisms through standardized lead placement at T8-T9 projection.
- Operational Value: Reduces variability in preclinical pain model studies by defining precise epidural targeting parameters.
Screening & Assay Development
- Scientific Value: Provides a validated surgical platform for testing neurostimulation parameters across pain phenotypes.
- Operational Value: Supports assay standardization through externalized lead trial periods with quantifiable >50% pain relief thresholds.
Translational & Preclinical Research
- Scientific Value: Bridges discovery to clinical application via disease-relevant FBSS patient selection criteria.
- Operational Value: Enables risk-adjusted advancement decisions based on sustained improvement in back pain, leg pain, activity, and quality of life metrics.
Pipeline & Workflow Integration
This technique integrates into the neuromodulation discovery continuum from target validation through preclinical validation, supporting iterative refinement of lead design and stimulation parameters.
- Discovery Biology: Supports hypothesis testing of dorsal column activation patterns using guarded cathode configurations and transverse tripolar setups.
- Screening: Delivers assay readiness via 1-month externalized trial periods with programmable pulse width (260-450ms) and rate (40-60Hz) optimization.
- Analytics: Generates quantitative dependent variable measurements including VAS pain scores, ODI disability indices, and SF-36 quality of life metrics for cross-condition comparison.
- Translational Research: Connects to preclinical continuity through fluoroscopy-confirmed midline lead placement and paresthesia mapping to dermatomal pain areas.
- Enterprise Reuse: Establishes a reusable surgical capability for multicolumn lead implantation across chronic pain indications beyond FBSS.
Operational & Enterprise Impact
- Scientific Value: Predictive confidence in target engagement through standardized fluoroscopy-guided laminectomy at T10 level.
- Operational Value: Reproducibility via consistent 30-minute procedure time once mastered and sterile technique requirements.
- Strategic Value: Reduced late-stage biological risk through >50% pain relief threshold aligning with Belgian reimbursement criteria.
- Portfolio Impact: Risk-adjusted prioritization based on sustained improvement in multifactorial pain and functional outcomes.
Implementation Considerations
- Requires neurosurgical expertise in spinal anatomy and fluoroscopy-guided epidural navigation.
- Necessitates intraoperative imaging infrastructure and sterile surgical instrumentarium for laminectomy and lead fixation.
- Demands cross-team standardization between neurosurgery, pain management, and device programming specialists.
- Involves adaptation considerations for varying vertebral anatomy while maintaining T8-T9 projection targeting.
- Limited by patient selection rigor and infection risk mitigation through meticulous layered closure techniques.
Biopharma FAQs
Why does midline lead placement at T8-T9 projection matter for target validation?
Midline lead placement at the T8 to T9 vertebral body projection ensures consistent dorsal column activation for optimal paresthesia coverage across back and leg pain areas, directly addressing variability in neuromodulation target engagement. This standardized positioning is critical for reproducible target validation in failed back surgery syndrome models.
How does fluoroscopy-guided T10 laminectomy support independent variable isolation in the discovery pipeline?
Fluoroscopic guidance to identify the incision site between T10 and T11 spinous processes enables precise, isolated manipulation of the epidural space as the independent variable, minimizing confounding surgical variability. This isolation allows researchers to attribute changes in pain outcomes specifically to lead position and stimulation parameters.
What quantitative dependent variable measurements enable pain relief assessment in this protocol?
The protocol uses a >50% pain relief threshold at the end of the 1-month externalized trial period as the primary quantitative dependent variable, meeting Belgian reimbursement criteria for permanent implantation. This threshold is derived from sustained improvements in back pain, leg pain, patient activity, and quality of life metrics.
Why do replication requirements matter for cross-functional collaboration in neurostimulation development?
Replication requirements ensure that the standardized lead placement technique produces consistent results across operators and sites, which is essential for aligning neurosurgery, pain management, and device engineering teams on predictable outcomes. Consistent replication reduces translational risk when advancing neuromodulation candidates from discovery to clinical testing.
What statistical analysis capabilities are required before implementing this spinal cord stimulation technique?
Implementation requires capability to analyze longitudinal pain and functional data using repeated measures designs to assess significance of improvements during follow-up, as demonstrated in the prospective study of 62 consecutive FBSS patients. Pre-post comparison with appropriate variance accounting is necessary to validate treatment efficacy claims.
