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Rahimian S, Najafi H, Webber CA, Jalali H. Advances in Exosome-Based Therapies for the Repair of Peripheral Nerve Injuries. Neurochem Res 2024; 49:1905-1925. [PMID: 38807021 DOI: 10.1007/s11064-024-04157-1] [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: 11/16/2023] [Revised: 03/07/2024] [Accepted: 05/17/2024] [Indexed: 05/30/2024]
Abstract
Peripheral nerve injuries (PNIs) are the term used to describe injuries that occur to the nerve fibers of the peripheral nervous system (PNS). Such injuries may be caused by trauma, infection, or aberrant immunological response. Although the peripheral nervous system has a limited capacity for self-repair, in cases of severe damage, this process is either interrupted entirely or is only partially completed. The evaluation of variables that promote the repair of peripheral nerves has consistently been a focal point. Exosomes are a subtype of extracellular vesicles that originate from cellular sources and possess abundant proteins, lipids, and nucleic acids, play a critical role in facilitating intercellular communication. Due to their modifiable composition, they possess exceptional capabilities as carriers for therapeutic compounds, including but not limited to mRNAs or microRNAs. Exosome-based therapies have gained significant attention in the treatment of several nervous system diseases due to their advantageous properties, such as low toxicity, high stability, and limited immune system activation. The objective of this review article is to provide an overview of exosome-based treatments that have been developed in recent years for a range of PNIs, including nerve trauma, diabetic neuropathy, amyotrophic lateral sclerosis (ALS), glaucoma, and Guillain-Barre syndrome (GBS). It was concluded that exosomes could provide favorable results in the improvement of peripheral PNIs by facilitating the transfer of regenerative factors. The development of bioengineered exosome therapy for PNIs should be given more attention to enhance the efficacy of exosome treatment for PNIs.
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Affiliation(s)
- Sana Rahimian
- Division of Nanobiotehnology, Department of Cell and Molecular Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran
| | - Hossein Najafi
- Division of Nanobiotehnology, Department of Cell and Molecular Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran
| | - Christine A Webber
- Division of Anatomy, Department of Surgery, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada
| | - Hanieh Jalali
- Division of Cell and Developmental Biology, Department of Animal Biology, Faculty of Biological Sciences, Kharazmi University, No. 43, South Moffateh Ave, Tehran, 15719-14911, Iran.
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McEachan JE, Dahlin LB, Ng CY, Ring D, Ruettermann M. Round table discussion: the management of idiopathic cubital tunnel syndrome. J Hand Surg Eur Vol 2024; 49:926-932. [PMID: 38534139 DOI: 10.1177/17531934241238942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
Idiopathic cubital tunnel syndrome is the second most common neuropathy in the upper limb. Best evidence regarding the surgical management of this condition has evolved from anterior or submuscular transposition as the former reference standard, to in situ simple release. Differences of opinion remain regarding the timing of surgery, type of surgery and adjunctive surgery. Four surgeons with Level 5 expertise were asked to answer specific questions regarding this condition.
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Affiliation(s)
- Jane E McEachan
- Fife Hand Clinic, Department of Orthopaedic Surgery, NHS Fife, UK
| | - Lars B Dahlin
- Department of Translational Medicine-Hand Surgery, Lund University, Malmö, Sweden
- Department of Hand Surgery, Skåne University Hospital, Malmö, Sweden
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Chye Yew Ng
- Upper Limb Unit, Wrightington Hospital, Wigan, UK
| | - David Ring
- University of Texas at Austin Dell Medical School, Austin, TX, USA
| | - Mike Ruettermann
- Department of Plastic Surgery, University of Groningen, Groningen, The Netherlands
- Institute for Hand and Plastic Surgery, Oldenburg, Germany
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Bertelli JA, Rosa ICN, Ghizoni MF. Retrograde peripheral nerve regeneration from sensory to motor pathways in rats: a new experimental concept in nerve repair. Neurol Res 2024; 46:125-131. [PMID: 37729085 DOI: 10.1080/01616412.2023.2258039] [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: 02/06/2023] [Accepted: 09/03/2023] [Indexed: 09/22/2023]
Abstract
BACKGROUND The polarity of nerve grafts does not interfere with axon growth. Our goal was to investigate whether axons can regenerate in a retrograde fashion within sensory pathways and then extend into motor pathways, leading to muscle reinnervation. METHODS Fifty-four rats were randomized into four groups. In Group 1, the ulnar nerve was connected end-to-end to the superficial radial nerve after neurectomy of the radial nerve in the axilla. In Group 2, the ulnar nerve was connected end-to-end to the radial nerve distal to the humerus; the radial nerve then was divided in the axilla. In Group 3, the radial nerve was divided in the axilla, but no nerve reconstruction was performed. In Group 4, the radial nerve was crushed in the axilla. Over 6 months, we behaviorally assessed the recovery of toe spread in the right operated-upon forepaw by lifting the rat by its tail and lowering it onto a flat surface. Six months after surgery, rats underwent reoperation, nerve transfers were tested electrophysiologically, and the posterior interosseous nerve (PIN) was removed for histological evaluation. RESULTS Rats in the crush group recovered toe spread between 5 and 8 days after surgery. Rats with nerve transfers demonstrated electrophysiological and histological findings of nerve regeneration but no behavioral recovery. CONCLUSIONS Ulnar nerve axons regrew into the superficial radial nerve and then into the PIN to reinnervate the extensor digitorum communis. We were unable to demonstrate behavioral recovery because rats cannot readapt to cross-nerve transfer.
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Affiliation(s)
- Jayme A Bertelli
- Department of Surgery in lieu of Department of Surgical Techniques, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil
| | - Isadora Carvalho Nunes Rosa
- Center of Biological and Health Sciences, University of the South of Santa Catarina (UNISUL), Tubarão, Santa Catarina, Brazil
| | - Marcos F Ghizoni
- Department of Neurosurgery, Center of Biological and Health Sciences, University of the South of Santa Catarina (UNISUL), Tubarão, Santa Catarina, Brazil
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Gupta R, Johnston TR, Chen VY, Gonzales LP, Steward O. Human Motor Endplate Survival after Chronic Peripheral Nerve Injury. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.10.12.23296760. [PMID: 37873401 PMCID: PMC10592993 DOI: 10.1101/2023.10.12.23296760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Objective Degeneration of motor endplates (MEPs) in denervated muscle is thought to be a key factor limiting functional regeneration after peripheral nerve injury (PNI) in humans. However, there is currently no paradigm to determine MEP status in denervated human muscle to estimate likelihood of reinnervation success. Here, we present a quantitative analysis of MEP status in biopsies of denervated muscles taken during nerve repair surgery and ensuing functional recovery. Methods This is a retrospective single-surgeon cohort study of patients (n=22) with upper extremity PNI confirmed with electromyography (EMG), treated with nerve transfers. Muscle biopsies were obtained intra-operatively from 10 patients for MEP morphometric analysis. Age at time of surgery ranged from 22-77 years and time from injury to surgery ranged from 2.5-163 months. Shoulder range of motion (ROM) and Medical Research Council (MRC) scores were recorded pre-op and at final follow-up. Results Surviving MEPs were observed in biopsies of denervated muscles from all patients, even those greater than six months from injury. Average postoperative ROM improvement (assessed between 6-9 months post-surgery) was: forward flexion 84.3 ± 51.8°, abduction 62.5 ± 47.9°, and external rotation 25.3 ± 28.0°. Interpretation While it is believed that MEP degeneration 6 months post-injury prevents reinnervation, this data details MEP persistence beyond this timepoint along with significant functional recovery after nerve surgery. Accordingly, persistence of MEPs in denervated muscles may predict the extent of functional recovery from nerve repair surgery.
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Affiliation(s)
- Ranjan Gupta
- University of California, Irvine, Department of Orthopaedics
| | | | - Vivian Y. Chen
- University of California, Irvine, Department of Orthopaedics
| | | | - Oswald Steward
- University of California, Irvine, Reeve-Irvine Research Center
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Nickel KJ, Morzycki A, Hsiao R, Morhart MJ, Olson JL. Nerve Transfer Is Superior to Nerve Grafting for Suprascapular Nerve Reconstruction in Obstetrical Brachial Plexus Birth Injury: A Meta-Analysis. Hand (N Y) 2023; 18:385-392. [PMID: 34448408 PMCID: PMC10152526 DOI: 10.1177/15589447211030691] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Restoration of shoulder function in obstetrical brachial plexus injury is paramount. There remains debate as to the optimal method of upper trunk reconstruction. The purpose of this study was to test the hypothesis that spinal accessory nerve to suprascapular nerve transfer leads to improved shoulder external rotation relative to sural nerve grafting. METHODS A systematic review of Medline, EMBASE, EBSCO CINAHL, SCOPUS, Cochrane Library, and TRIP Pro from inception was conducted. Our primary outcome was shoulder external rotation. RESULTS Four studies were included. Nerve transfer was associated with greater shoulder external rotation relative to nerve grafting (mean difference: 0.82 AMS 95% confidence interval [CI]: 0.27-1.36, P < .005). Patients undergoing nerve grafting were more likely to undergo a secondary shoulder stabilizing procedure (odds ratio [OR]: 1.27, 95% CI: 0.8376-1.9268). CONCLUSION In obstetrical brachial plexus injury, nerve transfer is associated with improved shoulder external rotation and a lower rate of secondary shoulder surgery. LEVEL OF EVIDENCE Level III; Therapeutic.
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Management of the Mangled Extremity. CURRENT SURGERY REPORTS 2023. [DOI: 10.1007/s40137-023-00349-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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Maldonado AA, Dittman LE, Loosbrock MF, Bishop AT, Spinner RJ, Shin AY. Factors Associated with Poorer Outcomes from Triceps Motor Branch to Anterior Axillary Nerve Transfer: A Case-Control Study. World Neurosurg 2022; 167:e1115-e1121. [PMID: 36122860 DOI: 10.1016/j.wneu.2022.08.141] [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: 06/30/2022] [Revised: 08/29/2022] [Accepted: 08/30/2022] [Indexed: 10/31/2022]
Abstract
INTRODUCTION We sought to identify predictors of failed triceps motor branch transfer to the anterior division of the axillary nerve (AN) for shoulder abduction reconstruction after a brachial plexus injury (BPI). METHODS A case-control study of adult AN or brachial plexus patients treated with a triceps motor branch transfer to the anterior division of the AN with a minimum 18 months of follow-up was performed. The failure group (case group) was defined as modified British Medical Research Council muscle scale (mBMRC) postoperative deltoid grade ≤2 and was compared to the successful outcome group (control group), defined as mBMRC postoperative deltoid grade ≥3. Clinical variables, injury mechanism, time from injury to surgery, root avulsion status, electrodiagnostic studies, rotator cuff injuries, scapula fracture, Disabilities of the Arm Shoulder and Hand scores, and preoperative triceps strength were analyzed. Subgroup analysis was performed for patients with isolated AN injuries and those with BPI. RESULTS A total of 69 patients met inclusion/exclusion criteria, of whom 23 regained ≥M3 deltoid muscle strength and 52° ± 69° of shoulder abduction (successful outcome group) and 46 regained ≤M2 deltoid muscle strength and 27° ± 30° of shoulder abduction (failure group). Preoperative triceps weakness (M ≤4) was significantly more common in the failure group (63% vs. 30%, P = 0.032); preoperative triceps muscle fibrillations were significantly more common in the failure group (61% vs. 30%, P = 0.02). Isolated AN injuries presented better preoperative motion and postoperative outcomes results compared to BPI. CONCLUSIONS Use of triceps motor branch associated with fibrillations or weakness resulted in statistically poorer outcomes compared to the use of a normal triceps motor branch in the restoration of anterior AN function after nerve transfer.
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Affiliation(s)
- Andres A Maldonado
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA; Department of Plastic Surgery, University Hospital of Getafe, Madrid, Spain
| | - Lauren E Dittman
- Division of Hand Surgery, Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Michelle F Loosbrock
- Division of Hand Surgery, Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Allen T Bishop
- Division of Hand Surgery, Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Robert J Spinner
- Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Alexander Y Shin
- Division of Hand Surgery, Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA.
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Maeng WY, Tseng WL, Li S, Koo J, Hsueh YY. Electroceuticals for peripheral nerve regeneration. Biofabrication 2022; 14. [PMID: 35995036 PMCID: PMC10109522 DOI: 10.1088/1758-5090/ac8baa] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 08/22/2022] [Indexed: 11/12/2022]
Abstract
Electroceuticals provide promising opportunities for peripheral nerve regeneration, in terms of modulating the extensive endogenous tissue repair mechanisms between neural cell body, axons and target muscles. However, great challenges remain to deliver effective and controllable electroceuticals via bioelectronic implantable device. In this review, the modern fabrication methods of bioelectronic conduit for bridging critical nerve gaps after nerve injury are summarized, with regard to conductive materials and core manufacturing process. In addition, to deliver versatile electrical stimulation, the integration of implantable bioelectronic device is discussed, including wireless energy harvesters, actuators and sensors. Moreover, a comprehensive insight of beneficial mechanisms is presented, including up-to-date in vitro, in vivo and clinical evidence. By integrating conductive biomaterials, 3D engineering manufacturing process and bioelectronic platform to deliver versatile electroceuticals, the modern biofabrication enables comprehensive biomimetic therapies for neural tissue engineering and regeneration in the new era.
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Affiliation(s)
- Woo-Youl Maeng
- Bio-Medical Engineering, Korea University, B156, B, Hana Science Hall, 145, Anam-ro, Seongbuk-gu, Seoul, Seongbuk-gu, Seoul, 02841, Korea (the Republic of)
| | - Wan Ling Tseng
- Department of Surgery, National Cheng Kung University College of Medicine, No.138, Sheng-Li road, Tainan, 701, TAIWAN
| | - Song Li
- Department of Bioengineering, University of California Los Angeles, 5121 Eng V, Los Angeles, California, 90095, UNITED STATES
| | - Jahyun Koo
- Biomedical Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, 02841, Korea (the Republic of)
| | - Yuan-Yu Hsueh
- Department of Surgery, National Cheng Kung University College of Medicine, No.138, Sheng-Li road, Tainan, 701, TAIWAN
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Chang J, Bhandari L, Messana J, Alkabbaa S, Hamidian Jahromi A, Konofaos P. Management of Tourniquet-Related Nerve Injury (TRNI): A Systematic Review. Cureus 2022; 14:e27685. [PMID: 36072167 PMCID: PMC9440764 DOI: 10.7759/cureus.27685] [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] [Accepted: 08/04/2022] [Indexed: 11/18/2022] Open
Abstract
Tourniquet-related nerve injuries (TRNIs) are a rare but feared complication of operative tourniquet use. While the literature contains multiple discussions regarding tourniquet use as well as reported cases of its complications, there does not exist a consensus guideline for a safe tourniquet pressure, application time, or management of TRNI. This paper conducts a comprehensive review of the available literature for cases of TRNI with a specific focus on analyzing the management of cases of TRNI and their functional recovery. One hundred nine articles were retrieved in a search of medical literature (PubMed) using the keywords: tourniquet, nerve injury, paralysis, and palsy. The initial search was further narrowed down to seven case series and 10 case reports totaling 203 reported cases of TRNI. Of the 203 cases, 64 cases involved upper extremity tourniquet use, and 139 cases involved lower extremity tourniquet use. Most patients (89.75%) experienced a complete recovery. TRNI may occur over a wide range of tourniquet application times and tourniquet pressures; hence, it is a necessity for surgeons to consider it as a potential complication and understand the methodology for diagnosis and long-term management.
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Neuroplasticity following Nerve Transfer of the Anterior Interosseous Nerve for Proximal Ulnar Nerve Injuries. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2021; 9:e3684. [PMID: 34277319 PMCID: PMC8277281 DOI: 10.1097/gox.0000000000003684] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 05/05/2021] [Indexed: 12/14/2022]
Abstract
Background: Injuries to the ulnar nerve at or above proximal forearm level result in poor recovery despite early microsurgical repair, especially concerning the intrinsic motor function of the hand. To augment the numbers of regenerating axons into the targeted muscles, a nerve transfer of the distal branch of the median nerve, the anterior interosseous nerve, to the ulnar motor branch has been described. Methods: Two patients with severe atrophy of the intrinsic hand muscles following an initial proximal ulnar nerve repair had surgery with an end-to-side transfer of the anterior interosseous nerve to the ulnar motor branch at the wrist level. Outcome and neuroplasticity were prospectively studied using questionnaires, clinical examinations, electroneurography, electromyography, somatosensory evoked potentials at pre nerve transfer and 3-, 12-, and 24-months post nerve transfer as well as navigated transcranial magnetic stimulation at pre nerve transfer and 3- and 12-months post nerve transfer. Results: Successively improved motor function was observed. Complete reinnervation of intrinsic hand muscles was demonstrated at 12- to 24-months follow-up by electroneurography and electromyography. At the cortical level, navigated transcranial magnetic stimulation detected a movement of the hot-spot for the abductor digiti mini muscle, originally innervated by the ulnar nerve and the size of the area from where responses could be elicited in this muscle changed over time, indicating central plastic processes. An almost complete reinnervation of the pronator quadratus muscle was also observed. Conclusion: Both central and peripheral plastic mechanisms are involved in muscle reinnervation after anterior interosseous nerve transfer for treatment of proximal ulnar nerve injuries.
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Rivera F, Bianciotto A. Contraceptive subcutaneous device migration: what does an orthopaedic surgeon need to know? A case report and literature review. ACTA BIO-MEDICA : ATENEI PARMENSIS 2020; 91:232-237. [PMID: 32555102 PMCID: PMC7944845 DOI: 10.23750/abm.v91i4-s.9498] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 05/10/2020] [Indexed: 11/23/2022]
Abstract
Subdermal contraceptive implant is approved in more than 60 countries and used by millions of women around the world. Although relatively safe in nature, their implantation and removal may be associated with potential complications, some of which may require surgical intervention. Two types of peripheral neurological complications are reported: complications related to compressive neuropathy caused by device decubitus and complications related to device improper removal. An healthy 35-year-old woman come to our attention for paresthesia from medial side of right elbow to fourth and fifth fingers. Tinel sign was positive on medial side of distal third of right arm, above the elbow, as well. Clinical history of patients revealed a subcutaneous placement of a etonogestrel implant 3 years before. Patients reported disappearing of tactile feeling of subcutaneous contraceptive implant since two months. At clinical examination, implant was not felt in its original subcutaneous place. X-rays control revealed its proximal and deep migration. Surgical exploration for subcutaneous contraceptive implant removal revealed it lying on the ulnar nerve. Patient referred immediate paresthesia disappearing after surgery. At 1 month follow up no motor or sensory alteration were evident. Removal of implants inserted too deeply must be carefully performed to prevent damages to nervous and vascular structures and it should be performed by operators who are very familiar with the anatomy of the arm. In case of chronic neuropathy caused by implant nerve compression only an appropriate patients information about rare but possible neuropathic symptoms related to device migration and a careful medical history collecting can avoid a mistaken diagnosis of canalicular syndrome.
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Affiliation(s)
- Fabrizio Rivera
- Orthopedics and Trauma Department, SS Annunziata Hospital, Savigliano (CN), Italy.
| | - Andrea Bianciotto
- Department of Obstetrics and Gynaecology, SS Annunziata Hospital, Savigliano, CN, Italy.
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Melicosta ME, Dean J, Hagen K, Oppenheimer K, Porter C, Rybczynski S, Salorio C, Sadowsky C. Acute flaccid myelitis: Rehabilitation challenges and outcomes in a pediatric cohort. J Pediatr Rehabil Med 2019; 12:245-253. [PMID: 31476175 DOI: 10.3233/prm-180549] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
PURPOSE To describe one institution's experience in the rehabilitation of children with acute flaccid myelitis (AFM). This study reviews the medical and rehabilitative course and functional outcomes of a cohort of children who underwent Activity Based Restorative Therapy (ABRT) at a single center. METHODS Children with AFM presenting for rehabilitation between March 2005 and January 2017 were identified and a retrospective chart review was conducted. Changes in medical and functional status were assessed using multiple standardized instruments, as well as a chart review of medical progress. RESULTS Thirty-one children with AFM treated at our institution in the study time period were identified. Of these, seventeen received inpatient treatment, and fourteen received solely outpatient interventions. Their medical and functional outcomes are described with use of standardized measures when available. CONCLUSIONS Children with flaccid paralysis due to AFM undergoing structured, comprehensive rehabilitation interventions, even when these are initiated long after paralysis onset, can make significant neurologic and functional gains. Recovery of function and prevention of comorbidities are the main therapeutic targets for interventions in this population.
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Affiliation(s)
- Michelle E Melicosta
- Department of Pediatric Rehabilitation, Kennedy Krieger Institute, Baltimore, MD, USA.,Department of Pediatrics, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Janet Dean
- International Center for Spinal Cord Injury, Kennedy Krieger Institute, Baltimore, MD, USA
| | - Kaitlin Hagen
- Speech and Language Department, Kennedy Krieger Institute, Baltimore, MD, USA
| | | | - Courtney Porter
- International Center for Spinal Cord Injury, Kennedy Krieger Institute, Baltimore, MD, USA
| | - Suzanne Rybczynski
- Department of Pediatric Rehabilitation, Kennedy Krieger Institute, Baltimore, MD, USA.,Department of Pediatrics, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - Cynthia Salorio
- Department of Pediatric Rehabilitation, Kennedy Krieger Institute, Baltimore, MD, USA
| | - Cristina Sadowsky
- International Center for Spinal Cord Injury, Kennedy Krieger Institute, Baltimore, MD, USA
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The Multidisciplinary Approach to the Diagnosis and Management of Nonobstetric Traumatic Brachial Plexus Injuries. AJR Am J Roentgenol 2018; 211:1319-1331. [DOI: 10.2214/ajr.18.19887] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Rinkinen JR, Giladi AM, Iorio ML. Outcomes Following Peripheral Nerve Transfers for Treatment of Non-Obstetric Brachial Plexus Upper-Extremity Neuropathy. JBJS Rev 2018; 6:e1. [PMID: 29613866 DOI: 10.2106/jbjs.rvw.17.00124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Jacob R Rinkinen
- Division of Plastic and Reconstructive Surgery (J.R.R. and M.L.I.) and Department of Orthopaedics (A.M.G. and M.L.I.), Beth Israel Deaconess Medical Center, Boston, Massachusetts
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Comparison of Surgical Strategies between Proximal Nerve Graft and/or Nerve Transfer and Distal Nerve Transfer Based on Functional Restoration of Elbow Flexion. Plast Reconstr Surg 2018; 141:68e-79e. [DOI: 10.1097/prs.0000000000003935] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Pediatric Spinal Cord Injury Due to Acute Flaccid Myelitis: Epidemiology, Clinical Management, and Implications for Rehabilitation. CURRENT PHYSICAL MEDICINE AND REHABILITATION REPORTS 2017. [DOI: 10.1007/s40141-017-0159-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Bhatia A, Doshi P, Koul A, Shah V, Brown JM, Salama M. Contralateral C-7 transfer: is direct repair really superior to grafting? Neurosurg Focus 2017; 43:E3. [DOI: 10.3171/2017.4.focus1794] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
It is not uncommon for a severe traumatic brachial plexus injury to involve all 5 roots, resulting in a flail upper limb. In such cases, surgical reconstruction is often palliative, providing only rudimentary function. Nerve transfers are the mainstay of reconstructive strategies due to the predominance of root avulsions. Consistent results are obtained only for restoration of shoulder stability and elbow flexion, whereas restoring useful hand function remains a challenge. The transfer of the contralateral C-7 (cC-7) is commonly used in an attempt to restore basic hand function, but results are notoriously unreliable and inconsistent. Shu-feng Wang and colleagues recently proposed a potentially more successful permutation of this procedure. They advocated direct approximation of the cC-7 to the lower trunk on the paralyzed side, thus avoiding the interposition of nerve grafts. This technique involves a lengthy dissection of the cC-7 transfer across the midline via a prespinal route, as well as extensive mobilization of the ipsilateral lower trunk by cutting a subset of its branches, adducting the arm, and (if necessary) shortening the humerus. Each of these steps is indispensable to achieve direct approximation of the nerve ends. Many surgeons have tried to emulate Wang’s strategy. However, the technical difficulties involved have forced recourse to interposition of nerve grafts once again.The authors report their observations in the first 22 patients in whom they performed this procedure. Direct cC-7 repair via the prespinal route was performed in 12 patients. Shortening of the humerus was necessary in 9 of these 12 patients. In 10 patients, a direct repair was not feasible and nerve grafting was performed. The median follow-up period was 26 months for the direct coaptation group and 28.5 months for the nerve graft group.In the direct repair group, 10 of the 12 patients regained Medical Research Council Grade 3 flexion of the wrist and of the middle, ring, and little fingers, while the remaining 2 patients had Grade 2 function. Flexion appeared 12–14 months after the operation. At the latest follow-up, these patients could activate the wrist and hand without requiring significant augmentation maneuvers in the donor limb. In contrast, repair requiring interposition grafts resulted in Grade 3 strength in only 2 of 10 patients, while 7 had Grade 2 strength, and 1 experienced failure. In all grafted cases, the patient had to forcibly contract the contralateral pectoralis major and triceps muscles to produce the weak movements on the reconstructed side.In this small series, the authors demonstrated a distinct advantage associated with the avoidance of grafts when transferring the cC-7 to restore hand function. The authors conclude that efforts to achieve direct approximation of the donor C-7 and the recipient lower trunk are necessary and justified.
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Affiliation(s)
- Anil Bhatia
- 1Department of Brachial Plexus Surgery, Deenanath Mangeshkar Hospital, Pune
| | - Piyush Doshi
- 2Department of Plastic Surgery, SBKS Medical Institute and Research Centre, Vadodara
| | - Ashok Koul
- 3Department of Plastic Surgery, Sparsh Hospital, Bengaluru
| | - Vitrag Shah
- 4Department of Plastic Surgery, Shah Hospital, Surat, India
| | - Justin M. Brown
- 5Department of Neurosurgery, UC San Diego Health, San Diego, California; and
| | - Mahmoud Salama
- 6Department of Orthopaedics, Aswan University, Aswan, Egypt
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Forli A, Bouyer M, Aribert M, Curvale C, Delord M, Corcella D, Moutet F. Upper limb nerve transfers: A review. HAND SURGERY & REHABILITATION 2017; 36:151-172. [DOI: 10.1016/j.hansur.2016.11.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 09/19/2016] [Accepted: 11/09/2016] [Indexed: 11/27/2022]
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Elfar JC. Priming the stump in peripheral nerve injury (Commentary on Zhang et al. (2017)). Eur J Neurosci 2017; 45:748-749. [DOI: 10.1111/ejn.13523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- John C. Elfar
- The Del Monte Institute for Neuroscience and the Department of Orthopaedics; University of Rochester School of Medicine and Dentistry; Rochester NY 14642 USA
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