A Pilot Investigation into Targeted Muscle Reinnervation for Complex Regional Pain Syndrome, Type II.

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Citation: Plastic and Reconstructive Surgery - Global Open. 10(12):e4718, 2022 Dec.PMID: 36569237Department: MedStar Georgetown University Hospital/MedStar Washington Hospital Center | Plastic Surgery ResidencyForm of publication: Journal ArticleMedline article type(s): Journal ArticleYear: 2022ISSN:
  • 2169-7574
Name of journal: Plastic and reconstructive surgery. Global openAbstract: Complex regional pain syndrome (CRPS) is a debilitating condition, characterized by severe pain with vascular, motor, or trophic changes. Varied presentations make this a diagnostic and therapeutic challenge. There is a lack of high-quality evidence demonstrating efficacy for most existing therapies, particularly with surgical intervention for type II CRPS (CRPS-II). Targeted muscle reinnervation (TMR) is a surgical technique to transfer the terminal end of a divided nerve to a recipient motor nerve, shown to limit phantom limb pain, residual limb pain, and postamputation neuroma pain.Conclusions: These outcomes suggest that TMR may provide some benefit to reducing pain severity patients with CRPS, even after a more chronic disease course. Further prospective trials are warranted. Copyright © 2022 The Authors. Published by Wolters Kluwer Health, Inc. on behalf of The American Society of Plastic Surgeons.Methods: Herein, we describe a series of 13 patients undergoing TMR for CRPS-II by a single surgeon from 2018 to 2021 in the upper (38%) and lower extremities (62%). All patients had a diagnosis of CRPS-II with either traumatic or postsurgical etiology, each seeking TMR with or without concomitant treatment to control their pain after previous therapies had failed. Three patients had previous lower extremity amputation, whereas three others received lower extremity amputation at the time of TMR, each indicated for control of CRPS pain.Results: Of the patients receiving TMR within 1 year of CRPS diagnosis, all three reported improved function, and two patients were able to tolerate a prosthetic for ambulation after previous pain prevented prosthetic use. Of the entire cohort, all but one patient reported reduced pain interference or improved function.All authors: Shin SEFiscal year: FY2023Digital Object Identifier:
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Journal Article MedStar Authors Catalog Article 36569237 Available 36569237

Complex regional pain syndrome (CRPS) is a debilitating condition, characterized by severe pain with vascular, motor, or trophic changes. Varied presentations make this a diagnostic and therapeutic challenge. There is a lack of high-quality evidence demonstrating efficacy for most existing therapies, particularly with surgical intervention for type II CRPS (CRPS-II). Targeted muscle reinnervation (TMR) is a surgical technique to transfer the terminal end of a divided nerve to a recipient motor nerve, shown to limit phantom limb pain, residual limb pain, and postamputation neuroma pain.

Conclusions: These outcomes suggest that TMR may provide some benefit to reducing pain severity patients with CRPS, even after a more chronic disease course. Further prospective trials are warranted. Copyright © 2022 The Authors. Published by Wolters Kluwer Health, Inc. on behalf of The American Society of Plastic Surgeons.

Methods: Herein, we describe a series of 13 patients undergoing TMR for CRPS-II by a single surgeon from 2018 to 2021 in the upper (38%) and lower extremities (62%). All patients had a diagnosis of CRPS-II with either traumatic or postsurgical etiology, each seeking TMR with or without concomitant treatment to control their pain after previous therapies had failed. Three patients had previous lower extremity amputation, whereas three others received lower extremity amputation at the time of TMR, each indicated for control of CRPS pain.

Results: Of the patients receiving TMR within 1 year of CRPS diagnosis, all three reported improved function, and two patients were able to tolerate a prosthetic for ambulation after previous pain prevented prosthetic use. Of the entire cohort, all but one patient reported reduced pain interference or improved function.

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