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Chapman KB, Amireh A, van Helmond N, Yousef TA. Evaluation of Washout Periods After Dorsal Root Ganglion Stimulation Trial. Neuromodulation 2024; 27:881-886. [PMID: 38551547 DOI: 10.1016/j.neurom.2024.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 02/18/2024] [Accepted: 02/22/2024] [Indexed: 07/08/2024]
Abstract
OBJECTIVE Dorsal root ganglion stimulation (DRG-S) is a novel therapy to treat chronic pain. It has shown efficacy when delivered intermittently, suggesting a delayed washout effect exists. To measure the washout period, and to determine whether there are differences in washout times among different types of treated pain, we measured the time for pain to return at the end of the patients' one-week DRG stimulation trials. MATERIALS AND METHODS Patients who completed a successful DRG-S trial were included. The times until 25% (t25) and 90% (t90) of baseline pain level returned were recorded. The patients were divided into neuropathic, nociceptive, and mixed pain groups for subgroup comparison. t25 and t90 were plotted in the entire cohort and subgroups using reverse Kaplan-Meier plots (failure curves) and compared using a log-rank test. RESULTS In total, 29 consecutive patients were included. Median t25 and t90 times were 7.1 and 19.5 hours, respectively. Median (interquartile range) times were longest for the nociceptive pain group (n = 17) and shortest for the neuropathic pain group (n = 6), with the mixed-pain group (n = 6) in between (t25: 7.1 [1.7-19.4], 3.40 [1.4-8.4], and 5.7 [0.8-17.6]; t90, 22.0 [10.7-71.0], 7.6 [3.6-19.8], and 20.9 [14.2-31.2], respectively). t90 times differed significantly by pain type (p = 0.040). CONCLUSIONS This study showed a prolonged washout period after cessation of DRG-S therapy. Washout times vary according to pain type. The observed effects are possibly due to long-term depression of pain signaling and could allow the implementation of alternative stimulation strategies with DRG-S. Further investigations evaluating DRG-S washout times are warranted.
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Affiliation(s)
- Kenneth B Chapman
- The Spine & Pain Institute of New York, New York City, NY, USA; Department of Anesthesiology, New York University Langone Medical Center, New York City, NY, USA; The Zucker School of Medicine at Hofstra/Northwell, New York City, NY, USA; Department of Anesthesiology, Pain, and Palliative Medicine, Radboud University Nijmegen, Nijmegen, The Netherlands.
| | - Ahmad Amireh
- The Spine & Pain Institute of New York, New York City, NY, USA
| | - Noud van Helmond
- The Spine & Pain Institute of New York, New York City, NY, USA; Department of Anesthesiology, Pain, and Palliative Medicine, Radboud University Nijmegen, Nijmegen, The Netherlands
| | - Tariq A Yousef
- The Spine & Pain Institute of New York, New York City, NY, USA
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Morgalla MH, Zhang Y, Chander BS. Dorsal Root Ganglion Stimulation Relieves Chronic Neuropathic Pain Along With a Decrease in Cortical γ Power. Neuromodulation 2024; 27:923-929. [PMID: 38551546 DOI: 10.1016/j.neurom.2024.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 01/15/2024] [Accepted: 02/13/2024] [Indexed: 07/08/2024]
Abstract
BACKGROUND Stimulation of dorsal root ganglion (DRG) is an ideal neuromodulative intervention, providing pain relief in localized chronic pain conditions because γ-band oscillations reflect the intensity of ongoing chronic pain in patients affected. OBJECTIVE We aimed to observe the role of cortical γ-band power associated with the relief of chronic neuropathic pain through DRG stimulation (DRGS). MATERIALS AND METHODS We examined nine patients (two women, mean age 56.8 years; range, 36-77 years) diagnosed with chronic neuropathic pain who underwent DRGS therapy. We used the numeric rating scale (NRS) on the painful limb and simultaneously recorded the electroencephalography to assess the broadband γ power. Assessments were conducted on the first day and on the seventh day after implantation of the DRGS system and then compared and correlated with the results of the NRS. RESULTS The NRS scores showed a significant decrease from the first day to the seventh day (p = 0.007). The resting-state γ power revealed a significant decrease (p = 0.021) between 30 and 45 Hz, recorded through the central electrode contralateral to the painful limb from the first day (mean [M] = 0.46, SD = 0.25) to the seventh day (M = 0.31, SD = 0.12) after DRGS. There was no significant change in the resting-state γ-band power recorded through the central electrode ipsilateral to the painful limb. However, we found a positive correlation in the γ-band power (rs = 0.628, p = 0.005) with the NRS rating. CONCLUSIONS A lateralized decrease in broadband γ power may be considered further evidence supporting a reduction in the hyperexcitability of the nociceptive system in response to DRGS therapy. In the future, γ-band power could serve as a biomarker for assessing the efficacy of DRGS during the seven-day test phase preceding the implantation of the DRGS system.
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Affiliation(s)
| | - Yi Zhang
- Department of Neurosurgery, Eberhard-Karls University, Tübingen, Germany
| | - Bankim Subhash Chander
- Department of Neurosurgery, Eberhard-Karls University, Tübingen, Germany; Department of Psychiatry and Psychotherapy, Center for Innovative Psychiatric and Psychotherapeutic Research, Central Institute of Mental Health Mannheim, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany; BrainPortal Technologies GmbH, Mannheim, Germany.
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Deer TR, Russo M, Grider JS, Sayed D, Lamer TJ, Dickerson DM, Hagedorn JM, Petersen EA, Fishman MA, FitzGerald J, Baranidharan G, De Ridder D, Chakravarthy KV, Al-Kaisy A, Hunter CW, Buchser E, Chapman K, Gilligan C, Hayek SM, Thomson S, Strand N, Jameson J, Simopoulos TT, Yang A, De Coster O, Cremaschi F, Christo PJ, Varshney V, Bojanic S, Levy RM. The Neurostimulation Appropriateness Consensus Committee (NACC)®: Recommendations for Spinal Cord Stimulation Long-term Outcome Optimization and Salvage Therapy. Neuromodulation 2024:S1094-7159(24)00078-3. [PMID: 38904643 DOI: 10.1016/j.neurom.2024.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 04/02/2024] [Accepted: 04/22/2024] [Indexed: 06/22/2024]
Abstract
INTRODUCTION The International Neuromodulation Society (INS) has recognized a need to establish best practices for optimizing implantable devices and salvage when ideal outcomes are not realized. This group has established the Neurostimulation Appropriateness Consensus Committee (NACC)® to offer guidance on matters needed for both our members and the broader community of those affected by neuromodulation devices. MATERIALS AND METHODS The executive committee of the INS nominated faculty for this NACC® publication on the basis of expertise, publications, and career work on the issue. In addition, the faculty was chosen in consideration of diversity and inclusion of different career paths and demographic categories. Once chosen, the faculty was asked to grade current evidence and along with expert opinion create consensus recommendations to address the lapses in information on this topic. RESULTS The NACC® group established informative and authoritative recommendations on the salvage and optimization of care for those with indwelling devices. The recommendations are based on evidence and expert opinion and will be expected to evolve as new data are generated for each topic. CONCLUSIONS NACC® guidance should be considered for any patient with less-than-optimal outcomes with a stimulation device implanted for treating chronic pain. Consideration should be given to these consensus points to salvage a potentially failed device before explant.
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Affiliation(s)
- Timothy R Deer
- The Spine and Nerve Center of the Virginias, Charleston, WV, USA.
| | - Marc Russo
- Hunter Pain Specialists, Newcastle, Australia
| | - Jay S Grider
- UKHealthCare Pain Services, Department of Anesthesiology, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Dawood Sayed
- The University of Kansas Health System, Kansas City, KS, USA
| | | | | | - Jonathan M Hagedorn
- Department of Anesthesiology and Perioperative Medicine, Division of Pain Medicine, Mayo Clinic, Rochester, MN, USA
| | - Erika A Petersen
- University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | | | | | - Ganesan Baranidharan
- Leeds Teaching Hospital National Health Service (NHS) Trust, University of Leeds, Leeds, UK
| | - Dirk De Ridder
- Dunedin School of Medicine, University of Otago, Dunedin, New Zealand
| | | | - Adnan Al-Kaisy
- Guy's and St Thomas NHS Foundation Trust, The Walton Centre for Neurology and Neurosurgery, Liverpool, UK
| | - Corey W Hunter
- Ainsworth Institute, Ichan School of Medicine, Mt Sinai Hospital, New York, NY, USA
| | | | | | - Chris Gilligan
- Brigham & Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Salim M Hayek
- Case Western Reserve University, University Hospitals of Cleveland, Cleveland, OH, USA
| | - Simon Thomson
- Pain & Neuromodulation Consulting Ltd, Nuffield Health Brentwood and The London Clinic, Brentwood, UK; Pain & Neuromodulation Centre, Mid & South Essex University NHS Hospitals, Basildon, UK
| | - Natalie Strand
- Department of Anesthesiology, Division of Pain Medicine, Mayo Clinic, Phoenix, AZ, USA
| | | | - Thomas T Simopoulos
- Arnold Warfield Pain Management Center, Harvard Medical School, Boston, MA, USA
| | - Ajax Yang
- Spine and Pain Consultant, PLLC, Staten Island, NY, USA
| | | | - Fabián Cremaschi
- Department of Neurosciences, National University of Cuyo, Mendoza, Argentina
| | - Paul J Christo
- The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Vishal Varshney
- Providence Healthcare, University of British Columbia, Vancouver, British Columbia, Canada
| | - Stana Bojanic
- Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Robert M Levy
- Neurosurgical Services, Clinical Research, Anesthesia Pain Care Consultants, Tamarac, FL, USA
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Guzzi G, Della Torre A, Bruni A, Lavano A, Bosco V, Garofalo E, La Torre D, Longhini F. Anatomo-physiological basis and applied techniques of electrical neuromodulation in chronic pain. JOURNAL OF ANESTHESIA, ANALGESIA AND CRITICAL CARE 2024; 4:29. [PMID: 38698460 PMCID: PMC11064427 DOI: 10.1186/s44158-024-00167-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Accepted: 04/24/2024] [Indexed: 05/05/2024]
Abstract
Chronic pain, a complex and debilitating condition, poses a significant challenge to both patients and healthcare providers worldwide. Conventional pharmacological interventions often prove inadequate in delivering satisfactory relief while carrying the risks of addiction and adverse reactions. In recent years, electric neuromodulation emerged as a promising alternative in chronic pain management. This method entails the precise administration of electrical stimulation to specific nerves or regions within the central nervous system to regulate pain signals. Through mechanisms that include the alteration of neural activity and the release of endogenous pain-relieving substances, electric neuromodulation can effectively alleviate pain and improve patients' quality of life. Several modalities of electric neuromodulation, with a different grade of invasiveness, provide tailored strategies to tackle various forms and origins of chronic pain. Through an exploration of the anatomical and physiological pathways of chronic pain, encompassing neurotransmitter involvement, this narrative review offers insights into electrical therapies' mechanisms of action, clinical utility, and future perspectives in chronic pain management.
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Affiliation(s)
- Giusy Guzzi
- Neurosurgery Department, "R. Dulbecco" Hospital, Department of Medical and Surgical Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Attilio Della Torre
- Neurosurgery Department, "R. Dulbecco" Hospital, Department of Medical and Surgical Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Andrea Bruni
- Anesthesia and Intensive Care Unit, "R. Dulbecco" Univesity Hospital, Department of Medical and Surgical Sciences, Magna Graecia University, Viale Europa, Catanzaro, 88100, Italy
| | - Angelo Lavano
- Neurosurgery Department, "R. Dulbecco" Hospital, Department of Medical and Surgical Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Vincenzo Bosco
- Anesthesia and Intensive Care Unit, "R. Dulbecco" Univesity Hospital, Department of Medical and Surgical Sciences, Magna Graecia University, Viale Europa, Catanzaro, 88100, Italy
| | - Eugenio Garofalo
- Anesthesia and Intensive Care Unit, "R. Dulbecco" Univesity Hospital, Department of Medical and Surgical Sciences, Magna Graecia University, Viale Europa, Catanzaro, 88100, Italy
| | - Domenico La Torre
- Neurosurgery Department, "R. Dulbecco" Hospital, Department of Medical and Surgical Sciences, "Magna Graecia" University of Catanzaro, Catanzaro, Italy
| | - Federico Longhini
- Anesthesia and Intensive Care Unit, "R. Dulbecco" Univesity Hospital, Department of Medical and Surgical Sciences, Magna Graecia University, Viale Europa, Catanzaro, 88100, Italy.
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Bhowmick S, Graham RD, Verma N, Trevathan JK, Franke M, Nieuwoudt S, Fisher LE, Shoffstall AJ, Weber DJ, Ludwig KA, Lempka SF. Computational modeling of dorsal root ganglion stimulation using an Injectrode. J Neural Eng 2024; 21:026039. [PMID: 38502956 PMCID: PMC11007586 DOI: 10.1088/1741-2552/ad357f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 02/23/2024] [Accepted: 03/19/2024] [Indexed: 03/21/2024]
Abstract
Objective.Minimally invasive neuromodulation therapies like the Injectrode, which is composed of a tightly wound polymer-coated Platinum/Iridium microcoil, offer a low-risk approach for administering electrical stimulation to the dorsal root ganglion (DRG). This flexible electrode is aimed to conform to the DRG. The stimulation occurs through a transcutaneous electrical stimulation (TES) patch, which subsequently transmits the stimulation to the Injectrode via a subcutaneous metal collector. However, it is important to note that the effectiveness of stimulation through TES relies on the specific geometrical configurations of the Injectrode-collector-patch system. Hence, there is a need to investigate which design parameters influence the activation of targeted neural structures.Approach.We employed a hybrid computational modeling approach to analyze the impact of Injectrode system design parameters on charge delivery and neural response to stimulation. We constructed multiple finite element method models of DRG stimulation, followed by the implementation of multi-compartment models of DRG neurons. By calculating potential distribution during monopolar stimulation, we simulated neural responses using various parameters based on prior acute experiments. Additionally, we developed a canonical monopolar stimulation and full-scale model of bipolar bilateral L5 DRG stimulation, allowing us to investigate how design parameters like Injectrode size and orientation influenced neural activation thresholds.Main results.Our findings were in accordance with acute experimental measurements and indicate that the minimally invasive Injectrode system predominantly engages large-diameter afferents (Aβ-fibers). These activation thresholds were contingent upon the surface area of the Injectrode. As the charge density decreased due to increasing surface area, there was a corresponding expansion in the stimulation amplitude range before triggering any pain-related mechanoreceptor (Aδ-fibers) activity.Significance.The Injectrode demonstrates potential as a viable technology for minimally invasive stimulation of the DRG. Our findings indicate that utilizing a larger surface area Injectrode enhances the therapeutic margin, effectively distinguishing the desired Aβactivation from the undesired Aδ-fiber activation.
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Affiliation(s)
- Sauradeep Bhowmick
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States of America
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI, United States of America
| | - Robert D Graham
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States of America
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI, United States of America
| | - Nishant Verma
- Department of Biomedical Engineering, University of Wisconsin–Madison, Madison, WI, United States of America
- Wisconsin Institute for Translational Neuroengineering (WITNe)–Madison, Madison, WI, United States of America
| | - James K Trevathan
- Department of Biomedical Engineering, University of Wisconsin–Madison, Madison, WI, United States of America
- Wisconsin Institute for Translational Neuroengineering (WITNe)–Madison, Madison, WI, United States of America
| | | | | | - Lee E Fisher
- Rehab Neural Engineering Labs (RNEL), Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA, United States of America
| | - Andrew J Shoffstall
- Neuronoff Inc., Cleveland, OH, United States of America
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States of America
| | - Douglas J Weber
- Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA, United States of America
- Neuroscience Institute, Carnegie Mellon University, Pittsburgh, PA, United States of America
| | - Kip A Ludwig
- Department of Biomedical Engineering, University of Wisconsin–Madison, Madison, WI, United States of America
- Wisconsin Institute for Translational Neuroengineering (WITNe)–Madison, Madison, WI, United States of America
- Department of Neurosurgery, University of Wisconsin–Madison, Madison, WI, United States of America
| | - Scott F Lempka
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States of America
- Biointerfaces Institute, University of Michigan, Ann Arbor, MI, United States of America
- Department of Anesthesiology, University of Michigan, Ann Arbor, MI, United States of America
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Verma A, Francois E, Maiti T, Cassidy L, Tolba R. Dorsal root ganglion stimulator-A targeted therapy for post-herpetic neuralgia: The Middle East Experience. Pain Pract 2024; 24:567-572. [PMID: 38050874 DOI: 10.1111/papr.13325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
BACKGROUND Post herpetic neuralgia (PHN) is a chronic neuropathic pain syndrome which presents after an episode of herpes zoster caused by the reactivation of varicella zoster virus. Conservative treatment starts with pharmacological measures using Anti-epileptics and Antidepressants. Some patients also respond well to epidural steroid injections too, but the effect is usually short lasting. Dorsal Root Ganglion Stimulator (DRG-S) has recently been suggested as a new treatment modality for PHN due to its selective targeting of the pathophysiologic focus. CASE SERIES We are reporting three cases, who were suffering from neuropathic pain after an episode of herpes zoster. Pain and pain related suffering scores were high, even with multiple antiepileptics and opioid medications. They underwent DRG-S implant and appreciated more than 50% reduction of their pain score, meaningful reduction in the dose of medications along with significant improvement of their general well being measured using Generalized Anxiety Disorder Questionnaire (GAD-7), pain disability index (PDI), and 9 Question Patient Health Questionnaire (PHQ-9). To our knowledge this is the first report on DRG stimulator from the Middle East Region. CONCLUSION DRG-S has potential to be a preferable treatment option in patients with refractory PHN and acts as a specific targeted therapy in the treatment of these patients.
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Affiliation(s)
- Amit Verma
- Anaesthesiology Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Eric Francois
- Anaesthesiology Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Tanmoy Maiti
- Neurosurgical Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Leanne Cassidy
- Anaesthesiology Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Reda Tolba
- Anaesthesiology Institute, Cleveland Clinic Abu Dhabi, Abu Dhabi, United Arab Emirates
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Pressler MP, Brenner B, Kohan LR, Mendelson AM. New-Onset Tinnitus After Dorsal Root Ganglion Stimulator Implantation: A Case Report. A A Pract 2024; 18:e01747. [PMID: 38416112 DOI: 10.1213/xaa.0000000000001747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Dorsal column (dcSCS) and dorsal root ganglion stimulation (DRG-S) complications are similar, typically related to placement and device failure. We present the first case of tinnitus after DRG-S implantation. The patient presented with complex regional pain syndrome (CRPS) type 2. After previous failed treatments, she had a lumbosacral DRG-S trial, which provided relief; however, she briefly noted ringing in her ears. After permanent implantation, she reported persistent, intolerable left-sided tinnitus. Tinnitus can be modulated by secondary somatosensory inputs to the cochlear nucleus from the dcSCS. Therefore, lumbosacral DRG-S stimulating distal sensory neurons leading to tinnitus is a feasible complication.
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Affiliation(s)
- Mark P Pressler
- From the Department of Anesthesiology, University of Virginia, Charlottesville, Virginia
| | - Brian Brenner
- From the Department of Anesthesiology, University of Virginia, Charlottesville, Virginia
| | - Lynn R Kohan
- From the Department of Anesthesiology, University of Virginia, Charlottesville, Virginia
- Department of Anesthesiology, University of Virginia Pain Management Center, Charlottesville, Virginia
| | - Andrew M Mendelson
- From the Department of Anesthesiology, University of Virginia, Charlottesville, Virginia
- Department of Anesthesiology, University of Virginia Pain Management Center, Charlottesville, Virginia
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Cheung CK, Lee KW, Yong RJ. Use of a Sheath and Stylet for a Difficult Dorsal Root Ganglion Stimulation Lead Extraction: A Case Report. A A Pract 2024; 18:e01766. [PMID: 38502524 DOI: 10.1213/xaa.0000000000001766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Dorsal root ganglion stimulation (DRG-S) is a relatively new neuromodulation technique that has shown promising results in the treatment of chronic pain conditions. We present a case of a difficult lead extraction during the explantation of a DRG-S device. The lead was unable to be removed despite multiple attempts until a sheath and stylet were used to facilitate extraction. As DRG-S utilization becomes more widespread, DRG-S device explantation will inevitably become more common. The technique described in this report may be beneficial in certain cases of difficult DRG-S lead extraction.
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Affiliation(s)
- Christopher K Cheung
- From the Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
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Pereira FES, Jagatheesaperumal SK, Benjamin SR, Filho PCDN, Duarte FT, de Albuquerque VHC. Advancements in non-invasive microwave brain stimulation: A comprehensive survey. Phys Life Rev 2024; 48:132-161. [PMID: 38219370 DOI: 10.1016/j.plrev.2024.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 01/07/2024] [Indexed: 01/16/2024]
Abstract
This survey provides a comprehensive insight into the world of non-invasive brain stimulation and focuses on the evolving landscape of deep brain stimulation through microwave research. Non-invasive brain stimulation techniques provide new prospects for comprehending and treating neurological disorders. We investigate the methods shaping the future of deep brain stimulation, emphasizing the role of microwave technology in this transformative journey. Specifically, we explore antenna structures and optimization strategies to enhance the efficiency of high-frequency microwave stimulation. These advancements can potentially revolutionize the field by providing a safer and more precise means of modulating neural activity. Furthermore, we address the challenges that researchers currently face in the realm of microwave brain stimulation. From safety concerns to methodological intricacies, this survey outlines the barriers that must be overcome to fully unlock the potential of this technology. This survey serves as a roadmap for advancing research in microwave brain stimulation, pointing out potential directions and innovations that promise to reshape the field.
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Affiliation(s)
| | - Senthil Kumar Jagatheesaperumal
- Department of Teleinformatics Engineering, Federal University of Ceará, Fortaleza, 60455-970, Ceará, Brazil; Department of Electronics and Communication Engineering, Mepco Schlenk Engineering College, Sivakasi, 626005, Tamilnadu, India
| | - Stephen Rathinaraj Benjamin
- Department of Pharmacology and Pharmacy, Laboratory of Behavioral Neuroscience, Faculty of Medicine, Federal University of Ceará, Fortaleza, 60430-160, Ceará, Brazil
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Mullins CF, Palumbo GJ, Harris S, Al-Kaisy O, Wesley S, Yearwood T, Al-Kaisy A. Effectiveness of combined dorsal root ganglion and spinal cord stimulation: a retrospective, single-centre case series for chronic focal neuropathic pain. PAIN MEDICINE (MALDEN, MASS.) 2024; 25:116-124. [PMID: 37738574 DOI: 10.1093/pm/pnad128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 09/07/2023] [Accepted: 09/18/2023] [Indexed: 09/24/2023]
Abstract
OBJECTIVE This case series retrospectively reviewed the outcomes in patients implanted with combined, synchronous dorsal root ganglion stimulation (DRGS) and spinal cord stimulation (SCS) connected to a single implantable pulse generator (IPG) in a tertiary referral neuromodulation centre in the United Kingdom. METHODS Twenty-six patients underwent a trial of DRGS+SCS for treating focal neuropathic pain between January 2016 and December 2019, with a follow-up in February 2022. A Transgrade approach was employed for DRGS. Patients were provided with 3 possible stimulation programs: DRGS-only, SCS-only, or DRGS+SCS. Patients were assessed for pain intensity, patients' global impression of change (PGIC), preferred lead(s) and complications. RESULTS Twenty patients were successful and went on for full implantation. The most common diagnosis was Complex Regional Pain Syndrome. After an average of 3.1 years follow-up, 1 patient was lost to follow-up, and 2 were non-responders. Of the remaining 17 patients, 16 (94%) continued to report a PGIC of 7. The average pain intensity at Baseline was 8.5 on an NRS scale of 0-10. At the last follow-up, the average NRS reduction overall was 78.9% with no statistical difference between those preferring DRGS+SCS (n = 9), SCS-only (n = 3) and DRGS-only (n = 5). The combination of DRGS+SCS was preferred by 53% at the last follow-up. There were no serious neurological complications. CONCLUSIONS This retrospective case series demonstrates the potential effectiveness of combined DRGS+SCS with sustained analgesia observed at an average follow-up of over 3 years. Implanting combined DRGS+SCS may provide programming flexibility and therapeutic alternatives.
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Affiliation(s)
- Cormac F Mullins
- Pain Management Department, Gassiot House, Guy's and St. Thomas' NHS Foundation Trust, London SE1 7EH, United Kingdom
- Department of Pain Medicine, South Infirmary Victoria University Hospital, Cork T12X23H, Ireland
| | - Gaetano Joseph Palumbo
- Pain Management Department, Gassiot House, Guy's and St. Thomas' NHS Foundation Trust, London SE1 7EH, United Kingdom
| | - Stephany Harris
- Pain Management Department, Gassiot House, Guy's and St. Thomas' NHS Foundation Trust, London SE1 7EH, United Kingdom
| | - Omar Al-Kaisy
- Pain Management Department, Gassiot House, Guy's and St. Thomas' NHS Foundation Trust, London SE1 7EH, United Kingdom
| | - Sam Wesley
- Pain Management Department, Gassiot House, Guy's and St. Thomas' NHS Foundation Trust, London SE1 7EH, United Kingdom
| | - Thomas Yearwood
- Pain Management Department, Gassiot House, Guy's and St. Thomas' NHS Foundation Trust, London SE1 7EH, United Kingdom
| | - Adnan Al-Kaisy
- Pain Management Department, Gassiot House, Guy's and St. Thomas' NHS Foundation Trust, London SE1 7EH, United Kingdom
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11
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Estivill-Torrús G, Martínez-Padilla AB, Sánchez-Salido L, Evercooren ABV, García-Díaz B. The dorsal root ganglion as a target for neurorestoration in neuropathic pain. Neural Regen Res 2024; 19:296-301. [PMID: 37488881 PMCID: PMC10503598 DOI: 10.4103/1673-5374.374655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 04/22/2023] [Accepted: 05/19/2023] [Indexed: 07/26/2023] Open
Abstract
Neuropathic pain is a severe and chronic condition widely found in the general population. The reason for this is the extensive variety of damage or diseases that can spark this unpleasant constant feeling in patients. During the processing of pain, the dorsal root ganglia constitute an important region where dorsal root ganglion neurons play a crucial role in the transmission and propagation of sensory electrical stimulation. Furthermore, the dorsal root ganglia have recently exhibited a regenerative capacity that should not be neglected in the understanding of the development and resolution of neuropathic pain and in the elucidation of innovative therapies. Here, we will review the complex interplay between cells (satellite glial cells and inflammatory cells) and factors (cytokines, neurotrophic factors and genetic factors) that takes place within the dorsal root ganglia and accounts for the generation of the aberrant excitation of primary sensory neurons occurring in neuropathic pain. More importantly, we will summarize an updated view of the current pharmacologic and nonpharmacologic therapies targeting the dorsal root ganglia for the treatment of neuropathic pain.
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Affiliation(s)
- Guillermo Estivill-Torrús
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), Málaga, Spain
- Unidad Clínica de Neurociencias, Hospital Regional Universitario de Málaga, Málaga, Spain
| | | | - Lourdes Sánchez-Salido
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), Málaga, Spain
- Unidad Clínica de Neurociencias, Hospital Regional Universitario de Málaga, Málaga, Spain
| | - Anne Baron-Van Evercooren
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute-ICM, INSERM, CNRS, AP-HP, Hôpital Pitié-Salpêtrière, Paris, France
| | - Beatriz García-Díaz
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina (IBIMA Plataforma BIONAND), Málaga, Spain
- Unidad Clínica de Neurociencias, Hospital Regional Universitario de Málaga, Málaga, Spain
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Gish B, Langford B, Sobey C, Singh C, Abdullah N, Walker J, Gray H, Hagedorn J, Ghosh P, Patel K, Deer T. Neuromodulation for the management of chronic pelvic pain syndromes: A systematic review. Pain Pract 2024; 24:321-340. [PMID: 37726930 DOI: 10.1111/papr.13295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 05/22/2023] [Accepted: 08/23/2023] [Indexed: 09/21/2023]
Abstract
BACKGROUND Chronic pelvic pain is a burdensome condition that involves multiple medical sub-specialties and is often difficult to treat. Sacral stimulation for functional bladder disease has been well established, but little large-scale evidence exists regarding utilization of other neuromodulation techniques to treat chronic pelvic pain. Emerging evidence does suggest that neuromodulation is a promising treatment, and we aim to characterize the use and efficacy of such techniques for treating chronic pelvic pain syndromes. MATERIALS AND METHODS A systematic review of the literature demonstrating the treatment of chronic pelvic pain syndromes with neuromodulation. Abstracts were reviewed and selected for inclusion, including case series, prospective studies, and randomized controlled trials (RCTs). Case studies and publications in abstract only were not included. The reporting for this systematic review follows Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA). The literature search was performed using MEDLINE, Embase, Cochrane Library, PubMed, CINAHL, and Scopus. RESULTS A total of 50 studies were included in this review, three of which were randomized controlled trials, and the remaining were prospective and retrospective case series. The range of pelvic pain conditions treated included interstitial cystitis, peripheral neuralgia, pudendal neuralgia, gastrointestinal pain, urogenital pain, sacroiliac joint pain, and visceral chronic pelvic pain. We reported on outcomes involving pain, functionality, psychosocial improvement, and medication reduction. CONCLUSIONS Neuromodulation is a growing treatment for various chronic pain syndromes. Peripheral nerve stimulation was the least studied form of stimulation. Posterior tibial nerve stimulation appears to offer short-term benefit, but long-term results are challenging. Sacral nerve stimulation is established for use in functional bladder syndromes and appears to offer pain improvement in these patients as well. Dorsal root ganglion stimulation and spinal cord stimulation have been used for a variety of conditions with promising results. Further studies of homogeneous patient populations are necessary before strong recommendations can be made at this time, although pooled analysis may also be impactful.
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Affiliation(s)
- Brandon Gish
- Lexington Clinic Interventional Pain, Lexington, Kentucky, USA
| | - Brendan Langford
- Division of Pain Medicine, Department of Anesthesiology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Christopher Sobey
- Division of Pain Medicine, Department of Anesthesiology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Chahait Singh
- Empire Minimally Invasive Spine and Pain, New York, New York, USA
| | - Newaj Abdullah
- Division of Pain Medicine, Department of Anesthesiology, University of Utah, Salt Lake City, Utah, USA
| | - Jeremy Walker
- Division of Pain Medicine, Department of Anesthesiology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Hannah Gray
- Department of Anesthesiology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | | | | | - Kiran Patel
- Lennox Hill Hospital, New York, New York, USA
| | - Timothy Deer
- The Spine and Nerve Center of the Virginias, Charleston, West Virginia, USA
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13
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Wahezi SE, Caparo MA, Malhotra R, Sundaram L, Batti K, Ejindu P, Veeramachaneni R, Anitescu M, Hunter CW, Naeimi T, Farah F, Kohan L. Current Waveforms in Spinal Cord Stimulation and Their Impact on the Future of Neuromodulation: A Scoping Review. Neuromodulation 2024; 27:47-58. [PMID: 38184341 DOI: 10.1016/j.neurom.2023.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 10/16/2023] [Accepted: 11/13/2023] [Indexed: 01/08/2024]
Abstract
BACKGROUND Neuromodulation is a standard and well-accepted treatment for chronic refractory neuropathic pain. There has been progressive innovation in the field over the last decade, particularly in areas of spinal cord stimulation (SCS) and dorsal root ganglion stimulation. Improved outcomes using proprietary waveforms have become customary in the field, leading to an unprecedented expansion of these products and a plethora of options for the management of pain. Although advances in waveform technology have improved our fundamental understanding of neuromodulation, a scoping review describing new energy platforms and their associated clinical effects and outcomes is needed. The authors submit that understanding electrophysiological neuromodulation may be important for clinical decision-making and programming selection for personalized patient care. OBJECTIVE This review aims to characterize ways differences in mechanism of action and clinical outcomes of current spinal neuromodulation products may affect contemporary clinical decision-making while outlining a possible path for the future SCS. STUDY DESIGN The study is a scoping review of the literature about newer generation SCS waveforms. MATERIALS AND METHODS A literature report was performed on PubMed and chapters to include articles on spine neuromodulation mechanism of action and efficacy. RESULTS A total of 8469 studies were identified, 75 of which were included for the scoping review after keywords defining recent waveform technology were added. CONCLUSIONS Clinical data suggest that neuromodulation remains a promising tool in the treatment of chronic pain. The evidence for SCS for treating chronic pain seems compelling; however, more long-term and comparative data are needed for a comparison of waveforms when it comes to the etiology of pain. In addition, an exploration into combination waveform therapy and waveform cycling may be paramount for future clinical studies and the development of new technologies.
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Affiliation(s)
- Sayed E Wahezi
- Multidisciplinary Pain Program, Montefiore Medical Center, Bronx, New York, USA.
| | - Moorice A Caparo
- Multidisciplinary Pain Program, Montefiore Medical Center, Bronx, New York, USA
| | - Ria Malhotra
- Multidisciplinary Pain Program, Montefiore Medical Center, Bronx, New York, USA
| | - Lakshman Sundaram
- Multidisciplinary Pain Program, Montefiore Medical Center, Bronx, New York, USA
| | - Kevin Batti
- Multidisciplinary Pain Program, Montefiore Medical Center, Bronx, New York, USA
| | - Prince Ejindu
- Multidisciplinary Pain Program, Montefiore Medical Center, Bronx, New York, USA
| | | | - Magdalena Anitescu
- Multidisciplinary Pain Program, Montefiore Medical Center, Bronx, New York, USA
| | - Corey W Hunter
- Multidisciplinary Pain Program, Montefiore Medical Center, Bronx, New York, USA
| | - Tahereh Naeimi
- Multidisciplinary Pain Program, Montefiore Medical Center, Bronx, New York, USA
| | - Fadi Farah
- Multidisciplinary Pain Program, Montefiore Medical Center, Bronx, New York, USA
| | - Lynn Kohan
- Multidisciplinary Pain Program, Montefiore Medical Center, Bronx, New York, USA
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14
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Lu L, Lau M, Akers L, Jones L, Selassie M, Burke M, Barley J, Hillegass M, Gleichgerrcht E. Intraoperative Neurophysiological Monitoring During Lead Placement for Dorsal Root Ganglion Stimulation: A Literature Review and Case Series. Neuromodulation 2024; 27:160-171. [PMID: 37245141 DOI: 10.1016/j.neurom.2023.04.468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 03/23/2023] [Accepted: 04/11/2023] [Indexed: 05/29/2023]
Abstract
INTRODUCTION Dorsal root ganglion stimulation (DRG-S) is a viable interventional option for intractable pain management. Although systematic data are lacking regarding the immediate neurologic complications of this procedure, intraoperative neurophysiological monitoring (IONM) can be a valuable tool to detect real-time neurologic changes and prompt intervention(s) during DRG-S performed under general anesthesia and deep sedation. MATERIALS AND METHODS In our single-center case series, we performed multimodal IONM, including peripheral nerve somatosensory evoked potentials (pnSSEPs) and dermatomal somatosensory evoked potentials (dSSEPs), spontaneous electromyography (EMG), transcranial motor evoked potentials (MEPs), and electroencephalogram (EEG) for some trials and all permanent DRG-S lead placement per surgeon preference. Alert criteria for each IONM modality were established before data acquisition and collection. An IONM alert was used to implement an immediate repositioning of the lead to reduce any possible postoperative neurologic deficits. We reviewed the literature and summarized the current IONM modalities commonly applied during DRG-S, including somatosensory evoked potentials and EMG. Because DRG-S targets the dorsal roots, we hypothesized that including dSSEP would allow more sensitivity as a proxy for potential sensory changes under generalized anesthesia than would including standard pnSSEPs. RESULTS From our case series of 22 consecutive procedures with 45 lead placements, one case had an alert immediately after DRG-S lead positioning. In this case, dSSEP attenuation was seen, indicating changes in the S1 dermatome, which occurred despite ipsilateral pnSSEP from the posterior tibial nerve remaining at baselines. The dSSEP alert prompted the surgeon to reposition the S1 lead, resulting in immediate recovery of the dSSEP to baseline status. The rate of IONM alerts reported intraoperatively was 4.55% per procedure and 2.22% per lead (n = 1). No neurologic deficits were reported after the procedure, resulting in no postoperative neurologic complications or deficits. No other IONM changes or alerts were observed from pnSSEP, spontaneous EMG, MEPs, or EEG modalities. Reviewing the literature, we noted challenges and potential deficiencies when using current IONM modalities for DRG-S procedures. CONCLUSIONS Our case series suggests dSSEPs offer greater reliability than do pnSSEPs in quickly detecting neurologic changes, and subsequent neural injury, during DRG-S cases. We encourage future studies to focus on adding dSSEP to standard pnSSEP to provide a comprehensive, real-time neurophysiological assessment during lead placement for DRG-S. More investigation, collaboration, and evidence are required to evaluate, compare, and standardize comprehensive IONM protocols for DRG-S.
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Affiliation(s)
- Lei Lu
- Department of Neurology, Medical University of South Carolina, Charleston, SC, USA.
| | - Martha Lau
- Department of Clinical Neurophysiology, Medical University of South Carolina, Charleston, SC, USA
| | - Lindsey Akers
- Department of Clinical Neurophysiology, Medical University of South Carolina, Charleston, SC, USA
| | - Lakota Jones
- Department of Clinical Neurophysiology, Medical University of South Carolina, Charleston, SC, USA
| | - Meron Selassie
- Department of Anesthesiology and Perioperative Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Martin Burke
- Department of Anesthesiology and Perioperative Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Jessica Barley
- Department of Clinical Neurophysiology, Medical University of South Carolina, Charleston, SC, USA
| | - Michael Hillegass
- Department of Anesthesiology and Perioperative Medicine, Medical University of South Carolina, Charleston, SC, USA
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15
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Boos A, Nader A. Ultrasound-Guided Percutaneous Peripheral Nerve Stimulation of C2 Dorsal Root Ganglion for the Treatment of Refractory Atypical Facial Pain: A Technical Report and Case Series. Neuromodulation 2024; 27:130-134. [PMID: 37480924 DOI: 10.1016/j.neurom.2023.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/29/2023] [Accepted: 06/12/2023] [Indexed: 07/24/2023]
Abstract
BACKGROUND Chronic craniofacial pain can be difficult to manage clinically. This technical report documents the peripheral nerve stimulation of the C2 dorsal root ganglion as an effective modality to treat refractory atypical facial pain. MATERIALS AND METHODS In this case series, three patients with chronic refractory atypical facial pain and p >50% pain relief following diagnostic C2 dorsal root ganglion blockade underwent ultrasound-guided percutaneous placement of a peripheral nerve stimulator adjacent to the C2 dorsal root ganglion. Patients were then observed clinically and monitored for improvement in symptoms and adverse events. RESULTS Three patients underwent peripheral nerve stimulator placement. At follow-up, there were no reported adverse events, and all patients reported satisfactory improvement in pain. CONCLUSION The neuromodulation of C2 dorsal root ganglion via ultrasound-guided percutaneously implanted peripheral nerve stimulator is a novel and potentially effective approach for the management of chronic refractory craniofacial pain.
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Affiliation(s)
- Austin Boos
- Department of Physical Medicine and Rehabilitation, McGaw Medical Center of Northwestern University, Chicago, IL, USA.
| | - Antoun Nader
- Department of Anesthesiology and Pain Medicine, Northwestern University, Chicago, IL, US
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16
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Tabatabaei P, Salomonsson J, Kakas P, Eriksson M. Bilateral T12 Dorsal Root Ganglion Stimulation for the Treatment of Low Back Pain With 20-Hz and 4-Hz Stimulation, a Retrospective Study. Neuromodulation 2024; 27:141-150. [PMID: 37542505 DOI: 10.1016/j.neurom.2023.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 06/08/2023] [Accepted: 06/22/2023] [Indexed: 08/07/2023]
Abstract
OBJECTIVES Chronic low back pain (CLBP) is one of the most common chronic pain conditions that cause both individual suffering and a burden to society. For these patients, several interventional treatment options such as surgery, blocks, radiofrequency, and spinal cord stimulation are available. Lately, dorsal root ganglion stimulation (DRG-S) also has been mentioned as an option by targeting bilateral T12 dorsal ganglia. In this study, we present the outcome of 11 patients with CLBP treated with bilateral T12 DRG-S. MATERIALS AND METHODS Thirteen patients with CLBP with and without leg pain were treated with bilateral T12 DRG-S. Three of the patients also received a third lumbar lead owing to leg pain. Eleven of the patients had >50% pain relief during the peri- or/and postoperative testing and received a fully implantable neurostimulator. Pain intensity, general health status, quality of life, pain catastrophizing, mental status, sleeping disorder, physical activity, and patient satisfaction were followed using numeric rating scale (NRS), Patient-Reported Outcomes Measurement Information System 29 version 2.1, Pain Catastrophizing Score, Generalized Anxiety Disorder 7-item scale, Patient Health Questionnaire Depression Module, Insomnia Severity Index, and Patient Satisfaction Questionnaire at baseline before implantation and at three months and six months. The results were analyzed on the basis of six domains: pain relief, sleeping disorder, social ability, mental status, physical activity, and satisfaction. To be identified as a responder, the patients should show a significant improvement in the pain relief domain together with at least two other domains. All responders also were given the opportunity to test 4-Hz DRG-S and compare it with traditional 20-Hz stimulation. RESULTS All 11 patients were identified as responders at six months. Five of the patients had >80% pain relief, with an average NRS score reduction of 71% for the whole group. Significant improvement could be observed in three domains for one patient, four domains for three patients, five domains for six patients, and six domains for one patient. Seven patients chose to try 4-Hz stimulation. All seven identified 4-Hz stimulation as at least as good as or better than 20-Hz stimulation and chose to continue with 4-Hz stimulation. CONCLUSIONS Bilateral T12 DRG-S seems to be an effective treatment for chronic low back pain, with significant beneficial effect not only on pain but also on quality of life, pain catastrophizing, mental status, sleeping disorder, and physical activity. 4-Hz DRG-S gave a result comparable with or better than 20-Hz stimulation.
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Affiliation(s)
| | | | - Pavlina Kakas
- Department of Clinical Science, Umeå University, Umeå, Sweden
| | - Maria Eriksson
- Department of Clinical Science, Umeå University, Umeå, Sweden
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17
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Bhowmick S, Graham RD, Verma N, Trevathan JK, Franke M, Nieuwoudt S, Fisher LE, Shoffstall AJ, Weber DJ, Ludwig KA, Lempka SF. Computational modeling of dorsal root ganglion stimulation using an Injectrode. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.20.558675. [PMID: 37790562 PMCID: PMC10542492 DOI: 10.1101/2023.09.20.558675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Objective Minimally invasive neuromodulation therapies like the Injectrode, which is composed of a tightly wound polymer-coated platinum/iridium microcoil, offer a low-risk approach for administering electrical stimulation to the dorsal root ganglion (DRG). This flexible electrode is aimed to conform to the DRG. The stimulation occurs through a transcutaneous electrical stimulation (TES) patch, which subsequently transmits the stimulation to the Injectrode via a subcutaneous metal collector. However, effectiveness of stimulation relies on the specific geometrical configurations of the Injectrode-collector-patch system. Hence, there is a need to investigate which design parameters influence the activation of targeted neural structures. Approach We employed a hybrid computational modeling approach to analyze the impact of the Injectrode system design parameters on charge delivery and the neural response to stimulation. We constructed multiple finite element method models of DRG stimulation and multi-compartment models of DRG neurons. We simulated the neural responses using parameters based on prior acute preclinical experiments. Additionally, we developed multiple human-scale computational models of DRG stimulation to investigate how design parameters like Injectrode size and orientation influenced neural activation thresholds. Main results Our findings were in accordance with acute experimental measurements and indicated that the Injectrode system predominantly engages large-diameter afferents (Aβ-fibers). These activation thresholds were contingent upon the surface area of the Injectrode. As the charge density decreased due to increasing surface area, there was a corresponding expansion in the stimulation amplitude range before triggering any pain-related mechanoreceptor (Aδ-fibers) activity. Significance The Injectrode demonstrates potential as a viable technology for minimally invasive stimulation of the DRG. Our findings indicate that utilizing a larger surface area Injectrode enhances the therapeutic margin, effectively distinguishing the desired Aβ activation from the undesired Aδ-fiber activation.
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18
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Pritzlaff SG, Goree JH, Hagedorn JM, Lee DW, Chapman KB, Christiansen S, Dudas A, Escobar A, Gilligan CJ, Guirguis M, Gulati A, Jameson J, Mallard CJ, Murphy MZ, Patel KV, Patel RG, Sheth SJ, Vanterpool S, Singh V, Smith G, Strand NH, Vu CM, Suvar T, Chakravarthy K, Kapural L, Leong MS, Lubenow TR, Abd-Elsayed A, Pope JE, Sayed D, Deer TR. Pain Education and Knowledge (PEAK) Consensus Guidelines for Neuromodulation: A Proposal for Standardization in Fellowship and Training Programs. J Pain Res 2023; 16:3101-3117. [PMID: 37727682 PMCID: PMC10505612 DOI: 10.2147/jpr.s424589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 08/23/2023] [Indexed: 09/21/2023] Open
Abstract
The need to be competent in neuromodulation is and should be a prerequisite prior to completing a fellowship in interventional pain medicine. Unfortunately, many programs lack acceptable candidates for these advanced therapies, and fellows may not receive adequate exposure to neuromodulation procedures. The American Society of Pain and Neuroscience (ASPN) desires to create a consensus of experts to set a minimum standard of competence for neurostimulation procedures, including spinal cord stimulation (SCS), dorsal root ganglion stimulation (DRG-S), and peripheral nerve stimulation (PNS). The executive board of ASPN accepted nominations for colleagues with excellence in the subject matter of neuromodulation and physician education. This diverse group used peer-reviewed literature and, based on grading of evidence and expert opinion, developed critical consensus guides for training that all accredited fellowship programs should adopt. For each consensus point, transparency and recusal were used to eliminate bias, and an author was nominated for evidence grading oversight and bias control. Pain Education and Knowledge (PEAK) Consensus Guidelines for Neuromodulation sets a standard for neuromodulation training in pain fellowship training programs. The consensus panel has determined several recommendations to improve care in the United States for patients undergoing neuromodulation. As neuromodulation training in the United States has evolved dramatically, these therapies have become ubiquitous in pain medicine. Unfortunately, fellowship programs and the Accreditation Council for Graduate Medical Education (ACGME) pain program requirements have not progressed training to match the demands of modern advancements. PEAK sets a new standard for fellowship training and presents thirteen practice areas vital for physician competence in neuromodulation.
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Affiliation(s)
- Scott G Pritzlaff
- Department of Anesthesiology and Pain Medicine, University of California, Davis, Sacramento, CA, USA
| | - Johnathan H Goree
- Department of Anesthesiology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Jonathan M Hagedorn
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Mayo Clinic, Rochester, MN, USA
| | - David W Lee
- Fullerton Orthopedic Surgery Medical Group, Fullerton, CA, USA
| | | | - Sandy Christiansen
- Department of Anesthesiology and Perioperative Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Andrew Dudas
- Mays & Schnapp Neurospine and Pain, Memphis, TN, USA
| | | | - Christopher J Gilligan
- Division of Pain Medicine, Brigham and Women’s Hospital Harvard Medical School, Boston, MA, USA
| | - Maged Guirguis
- Division of Pain Management, Ochsner Health, New Orleans, LA, USA
| | - Amitabh Gulati
- Department of Anesthesiology and Critical Care, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | | | | | | | - Kiran V Patel
- Department of Anesthesiology and Pain Medicine, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Northwell Health, Hempstead, NY, USA
| | | | - Samir J Sheth
- Interventional Pain Management, Sutter Health, Roseville, CA, USA
| | | | - Vinita Singh
- Department of Anesthesiology, Emory University, Atlanta, GA, USA
| | - Gregory Smith
- Department of Anesthesiology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Natalie H Strand
- Interventional Pain Management, Mayo Clinic, Scottsdale, AZ, USA
| | - Chau M Vu
- Evolve Restorative Center, Santa Rosa, CA, USA
| | - Tolga Suvar
- Department of Anesthesiology and Pain Medicine, Rush University Medical Center, Chicago, IL, USA
| | | | | | - Michael S Leong
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University, Stanford, CA, USA
| | - Timothy R Lubenow
- Department of Anesthesiology and Pain Medicine, Rush University Medical Center, Chicago, IL, USA
| | - Alaa Abd-Elsayed
- Department of Anesthesiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | | | - Dawood Sayed
- Department of Anesthesiology, Pain and Perioperative Medicine, University of Kansas, Kansas City, KS, USA
| | - Timothy R Deer
- The Spine and Nerve Center of the Virginias, Charleston, WV, USA
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19
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Ghorayeb JH, Chitneni A, Rupp A, Parkash A, Abd-Elsayed A. Dorsal root ganglion stimulation for the treatment of chronic pelvic pain: A systematic review. Pain Pract 2023; 23:838-846. [PMID: 37246484 DOI: 10.1111/papr.13255] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
BACKGROUND Chronic pelvic pain (CPP) is a difficult condition to treat. Due to complex pelvic innervation, dorsal column spinal cord stimulation (SCS) has not been shown to produce the same effect as dorsal root ganglion stimulation (DRGS) given emerging evidence suggesting that applying DRGS may result in favorable outcomes for individuals with CPP. The aim of this systematic review is to investigate the clinical use and effectiveness of DRGS for patients with CPP. MATERIALS AND METHODS A systematic review of clinical studies demonstrating the use of DRGS for CPP. Searches were conducted using four electronic databases (PubMed, EMBASE, CINAHL, and Web of Science) across August and September 2022. RESULTS A total of nine studies comprising 65 total patients with variable pelvic pain etiologies met the inclusion criteria. The majority of subjects implanted with DRGS reported >50% mean pain reduction at variable times of follow-up. Secondary outcomes reported throughout studies including quality of life (QOL) and pain medication consumption were reported to be significantly improved. CONCLUSIONS Dorsal root ganglion stimulation for CPP continues to lack supportive evidence from well-designed, high-quality studies and recommendations from consensus committee experts. However, we present consistent evidence from level IV studies showing success with the use of DRGS for CPP in reducing pain symptoms along with reports of improved QOL through periods as short as 2 months to as long as 3 years. Because the available studies at this time are of low quality with a high risk of bias, we strongly recommend the facilitation of high-quality studies with larger sample sizes in order to better ascertain the utility of DRGS for this specific patient population. At the same time, from a clinical perspective, it may be reasonable and appropriate to evaluate patients for DRGS candidacy on a case-by-case basis, especially those patients who report CPP symptoms that are refractory to noninterventional measures and who may not be ideal candidates for other forms of neuromodulation.
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Affiliation(s)
- Joe H Ghorayeb
- University of Medicine and Health Sciences, New York, New York, USA
| | - Ahish Chitneni
- Department of Rehabilitation and Regenerative Medicine, New York-Presbyterian Hospital - Columbia and Cornell, New York, New York, USA
| | - Adam Rupp
- Department of Physical Medicine and Rehabilitation, University of Kansas Health System, Kansas City, Kansas, USA
| | - Anishinder Parkash
- Department of Physical Medicine and Rehabilitation, Tower Health Reading Hospital/Drexel University COM, Redding, Pennsylvania, USA
| | - Alaa Abd-Elsayed
- Division of Pain Medicine, Department of Anesthesia, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA
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20
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Medina-Pérez JJ, Vega-Rosas A, Rodríguez-Méndez L, Coubert-Pelayo SG. A Case Report on Spinal Neurostimulator Treatment for Painful Postsurgical Neuropathy of the Genitofemoral Nerve. Cureus 2023; 15:e42345. [PMID: 37621780 PMCID: PMC10445000 DOI: 10.7759/cureus.42345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/17/2023] [Indexed: 08/26/2023] Open
Abstract
Painful postsurgical neuropathy is an adverse event inherent to a wide variety of surgical treatments, so its diagnosis and specialized treatment are essential to maintaining the quality of life of the people who suffer from it. We present the case of a 31-year-old male with neuropathy of the genitofemoral nerve diagnosed by electromyography, resulting in intractable left testicular and thigh pain associated with a recent history of ipsilateral inguinal hernioplasty. After assessment by pain medicine and motor and sensory tests, a neurostimulator was placed in T8-T9 with action at the L1-L2 level, as well as a simultaneous electrode in S3, generating optimal pain relief and recovery of functionality.
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Affiliation(s)
- Juan J Medina-Pérez
- Pain Management Center, Hospital Ángeles Mocel, Mexico City, MEX
- Pain Clinic, Hospital Escandón, Mexico City, MEX
| | - Andrés Vega-Rosas
- Pain Management Center, Hospital Ángeles Mocel, Mexico City, MEX
- Pain Clinic, Hospital Escandón, Mexico City, MEX
| | | | - Silvia G Coubert-Pelayo
- Pain Management Center, Hospital Ángeles Mocel, Mexico City, MEX
- Pain Clinic, Hospital Escandón, Mexico City, MEX
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21
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Yang S, Zhong S, Fan Y, Zhu Y, Xu N, Liao Y, Fan G, Liao X, He S. Research hotspots and trends on spinal cord stimulation for pain treatment: a two-decade bibliometric analysis. Front Neurosci 2023; 17:1158712. [PMID: 37304039 PMCID: PMC10248081 DOI: 10.3389/fnins.2023.1158712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Accepted: 05/04/2023] [Indexed: 06/13/2023] Open
Abstract
Background Chronic pain poses a significant social burden. Spinal cord stimulation (SCS) is considered to be the most promising treatment for refractory pain. The aim of this study was to summarize the current research hotspots on SCS for pain treatment during the past two decades and to predict the future research trends by bibliometric analysis. Methods The literature over the last two decades (2002-2022) which was related to SCS in pain treatment was obtained from the Web of Science Core Collection. Bibliometric analyses were conducted based on the following aspects: (1) Annual publication and citation trends; (2) Annual publication changes of different publication types; (3) Publications and citations/co-citations of different country/institution/journal/author; (4) Citations/co-citation and citation burst analysis of different literature; and (5) Co-occurrence, cluster, thematic map, trend topics, and citation burst analysis of different keywords. (6) Comparison between the United States and Europe. All analyses were performed on CiteSpace, VOSviewer, and R bibliometrix package. Results A total of 1,392 articles were included in this study, with an increasing number of publications and citations year by year. The most highly published type of literature was clinical trial. United States was the country with the most publications and citations; Johns Hopkins University was the institution with the most publications; NEUROMODULATION published the most papers; the most published author was Linderoth B; and the most cited paper was published in the PAIN by Kumar K in 2007. The most frequently occurring keywords were "spinal cord stimulation," "neuropathic pain," and "chronic pain," etc. Conclusion The positive effect of SCS on pain treatment has continued to arouse the enthusiasm of researchers in this field. Future research should focus on the development of new technologies, innovative applications, and clinical trials for SCS. This study might facilitate researchers to comprehensively understand the overall perspective, research hotspots, and future development trends in this field, as well as seek collaboration with other researchers.
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Affiliation(s)
- Sheng Yang
- Department of Orthopedic, Spinal Pain Research Institute, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Sen Zhong
- Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yunshan Fan
- Department of Orthopedic, Spinal Pain Research Institute, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yanjie Zhu
- Department of Orthopedic, Spinal Pain Research Institute, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Ningze Xu
- Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yue Liao
- Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Guoxin Fan
- Department of Pain Medicine, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, China
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, School of Biomedical Engineering, Shenzhen University Medical school, Shenzhen, China
- Department of Spine Surgery, Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xiang Liao
- Department of Pain Medicine, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, China
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, School of Biomedical Engineering, Shenzhen University Medical school, Shenzhen, China
| | - Shisheng He
- Department of Orthopedic, Spinal Pain Research Institute, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
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22
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Zuo L, Su A, Shi Y, Li N, Chen S, Yang X. Case report: Spinal cord stimulation in the treatment of pediatric erythromelalgia. Front Neurol 2023; 14:1143241. [PMID: 37273700 PMCID: PMC10233004 DOI: 10.3389/fneur.2023.1143241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 04/27/2023] [Indexed: 06/06/2023] Open
Abstract
Introduction In children, erythromelalgia is a rare chronic pain syndrome characterized by erythema, severe burning pain, and itching of affected feet. Unfortunately, there is no definitive therapy available currently. Case report Here, we report a case of primary erythromelalgia and the treatment response in a 10-year-old boy, whose genetic findings for mutations in the SCN9A gene were positive and skin biopsy results were diagnosed as small fiber neuropathy, while he has suffered from excruciating burning pain, itching, erythema, and recurrent infections over the past 3 years. He did not respond well to conventional treatment, and the only way to receive minimal relief was to immerse his feet in ice water. After a successful trial of spinal cord stimulation (SCS), the implantable pulse generator (IPG) was successfully implanted without complications, and it proved partial response to therapy. Conclusion There is no specific, efficient treatment for pediatric erythromelalgia currently, but this case demonstrates neuromodulation serves as part of the multimodal regimen to treat pediatric erythromelalgia.
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23
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Stark CW, Isaamullah M, Hassan SS, Dyara O, Abd-Elsayed A. A Review of Chronic Pain and Device Interventions: Benefits and Future Directions. Pain Ther 2023; 12:341-354. [PMID: 36581788 PMCID: PMC10036715 DOI: 10.1007/s40122-022-00470-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 12/01/2022] [Indexed: 12/31/2022] Open
Abstract
Chronic pain is a debilitating condition with a growing prevalence both in the USA and globally. The complex nature of this condition necessitates a multimodal approach to pain management that extends beyond the established pharmaceutical interventions currently employed. A variety of devices comprising both invasive and noninvasive approaches are available to patients, serving as adjuvants to existing regimens. The benefits of these interventions are notable for their lack of addiction potential, potential for patient autonomy regarding self-administration, minimal to no drug interaction, and overall relative safety. However, there remains a need for further research and more robust clinical trials to assess the true efficacy of these interventions and elucidate if there is an underlying physiological mechanism to their benefit in treating chronic pain or if their effect is predominantly placebo in nature. Regardless, the field of device-based intervention and treatment remains an evolving field with much promise for the future chronic pain management.
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Affiliation(s)
- Cain W Stark
- Department of Anesthesiology, Medical College of Wisconsin, Wauwatosa, WI, USA
| | - Mir Isaamullah
- Department of Anesthesiology, Medical College of Wisconsin, Wauwatosa, WI, USA
| | | | - Omar Dyara
- Department of Anesthesiology, Medical College of Wisconsin, Wauwatosa, WI, USA
| | - Alaa Abd-Elsayed
- Department of Anesthesiology, University of Wisconsin School of Medicine and Public Health, 750 Highland Ave, Madison, WI, 53726, USA.
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24
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Valero EG, Acosta Acosta CDP, Vargas Useche W, Orozco Sandoval L, Seija-Butnaru D, Sánchez-Flórez JC, Linares Escobar R, Amaya S. Perioperative Management of Painful Phantom Limb Syndrome: A Narrative Review and Clinical Management Proposal. J Pain Palliat Care Pharmacother 2023:1-15. [PMID: 36929710 DOI: 10.1080/15360288.2023.2187005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
Objective: Painful Phantom Limb Syndrome (PPLS) occurs in 50 to 80% of patients undergoing amputation, having a great impact on quality of life, productivity and psychosocial sphere. The objective of this review is to summarize the pharmacological and non-pharmacological strategies, surgical optimization, and provide a multidisciplinary approach aimed at reducing the incidence of chronic pain associated with PPLS in patients undergoing limb amputation.Methods: A narrative review was carried out using Medline, Pubmed, Proquest, LILACS and Cochrane, searching for articles between 2000 and 2021. Articles describing the epidemiology, pathophysiological considerations, and current treatments were selected after a screening process.Results: A multidisciplinary and multimodal approach is required in PPLS, and should include the use of regional techniques, and adjuvants such as NSAIDs, ketamine, lidocaine and gabapentinoids. In addition, an evaluation and continuous management of risk factors for chronic pain in conjunction with the surgical team is necessary.Conclusion: The current literature does not support that a single technique is effective in the prevention of PPLS. However, adequate acute pain control, rehabilitation and early restoration of the body scheme under a multidisciplinary and multimodal approach have shown benefit in the acute setting.
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25
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Rosado Caracena R, Mendiola de la Osa A, Rincón Higuera A, Abad Fau de Casajuana E, Ruiz Córdoba G, García de Lucas F. Cervical dorsal root ganglion stimulation for complex regional pain syndrome: Technical description and results of seven cases. Pain Pract 2023; 23:242-251. [PMID: 36380700 DOI: 10.1111/papr.13183] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 09/20/2022] [Accepted: 10/11/2022] [Indexed: 11/17/2022]
Abstract
INTRODUCTION Complex regional pain syndrome (CRPS) is characterized by nociplastic pain with alterations in sympathetic function. Neuromodulation could be a useful alternative therapy option. Dorsal root ganglion (DRG) stimulation has demonstrated better results than conventional spinal cord stimulation (SCS) for patients with CRPS in lower limbs. METHODS We report a case series of seven patients treated with cervical DRG stimulation for CRPS of the hand that required neuromodulation for pain relief, after no response with other analgesic techniques (medication and interventional). We report retrospective data collection of seven consecutive patients with a 1-year follow-up. RESULTS Seven patients were trialed, and six were implanted with a permanent pulse generator after achieving more than 50% pain relief during 2-7 days of trial phase. The average pain relief (rated on a standard 100 mm visual analog scale) after 1 year of treatment was 64.3% ± 16.6. No major complications were observed during a 1-year follow-up. DISCUSSION The results for cervical DRG stimulation are similar to other DRG stimulation studies for the treatment of refractory CRPS at lower levels. The cervical DRG implant technique guided with C-arm fluoroscopy and under conscious sedation could be a safe and effective option for relieving pain of the upper limbs CRPS. Monitoring neural status is required for cervical DRG stimulation either with a responder awake patient or with intraoperative neural monitoring in non-responder patients.
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Affiliation(s)
| | - Agustín Mendiola de la Osa
- Hospital FREMAP Majadahonda, Majadahonda, Madrid, Spain.,Puerta de Hierro Hospital, Majadahonda, Madrid, Spain
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26
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Chapman KB, Tupper C, Vissers KC, van Helmond N, Yousef T. Dorsal root ganglion stimulation for the treatment of joint pain with predominantly nociceptive characteristics: A case series. Pain Pract 2023; 23:317-324. [PMID: 36334041 DOI: 10.1111/papr.13180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 09/28/2022] [Accepted: 10/27/2022] [Indexed: 11/06/2022]
Abstract
INTRODUCTION Dorsal root ganglion stimulation (DRG-S) has recently emerged as a novel therapy in neuromodulation that demonstrated a higher rate of success than spinal cord stimulation (SCS) in a prospective, head-to-head randomized comparative trial to treat complex regional pain syndrome (CRPS) and causalgia. In contrast to SCS, DRG-S also shows promise in treating conditions that are not purely neuropathic such as axial low back pain, which has a prominent nociplastic pain component. It is not known to what extent the effectiveness of DRG-S for such indications is due to effective treatment of the neuropathic pain component versus the effects of DRG-S on mechanical pain. Although rarely studied, reporting outcomes of DRG-S to treat predominantly mechanical/nociceptive pain may help point toward expanding the utility of this therapy. Here, we present five cases of refractory mechanical pain treated with DRG-S. METHODS A retrospective analysis of all patients who underwent a successful DRG-S trial and implant between September 2017 and September 2021 at our institute was performed. Patients who had intractable joint pain without strong evidence of neuropathic pain were included in this case series. The Budapest criteria for CRPS, the Douleur Neuropathique 4 Questions (DN4) survey, or a definable nerve injury were used to determine the presence of neuropathic pain. Baseline assessments for pain (Numeric Rating Scale [NRS]), function (Oswestry Disability Index [ODI]), quality of life (EuroQol-5 Dimension [EQ-5D]), and other applicable joint surveys were extracted from pre-trial baseline and follow-up appointments. RESULTS Five patients were identified and included. Patient diagnoses consisted of refractory joint pain of the hip, knee, or ankle. Mean NRS pain scores improved by 74% from 9.2 at baseline to 2.4 at the last follow-up (mean = 28 months post-implant). From baseline to the last follow-up, mean ODI scores improved by 65% from 66 to 23 and EQ-5D scores more than doubled from an average of 0.371 to 0.797. CONCLUSION This clinical report illustrates the potential utility DRG-S has in treating pain that clinically presents as predominantly refractory mechanical joint pain without a significant neuropathic component. The physiological reasons for our observations may be that DRG-S is able to directly influence the conduction of nociceptive signaling at the DRG and within the spinal cord. Further investigations are warranted to determine if DRG-S is a potential treatment option for chronic mechanical pain.
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Affiliation(s)
- Kenneth B Chapman
- Spine & Pain Institute of New York, New York, New York, USA.,Department of Anesthesiology, New York University Langone Medical Center, New York, New York, USA.,Departement of Anesthesiology, Zucker School of Medicine at Hofstra/Northwell, Hempstead, New York, USA.,Department of Anesthesiology, Pain, and Palliative Medicine, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Connor Tupper
- Creighton University Medical College, Omaha, Nebraska, USA
| | - Kris C Vissers
- Department of Anesthesiology, Pain, and Palliative Medicine, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Noud van Helmond
- Spine & Pain Institute of New York, New York, New York, USA.,Department of Anesthesiology, Pain, and Palliative Medicine, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Tariq Yousef
- Spine & Pain Institute of New York, New York, New York, USA
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27
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Gónima Valero E, Mendoza WAS, Sarmiento DA, Amaya S. Analgesic Treatment Approach for Postherpetic Neuralgia: A Narrative Review. J Pain Palliat Care Pharmacother 2023:1-10. [PMID: 36731106 DOI: 10.1080/15360288.2023.2174632] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Post-herpetic neuralgia (PHN) is an entity derived from peripheral nerve damage that occurs during the reactivation of the Varicella Zoster Virus (VZV), which manifests itself through pain with neuropathic characteristics. This can prove to be very difficult to manage in the chronic stages of disease reappearance. There currently exists a multitude of treatment alternatives for PHN, however, prevention through the early initiation of antiviral regimens is vital. There are various pharmacological options available, but it is important to individualize each patient to maximize efficacy and minimize adverse effects. Interventional procedures have become a cornerstone in difficult-to-manage cases, and have shown promising outcomes when used in a multimodal approach by experienced specialists. It is necessary to make an objective diagnosis of PHN and start early treatment. Additionally there is current evidence that vouches for interventional therapies as well as individualization, with a clear establishment of therapeutic objectives according to the needs of each patient.
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Affiliation(s)
- Edmundo Gónima Valero
- Anesthesiologist and Pain Management Specialist, Chief, Hospital Militar Central, Bogotá, Colombia
| | | | | | - Sebastian Amaya
- Anesthesiology and Critical Care Interest Group UEB, Universidad El Bosque Colombian School of Medicine, Bogotá, Colombia
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28
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Chauhan G, Srinivasan SK, Khanduja S. Dorsal Root Ganglion Stimulation Therapy for Refractory Idiopathic Pudendal Neuralgia. Cureus 2023; 15:e34681. [PMID: 36909041 PMCID: PMC9994636 DOI: 10.7759/cureus.34681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/06/2023] [Indexed: 02/09/2023] Open
Abstract
Dorsal root ganglion stimulation is a relatively new treatment option for chronic pain conditions such as pudendal neuralgia, which is a chronic pain condition affecting the pudendal nerve in the pelvic region. Pudendal neuralgia is a debilitating condition that can significantly affect the patient's quality of life. In dorsal root ganglion stimulation, a small device is implanted that delivers electrical impulses to the dorsal root ganglion to modulate pain signals coming from the pudendal nerve. The procedure is considered investigational and has been investigated in case series and case reports with promising results. However, more research is needed to fully understand its safety and effectiveness. This case report highlights the potential of dorsal root ganglion stimulation as a treatment option for pudendal neuralgia and the need for further research to establish it as a standard treatment option.
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Affiliation(s)
- Gaurav Chauhan
- Anesthesiology and Perioperative Medicine, University of Pittsburgh Medical Center Presbyterian, Pittsburgh, USA
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29
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Chapman KB, Sayed D, Lamer T, Hunter C, Weisbein J, Patel KV, Dickerson D, Hagedorn JM, Lee DW, Amirdelfan K, Deer T, Chakravarthy K. Best Practices for Dorsal Root Ganglion Stimulation for Chronic Pain: Guidelines from the American Society of Pain and Neuroscience. J Pain Res 2023; 16:839-879. [PMID: 36942306 PMCID: PMC10024474 DOI: 10.2147/jpr.s364370] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Accepted: 01/17/2023] [Indexed: 03/14/2023] Open
Abstract
With continued innovations in neuromodulation comes the need for evolving reviews of best practices. Dorsal root ganglion stimulation (DRG-S) has significantly improved the treatment of complex regional pain syndrome (CRPS), and it has broad applicability across a wide range of other conditions. Through funding and organizational leadership by the American Society for Pain and Neuroscience (ASPN), this best practices consensus document has been developed for the selection, implantation, and use of DRG stimulation for the treatment of chronic pain syndromes. This document is composed of a comprehensive narrative literature review that has been performed regarding the role of the DRG in chronic pain and the clinical evidence for DRG-S as a treatment for multiple pain etiologies. Best practice recommendations encompass safety management, implantation techniques, and mitigation of the potential complications reported in the literature. Looking to the future of neuromodulation, DRG-S holds promise as a robust intervention for otherwise intractable pain.
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Affiliation(s)
- Kenneth B Chapman
- The Spine & Pain Institute of New York, New York, NY, USA
- Department of Anesthesiology, Zucker School of Medicine at Hofstra Northwell, Manhasset, NY, USA
- Department of Anesthesiology, NYU Langone Medical Center, New York, NY, USA
- Correspondence: Kenneth B Chapman, NYU Langone Medical Center, Zucker School of Medicine at Hofstra/Northwell, Pain Medicine at Staten Island University Hospital, 1360 Hylan Boulevard, Staten Island, NY, 10305, USA, Email
| | - Dawood Sayed
- Department of Anesthesiology, The University of Kansas Medical Center (KUMC), Kansas City, KS, USA
| | - Tim Lamer
- Department of Anesthesiology and Perioperative Medicine, Division of Pain Medicine, Mayo Clinic, Rochester, MN, USA
| | - Corey Hunter
- Ainsworth Institute of Pain Management, New York, NY, USA
| | | | - Kiran V Patel
- The Spine & Pain Institute of New York, New York, NY, USA
- Department of Anesthesiology, Zucker School of Medicine at Hofstra Northwell, Manhasset, NY, USA
- Department of Anesthesiology, NYU Langone Medical Center, New York, NY, USA
| | - David Dickerson
- Department of Anesthesiology, Critical Care and Pain Medicine, NorthShore University Health System, Evanston, IL, USA
- Department of Anesthesia & Critical Care, University of Chicago, Chicago, IL, USA
| | | | - David W Lee
- Fullerton Orthopedic Surgery Medical Group, Fullerton, CA, USA
| | | | - Timothy Deer
- The Spine and Nerve Center of the Virginias, Charleston, WV, USA
| | - Krishnan Chakravarthy
- Department of Anesthesiology and Pain Medicine, University of California San Diego Health Sciences, San Diego, CA, USA
- VA San Diego Healthcare System, San Diego, CA, USA
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30
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Hunter CW, Deer TR, Jones MR, Chang Chien GC, D'Souza RS, Davis T, Eldon ER, Esposito MF, Goree JH, Hewan-Lowe L, Maloney JA, Mazzola AJ, Michels JS, Layno-Moses A, Patel S, Tari J, Weisbein JS, Goulding KA, Chhabra A, Hassebrock J, Wie C, Beall D, Sayed D, Strand N. Consensus Guidelines on Interventional Therapies for Knee Pain (STEP Guidelines) from the American Society of Pain and Neuroscience. J Pain Res 2022; 15:2683-2745. [PMID: 36132996 PMCID: PMC9484571 DOI: 10.2147/jpr.s370469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 08/12/2022] [Indexed: 11/23/2022] Open
Abstract
Knee pain is second only to the back as the most commonly reported area of pain in the human body. With an overall prevalence of 46.2%, its impact on disability, lost productivity, and cost on healthcare cannot be overlooked. Due to the pervasiveness of knee pain in the general population, there are no shortages of treatment options available for addressing the symptoms. Ranging from physical therapy and pharmacologic agents to interventional pain procedures to surgical options, practitioners have a wide array of options to choose from – unfortunately, there is no consensus on which treatments are “better” and when they should be offered in comparison to others. While it is generally accepted that less invasive treatments should be offered before more invasive ones, there is a lack of agreement on the order in which the less invasive are to be presented. In an effort to standardize the treatment of this extremely prevalent pathology, the authors present an all-encompassing set of guidelines on the treatment of knee pain based on an extensive literature search and data grading for each of the available alternative that will allow practitioners the ability to compare and contrast each option.
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Affiliation(s)
- Corey W Hunter
- Ainsworth Institute of Pain Management, New York, NY, USA.,Department of Rehabilitation & Human Performance, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Timothy R Deer
- The Spine and Nerve Center of the Virginias, Charleston, WV, USA
| | | | | | - Ryan S D'Souza
- Department of Anesthesiology, Mayo Clinic, Rochester, MN, USA
| | | | - Erica R Eldon
- Department of Rehabilitation & Human Performance, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | - Johnathan H Goree
- Department of Anesthesiology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Lissa Hewan-Lowe
- Department of Rehabilitation & Human Performance, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Jillian A Maloney
- Department of Anesthesiology, Division of Pain Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - Anthony J Mazzola
- Department of Rehabilitation & Human Performance, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | | | | | - Jeanmarie Tari
- Ainsworth Institute of Pain Management, New York, NY, USA
| | | | | | - Anikar Chhabra
- Department of Orthopedic Surgery, Mayo Clinic, Phoenix, AZ, USA
| | | | - Chris Wie
- Interventional Spine and Pain, Dallas, TX, USA
| | - Douglas Beall
- Comprehensive Specialty Care, Oklahoma City, OK, USA
| | - Dawood Sayed
- Department of Anesthesiology, Division of Pain Medicine, University of Kansas Medical Center, Kansas City, KS, USA
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31
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Telkes I, Hadanny A, DiMarzio M, Chitnis G, Paniccioli S, O'Connor K, Grey R, McCarthy K, Khazen O, McLaughlin B, Pilitsis JG. High-Resolution Spinal Motor Mapping Using Thoracic Spinal Cord Stimulation in Patients With Chronic Pain. Neurosurgery 2022; 91:459-469. [PMID: 35876669 PMCID: PMC10553191 DOI: 10.1227/neu.0000000000002054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 04/11/2022] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND High-resolution spinal cord stimulation (HR-SCS) paddle can stimulate medial-dorsal columns and extend stimulation coverage to the laterally positioned spinal targets. OBJECTIVE To investigate the medio-lateral selectivity of an HR-SCS paddle in patients with chronic pain. METHODS During standard-of-care spinal cord stimulation (SCS) placement, epidurally evoked electromyography and antidromic dorsal column-evoked potentials were recorded in 12 subjects using an HR-SCS paddle with 8 medio-lateral sites spanning the full epidural width at thoracic T9-12 and a commercial paddle consecutively. RESULTS Recruitment maps were aligned with respect to physiological midline which was overlapping with anatomic midline in 10 of 11 cases. Overlapping contacts between the HR-SCS and commercial paddles exhibited similar patterns while HR-SCS demonstrated higher precision targeting of certain dermatomes. Spinal motor maps showed that the lateral contacts triggered stronger responses in medial gastrocnemius, adductor magnus, and tibialis anterior while the medial contacts triggered stronger responses in gluteus maximus and adductor hallucis. The time-locked popliteal fossa responses indicated ipsilateral activation by HR-SCS at the lateral contacts and bilateral activation at the medial contacts with stronger ipsilateral responses. CONCLUSION This study is the first to perform high-resolution medio-lateral SCS mapping in patients with chronic pain. These results show promise that HR-SCS may provide additional ipsilateral recruitment within the extremities which improve targeting of focal pain in the lower extremities. Furthermore, this study supports the functional use of intraoperative neuromonitoring as a decision tool to determine physiological midline in thoracic SCS surgeries and provides a full methodological framework.
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Affiliation(s)
- Ilknur Telkes
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, New York, USA
| | - Amir Hadanny
- Department of Neurosurgery, Albany Medical College, Albany, New York, USA
| | - Marisa DiMarzio
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, New York, USA
| | | | | | | | - Rachael Grey
- Nuvasive Clinical Services, San Diego, California, USA
| | | | - Olga Khazen
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, New York, USA
| | | | - Julie G. Pilitsis
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, New York, USA
- Department of Neurosurgery, Albany Medical College, Albany, New York, USA
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32
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Hagedorn JM, Pittelkow TP, Bendel MA, Moeschler SM, Orhurhu V, Sanchez-Sotelo J. The painful shoulder arthroplasty: appropriate work-up and review of interventional pain treatments. JSES REVIEWS, REPORTS, AND TECHNIQUES 2022; 2:269-276. [PMID: 37588877 PMCID: PMC10426573 DOI: 10.1016/j.xrrt.2022.04.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 08/18/2023]
Abstract
Shoulder arthroplasty is a successful surgical procedure for several conditions when patients become refractory to conservative management modalities. Unfortunately, some patients experience persistent chronic pain after shoulder arthroplasty. These individuals should undergo a comprehensive evaluation by an orthopedic surgeon to determine whether structural pathology is responsible for the pain and to decide whether reoperation is indicated. At times, a surgical solution does not exist. In these circumstances, a thorough and specific plan for the management of persistent chronic pain should be developed and instituted. In this article, we review common reasons for persistent pain after shoulder arthroplasty and outline the evaluation of the painful shoulder arthroplasty. We then provide a thorough review of interventional pain management strategies. Finally, we hypothesize developments in our field that might provide better outcomes in the future for patients suffering with chronic intractable pain after shoulder arthroplasty.
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Affiliation(s)
- Jonathan M. Hagedorn
- Corresponding author: Jonathan M. Hagedorn, MD, Department of Anesthesiology and Perioperative Medicine, Division of Pain Medicine, Mayo Clinic, Rochester, MN 55905, USA.
| | - Thomas P. Pittelkow
- Department of Anesthesiology and Perioperative Medicine, Division of Pain Medicine, Mayo Clinic, Rochester, MN, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - Markus A. Bendel
- Department of Anesthesiology and Perioperative Medicine, Division of Pain Medicine, Mayo Clinic, Rochester, MN, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - Susan M. Moeschler
- Department of Anesthesiology and Perioperative Medicine, Division of Pain Medicine, Mayo Clinic, Rochester, MN, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - Vwaire Orhurhu
- Department of Anesthesiology and Perioperative Medicine, Division of Pain Medicine, Mayo Clinic, Rochester, MN, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
| | - Joaquin Sanchez-Sotelo
- Department of Anesthesiology and Perioperative Medicine, Division of Pain Medicine, Mayo Clinic, Rochester, MN, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA
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33
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Strand N, J M, Tieppo Francio V, M M, Turkiewicz M, El Helou A, M M, S C, N S, J P, C W. Advances in Pain Medicine: a Review of New Technologies. Curr Pain Headache Rep 2022; 26:605-616. [PMID: 35904729 PMCID: PMC9334973 DOI: 10.1007/s11916-022-01062-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/01/2022] [Indexed: 11/25/2022]
Abstract
Purpose of Review This narrative review highlights the interventional musculoskeletal techniques that have evolved in recent years. Recent Findings The recent progress in pain medicine technologies presented here represents the ideal treatment of the pain patient which is to provide personalized care. Advances in pain physiology research and pain management technologies support each other concurrently. Summary As new technologies give rise to new perspectives and understanding of pain, new research inspires the development of new technologies
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Affiliation(s)
- Natalie Strand
- Department of Anesthesiology, Division of Pain Medicine, Mayo Clinic, Phoenix, AZ, USA. .,NorthShore University HealthSystem, Evanston, IL, USA. .,University of Chicago Medicine, Chicago, IL, USA.
| | - Maloney J
- Department of Anesthesiology, Division of Pain Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - Vinicius Tieppo Francio
- Department of Rehabilitation Medicine, The University of Kansas Medical Center (KUMC), 3901 Rainbow Blvd. MS1046, Kansas City, KS, 66160, USA
| | - Murphy M
- Department of Rehabilitation Medicine, The University of Kansas Medical Center (KUMC), 3901 Rainbow Blvd. MS1046, Kansas City, KS, 66160, USA
| | | | - Antonios El Helou
- Department of Neurosurgery, The Moncton Hospital, Moncton, NB, Canada
| | - Maita M
- Department of Anesthesiology, Division of Pain Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - Covington S
- Department of Anesthesiology, Division of Pain Medicine, Mayo Clinic, Phoenix, AZ, USA
| | - Singh N
- OrthoAlabama Spine and Sports, Birmingham, AL, USA
| | - Peck J
- Performing Arts Medicine Department, Shenandoah University, Winchester, VA, USA
| | - Wie C
- Department of Anesthesiology, Division of Pain Medicine, Mayo Clinic, Phoenix, AZ, USA
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Harden RN, McCabe CS, Goebel A, Massey M, Suvar T, Grieve S, Bruehl S. Complex Regional Pain Syndrome: Practical Diagnostic and Treatment Guidelines, 5th Edition. PAIN MEDICINE (MALDEN, MASS.) 2022; 23:S1-S53. [PMID: 35687369 PMCID: PMC9186375 DOI: 10.1093/pm/pnac046] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Accepted: 03/15/2022] [Indexed: 11/23/2022]
Abstract
There have been some modest recent advancements in the research of Complex Regional Pain Syndrome, yet the amount and quality of the work in this complicated multifactorial disease remains low (with some notable exceptions; e.g., the recent work on the dorsal root ganglion stimulation). The semi-systematic (though in some cases narrative) approach to review is necessary so that we might treat our patients while waiting for "better research." This semi-systematic review was conducted by experts in the field, (deliberately) some of whom are promising young researchers supplemented by the experience of "elder statesman" researchers, who all mention the system they have used to examine the literature. What we found is generally low- to medium-quality research with small numbers of subjects; however, there are some recent exceptions to this. The primary reason for this paucity of research is the fact that this is a rare disease, and it is very difficult to acquire a sufficient sample size for statistical significance using traditional statistical approaches. Several larger trials have failed, probably due to using the broad general diagnostic criteria (the "Budapest" criteria) in a multifactorial/multi-mechanism disease. Responsive subsets can often be identified in these larger trials, but not sufficient to achieve statistically significant results in the general diagnostic grouping. This being the case the authors have necessarily included data from less compelling protocols, including trials such as case series and even in some instances case reports/empirical information. In the humanitarian spirit of treating our often desperate patients with this rare syndrome, without great evidence, we must take what data we can find (as in this work) and tailor a treatment regime for each patient.
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Affiliation(s)
- R Norman Harden
- Departments of PM&R and Physical Therapy and Human Movement Sciences, Northwestern University
| | - Candida S McCabe
- University of the West of England, Stapleton, Bristol, UK
- Dorothy House Hospice, Bradford-on-Avon, Wilts, UK
| | - Andreas Goebel
- Pain Research Institute, Faculty of Health and Life Science, University of Liverpool, Liverpool, UK
| | - Michael Massey
- CentraCare Neurosciences Pain Center, CentraCare, St. Cloud, Minnesota, USA
| | - Tolga Suvar
- Department of Anesthesiology and Pain Medicine, Rush University Medical Center, Chicago, Illinois, USA
| | - Sharon Grieve
- Royal United Hospitals Bath NHS Foundation Trust, Bath, UK
| | - Stephen Bruehl
- Department of Anesthesiology, Vanderbilt University Medical Centers, Nashville, Tennessee, USA
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35
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Hagedorn JM, Engle AM, George TK, Karri J, Abdullah N, Ovrom E, Bocanegra-Becerra JE, D'Souza RS. An overview of painful diabetic peripheral neuropathy: Diagnosis and treatment advancements. Diabetes Res Clin Pract 2022; 188:109928. [PMID: 35580704 DOI: 10.1016/j.diabres.2022.109928] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 04/12/2022] [Accepted: 05/09/2022] [Indexed: 01/09/2023]
Abstract
Diabetes mellitus remains a public health problem, affecting 422 million people worldwide. Currently, there is no consensus around treating painful diabetic peripheral neuropathy in a step-wise manner. Among the non-pharmacological interventions, neuromodulation has become a promising alternative. Over the past decade, significant clinical trials have paved the way for prompt inclusion of high-frequency spinal cord stimulation within the painful diabetic peripheral neuropathy treatment algorithm. This article aims to provide an updated evidence-based approach for the management of painful diabetic peripheral neuropathy.
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Affiliation(s)
| | - Alyson M Engle
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | | | - Jay Karri
- Johns Hopkins University, Baltimore, MD, USA
| | - Newaj Abdullah
- Division of Pain Medicine, Department of Anesthesiology, University of Utah, Salt Lake City, UT, USA
| | - Erik Ovrom
- Mayo Clinic Alix School of Medicine, Rochester, MN, USA
| | | | - Ryan S D'Souza
- Department of Anesthesiology and Perioperative Medicine, Division of Pain Medicine, Mayo Clinic, Rochester, MN, USA
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36
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Patel M, Aiello M. Successful treatment of acute worsening complex regional pain syndrome in affected dominant right-hand from secondary pathology of new onset third and fourth digit trigger finger. Case Reports Plast Surg Hand Surg 2022; 9:123-125. [PMID: 35530752 PMCID: PMC9067952 DOI: 10.1080/23320885.2022.2063871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
65 year old male with preexisting Complex Regional Pain Syndrome (CRPS) in right dominant hand with sudden onset of right third and fourth digit trigger finger successfully treated with flexor tendon sheath corticosteroid and lidocaine injection resulting in long-term resolution of symptoms without causing widely believed aggravation of CRPS.
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Affiliation(s)
- Monika Patel
- Department of Anesthesiology, Division of Pain Management, University of Florida College of Medicine, Jacksonville, FL, USA
| | - Michael Aiello
- Department of Anesthesiology, University of Florida College of Medicine, Jacksonville, FL, USA
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37
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Potter ST, Welch S, Tata F, Probert S, Nagpal A. Dorsal Root Ganglion Stimulation. Phys Med Rehabil Clin N Am 2022; 33:359-378. [DOI: 10.1016/j.pmr.2022.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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38
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Staudt MD. The Multidisciplinary Team in Pain Management. Neurosurg Clin N Am 2022; 33:241-249. [DOI: 10.1016/j.nec.2022.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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39
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Update on Interventional Management of Neuropathic Pain: A Delphi Consensus of the Spanish Pain Society Neuropathic Pain Task Force. Medicina (B Aires) 2022; 58:medicina58050627. [PMID: 35630044 PMCID: PMC9146461 DOI: 10.3390/medicina58050627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/26/2022] [Accepted: 04/29/2022] [Indexed: 02/07/2023] Open
Abstract
Background and Objectives: Interventional management of neuropathic pain (NP) is available to the patients who do not obtain satisfactory pain relief with pharmacotherapy. Evidence supporting this is sparse and fragmented. We attempted to summarize and critically appraise the existing data to identify strategies that yield the greatest benefit, guide clinicians, and identify areas that merit further investigation. Material and Methods: A two-round Delphi survey that involved pain clinic specialists with experience in the research and management of NP was done over an ad hoc 26-item questionnaire made by the authors. Consensus on each statement was defined as either at least 80% endorsement or rejection after the 2nd round. Results: Thirty-five and 29 panelists participated in the 1st and 2nd round, respectively. Consensus was reached in 20 out of 26 statements. There is sufficient basis to treat postherpetic neuralgias and complex regional pain syndromes with progressive levels of invasiveness and failed back surgery syndrome with neuromodulation. Radiculopathies and localized NP can be treated with peripheral blocks, neuromodulation, or pulsed radiofrequency. Non-ablative radiofrequency and non-paresthetic neuromodulation are efficacious and better tolerated than ablative and suprathreshold procedures. Conclusions: A graded approach, from least to most invasive interventions has the potential to improve outcomes in many patients with common refractory NP conditions. Preliminary promising data warrant further research on new indications, and technical advances might enhance the safety and efficacy of current and future therapies.
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40
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Chapman KB, Yang A, Mogilner AY, Mandelberg N, Patel KV, Lubenow T, Deer T, Kallewaard JW, van Helmond N. Dorsal Root Ganglion Stimulation Device Explantation: A Multicenter Pooled Data Analysis. Pain Pract 2022; 22:522-531. [DOI: 10.1111/papr.13113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 03/08/2022] [Accepted: 04/11/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Kenneth B. Chapman
- The Spine & Pain Institute of New York, NY NY USA
- Department of Anesthesiology, NYU Langone Medical Center, NY NY USA
- Northwell Health New York City NY USA
| | - Ajax Yang
- The Spine & Pain Institute of New York, NY NY USA
- Northwell Health New York City NY USA
| | - Alon Y. Mogilner
- Department of Neurosurgery, NYU Langone Medical Center, NY NY USA
| | | | - Kiran V. Patel
- The Spine & Pain Institute of New York, NY NY USA
- Northwell Health New York City NY USA
| | - Timothy Lubenow
- Department of Anesthesiology Rush University Medical Center Chicago IL
| | - Timothy Deer
- The Spine and Nerve Center of the Virginias Charleston WV
| | | | - Noud van Helmond
- The Spine & Pain Institute of New York, NY NY USA
- Cooper Medical School of Rowan University Cooper University Hospital Camden NJ USA
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41
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Chapman KB, van Helmond N, Kallewaard JW, Vissers KC, Patel KV, Motivala S, Hagedorn JM, Deer TR, Dickerson DM. An Anatomy-Informed, Novel Technique for S1 Dorsal Root Ganglion Stimulation Lead Placement. PAIN MEDICINE 2022; 23:1750-1756. [PMID: 35426940 PMCID: PMC9527614 DOI: 10.1093/pm/pnac062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 03/28/2022] [Accepted: 04/07/2022] [Indexed: 11/23/2022]
Abstract
Objective A heightened and organized understanding of sacral anatomy could potentially lead to a more effective and safe method of dorsal root ganglion stimulation (DRG-S) lead placement. The aim of this technical note is to describe a standardized access method for S1 DRG-S lead placement. Design Technical note. Methods The described approach utilizes alignment of the lumbosacral prominence and is measurement-based, allowing for standardized sacral access, even when visualization is suboptimal. The medial-to-lateral needle trajectory is designed to limit interaction with the sensitive neural structures and allows for a more parallel orientation of the lead to the DRG and nerve root. Conclusions The described technique potentially improves the safety of S1 DRG-S lead placement. The parallel lead orientation to the DRG may also increase efficacy while lowering energy requirements.
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Affiliation(s)
- Kenneth B Chapman
- Correspondence to: Kenneth B. Chapman, MD, The Spine & Pain Institute of New York, 860 Fifth Ave, New York City, NY 10065, USA. Tel: +1.212.724.7246; Fax: 718.727.7474; E-mail:
| | - Noud van Helmond
- The Spine & Pain Institute of New York, New York, New York, USA
- Department of Anesthesiology, Pain, and Palliative Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | | | - Kris C Vissers
- Department of Anesthesiology, Pain, and Palliative Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Kiran V Patel
- The Spine & Pain Institute of New York, New York, New York, USA
- Department of Anesthesiology, NYU Langone Medical Center, New York, New York, USA
- Department of Anesthesiology, Northwell Health, New York, New York, USA
| | - Soriaya Motivala
- Department of Neurosurgery, Northwell Health, New York, New York, USA
| | | | - Timothy R Deer
- The Spine and Nerve Center of the Virginias, Charleston, West Virginia, USA
| | - David M Dickerson
- Department of Anesthesiology, Critical Care and Pain Medicine, NorthShore University Health System, Evanston, Illinois, USA
- Department of Anesthesia & Critical Care, University of Chicago, Chicago, Illinois, USA
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42
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Abd-Elsayed A, Pope J, Mundey DA, Slavin KV, Falowski S, Chitneni A, Popielarski SR, John J, Grodofsky S, Vanetesse T, Fishman MA, Kim P. Diagnosis, Treatment, and Management of Painful Scar: A Narrative Review. J Pain Res 2022; 15:925-937. [PMID: 35411187 PMCID: PMC8994628 DOI: 10.2147/jpr.s355096] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 03/29/2022] [Indexed: 12/26/2022] Open
Abstract
Painful scars can develop after surgery or trauma, with symptoms ranging from a minor itch to intractable allodynia. The problem of the painful scar may involve both intraneural and extraneural structures, requiring a systematic approach to diagnosis and treatment of this neuropathic pain condition that can impact quality of life and function profoundly. In this review, we outline the algorithm for the diagnosis, management, medical and surgical treatment of painful scars.
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Affiliation(s)
- Alaa Abd-Elsayed
- Department of Anesthesia, Division of Pain Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
- Correspondence: Alaa Abd-Elsayed, FASA Department of Anesthesia, Division of Pain Medicine, University of Wisconsin School of Medicine and Public Health, 600 Highland Avenue, B6/319 CSC, Madison, WI, 53792-3272, USA, Tel +1 608-263-8100, Fax +1 608-263-0575, Email
| | - Jason Pope
- Evolve Restorative Center, Santa Rosa, CA, USA
| | | | - Konstantin V Slavin
- Department of Neurosurgery, University of Illinois at Chicago, Chicago, IL, USA
- Neurology Service, Jesse Brown Veterans Administration Medical Center, Chicago, IL, USA
| | | | - Ahish Chitneni
- Department of Rehabilitation and Regenerative Medicine, New York-Presbyterian Hospital - Columbia and Cornell, New York, NY, USA
| | | | - Jarod John
- Argires Marotti Neurosurgical Associates, Lancaster, PA, USA
| | | | - Tony Vanetesse
- Center for Interventional Pain Spine, LLC., Wilmington, DE, USA
| | | | - Philip Kim
- Center for Interventional Pain Spine, LLC., Wilmington, DE, USA
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43
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Strand NH, Burkey AR. Neuromodulation in the Treatment of Painful Diabetic Neuropathy: A Review of Evidence for Spinal Cord Stimulation. J Diabetes Sci Technol 2022; 16:332-340. [PMID: 34842478 PMCID: PMC8861784 DOI: 10.1177/19322968211060075] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
BACKGROUND Neuropathies, the most common complication of diabetes, manifest in various forms, including entrapments, mononeuropathies or, most frequently, a distal symmetric polyneuropathy. Painful diabetic neuropathy (PDN) in the classic "stocking" distribution is a disease of increasing prevalence worldwide and a condition for which standard medical treatment only provides modest relief. Neuromodulation offers a potential alternative to pharmacotherapies given its demonstrated efficacy in other refractory chronic neuropathic pain syndromes. High-quality evidence from randomized controlled trials (RCTs) is available in these other settings for two approaches to spinal cord stimulation (SCS): (1) conventional low-frequency SCS (LF-SCS), which modulates axonal activity in the dorsal column and is paresthesia-dependent, and (2) high-frequency SCS delivered at 10 kilohertz (10 kHz SCS), which targets neurons in the superficial dorsal horn and is paresthesia-independent. METHOD This review examines the evidence for SCS from published RCTs as well as prospective studies exploring the safety and effectiveness of treating PDN with neuromodulation. RESULTS Two RCTs enrolling 60 and 36 participants with PDN showed treatment with LF-SCS reduced daytime pain by 45% to 55% for up to two years. An RCT testing 10 kHz SCS versus conventional medical management (CMM) in 216 participants with PDN revealed 76% mean pain relief after six months of stimulation. None of the studies revealed unexpected safety issues in the use of neuromodulation in this patient population. CONCLUSION These well-designed RCTs address the unmet need for improved PDN therapies and provide data on the safety, effectiveness, and durability of SCS therapy.
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Affiliation(s)
- Natalie H. Strand
- Division of Pain Medicine, Department
of Anesthesiology, Mayo Clinic Arizona, Phoenix, AZ, USA
- Natalie H. Strand, MD, Division of Pain
Medicine, Department of Anesthesiology, Mayo Clinic Arizona, 5777 E. Mayo Blvd,
Phoenix, AZ 85054, USA.
| | - Adam R. Burkey
- Chair of Pain Section, American Academy
of Neurology, Minneapolis, MI, USA
- Anesis Spine & Pain Care, Renton,
WA, USA
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44
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Okumo T, Takayama Y, Maruyama K, Kato M, Sunagawa M. Senso-Immunologic Prospects for Complex Regional Pain Syndrome Treatment. Front Immunol 2022; 12:786511. [PMID: 35069559 PMCID: PMC8767061 DOI: 10.3389/fimmu.2021.786511] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 12/13/2021] [Indexed: 12/14/2022] Open
Abstract
Complex regional pain syndrome (CRPS) is a chronic pain syndrome that occurs in tissue injuries as the result of surgery, trauma, or ischemia. The clinical features of this severely painful condition include redness and swelling of the affected skin. Intriguingly, it was recently suggested that transient receptor potential ankyrin 1 (TRPA1) is involved in chronic post-ischemia pain, a CRPS model. TRPA1 is a non-selective cation channel expressed in calcitonin gene-related peptide (CGRP)-positive primary nociceptors that becomes highly activated in ischemic conditions, leading to the generation of pain. In this review, we summarize the history of TRPA1 and its involvement in pain sensation, inflammation, and CRPS. Furthermore, bone atrophy is also thought to be a characteristic clinical sign of CRPS. The altered bone microstructure of CRPS patients is thought to be caused by aggravated bone resorption via enhanced osteoclast differentiation and activation. Although TRPA1 could be a target for pain treatment in CRPS patients, we also discuss the paradoxical situation in this review. Nociceptor activation decreases the risk of bone destruction via CGRP secretion from free nerve endings. Thus, TRPA1 inhibition could cause severe bone atrophy. However, the suitable therapeutic strategy is controversial because the pathologic mechanisms of bone atrophy in CRPS are unclear. Therefore, we propose focusing on the remission of abnormal bone turnover observed in CRPS using a recently developed concept: senso-immunology.
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Affiliation(s)
- Takayuki Okumo
- Department of Physiology, Showa University School of Medicine, Shinagawa, Japan
| | - Yasunori Takayama
- Department of Physiology, Showa University School of Medicine, Shinagawa, Japan
| | - Kenta Maruyama
- Department of Physiology, Showa University School of Medicine, Shinagawa, Japan.,Division of Cell Signaling, National Institute for Physiological Sciences, Natural Institutes for Natural Sciences, Okazaki, Japan
| | - Mami Kato
- Department of Physiology, Showa University School of Medicine, Shinagawa, Japan.,Department of Molecular and System Pharmacology, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Masataka Sunagawa
- Department of Physiology, Showa University School of Medicine, Shinagawa, Japan
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45
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Graham RD, Sankarasubramanian V, Lempka SF. Dorsal Root Ganglion Stimulation for Chronic Pain: Hypothesized Mechanisms of Action. THE JOURNAL OF PAIN 2022; 23:196-211. [PMID: 34425252 PMCID: PMC8943693 DOI: 10.1016/j.jpain.2021.07.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 06/28/2021] [Accepted: 07/20/2021] [Indexed: 02/03/2023]
Abstract
Dorsal root ganglion stimulation (DRGS) is a neuromodulation therapy for chronic pain that is refractory to conventional medical management. Currently, the mechanisms of action of DRGS-induced pain relief are unknown, precluding both our understanding of why DRGS fails to provide pain relief to some patients and the design of neurostimulation technologies that directly target these mechanisms to maximize pain relief in all patients. Due to the heterogeneity of sensory neurons in the dorsal root ganglion (DRG), the analgesic mechanisms could be attributed to the modulation of one or many cell types within the DRG and the numerous brain regions that process sensory information. Here, we summarize the leading hypotheses of the mechanisms of DRGS-induced analgesia, and propose areas of future study that will be vital to improving the clinical implementation of DRGS. PERSPECTIVE: This article synthesizes the evidence supporting the current hypotheses of the mechanisms of action of DRGS for chronic pain and suggests avenues for future interdisciplinary research which will be critical to fully elucidate the analgesic mechanisms of the therapy.
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Affiliation(s)
- Robert D. Graham
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, United States,Biointerfaces Institute, University of Michigan, Ann Arbor, MI 48109, United States
| | - Vishwanath Sankarasubramanian
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, United States,Biointerfaces Institute, University of Michigan, Ann Arbor, MI 48109, United States
| | - Scott F. Lempka
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, United States,Biointerfaces Institute, University of Michigan, Ann Arbor, MI 48109, United States,Department of Anesthesiology, University of Michigan, Ann Arbor, MI 48109, United States,Corresponding author: Scott F. Lempka, PhD, Department of Biomedical Engineering, University of Michigan, 2800 Plymouth Road, NCRC 14-184, Ann Arbor, MI 48109-2800,
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46
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Prospective Observational Cohort Study on Dorsal Root Ganglion Stimulation in Chronic Postsurgical Pain: Results of Patient-Reported Outcomes at Two Years. Neuromodulation 2022; 25:998-1005. [DOI: 10.1016/j.neurom.2021.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 10/28/2021] [Accepted: 11/02/2021] [Indexed: 11/20/2022]
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47
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Graham RD, Jhand AS, Lempka SF. Dorsal root ganglion stimulation produces differential effects on action potential propagation across a population of biophysically distinct C-neurons. FRONTIERS IN PAIN RESEARCH 2022; 3:1017344. [PMID: 36387415 PMCID: PMC9643723 DOI: 10.3389/fpain.2022.1017344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 10/03/2022] [Indexed: 11/05/2022] Open
Abstract
Dorsal root ganglion stimulation (DRGS) is a neurostimulation therapy used to manage chronic pain that does not respond to conventional therapies. Unfortunately, not all patients receive sufficient pain relief from DRGS, leaving them with few other treatment options. Presently, our understanding of the mechanisms of action of DRGS is incomplete, preventing us from determining why some patients do not receive analgesia from the therapy. One hypothesis suggests that DRGS augments the filtering of action potentials (APs) at the T-junction of nociceptive C-neurons. To test this hypothesis, we utilized a computational modeling approach in which we developed a population of one thousand biophysically distinct C-neuron models which each produced electrophysiological characteristics (e.g., AP height, AP duration) reported in previous experimental studies. We used this population of model C-neurons to study how morphological and electrophysiological characteristics affected the propagation of APs through the T-junction. We found that trains of APs can propagate through the T-junction in the orthodromic direction at a higher frequency than in the antidromic direction due to the decrease in axonal diameter from the peripheral to spinal axon. Including slow outward conductances in the axonal compartments near the T-junction reduced following frequencies to ranges measured experimentally. We next used the population of C-neuron models to investigate how DRGS affected the orthodromic propagation of APs through the T-junction. Our data suggest that suprathreshold DRGS augmented the filtering of APs at the T-junction of some model C-neurons while increasing the activity of other model C-neurons. However, the stimulus pulse amplitudes required to induce activity in C-neurons (i.e., several mA) fell outside the range of stimulation pulse amplitudes used clinically (i.e., typically ≤1 mA). Furthermore, our data suggest that somatic GABA currents activated directly or indirectly by the DRGS pulse may produce diverse effects on orthodromic AP propagation in C-neurons. These data suggest DRGS may produce differential effects across a population of C-neurons and indicate that understanding how inherent biological variability affects a neuron's response to therapeutic electrical stimulation may be helpful in understanding its mechanisms of action.
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Affiliation(s)
- Robert D Graham
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States.,Biointerfaces Institute, University of Michigan, Ann Arbor, MI, United States
| | - Amolak S Jhand
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States.,Biointerfaces Institute, University of Michigan, Ann Arbor, MI, United States
| | - Scott F Lempka
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States.,Biointerfaces Institute, University of Michigan, Ann Arbor, MI, United States.,Department of Anesthesiology, University of Michigan, Ann Arbor, MI, United States
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48
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Dalrymple AN, Ting JE, Bose R, Trevathan JK, Nieuwoudt S, Lempka SF, Franke M, Ludwig KA, Shoffstall AJ, Fisher LE, Weber DJ. Stimulation of the dorsal root ganglion using an Injectrode ®. J Neural Eng 2021; 18. [PMID: 34650008 DOI: 10.1088/1741-2552/ac2ffb] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 10/14/2021] [Indexed: 01/15/2023]
Abstract
Objective. The goal of this work was to compare afferent fiber recruitment by dorsal root ganglion (DRG) stimulation using an injectable polymer electrode (Injectrode®) and a more traditional cylindrical metal electrode.Approach. We exposed the L6 and L7 DRG in four cats via a partial laminectomy or burr hole. We stimulated the DRG using an Injectrode or a stainless steel (SS) electrode using biphasic pulses at three different pulse widths (80, 150, 300μs) and pulse amplitudes spanning the range used for clinical DRG stimulation. We recorded antidromic evoked compound action potentials (ECAPs) in the sciatic, tibial, and common peroneal nerves using nerve cuffs. We calculated the conduction velocity of the ECAPs and determined the charge-thresholds and recruitment rates for ECAPs from Aα, Aβ, and Aδfibers. We also performed electrochemical impedance spectroscopy measurements for both electrode types.Main results. The ECAP thresholds for the Injectrode did not differ from the SS electrode across all primary afferents (Aα, Aβ, Aδ) and pulse widths; charge-thresholds increased with wider pulse widths. Thresholds for generating ECAPs from Aβfibers were 100.0 ± 32.3 nC using the SS electrode, and 90.9 ± 42.9 nC using the Injectrode. The ECAP thresholds from the Injectrode were consistent over several hours of stimulation. The rate of recruitment was similar between the Injectrodes and SS electrode and decreased with wider pulse widths.Significance. The Injectrode can effectively excite primary afferents when used for DRG stimulation within the range of parameters used for clinical DRG stimulation. The Injectrode can be implanted through minimally invasive techniques while achieving similar neural activation to conventional electrodes, making it an excellent candidate for future DRG stimulation and neuroprosthetic applications.
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Affiliation(s)
- Ashley N Dalrymple
- Department of Mechanical Engineering, Carnegie Mellon University, 5000 Forbes Ave, Wean 1323, Pittsburgh, PA 15217, United States of America.,Rehab Neural Engineering Labs, University of Pittsburgh, Pittsburgh, PA, 15217, United States of America
| | - Jordyn E Ting
- Rehab Neural Engineering Labs, University of Pittsburgh, Pittsburgh, PA, 15217, United States of America.,Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, United States of America.,Center for Neural Basis of Cognition, Pittsburgh, PA, 15217, United States of America
| | - Rohit Bose
- Rehab Neural Engineering Labs, University of Pittsburgh, Pittsburgh, PA, 15217, United States of America.,Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, United States of America.,Center for Neural Basis of Cognition, Pittsburgh, PA, 15217, United States of America
| | - James K Trevathan
- Departments of Biomedical Engineering and Neurological Surgery, University of Wisconsin-Madison, Madison, WI, United States of America
| | | | - Scott F Lempka
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States of America
| | | | - Kip A Ludwig
- Departments of Biomedical Engineering and Neurological Surgery, University of Wisconsin-Madison, Madison, WI, United States of America.,Neuronoff Inc., Cleveland, OH, United States of America.,Wisconsin Institute for Translational Neuroengineering (WITNe), Madison, WI, United States of America
| | - Andrew J Shoffstall
- Neuronoff Inc., Cleveland, OH, United States of America.,Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States of America
| | - Lee E Fisher
- Rehab Neural Engineering Labs, University of Pittsburgh, Pittsburgh, PA, 15217, United States of America.,Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, United States of America.,Center for Neural Basis of Cognition, Pittsburgh, PA, 15217, United States of America.,Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA, United States of America
| | - Douglas J Weber
- Department of Mechanical Engineering, Carnegie Mellon University, 5000 Forbes Ave, Wean 1323, Pittsburgh, PA 15217, United States of America.,Rehab Neural Engineering Labs, University of Pittsburgh, Pittsburgh, PA, 15217, United States of America.,Center for Neural Basis of Cognition, Pittsburgh, PA, 15217, United States of America.,Neuroscience Institute, Carnegie Mellon University, 5000 Forbes Ave, Wean 1323, Pittsburgh, PA 15217, United States of America
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49
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Chaudhry SR, Stadlbauer A, Buchfelder M, Kinfe TM. Melatonin Moderates the Triangle of Chronic Pain, Sleep Architecture and Immunometabolic Traffic. Biomedicines 2021; 9:984. [PMID: 34440187 PMCID: PMC8392406 DOI: 10.3390/biomedicines9080984] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 07/23/2021] [Accepted: 08/01/2021] [Indexed: 12/30/2022] Open
Abstract
Preclinical as well as human studies indicate that melatonin is essential for a physiological sleep state, promotes analgesia and is involved in immunometabolic signaling by regulating neuroinflammatory pathways. Experimental and clinical neuromodulation studies for chronic pain treatment suggest that neurostimulation therapies such as spinal cord stimulation, vagus nerve stimulation and dorsal root ganglion stimulation have an impact on circulating inflammatory mediators in blood, cerebrospinal fluid and saliva. Herein, we provide an overview of current literature relevant for the shared pathways of sleep, pain and immunometabolism and elaborate the impact of melatonin on the crossroad of sleep, chronic pain and immunometabolism. Furthermore, we discuss the potential of melatonin as an adjunct to neurostimulation therapies. In this narrative review, we addressed these questions using the following search terms: melatonin, sleep, immunometabolism, obesity, chronic pain, neuromodulation, neurostimulation, neuroinflammation, molecular inflammatory phenotyping. So far, the majority of the published literature is derived from experimental studies and studies specifically assessing these relationships in context to neurostimulation are sparse. Thus, the adjunct potential of melatonin in clinical neurostimulation has not been evaluated under the umbrella of randomized-controlled trials and deserves increased attention as melatonin interacts and shares pathways relevant for noninvasive and invasive neurostimulation therapies.
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Affiliation(s)
- Shafqat R. Chaudhry
- Department of Basic Medical Sciences, Shifa College of Pharmaceutical Sciences, Shifa Tameer-e-Millat University, Islamabad 44000, Pakistan;
| | - Andreas Stadlbauer
- Department of Neurosurgery, Medical Faculty, Friedrich-Alexander University (FAU) of Erlangen-Nürnberg, D-91054 Erlangen, Germany; (A.S.); (M.B.)
| | - Michael Buchfelder
- Department of Neurosurgery, Medical Faculty, Friedrich-Alexander University (FAU) of Erlangen-Nürnberg, D-91054 Erlangen, Germany; (A.S.); (M.B.)
| | - Thomas M. Kinfe
- Department of Neurosurgery, Medical Faculty, Friedrich-Alexander University (FAU) of Erlangen-Nürnberg, D-91054 Erlangen, Germany; (A.S.); (M.B.)
- Division of Functional Neurosurgery and Stereotaxy, Medical Faculty, Friedrich-Alexander University (FAU) of Erlangen-Nürnberg, D-91054 Erlangen, Germany
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50
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Lam CM, Zayed H, Sayed D. High frequency dorsal column spinal cord stimulation for management of erythromelalgia. BMJ Case Rep 2021; 14:14/8/e244758. [PMID: 34353840 PMCID: PMC8344303 DOI: 10.1136/bcr-2021-244758] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Erythromelalgia is a rare hereditary channelopathy affecting the Nav1.7 sodium channel. Patients afflicted with this condition suffer from pain in their hands and feet, with vasomotor changes including flushing and redness to the distal upper and lower extremities. Current treatment modalities for this condition include pharmacological therapies (neuropathic medications), behavioural interventions, lumbar epidural infusions with local anaesthetics and sympathetic nerve blocks. Despite these treatments, many patients may have refractory pain. In these situations, there may be a role for dorsal column spinal cord stimulation for management of their pain. Here, we present the case of a 21-year-old man with 9-year history of refractory erythromelalgia successfully treated with paresthesia-free dorsal column spinal cord stimulation.
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Affiliation(s)
- Christopher M Lam
- Anesthesiology, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Hadi Zayed
- University of Kansas Medical Center School of Medicine, Kansas City, Kansas, USA
| | - Dawood Sayed
- Anesthesiology, University of Kansas Medical Center, Kansas City, Kansas, USA
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