1
|
Santyr B, Abbass M, Chalil A, Vivekanandan A, Tindale M, Boulis NM, Lau JC. Surgical Interventions Targeting the Nucleus Caudalis for Craniofacial Pain: A Systematic and Historical Review. Neuromodulation 2023; 26:1480-1492. [PMID: 36192281 DOI: 10.1016/j.neurom.2022.08.454] [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: 05/06/2022] [Revised: 07/22/2022] [Accepted: 08/22/2022] [Indexed: 06/16/2023]
Abstract
INTRODUCTION Craniofacial pain is a prevalent group of conditions, and when refractory to conventional treatments, it poses a significant burden. The last decade has seen a renewed interest in the multimodal management of pain. Interventions targeting the nucleus caudalis (NC) of the trigeminocervical complex have been available as a treatment option since the 1930s, yet evidence for efficacy remains limited. MATERIALS AND METHODS We present a systematic review of the literature providing a historical perspective on interventions targeting the NC leading up to the present. We examine the various intervention techniques, clinical indications, and procedural efficacy. A novel outcome-reporting scheme was devised to enable comparison among studies owing to historically variable reporting methods. RESULTS A review of the literature revealed 33 retrospective studies published over the last 80 years, reporting on 827 patients. The most common technique was the open NC dorsal root entry zone nucleotomy/tractotomy; however, there has been an emergence of novel approaches such as endoscopic and spinal cord stimulation in the last ten years. Regardless of intervention technique or preoperative diagnosis, 87% of patients showed improvement with treatment. CONCLUSIONS The literature surrounding NC intervention techniques is reviewed. Recent advancements and the wide range of craniofacial pain syndromes for which these interventions show potential efficacy are discussed. New and less invasive techniques continue to emerge as putative therapeutic options. However, prospective studies are lacking. Furthermore, the evidence supporting even well-established techniques remains of poor quality. Future work should be prospective, use standard outcome reporting, and address efficacy comparisons between intervention type and preoperative diagnosis.
Collapse
Affiliation(s)
- Brendan Santyr
- Division of Neurosurgery, Department of Clinical Neurological Sciences, Western University, London, Ontario, Canada
| | - Mohamad Abbass
- Division of Neurosurgery, Department of Clinical Neurological Sciences, Western University, London, Ontario, Canada
| | - Alan Chalil
- Division of Neurosurgery, Department of Clinical Neurological Sciences, Western University, London, Ontario, Canada
| | - Amirti Vivekanandan
- Division of Neurosurgery, Department of Clinical Neurological Sciences, Western University, London, Ontario, Canada
| | - Margaret Tindale
- Division of Emergency Medicine, Western University, London, Ontario, Canada
| | | | - Jonathan C Lau
- Division of Neurosurgery, Department of Clinical Neurological Sciences, Western University, London, Ontario, Canada.
| |
Collapse
|
2
|
Anisimov ED, Rzaev JA, Moysak GI, Dmitriev AB, Duff IE, Slavin KV. Open and Percutaneous Trigeminal Nucleotractotomy: A Case Series and Literature Review. Stereotact Funct Neurosurg 2023; 101:387-394. [PMID: 37931603 DOI: 10.1159/000534488] [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: 06/30/2023] [Accepted: 10/01/2023] [Indexed: 11/08/2023]
Abstract
INTRODUCTION Nucleotractotomy is an efficient surgical technique that provides a high pain relief rate for specific clinical indications. There are two main approaches for performing this operation: an open and percutaneous technique. METHODS In the Federal Center of Neurosurgery (Novosibirsk, Russia) from 2016 to 2022, 13 trigeminal nucleotractotomies (7 open and 6 percutaneous) were performed in 12 patients (5 women and 7 men). The indications for surgery were deafferentation pain and chronic drug-resistant pain syndrome caused by malignancy in the facial region. A neurological examination was done on each patient 1 day before the surgery, right after the surgery, and at the follow-up (examinations were done after 1, 6, and 12 months, or when the patient independently applied to our hospital). In the early postoperative period, patients underwent brain MRI. RESULTS The average pain intensity score before nucleotractotomy on the 11-point (0-10) visual analog scale (VAS) was 9.3. The effectiveness of open interventions was somewhat higher; the average VAS score in the early postoperative period for the open technique was 1.57, in the group of patients who underwent percutaneous nucleotractotomy were 2.66. Complete regression of the pain syndrome was achieved in 6 patients; in 5 patients, the pain in the face decreased by more than 50%. One case had an unsatisfactory outcome. In the open-surgery group in the early postoperative period, according to MRI, the average length of the visualized area of signal change was longer (21.5 mm, the average diameter was 3.75 mm) than in a percutaneous nucleotractotomy group (16 mm, the average diameter was 3.75 mm). During the postoperative period (average follow-up 40 months), the pain recurred in 3 patients (30%): 2 patients after percutaneous nucleotractotomy (3 and 18 months after surgery) and in 1 patient 4 months after the open surgery. The mean VAS score at the last follow-up was 2.6. CONCLUSION Trigeminal nucleotractotomy is an effective approach to the treatment of intractable facial pain. Our experience suggests this technique is highly effective in patients with drug-resistant pain caused by craniofacial tumors and deafferentation conditions after treating trigeminal neuralgia.
Collapse
Affiliation(s)
| | - Jamil A Rzaev
- Federal Neurosurgical Center, Ministry of Health of Russia, Novosibirsk, Russian Federation
| | - Galina I Moysak
- Federal Neurosurgical Center, Ministry of Health of Russia, Novosibirsk, Russian Federation
| | - Alexander B Dmitriev
- Federal Neurosurgical Center, Ministry of Health of Russia, Novosibirsk, Russian Federation
| | - Irina E Duff
- Department of Neurosurgery, Johns Hopkins University, Baltimore, Maryland, USA
| | - Konstantin V Slavin
- Department of Neurosurgery, University of Illinois at Chicago, Chicago, Illinois, USA
- Neurology Service, Jesse Brown Veterans Administration Medical Center, Chicago, Illinois, USA
| |
Collapse
|
3
|
Widerström-Noga E. Neuropathic Pain and Spinal Cord Injury: Management, Phenotypes, and Biomarkers. Drugs 2023:10.1007/s40265-023-01903-7. [PMID: 37326804 DOI: 10.1007/s40265-023-01903-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/29/2023] [Indexed: 06/17/2023]
Abstract
Chronic neuropathic pain after a spinal cord injury (SCI) continues to be a complex condition that is difficult to manage due to multiple underlying pathophysiological mechanisms and the association with psychosocial factors. Determining the individual contribution of each of these factors is currently not a realistic goal; however, focusing on the primary mechanisms may be more feasible. One approach used to uncover underlying mechanisms includes phenotyping using pain symptoms and somatosensory function. However, this approach does not consider cognitive and psychosocial mechanisms that may also significantly contribute to the pain experience and impact treatment outcomes. Indeed, clinical experience supports that a combination of self-management, non-pharmacological, and pharmacological approaches is needed to optimally manage pain in this population. This article will provide a broad updated summary integrating the clinical aspects of SCI-related neuropathic pain, potential pain mechanisms, evidence-based treatment recommendations, neuropathic pain phenotypes and brain biomarkers, psychosocial factors, and progress regarding how defining neuropathic pain phenotypes and other surrogate measures in the neuropathic pain field may lead to targeted treatments for neuropathic pain after SCI.
Collapse
Affiliation(s)
- Eva Widerström-Noga
- The Miami Project to Cure Paralysis, University of Miami, 1611 NW 12th Avenue, Miami, FL, 33136, USA.
- Department of Neurological Surgery, University of Miami, 1095 NW 14th Terrace, Miami, FL, 33136, USA.
| |
Collapse
|
4
|
Basha AKMM, Simry HAM, Abdelbar AE, Sabry H, Raslan AM. Outcome of Surgical Treatments of Chronic Pain Caused by Trigeminal Neuropathy. World Neurosurg 2023; 170:e57-e69. [PMID: 36273728 DOI: 10.1016/j.wneu.2022.10.057] [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: 08/31/2022] [Accepted: 10/17/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND Trigeminal neuropathy represents a subset of several facial pain syndromes that are difficult to diagnose and treat. Although many surgical modalities are available, outcomes remain suboptimal. The aim of this study is to present our experience in management of trigeminal neuropathy with a focus on the effectiveness and long-term efficacy of the different surgical procedures. METHODS A single-center retrospective cohort study was conducted from December 2012 until February 2020. RESULTS Twenty-eight patients (19 females, 9 males) were included in this study. They had 40 surgical interventions. At last follow-up, 1 patient (33.3%) treated by spinal cord stimulation (SCS) had no pain recurrence and 2 patients (66.6%) had their devices removed because of therapeutic failure. Median time to pain recurrence after SCS was 19.5 months (interquartile range [IQR], 29.79 months). Six patients were treated with peripheral nerve stimulation (PNS). At last follow-up, 2 patients had satisfactory pain relief, whereas half of the patients had no improvement. For the 17 patients treated with computed tomography-guided trigeminal tractotomy/nucleotomy, true failure occurred 7 times in 6 patients. Median time to pain recurrence was 5.6 months (IQR, 6.2). Of the 6 patients treated with caudalis DREZ, 3 (50%) had satisfactory pain relief for >1 year and the median time to pain recurrence was 3.9 months (IQR, 29.53). CONCLUSIONS Trigeminal neuropathy is a difficult to treat entity of facial pain syndromes. The long-term efficacy of available interventions does not meet patients' satisfaction. More organized prospective studies with longer follow-up are needed to define the patient population best served by each surgical modality.
Collapse
Affiliation(s)
| | | | | | - Hatem Sabry
- Department of Neurosurgery, Ain Shams University, Cairo, Egypt
| | - Ahmed M Raslan
- Department of Neurosurgery, Oregon Health and Science University, Oregon, Portland, USA
| |
Collapse
|
5
|
Penn MC, Choi W, Brasfield K, Wu K, Briggs RG, Dallapiazza R, Russin JJ, Giannotta SL, Lee DJ. A Review of Medical and Surgical Options for the Treatment of Facial Pain. Otolaryngol Clin North Am 2022; 55:607-632. [PMID: 35490039 DOI: 10.1016/j.otc.2022.03.001] [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: 10/18/2022]
Abstract
Facial pain is a common medical complaint that is easily misdiagnosed. As a result, this pain often goes mistreated. Despite this, there are a variety of pharmacologic, surgical, and neuromodulatory options for the treatment of facial pain. In this review, the authors detail the forms of facial pain and their treatment options. They discuss the common medications used in the first-line treatment of facial pain and the second-line surgical and neuromodulatory options available to patients when pharmacologic options fail.
Collapse
Affiliation(s)
- Marisa C Penn
- Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Wooseong Choi
- Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Kaevon Brasfield
- Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Kevin Wu
- Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Robert G Briggs
- Department of Neurological Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.
| | - Robert Dallapiazza
- Department of Neurological Surgery, Tulane School of Medicine, Tulane University, New Orleans, LA, USA
| | - Jonathan J Russin
- Department of Neurological Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA; Neurorestoration Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Steven L Giannotta
- Department of Neurological Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Darrin J Lee
- Department of Neurological Surgery, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA; Neurorestoration Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| |
Collapse
|
6
|
Chen Y, Wu Q, Jin Z, Qin Y, Meng F, Zhao G. Systematic Review of Voltage-Gated Calcium Channel α2δ Subunit Ligands for the Treatment of Chronic Neuropathic Pain and Insight into Structure-Activity Relationship (SAR) by Pharmacophore Modeling. Curr Med Chem 2022; 29:5097-5112. [PMID: 35392779 DOI: 10.2174/0929867329666220407093727] [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: 10/20/2021] [Revised: 01/20/2022] [Accepted: 02/07/2022] [Indexed: 11/22/2022]
Abstract
BACKGROUND Neuropathic pain (NP) is a complex symptom related to the nerve damage. The discovery of new drugs for treating chronic NP has been continuing for several decades, while more progress is still needed to be made because of the unsatisfactory efficacy and the side effects of the currently available drugs. Among all the approved drugs for chronic NP, voltage-gated calcium channel (VGCC) α2δ subunit ligands, also known as gabapentinoids, are among the first-line treatment and represent a class of efficacious and relatively safe therapeutic agents. However, new strategies are still needed to be explored due to the unsatisfied response rate. OBJECTIVES To review the latest status of the discovery and development of gabapentinoids for the treatment of chronic NP by covering both the marketed and the preclinical/clinical ones. To analyze the structure-activity relationship (SAR) of gabapentinoids to facilitate the future design of structurally novel therapeutic agents targeting VGCC α2δ subunit. METHODS We searched PubMed Central, Embase, Cochrane Library, Web of Science, Scopus and Espacenet for the literature and patents of diabetic peripheral neuropathic pain, postherpetic neuralgia, fibromyalgia, voltage-gated calcium channel α2δ subunit and related therapeutic agents from incipient to June 10, 2021. The SAR of gabapentinoids were analyzed by pharmacophore modeling using Phase module in Schrödinger suite. RESULTS A variety of gabapentinoids were identified as VGCC α2δ ligands that have ever been under development for the treatment of chronic NP. Among them, four gabapentinoids are marketed, one is at the active late clinical trials, and eight have been discontinued. Pharmacophore models were generated by using Phase module in Schrödinger suite, and common pharmacophores were predicted based on pharmacophoric features and analyzed. CONCLUSION The latest progress of the discovery and development of gabapentinoids for the treatment of chronic NP was reviewed. Moreover, the structure-activity relationship (SAR) of gabapentinoids is analyzed by pharmacophore modeling, which will be valuable for the future design of structurally novel therapeutic agents targeting VGCC α2δ subunit.
Collapse
Affiliation(s)
- Yuting Chen
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan 528400, China
| | - Qingqing Wu
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan 528400, China
| | - Zhengsheng Jin
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan 528400, China
| | - Yanlan Qin
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan 528400, China
| | - Fancui Meng
- Tianjin Institute of Pharmaceutical Research, Tianjin 300301, China
| | - Guilong Zhao
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan 528400, China
| |
Collapse
|
7
|
The CanPain SCI clinical practice guidelines for rehabilitation management of neuropathic pain after spinal cord injury: 2021 update. Spinal Cord 2022; 60:548-566. [PMID: 35124700 PMCID: PMC9209331 DOI: 10.1038/s41393-021-00744-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 12/23/2021] [Accepted: 12/24/2021] [Indexed: 12/23/2022]
Abstract
STUDY DESIGN Clinical practice guidelines. OBJECTIVES The objective was to update the 2016 version of the Canadian clinical practice guidelines for the management of neuropathic pain in people with spinal cord injury (SCI). SETTING The guidelines are relevant for inpatient, outpatient and community SCI rehabilitation settings in Canada. METHODS The guidelines were updated in accordance with the Appraisal of Guidelines for Research and Evaluation II tool. A Steering Committee and Working Group reviewed the relevant evidence on neuropathic pain management (encompassing screening and diagnosis, treatment and models of care) after SCI. The quality of evidence was scored using Grading of Recommendations Assessment, Development and Evaluation (GRADE). A consensus process was followed to achieve agreement on recommendations and clinical considerations. RESULTS The working group identified and reviewed 46 additional relevant articles published since the last version of the guidelines. The panel agreed on 3 new screening and diagnosis recommendations and 8 new treatment recommendations. Two key changes to these treatment recommendations included the introduction of general treatment principles and a new treatment recommendation classification system. No new recommendations to model of care were made. CONCLUSIONS The CanPainSCI recommendations for the management of neuropathic pain after SCI should be used to inform practice.
Collapse
|
8
|
Chalil A, Wang Q, Abbass M, Santyr BG, MacDougall KW, Staudt MD. Dorsal Root Entry Zone Lesioning for Brachial Plexus Avulsion Injuries: Case Series and Literature Review. FRONTIERS IN PAIN RESEARCH 2021; 2:749801. [PMID: 35295454 PMCID: PMC8915773 DOI: 10.3389/fpain.2021.749801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 10/26/2021] [Indexed: 11/13/2022] Open
Abstract
Introduction: Brachial plexus avulsion (BPA) injuries commonly occur secondary to motor vehicle collisions, usually in the young adult population. These injuries are associated with significant morbidity, and up to 90% of patients suffer from deafferentation pain. Neuromodulation procedures can be efficacious in the treatment of refractory neuropathic pain, although the treatment of pain due to BPA can be challenging. Dorsal root entry zone (DREZ) lesioning is a classical and effective neurosurgical technique which has become underutilized in treating refractory root avulsion pain. Methods: A systematic review of the different technical nuances, procedural efficacy, and complication profiles regarding DREZ lesioning for BPA injuries in the literature is included. We also present an institutional case series of 7 patients with BPA injuries who underwent DREZ lesioning. Results: In the literature, 692 patients were identified to have undergone DREZ lesioning for pain related to BPA. In 567 patients, the surgery was successful in reducing pain intensity by over 50% in comparison to baseline (81.9%). Complications included transient motor deficits (11%) and transient sensory deficits (11%). Other complications including permanent disability, cardiovascular complications, infections, or death were rare (<1.9%). In our case series, all but one patient achieved >50% reduction in pain intensity, with the mean pre-operative pain of 7.9 ± 0.63 (visual analog scale) reduced to 2.1 ± 0.99 at last follow-up (p < 0.01). Conclusion: Both the literature and the current case series demonstrate excellent pain severity reduction following DREZ ablation for deafferentation pain secondary to BPA.
Collapse
Affiliation(s)
- Alan Chalil
- Department of Clinical Neurological Sciences, London Health Sciences Centre, Western University, London, ON, Canada
| | - Qian Wang
- Department of Clinical Neurological Sciences, London Health Sciences Centre, Western University, London, ON, Canada
| | - Mohamad Abbass
- Department of Clinical Neurological Sciences, London Health Sciences Centre, Western University, London, ON, Canada
| | - Brendan G. Santyr
- Department of Clinical Neurological Sciences, London Health Sciences Centre, Western University, London, ON, Canada
| | - Keith W. MacDougall
- Department of Clinical Neurological Sciences, London Health Sciences Centre, Western University, London, ON, Canada
| | - Michael D. Staudt
- Department of Neurosurgery, Oakland University William Beaumont School of Medicine, Rochester, MI, United States
- Michigan Head and Spine Institute, Southfield, MI, United States
- *Correspondence: Michael D. Staudt
| |
Collapse
|
9
|
Mongardi L, Visani J, Mantovani G, Vitali C, Ricciardi L, Giordano F, Cavallo MA, Lofrese G, D'andrea M, Roblot P, De Bonis P, Scerrati A. Long term results of Dorsal Root Entry Zone (DREZ) lesions for the treatment of intractable pain: A systematic review of the literature on 1242 cases. Clin Neurol Neurosurg 2021; 210:107004. [PMID: 34739884 DOI: 10.1016/j.clineuro.2021.107004] [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: 08/29/2021] [Revised: 10/12/2021] [Accepted: 10/13/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Different Dorsal root entry zone (DREZ) lesion techniques have been reported as effective treatment for intractable painful conditions, though with contradictory results. Overall, good results were reported especially in specific conditions, such as pain due to brachial plexus avulsion, spinal cord injuries and oncological pain management. However, data on long term results in different clinical conditions are still missing. OBJECTIVE This study aims to systematically review the pertinent literature to evaluate indications, clinical outcomes, and complications of DREZ lesion (DREZotomy), in chronic pain management. METHODS A systematic literature review was conducted according to the PRISMA statement. Papers on DREZotomy for chronic pain in cancer, brachial plexus avulsion, spinal cord injury, post herpetic neuralgia, and phantom limb pain were considered for eligibility. For each category we further identified two sub-group according to the length of follow up: medium term and long term follow up (more than 3 years) respectively. RESULTS 46 papers, and 1242 patients, were included in the present investigation. When considering long term results DREZotomy provided favorable clinical outcomes in brachial plexus avulsion and spinal cord injury, in 60.8% and 55.8% of the cases respectively. Conversely, the success rate was 35.3% in phantom limb pain and 28.2% in post herpetic neuralgia. A poor clinical outcome was reported in over than 25% of the patients suffering from phantom limb pain, post herpetic neuralgia and spinal cord injury. The mean complications rate was 23.58%. While BPA and SCI patients presented stable improvement over time, good outcomes among PHN and PLP groups dropped by - 46.2%; and - 14.7% at long term follow up respectively. CONCLUSION DREZotomy seems to be an effective treatment for chronic pain conditions, especially for brachial plexus avulsion, spinal cord injury and intractable cancer/post-radiation pain. According to the low level of evidence of the pertinent literature, further studies are strongly recommended, to better define potential benefits and limitations of this technique.
Collapse
Affiliation(s)
- Lorenzo Mongardi
- Department of Neurosurgery, Sant'Anna University Hospital, Ferrara, Italy.
| | - Jacopo Visani
- Department of Neurosurgery, Sant'Anna University Hospital, Ferrara, Italy
| | - Giorgio Mantovani
- Department of Neurosurgery, Sant'Anna University Hospital, Ferrara, Italy
| | - Costanza Vitali
- Department of Morphology, Surgery and Experimental Medicine, Section of Anaesthesia and Intensive Care, Azienda Ospedaliero-Universitaria Sant' Anna, University of Ferrara, Ferrara, Italy
| | - Luca Ricciardi
- UO di Neurochirurgia, Pia Fondazione di Culto e Religione Cardinal G. Panico, Tricase, LE, Italy
| | - Flavio Giordano
- Department of Neurosurgery, Children's Hospital A. Meyer, University of Florence, Florence, Italy
| | - Michele Alessandro Cavallo
- Department of Neurosurgery, Sant'Anna University Hospital, Ferrara, Italy; Department of Morphology, Surgery and Experimental Medicine, University of Ferrara, Italy
| | | | | | - Paul Roblot
- Department of Neurosurgery, University Hospital of Bordeaux, Bordeaux, France
| | - Pasquale De Bonis
- Department of Neurosurgery, Sant'Anna University Hospital, Ferrara, Italy; Department of Morphology, Surgery and Experimental Medicine, University of Ferrara, Italy
| | - Alba Scerrati
- Department of Neurosurgery, Sant'Anna University Hospital, Ferrara, Italy; Department of Morphology, Surgery and Experimental Medicine, University of Ferrara, Italy
| |
Collapse
|
10
|
Gebreyohanes AMH, Ahmed AI, Choi D. Dorsal Root Entry Zone Lesioning for Brachial Plexus Avulsion: A Comprehensive Literature Review. Oper Neurosurg (Hagerstown) 2021; 20:324-333. [PMID: 33469654 DOI: 10.1093/ons/opaa447] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 10/23/2020] [Indexed: 11/14/2022] Open
Abstract
Dorsal root entry zone (DREZ) lesioning is a neurosurgical procedure that aims to relieve severe neuropathic pain in patients with brachial plexus avulsion by selectively destroying nociceptive neural structures in the posterior cervical spinal cord. Since the introduction of the procedure over 4 decades ago, the DREZ lesioning technique has undergone numerous modifications, with a variety of center- and surgeon-dependent technical differences and patient outcomes. We have reviewed the literature to discuss reported methods of DREZ lesioning and outcomes.
Collapse
Affiliation(s)
- Axumawi Mike Hailu Gebreyohanes
- Victor Horsley Department of Neurosurgery, The National Hospital for Neurology and Neurosurgery, London, United Kingdom.,University College London (UCL) Medical School, London, United Kingdom
| | - Aminul Islam Ahmed
- Victor Horsley Department of Neurosurgery, The National Hospital for Neurology and Neurosurgery, London, United Kingdom
| | - David Choi
- Victor Horsley Department of Neurosurgery, The National Hospital for Neurology and Neurosurgery, London, United Kingdom
| |
Collapse
|
11
|
Poth KM, Texakalidis P, Boulis NM. Chemogenetics: Beyond Lesions and Electrodes. Neurosurgery 2021; 89:185-195. [PMID: 33913505 PMCID: PMC8279839 DOI: 10.1093/neuros/nyab147] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 02/26/2021] [Indexed: 01/14/2023] Open
Abstract
The field of chemogenetics has rapidly expanded over the last decade, and engineered receptors are currently utilized in the lab to better understand molecular interactions in the nervous system. We propose that chemogenetic receptors can be used for far more than investigational purposes. The potential benefit of adding chemogenetic neuromodulation to the current neurosurgical toolkit is substantial. There are several conditions currently treated surgically, electrically, and pharmacologically in clinic, and this review highlights how chemogenetic neuromodulation could improve patient outcomes over current neurosurgical techniques. We aim to emphasize the need to take these techniques from bench to bedside.
Collapse
Affiliation(s)
- Kelly M Poth
- Department of Neurosurgery, Emory University, Atlanta, Georgia, USA
| | | | | |
Collapse
|
12
|
Visnjevac O, Ma F, Abd-Elsayed A. A Literature Review of Dorsal Root Entry Zone Complex (DREZC) Lesions: Integration of Translational Data for an Evolution to More Accurate Nomenclature. J Pain Res 2021; 14:1-12. [PMID: 33442287 PMCID: PMC7800708 DOI: 10.2147/jpr.s255726] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 11/30/2020] [Indexed: 12/18/2022] Open
Abstract
The purpose of this translational review was to provide evidence to support the natural evolution of the nomenclature of neuromodulatory and neuroablative radiofrequency lesions for pain management from lesions of individualized components of the linear dorsal afferent pathway to “Dorsal Root Entry Zone Complex (DREZC) lesions.” Literature review was performed to collate anatomic and procedural data and correlate these data to clinical outcomes. There is ample evidence that the individual components of the DREZC (the dorsal rami and its branches, the dorsal root ganglia, the dorsal rootlets, and the dorsal root entry zone) vary dramatically between vertebral levels and individual patients. Procedurally, fluoroscopy, the most commonly utilized technology is a 2-dimensional x-ray-based technology without the ability to accurately locate any one component of the DREZC dorsal afferent pathway, which results in clinical inaccuracies when naming each lesion. Despite the inherent anatomic variability and these procedural limitations, the expected poor clinical outcomes that might follow such nomenclature inaccuracies have not been shown to be prominent, likely because these are all lesions of the same anatomically linear sensory pathway, the DREZC, whereby a lesion in any one part of the pathway would be expected to interrupt sensory transmission of pain to all subsequent more proximal segments. Given that the common clinically available tools (fluoroscopy) are inaccurate to localize each component of the DREZC, it would be inappropriate to continue to erroneously refer to these lesions as lesions of individual components, when the more accurate “DREZC lesions” designation can be utilized. Hence, to avoid inaccuracies in nomenclature and until more accurate imaging technology is commonly utilized, the evidence herein supports the proposed change to this more sensitive and inclusive nomenclature, “DREZC lesions.” ![]()
Point your SmartPhone at the code above. If you have a QR code reader the video abstract will appear. Or use: https://youtu.be/BVBDOHy-eAI.
Collapse
Affiliation(s)
- Ognjen Visnjevac
- Department of Anesthesia, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada.,Cleveland Clinic Canada, Toronto, Ontario, Canada.,Spine Pain Program, Bloor Pain Specialists, Toronto, Ontario, Canada
| | - Frederick Ma
- Spine Pain Program, Bloor Pain Specialists, Toronto, Ontario, Canada
| | - Alaa Abd-Elsayed
- Department of Anesthesiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| |
Collapse
|
13
|
Texakalidis P, Tora M, Boulis N. Neurosurgeons’ Armamentarium for the Management of Refractory Postherpetic Neuralgia: A Systematic Literature Review. Stereotact Funct Neurosurg 2019; 97:55-65. [DOI: 10.1159/000499476] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 03/04/2019] [Indexed: 11/19/2022]
|
14
|
Bing N, Yonsheng H, Wei T, Wei S, Hongwei Z. Dorsal Root Entry Zone Lesion for Neuropathic Pain Due to Thoracolumbar Spine Fracture: Long-Term Result. World Neurosurg 2019; 125:e1050-e1056. [PMID: 30776514 DOI: 10.1016/j.wneu.2019.01.242] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 01/22/2019] [Accepted: 01/23/2019] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To retrospectively evaluate long-term efficacy and safety of dorsal root entry zone (DREZ) lesion for treatment of neuropathic pain within the lower extremities and perineal region after thoracolumbar spine fracture. METHODS Forty-two patients were treated with posterior laminectomy under general anesthesia. The DREZ regions of the spinal cord segments were ablated under a microscope. Data regarding pain relief, pain variation over time, and postoperative complications were collected. The relationship between injured spinal column segment, spinal cord, nerve root, and pain territory were analyzed retrospectively. RESULTS Spinal column injury segments were located between T12 and L4. Pain territories were distributed between the T11 and S5 dermatomes with varying ranges, at an average of 2-6 segments higher than the spinal cord injury segments. Pain relief rate was 100% in 21 patients (50.0%) and was over 50% in 14 patients (33.3%). Eighteen patients (42.9%) developed temporary tingling in the upper edge of the spinal cord lesion segment after surgery. Of the 4 patients with unilateral lower extremity pain, 2 developed postoperative persistent pain in the contralateral lower extremity. CONCLUSIONS For patients with neuropathic pain of the lower extremities and/or the perineal region after thoracolumbar spine fracture, pain within the lower extremities was mostly because of nerve root injury. Pain in the perineal region caused by L1 fracture was attributed to spinal cord injury segmental pain. Nerve root injury pain had a good prognosis after DREZ lesion; the effect of DREZ lesion for spinal cord injury segmental pain may be uncertain.
Collapse
Affiliation(s)
- Ni Bing
- Being Institute of Functional Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China.
| | - Hu Yonsheng
- Being Institute of Functional Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Tao Wei
- Department of Neurosurgery, Shenzhen University General Hospital, Shenzhen University, Shenzhen, China
| | - Shu Wei
- Being Institute of Functional Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Zhu Hongwei
- Being Institute of Functional Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, China
| |
Collapse
|
15
|
Lovaglio A, Socolovsky M, Di Masi G, Bonilla G. Treatment of neuropathic pain after peripheral nerve and brachial plexus traumatic injury. Neurol India 2019; 67:S32-S37. [DOI: 10.4103/0028-3886.250699] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
16
|
Petersen BA, Nanivadekar AC, Chandrasekaran S, Fisher LE. Phantom limb pain: peripheral neuromodulatory and neuroprosthetic approaches to treatment. Muscle Nerve 2018; 59:154-167. [DOI: 10.1002/mus.26294] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/01/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Bailey A. Petersen
- Department of Bioengineering; University of Pittsburgh; 3520 Fifth Avenue, Pittsburgh Pennsylvania 15213 USA
| | - Ameya C. Nanivadekar
- Department of Bioengineering; University of Pittsburgh; 3520 Fifth Avenue, Pittsburgh Pennsylvania 15213 USA
| | - Santosh Chandrasekaran
- Department of Physical Medicine and Rehabilitation; University of Pittsburgh; Pittsburgh Pennsylvania USA
| | - Lee E. Fisher
- Department of Bioengineering; University of Pittsburgh; 3520 Fifth Avenue, Pittsburgh Pennsylvania 15213 USA
- Department of Physical Medicine and Rehabilitation; University of Pittsburgh; Pittsburgh Pennsylvania USA
| |
Collapse
|
17
|
Deer TR, Pope JE, Lamer TJ, Grider JS, Provenzano D, Lubenow TR, FitzGerald JJ, Hunter C, Falowski S, Sayed D, Baranidharan G, Patel NK, Davis T, Green A, Pajuelo A, Epstein LJ, Harned M, Liem L, Christo PJ, Chakravarthy K, Gilmore C, Huygen F, Lee E, Metha P, Nijhuis H, Patterson DG, Petersen E, Pilitsis JG, Rowe JJ, Rupert MP, Skaribas I, Sweet J, Verrills P, Wilson D, Levy RM, Mekhail N. The Neuromodulation Appropriateness Consensus Committee on Best Practices for Dorsal Root Ganglion Stimulation. Neuromodulation 2018; 22:1-35. [PMID: 30246899 DOI: 10.1111/ner.12845] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 05/03/2018] [Accepted: 05/29/2018] [Indexed: 12/21/2022]
Abstract
INTRODUCTION The Neuromodulation Appropriateness Consensus Committee (NACC) is dedicated to improving the safety and efficacy of neuromodulation and thus improving the lives of patients undergoing neuromodulation therapies. With continued innovations in neuromodulation comes the need for evolving reviews of best practices. Dorsal root ganglion (DRG) stimulation has significantly improved the treatment of complex regional pain syndrome (CRPS), among other conditions. Through funding and organizational leadership by the International Neuromodulation Society (INS), the NACC reconvened to develop the best practices consensus document for the selection, implantation and use of DRG stimulation for the treatment of chronic pain syndromes. METHODS The NACC performed a comprehensive literature search of articles about DRG published from 1995 through June, 2017. A total of 2538 article abstracts were then reviewed, and selected articles graded for strength of evidence based on scoring criteria established by the US Preventive Services Task Force. Graded evidence was considered along with clinical experience to create the best practices consensus and recommendations. RESULTS The NACC achieved consensus based on peer-reviewed literature and experience to create consensus points to improve patient selection, guide surgical methods, improve post-operative care, and make recommendations for management of patients treated with DRG stimulation. CONCLUSION The NACC recommendations are intended to improve patient care in the use of this evolving therapy for chronic pain. Clinicians who choose to follow these recommendations may improve outcomes.
Collapse
Affiliation(s)
| | | | - Tim J Lamer
- Division of Pain Medicine, Department of Anesthesiology, Mayo Clinic, Rochester, MN, USA
| | - Jay S Grider
- UKHealthCare Pain Services, Department of Anesthesiology, University of Kentucky College of Medicine, Lexington, KY, USA
| | | | | | - James J FitzGerald
- Nuffield Department of Clinical Neurosciences, University of Oxford, John Radcliffe Hospital, Oxford, UK.,Nuffield Department of Surgical Sciences, University of Oxford, John Radcliffe Hospital, Oxford, UK
| | - Corey Hunter
- Ainsworth Institute of Pain Management, New York, NY, USA
| | - Steven Falowski
- Functional Neurosurgery, St. Lukes University Health Network, Bethlehem, PA, USA
| | - Dawood Sayed
- University of Kansas Medical Center, Kansas City, KS, USA
| | | | - Nikunj K Patel
- Institute of Clinical Neurosciences, Department of Neurosurgery, Southmead Hospital, University of Bristol, Bristol, UK
| | | | - Alex Green
- Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | | | | | - Michael Harned
- Department of Anesthesiology, University of Kentucky, Lexington, KY, USA
| | - Liong Liem
- St. Antonius Hospital, Nieuwegein, The Netherlands
| | | | | | | | - Frank Huygen
- Erasmus University Hospital, Rotterdam, The Netherlands
| | - Eric Lee
- Summit Pain Alliance, Santa Rosa, CA, USA
| | | | | | | | - Erika Petersen
- Department of Neurosurgery, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Julie G Pilitsis
- Neurosurgery and Neuroscience & Experimental Therapeutics, Albany Medical College, Albany, NY, USA
| | | | | | | | - Jennifer Sweet
- Case Western Reserve University, Stereotactic & Functional Neurosurgery, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | | | - Derron Wilson
- Goodman Campbell Brain and Spine, Indiana University School of Medicine Department of Neurological Surgery, Indianapolis, IN, USA
| | | | - Nagy Mekhail
- Evidence-Based Pain Management Research and Education, Cleveland Clinic, Cleveland, OH, USA
| |
Collapse
|
18
|
Russell HG, Tsao JW. Phantom Sensations Following Brachial Plexus Nerve Block: A Case Report. Front Neurol 2018; 9:436. [PMID: 29951033 PMCID: PMC6008534 DOI: 10.3389/fneur.2018.00436] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 05/24/2018] [Indexed: 11/13/2022] Open
Abstract
Following the administration of brachial plexus anesthesia for right thumb carpometacarpal arthroplasty with ligament reconstruction, a 54-year-old woman with all limbs intact developed phantom limb sensations, including the misperception of the placement of her right arm and frozen limb sensations in her fingers. Immobility of her fingers in a stacked position was experienced for ~3.5 days after surgery, and she described her phantom sensations as the hand experiencing "tingling" and feeling "heavy." While the onset of these phantom sensations occurred almost immediately after administration of brachial plexus anesthesia, they lasted for ~69 h after anesthesia wear off, suggesting that cortical effects from denervation resolves much more slowly than initial remapping, giving insight into the mechanisms behind phantom limb sensations that are often experienced by amputees.
Collapse
Affiliation(s)
- Hannah G Russell
- Department of Neurology, University of Tennessee Health Science Center, Memphis, TN, United States
| | - Jack W Tsao
- Department of Neurology, University of Tennessee Health Science Center, Memphis, TN, United States.,Children's Foundation Research Institute, Le Bonheur Children's Hospital, Memphis, TN, United States.,Department of Neurology, Memphis Veterans Affairs Medical Center, Memphis, TN, United States
| |
Collapse
|
19
|
Velásquez C, Tambirajoo K, Franceschini P, Eldridge PR, Farah JO. Upper Cervical Spinal Cord Stimulation as an Alternative Treatment in Trigeminal Neuropathy. World Neurosurg 2018; 114:e641-e646. [PMID: 29548953 DOI: 10.1016/j.wneu.2018.03.044] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 03/04/2018] [Accepted: 03/06/2018] [Indexed: 12/12/2022]
Abstract
OBJECTIVE To describe the indications and outcomes of upper cervical cord stimulation in trigeminal neuropathy. METHODS A consecutive single-center series of patients was retrospectively reviewed. It included 12 patients with trigeminal neuropathy treated with upper cervical spinal cord stimulation. Clinical features, complications, and outcomes were reviewed. RESULTS All patients had a successful trial before the definitive implantation of a spinal cord stimulator at the level of the craniocervical junction. The mean follow-up period was 4.4 years (range, 0.3-21.1 years). The average coverage in the pain zone was 72% and the median baseline, trial, and postoperative numeric rating scale (NRS) was 7, 3, and 3, respectively. When compared with the baseline, the mean reduction achieved in the postoperative average numeric rating scale was 4 points, accounting for a 57.1% pain reduction. The long-term failure rate was 25%. CONCLUSIONS Despite there being enough evidence to consider upper cervical spinal cord stimulation as an effective treatment for patients with neuropathic trigeminal pain, a randomized controlled trial is needed to fully assess its indications and outcomes and compare it with other therapeutic approaches.
Collapse
Affiliation(s)
- Carlos Velásquez
- Department of Neurological Surgery and Spine Unit, Hospital Universitario Marqués de Valdecilla and Instituto de Investigación Marqués de Valdecilla (IDIVAL), Santander, Spain.
| | - Kantharuby Tambirajoo
- Department of Neurosurgery, The Walton Centre NHS Foundation Trust, Liverpool, United Kingdom
| | - Paulo Franceschini
- Department of Neurosurgery, The Walton Centre NHS Foundation Trust, Liverpool, United Kingdom
| | - Paul R Eldridge
- Department of Neurosurgery, The Walton Centre NHS Foundation Trust, Liverpool, United Kingdom
| | - Jibril Osman Farah
- Department of Neurosurgery, The Walton Centre NHS Foundation Trust, Liverpool, United Kingdom
| |
Collapse
|
20
|
Efficacy and factors determining the outcome of dorsal root entry zone lesioning procedure (DREZotomy) in the treatment of intractable pain syndrome. Acta Neurochir (Wien) 2017; 159:2431-2442. [PMID: 28993994 DOI: 10.1007/s00701-017-3345-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 09/29/2017] [Indexed: 10/18/2022]
Abstract
BACKGROUND Chronic pain is a disabling condition that adversely affects patient quality of life. The dorsal root entry zone lesioning procedure (DREZotomy) is a modality used to treat intractable pain caused by insults to neural structures. This study aimed to investigate the efficacy of and the factors that determine the outcome of microsurgical DREZotomy (MDT). METHOD All consecutive patients who underwent MDT for treatment of intractable pain during September 2008 to December 2016 were enrolled. Demographic data, clinical characteristics, intraoperative findings, and postoperative outcomes were analyzed. RESULTS The 40 included patients underwent MDT for relief of intractable pain caused by 27 brachial plexus injuries (BPIs), 6 spinal cord injuries, 3 neoplasms, and 4 other causes. A significant reduction in pain was observed post-MDT for both average (p < 0.001) and maximal pain (p < 0.001). Favorable outcome (≥50% pain reduction) was observed in 67.5% of patients, with the best outcome in BPI-related pain. In multivariate analysis, injury of the spinal nerve root (root avulsion or injury) was significantly associated with good average pain relief (OR, 5.8; 95% CI, 1.2-27.5; p = 0.026) and pain freedom (OR, 5.0; 95% CI, 1.12-22.30; p = 0.035). Electrical pain (OR, 6.49; 95% CI, 1.20-35.19; p = 0.030) and lower number of painful dermatomes (OR, 1.30; 95% CI, 1.01-1.67; p = 0.039) were significantly associated with good maximal pain relief. CONCLUSIONS MDT is an effective procedure for treatment of intractable pain in well-selected patients, particularly in cases with brachial plexus avulsion pain. Injury of the spinal nerve root (brachial plexus avulsion and cauda equina injury) was associated with good average pain relief and pain freedom, and electrical pain and lower number of painful dermatomes were associated with good maximal pain relief. The results are useful in the selection of candidates for DREZotomy and prediction of surgical outcome.
Collapse
|
21
|
Son BC, Choi JG, Ha SW, Kim DR. Intraoperative Neurophysiological Monitoring (Motor and Somatosensory Evoked Potentials) in Dorsal Root Entry Zone Lesioning for Brachial Plexus Avulsion Pain. Stereotact Funct Neurosurg 2017; 95:330-340. [PMID: 28982108 DOI: 10.1159/000479889] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 07/24/2017] [Indexed: 11/19/2022]
Abstract
AIMS To address the feasibility and importance of intraoperative neurophysiological monitoring (IONM) in dorsal root entry zone (DREZ) lesioning for brachial plexus avulsion pain. METHODS Muscle motor evoked potential (mMEP) and somatosensory evoked potential (SSEP) were applied during DREZ lesioning for brachial plexus avulsion pain. RESULTS IONM of mMEPs and SSEPs was feasible for monitoring of the spinal cord during DREZ lesioning. With the exception of 3 unrecordable mMEPs in ipsilateral arms, mMEPs were preserved and referenced to look for changes according to lesioning in 6 upper extremities (66.6%) and 8 lower extremities. All 3 patients with >50% reduction in baseline mMEP amplitude after lesioning in either the ipsilateral upper or lower extremities showed postoperative ataxia and weakness of the lower extremities (100%). Only 2 out of 9 patients (22.2%) with brachial plexus avulsion pain had discernible baseline SSEPs in the ipsilateral upper extremities. One of 2 patients with discernible SSEPs in the upper extremities showed significant SSEP events during the DREZ lesioning and experienced postoperative ataxia and weakness in the legs despite the absence of a SSEP event in the lower extremities. CONCLUSION Significant events on IONM were common during DREZ lesioning for brachial plexus avulsion pain and were closely related to the occurrence of postoperative neurological deficits.
Collapse
Affiliation(s)
- Byung-Chul Son
- Department of Neurosurgery, Seoul St. Mary's Hospital, Catholic University of Korea, Seoul, Republic of Korea
| | | | | | | |
Collapse
|
22
|
Widerström-Noga E. Neuropathic Pain and Spinal Cord Injury: Phenotypes and Pharmacological Management. Drugs 2017; 77:967-984. [PMID: 28451808 DOI: 10.1007/s40265-017-0747-8] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Chronic neuropathic pain is a complicated condition after a spinal cord injury (SCI) that often has a lifelong and significant negative impact on life after the injury; therefore, improved pain management is considered a significant and unmet need. Neuropathic pain mechanisms are heterogeneous and the difficulty in determining their individual contribution to specific pain types may contribute to poor treatment outcomes in this population. Thus, identifying human neuropathic pain phenotypes based on pain symptoms, somatosensory changes, or cognitive and psychosocial factors that reflect specific spinal cord or brain mechanisms of neuropathic pain is an important goal. Once a pain phenotype can be reliably replicated, its relationship with biomarkers and clinical treatment outcomes can be analyzed, and thereby facilitate translational research and further the mechanistic understanding of individual differences in the pain experience and in clinical trial outcomes. The present article will discuss clinical aspects of SCI-related neuropathic pain, neuropathic pain phenotypes, pain mechanisms, potential biomarkers and pharmacological interventions, and progress regarding how defining neuropathic pain phenotypes may lead to more targeted treatments for these difficult pain conditions.
Collapse
Affiliation(s)
- Eva Widerström-Noga
- The Miami Project to Cure Paralysis, University of Miami, 1095 NW 14th Terrace, Miami, FL, 33136, USA. .,Department of Neurological Surgery, University of Miami, 1095 NW 14th Terrace, Miami, FL, 33136, USA.
| |
Collapse
|
23
|
Abstract
Atypical neuropathic facial pain is a syndrome of intractable and unremitting facial pain that is secondary to nociceptive signaling in the trigeminal system. These syndromes are often recalcitrant to pharmacotherapy and other common interventions, including microvascular decompression and percutaneous procedures. Herein, the authors present two other viable approaches (nucleus caudalis dorsal root entry zone lesioning and motor cortex stimulation), their indications, and finally a possible treatment algorithm to consider when assessing patients with atypical facial pain.
Collapse
Affiliation(s)
- Shervin Rahimpour
- Department of Neurosurgery, Duke University Medical Center, DUMC 3807, Durham, NC 27710, USA
| | - Shivanand P Lad
- Department of Neurosurgery, Duke University Medical Center, DUMC 3807, Durham, NC 27710, USA.
| |
Collapse
|
24
|
The CanPain SCI Clinical Practice Guidelines for Rehabilitation Management of Neuropathic Pain after Spinal Cord: Recommendations for treatment. Spinal Cord 2016; 54 Suppl 1:S14-23. [DOI: 10.1038/sc.2016.90] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|