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Majerus S, Nguyen C, Brose S, Nemunaitis G, Damaser M, Bourbeau DJ. Automated closed-loop stimulation to inhibit neurogenic bladder overactivity. Proc Inst Mech Eng H 2024; 238:619-627. [PMID: 37132028 DOI: 10.1177/09544119231172272] [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] [Indexed: 05/04/2023]
Abstract
Individuals with spinal cord injury (SCI) usually develop neurogenic detrusor overactivity (NDO), resulting in bladder urgency and incontinence, and reduced quality of life. Electrical stimulation of the genital nerves (GNS) can inhibit uncontrolled bladder contractions in individuals with SCI. An automated closed-loop bladder neuromodulation system currently does not exist but could improve this approach. We have developed a custom algorithm to identify bladder contractions and trigger stimulation from bladder pressure data without need for abdominal pressure measurement. The goal of this pilot study was to test the feasibility of automated closed-loop GNS using our custom algorithm to identify and inhibit reflex bladder contractions in real time. Experiments were conducted in a single session in a urodynamics laboratory in four individuals with SCI and NDO. Each participant completed standard cystometrograms without and with GNS. Our custom algorithm monitored bladder vesical pressure and controlled when GNS was turned on and off. The custom algorithm detected bladder contractions in real time, successfully inhibiting a total of 56 contractions across all four subjects. There were eight false positives, six of those occurring in one subject. It took approximately 4.0 ± 2.6 s for the algorithm to detect the onset of a bladder contraction and trigger stimulation. The algorithm maintained stimulation for approximately 3.5 ± 1.7 s, which was enough to inhibit activity and relieve feelings of urgency. Automated closed-loop stimulation was well-tolerated and subjects reported that algorithm decisions generally matched with their perceptions of bladder activity. The custom algorithm automatically, successfully identified bladder contractions to trigger stimulation to inhibit bladder contractions acutely. Closed-loop neuromodulation using our custom algorithm is feasible, but further testing is needed refine this approach for use in a home environment.
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Affiliation(s)
- Steve Majerus
- Advanced Platform Technology Center, Louis Stokes Cleveland VA Medical Center, Cleveland, OH, USA
- Department of Electrical, Computer, and Systems Engineering, Case Western Reserve University, Cleveland, OH, USA
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Carvell Nguyen
- Division of Urology, MetroHealth Medical Center, Cleveland, OH, USA
| | - Steven Brose
- Cleveland FES Center, Syracuse VA Medical Center, Syracuse, NY, USA
- Physical Medicine and Rehabilitation, SUNY Upstate Medical University, Syracuse, NY, USA
| | - Gregory Nemunaitis
- Physical Medicine and Rehabilitation, Cleveland Clinic, Cleveland, OH, USA
| | - Margot Damaser
- Advanced Platform Technology Center, Louis Stokes Cleveland VA Medical Center, Cleveland, OH, USA
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Dennis J Bourbeau
- Cleveland FES Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Physical Medicine and Rehabilitation, MetroHealth Medical Center, Cleveland, OH, USA
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2
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Bottorff EC, Gupta P, Ippolito GM, Moore MB, Rodriguez GM, Bruns TM. Short-Term Dorsal Genital Nerve Stimulation Increases Subjective Arousal in Women With and Without Spinal Cord Injury: A Preliminary Investigation. Neuromodulation 2024; 27:681-689. [PMID: 38573280 DOI: 10.1016/j.neurom.2024.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 12/23/2023] [Accepted: 02/13/2024] [Indexed: 04/05/2024]
Abstract
OBJECTIVES Female sexual dysfunction (FSD) affects an estimated 40% of women. Unfortunately, FSD is understudied, leading to limited treatment options for FSD. Neuromodulation has shown some success in alleviating FSD symptoms. We developed a pilot study to investigate the short-term effect of electrical stimulation of the dorsal genital nerve and tibial nerve on sexual arousal in healthy women, women with FSD, and women with spinal cord injury (SCI) and FSD. MATERIALS AND METHODS This study comprises a randomized crossover design in three groups: women with SCI, women with non-neurogenic FSD, and women without FSD or SCI. The primary outcome measure was change in vaginal pulse amplitude (VPA) from baseline. Secondary outcome measures were changes in subjective arousal, heart rate, and mean arterial pressure from baseline. Participants attended one or two study sessions where they received either transcutaneous dorsal genital nerve stimulation (DGNS) or tibial nerve stimulation (TNS). At each session, a vaginal photoplethysmography sensor was used to measure VPA. Participants also rated their level of subjective arousal and were asked to report any pelvic sensations. RESULTS We found that subjective arousal increased significantly from before to after stimulation in DGNS study sessions across all women. TNS had no effect on subjective arousal. There were significant differences in VPA between baseline and stimulation, baseline and recovery, and stimulation and recovery periods among participants, but there were no trends across groups or stimulation type. Two participants with complete SCIs experienced genital sensations. CONCLUSIONS To our knowledge, this is the first study to measure sexual arousal in response to short-term neuromodulation in women. This study indicates that short-term DGNS but not TNS can increase subjective arousal, but the effect of stimulation on genital arousal is inconclusive. This study provides further support for DGNS as a treatment for FSD.
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Affiliation(s)
- Elizabeth C Bottorff
- Biomedical Engineering Department, University of Michigan, Ann Arbor, MI, USA; Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
| | - Priyanka Gupta
- Department of Urology, University of Michigan, Ann Arbor, MI, USA
| | | | - Mackenzie B Moore
- Biomedical Engineering Department, University of Michigan, Ann Arbor, MI, USA; Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
| | - Gianna M Rodriguez
- Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI, USA
| | - Tim M Bruns
- Biomedical Engineering Department, University of Michigan, Ann Arbor, MI, USA; Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA.
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3
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Zareen F, Elazab M, Hanzlicek B, Doelman A, Bourbeau D, Majerus SJ, Damaser MS, Karam R. Optimization of activity-driven event detection for long-term ambulatory urodynamics. Proc Inst Mech Eng H 2024; 238:608-618. [PMID: 39104258 DOI: 10.1177/09544119241264304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/07/2024]
Abstract
Lower urinary tract dysfunction (LUTD) is a debilitating condition that affects millions of individuals worldwide, greatly diminishing their quality of life. The use of wireless, catheter-free implantable devices for long-term ambulatory bladder monitoring, combined with a single-sensor system capable of detecting various bladder events, has the potential to significantly enhance the diagnosis and treatment of LUTD. However, these systems produce large amounts of bladder data that may contain physiological noise in the pressure signals caused by motion artifacts and sudden movements, such as coughing or laughing, potentially leading to false positives during bladder event classification and inaccurate diagnosis/treatment. Integration of activity recognition (AR) can improve classification accuracy, provide context regarding patient activity, and detect motion artifacts by identifying contractions that may result from patient movement. This work investigates the utility of including data from inertial measurement units (IMUs) in the classification pipeline, and considers various digital signal processing (DSP) and machine learning (ML) techniques for optimization and activity classification. In a case study, we analyze simultaneous bladder pressure and IMU data collected from an ambulating female Yucatan minipig. We identified 10 important, yet relatively inexpensive to compute signal features, with which we achieve an average 91.5% activity classification accuracy. Moreover, when classified activities are included in the bladder event analysis pipeline, we observe an improvement in classification accuracy, from 81% to 89.0%. These results suggest that certain IMU features can improve bladder event classification accuracy with low computational overhead.Clinical Relevance: This work establishes that activity recognition may be used in conjunction with single-channel bladder event detection systems to distinguish between contractions and motion artifacts for reducing the incorrect classification of bladder events. This is relevant for emerging sensors that measure intravesical pressure alone or for data analysis of bladder pressure in ambulatory subjects that contain significant abdominal pressure artifacts.
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Affiliation(s)
- Farhath Zareen
- Department of Computer Science and Engineering, University of South Florida, Tampa, FL, USA
| | - Mohammed Elazab
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Brett Hanzlicek
- Research Service, Louis Stokes Cleveland VA Medical Center, Cleveland, OH, USA
| | - Adam Doelman
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, BC, Canada
| | - Dennis Bourbeau
- Research Service, Louis Stokes Cleveland VA Medical Center, Cleveland, OH, USA
- Department of Physical Medicine and Rehabilitation, MetroHealth System, Cleveland, OH, USA
| | - Steve Ja Majerus
- Research Service, Louis Stokes Cleveland VA Medical Center, Cleveland, OH, USA
- Department of Electrical, Computer, and Systems Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - Margot S Damaser
- Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
- Research Service, Louis Stokes Cleveland VA Medical Center, Cleveland, OH, USA
| | - Robert Karam
- Department of Computer Science and Engineering, University of South Florida, Tampa, FL, USA
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4
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Yeh SD, Khasanah N, Gustafson KJ, Sun C, Tsai ML, Lin BS, Wu CW, Peng CW. Beneficial carry-over effects of chronic at-home genital nerve stimulation on incontinence in individuals with spinal cord injury: A pragmatic trial. Ann Phys Rehabil Med 2024; 67:101799. [PMID: 38128350 DOI: 10.1016/j.rehab.2023.101799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 06/30/2023] [Accepted: 09/19/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND Genital nerve stimulation (GNS) is a promising, but under-researched, alternative treatment for neurogenic detrusor overactivity (NDO) in those with spinal cord injury (SCI). OBJECTIVES To investigate the urodynamic, quality-of-life (QOL) and carry-over effects of GNS when applied at home for 2 weeks by participants with incomplete SCI and NDO during activities of daily living. METHODS Seven men and 1 woman participated in this 1-month protocol study. Urodynamic and QOL data were gathered during week 1 (baseline measurements), followed by 2 weeks of daily GNS at home using a portable device. GNS was applied either on-demand or thrice daily, depending on the individual's sensation. At week 4, post-stimulation tests were repeated to record any carry-over effect from the GNS. Participants maintained voiding diaries throughout the study. Assessments were carried out at the end of each protocol period in a randomized order. Clinical procedures were conducted at Taipei Medical University Hospital (Taipei, Taiwan). RESULTS Everyone completed the study but only 7 of the 8 participants completed their voiding diary. Two weeks after GNS, average cystometric bladder capacity was increased by 30 % compared to baseline (P< 0.05). A 1-week carry-over effect was demonstrated as this capacity remained, on average, 35 % greater than baseline in week 4 after GNS was stopped (P< 0.05). Incontinence frequency significantly decreased by the end of week 3 (P< 0.05) but no significant improvements were recorded for either detrusor pressure or bladder compliance. CONCLUSIONS Chronic at-home GNS improved cystometric bladder capacity and reduced urinary incontinence for individuals with incomplete SCI and NDO. A carry-over effect of 1 week was observed following GNS treatment. The use of portable GNS treatment that can be applied by the individual at home merits further investigation as alternative treatment for NDO in those with SCI.
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Affiliation(s)
- Shauh-Der Yeh
- Department of Urology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan, ROC; Department of Urology, Taipei Medical University Hospital, Taipei 11031, Taiwan, ROC
| | - Nurida Khasanah
- Graduate Institute of Biomedical Materials and Tissue Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan, ROC; Department of Obstetrics and Gynecology, Faculty of Medicine Public Health and Nursing, Universitas Gadjah Mada-Dr Sardjito General Hospital, Yogyakarta, Indonesia
| | - Kenneth J Gustafson
- Louis Stokes Cleveland VAMC, Cleveland, OH, USA; Cleveland FES Center, Cleveland, OH, USA; Departments of Biomedical Engineering & Urology, Case Western Reserve University, Cleveland, OH, USA
| | - Chi Sun
- School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, 250 Wuxing Street, Taipei 11031, Taiwan, ROC
| | - Mei-Lin Tsai
- Department of Urology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan, ROC; Department of Urology, Taipei Medical University Hospital, Taipei 11031, Taiwan, ROC
| | - Bor-Shing Lin
- Department of Computer Science and Information Engineering, National Taipei University, New Taipei City, Taiwan, ROC
| | - Chun-Wei Wu
- School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, 250 Wuxing Street, Taipei 11031, Taiwan, ROC
| | - Chih-Wei Peng
- Graduate Institute of Biomedical Materials and Tissue Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan, ROC; School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, 250 Wuxing Street, Taipei 11031, Taiwan, ROC; School of Gerontology and Long-Term Care, College of Nursing, Taipei Medical University, Taipei 11031, Taiwan, ROC; Research Center of Biomedical Device, Taipei Medical University, Taipei 11031, Taiwan, ROC.
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5
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Kilgore KL, Anderson KD, Peckham PH. Neuroprosthesis for individuals with spinal cord injury. Neurol Res 2023; 45:893-905. [PMID: 32727296 PMCID: PMC9415059 DOI: 10.1080/01616412.2020.1798106] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 07/14/2020] [Indexed: 01/31/2023]
Abstract
OBJECTIVE Individuals who sustain a traumatic spinal cord injury (SCI) often have a loss of multiple body systems. Significant functional improvement can be gained by individual SCI through the use of neuroprostheses based on electrical stimulation. The most common actions produced are grasp, overhead reach, trunk posture, standing, stepping, bladder/bowel/sexual function, and respiratory functions. METHODS We review the fundamental principles of electrical stimulation, which are established, allowing stimulation to be safely delivered through implanted devices for many decades. We review four common clinical applications for SCI, including grasp/reach, standing/stepping, bladder/bowel function, and respiratory functions. Systems used to implement these functions have many common features, but are also customized based on the functional goals of each approach. Further, neuroprosthetic systems are customized based on the needs of each user. RESULTS & CONCLUSION The results to date show that implanted neuroprostheses can have a significant impact on the health, function, and quality of life for individuals with SCI. A key focus for the future is to make implanted neuroprostheses broadly available to the SCI population.
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Affiliation(s)
- Kevin L. Kilgore
- – MetroHealth System, Cleveland, Ohio
- – Case Western Reserve University, Cleveland, Ohio
- – VA Northeast Ohio Healthcare System, Cleveland, Ohio
| | - Kimberly D. Anderson
- – MetroHealth System, Cleveland, Ohio
- – Case Western Reserve University, Cleveland, Ohio
| | - P. Hunter Peckham
- – MetroHealth System, Cleveland, Ohio
- – Case Western Reserve University, Cleveland, Ohio
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6
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Evans S, Silski L. The evaluation of technical urinary tract complications in kidney transplantation recipients with a prolonged dialysis history. Surgery 2023:S0039-6060(23)00161-7. [PMID: 37150713 DOI: 10.1016/j.surg.2023.03.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 03/27/2023] [Indexed: 05/09/2023]
Affiliation(s)
- Suzanne Evans
- University of Cincinnati Medical Center Cincinnati, Ohio. https://twitter.com/SueEvansMD
| | - Latifa Silski
- University of Cincinnati Medical Center Cincinnati, Ohio.
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7
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Herrity AN, Aslan SC, Mesbah S, Siu R, Kalvakuri K, Ugiliweneza B, Mohamed A, Hubscher CH, Harkema SJ. Targeting bladder function with network-specific epidural stimulation after chronic spinal cord injury. Sci Rep 2022; 12:11179. [PMID: 35778466 PMCID: PMC9249897 DOI: 10.1038/s41598-022-15315-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 06/22/2022] [Indexed: 11/20/2022] Open
Abstract
Profound dysfunctional reorganization of spinal networks and extensive loss of functional continuity after spinal cord injury (SCI) has not precluded individuals from achieving coordinated voluntary activity and gaining multi-systemic autonomic control. Bladder function is enhanced by approaches, such as spinal cord epidural stimulation (scES) that modulates and strengthens spared circuitry, even in cases of clinically complete SCI. It is unknown whether scES parameters specifically configured for modulating the activity of the lower urinary tract (LUT) could improve both bladder storage and emptying. Functional bladder mapping studies, conducted during filling cystometry, identified specific scES parameters that improved bladder compliance, while maintaining stable blood pressure, and enabled the initiation of voiding in seven individuals with motor complete SCI. Using high-resolution magnetic resonance imaging and finite element modeling, specific neuroanatomical structures responsible for modulating bladder function were identified and plotted as heat maps. Data from this pilot clinical trial indicate that scES neuromodulation that targets bladder compliance reduces incidences of urinary incontinence and provides a means for mitigating autonomic dysreflexia associated with bladder distention. The ability to initiate voiding with targeted scES is a key step towards regaining volitional control of LUT function, advancing the application and adaptability of scES for autonomic function.
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Affiliation(s)
- April N Herrity
- Kentucky Spinal Cord Injury Research Center, Department of Neurological Surgery, The University of Louisville, 220 Abraham Flexner Way, Suite 1518, Louisville, KY, 40202, USA. .,Department of Neurological Surgery, University of Louisville, Louisville, KY, USA. .,Department of Physiology, University of Louisville, Louisville, KY, USA.
| | - Sevda C Aslan
- Kentucky Spinal Cord Injury Research Center, Department of Neurological Surgery, The University of Louisville, 220 Abraham Flexner Way, Suite 1518, Louisville, KY, 40202, USA.,Department of Neurological Surgery, University of Louisville, Louisville, KY, USA
| | - Samineh Mesbah
- Kentucky Spinal Cord Injury Research Center, Department of Neurological Surgery, The University of Louisville, 220 Abraham Flexner Way, Suite 1518, Louisville, KY, 40202, USA.,Department of Neurological Surgery, University of Louisville, Louisville, KY, USA
| | - Ricardo Siu
- Kentucky Spinal Cord Injury Research Center, Department of Neurological Surgery, The University of Louisville, 220 Abraham Flexner Way, Suite 1518, Louisville, KY, 40202, USA.,Department of Neurological Surgery, University of Louisville, Louisville, KY, USA
| | - Karthik Kalvakuri
- Kentucky Spinal Cord Injury Research Center, Department of Neurological Surgery, The University of Louisville, 220 Abraham Flexner Way, Suite 1518, Louisville, KY, 40202, USA
| | - Beatrice Ugiliweneza
- Kentucky Spinal Cord Injury Research Center, Department of Neurological Surgery, The University of Louisville, 220 Abraham Flexner Way, Suite 1518, Louisville, KY, 40202, USA.,Department of Neurological Surgery, University of Louisville, Louisville, KY, USA.,Department of Health Sciences, University of Louisville, Louisville, KY, USA
| | - Ahmad Mohamed
- Department of Urology, University of Louisville, Louisville, KY, USA
| | - Charles H Hubscher
- Kentucky Spinal Cord Injury Research Center, Department of Neurological Surgery, The University of Louisville, 220 Abraham Flexner Way, Suite 1518, Louisville, KY, 40202, USA.,Department of Anatomical Sciences and Neurobiology, University of Louisville, Louisville, KY, USA
| | - Susan J Harkema
- Kentucky Spinal Cord Injury Research Center, Department of Neurological Surgery, The University of Louisville, 220 Abraham Flexner Way, Suite 1518, Louisville, KY, 40202, USA.,Department of Neurological Surgery, University of Louisville, Louisville, KY, USA
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8
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Hoey RF, Medina-Aguiñaga D, Khalifa F, Ugiliweneza B, Wang D, Zdunowski S, Fell J, Naglah A, El-Baz AS, Herrity AN, Harkema SJ, Hubscher CH. Thoracolumbar epidural stimulation effects on bladder and bowel function in uninjured and chronic transected anesthetized rats. Sci Rep 2022; 12:2137. [PMID: 35136100 PMCID: PMC8826941 DOI: 10.1038/s41598-022-06011-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 01/18/2022] [Indexed: 11/09/2022] Open
Abstract
Pre-clinical studies have shown that spinal cord epidural stimulation (scES) at the level of pelvic and pudendal nerve inputs/outputs (L5-S1) alters storage and/or emptying functions of both the bladder and bowel. The current mapping experiments were conducted to investigate scES efficacy at the level of hypogastric nerve inputs/outputs (T13-L2) in male and female rats under urethane anesthesia. As found with L5-S1 scES, T13-L2 scES at select frequencies and intensities of stimulation produced an increase in inter-contraction interval (ICI) in non-injured female rats but a short-latency void in chronic T9 transected rats, as well as reduced rectal activity in all groups. However, the detrusor pressure during the lengthened ICI (i.e., urinary hold) remained at a low pressure and was not elevated as seen with L5-S1 scES, an effect that's critical for translation to the clinic as high fill pressures can damage the kidneys. Furthermore, T13-L2 scES was shown to stimulate voiding post-transection by increasing bladder activity while also directly inhibiting the external urethral sphincter, a pattern necessary to overcome detrusor-sphincter dyssynergia. Additionally, select scES parameters at T13-L2 also increased distal colon activity in all groups. Together, the current findings suggest that optimization of scES for bladder and bowel will likely require multiple electrode cohorts at different locations that target circuitries coordinating sympathetic, parasympathetic and somatic outputs.
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Affiliation(s)
- Robert F Hoey
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, KY, USA.,Physical Medicine and Rehabilitation Department, MetroHealth Rehabilitation Institute of Ohio, Cleveland, OH, USA
| | - Daniel Medina-Aguiñaga
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, KY, USA
| | - Fahmi Khalifa
- Bioengineering Department, University of Louisville J. B. Speed School of Engineering, Louisville, KY, USA
| | - Beatrice Ugiliweneza
- Department of Neurological Surgery, University of Louisville School of Medicine, Louisville, KY, USA.,Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA.,Department of Health Management and Systems Science, School of Public Health and Information Science, University of Louisville, Louisville, KY, USA
| | - Dengzhi Wang
- Department of Neurological Surgery, University of Louisville School of Medicine, Louisville, KY, USA.,Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA
| | - Sharon Zdunowski
- Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA
| | - Jason Fell
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, KY, USA
| | - Ahmed Naglah
- Bioengineering Department, University of Louisville J. B. Speed School of Engineering, Louisville, KY, USA
| | - Ayman S El-Baz
- Bioengineering Department, University of Louisville J. B. Speed School of Engineering, Louisville, KY, USA
| | - April N Herrity
- Department of Neurological Surgery, University of Louisville School of Medicine, Louisville, KY, USA.,Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA
| | - Susan J Harkema
- Department of Neurological Surgery, University of Louisville School of Medicine, Louisville, KY, USA.,Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA
| | - Charles H Hubscher
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, KY, USA. .,Kentucky Spinal Cord Injury Research Center, University of Louisville, Louisville, KY, USA.
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9
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Parittotokkaporn S, Varghese C, O'Grady G, Lawrence A, Svirskis D, O'Carroll SJ. Transcutaneous Electrical Stimulation for Neurogenic Bladder Dysfunction Following Spinal Cord Injury: Meta-Analysis of Randomized Controlled Trials. Neuromodulation 2021; 24:1237-1246. [PMID: 34013608 DOI: 10.1111/ner.13459] [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: 11/06/2020] [Revised: 04/20/2021] [Accepted: 04/26/2021] [Indexed: 02/01/2023]
Abstract
OBJECTIVES To assess the efficacy of transcutaneous electrical nerve stimulation (TENS) for neurogenic bladder dysfunction secondary to spinal cord injury (SCI). MATERIALS AND METHODS A systematic search of MEDLINE, EMBASE, Web of Science, Scopus, and Cochrane libraries up to February 2021 was performed using PRISMA methodology. All randomized controlled trials (RCTs) that studied TENS for neurogenic bladder in a SCI population were included. The primary outcomes of interest were maximum cystometric capacity (MCC) and maximum detrusor pressure (Pdet). Meta-analysis was conducted with RevMan v5.3. RESULTS Six RCTs involving 353 participants were included. Meta-analysis showed that TENS significantly increased MCC (standardized mean difference 1.11, 95% confidence interval [CI] 0.08-2.14, p = 0.03, I2 = 54%) in acute SCI. No benefits were seen for maximum Pdet. TENS was associated with no major adverse events. CONCLUSIONS TENS may be an effective, safe intervention for neurogenic bladder dysfunction following SCI. Further studies are essential to confirm these results and more work is required to determine optimal stimulation parameters and duration of the treatment.
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Affiliation(s)
- Sam Parittotokkaporn
- Department of Anatomy and Medical Imaging, School of Medical Sciences, Faculty of Medical and Health Sciences and the Centre for Brain Research, University of Auckland, Auckland, New Zealand
| | - Chris Varghese
- Department of Surgery, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Gregory O'Grady
- Department of Surgery, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.,Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Anna Lawrence
- Auckland Spinal Rehabilitation Unit (ASRU), Counties Manukau Health, Auckland, New Zealand
| | - Darren Svirskis
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Simon J O'Carroll
- Department of Anatomy and Medical Imaging, School of Medical Sciences, Faculty of Medical and Health Sciences and the Centre for Brain Research, University of Auckland, Auckland, New Zealand
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10
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Bourbeau D, Creasey G, French J, Grill WM, Howley S, Krassioukov A, Moritz C, Santacruz B, Thor K, Wheeler T. A roadmap for advancing neurostimulation approaches for bladder and bowel function after spinal cord injury. Spinal Cord 2020; 58:1227-1232. [PMID: 32895476 DOI: 10.1038/s41393-020-00544-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 08/21/2020] [Accepted: 08/26/2020] [Indexed: 11/09/2022]
Affiliation(s)
- Dennis Bourbeau
- Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, OH, USA. .,MetroHealth Medical System, Cleveland, OH, USA.
| | | | | | - Warren M Grill
- Department of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Susan Howley
- Christopher and Dana Reeve Foundation, New York, NY, USA
| | - Andrei Krassioukov
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, BC, Canada
| | - Chet Moritz
- Departments of Electrical and Computer Engineering, Rehabilitation Medicine, and Physiology & Biophysics, Center for Neurotechnology, University of Washington, Seattle, WA, USA
| | | | - Karl Thor
- Dignify Therapeutics Inc., Durham, NC, USA
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11
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Non-invasive neuromodulation for bowel, bladder and sexual restoration following spinal cord injury: A systematic review. Clin Neurol Neurosurg 2020; 194:105822. [DOI: 10.1016/j.clineuro.2020.105822] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/20/2020] [Accepted: 03/30/2020] [Indexed: 01/30/2023]
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12
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Doherty SP, Vanhoestenberghe A, Duffell LD, Hamid R, Knight SL. Ambulatory urodynamic monitoring assessment of dorsal genital nerve stimulation for suppression of involuntary detrusor contractions following spinal cord injury: a pilot study. Spinal Cord Ser Cases 2020; 6:30. [PMID: 32355163 PMCID: PMC7192939 DOI: 10.1038/s41394-020-0279-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 03/27/2020] [Accepted: 03/28/2020] [Indexed: 11/08/2022] Open
Abstract
STUDY DESIGN A prospective interventional pilot study using within-individual comparisons. OBJECTIVES To assess the effect of dorsal genital nerve stimulation (DGNS) on urine-storage parameters in participants with spinal cord injury (SCI) and neurogenic detrusor overactivity (NDO) during natural bladder filling. SETTING The London Spinal Cord Injuries Centre at the Royal National Orthopaedic Hospital, Stanmore, UK. METHODS Ambulatory urodynamic monitoring (AUM) was carried out with and without DGNS, before and after a week of using DGNS at home. DGNS was applied on-demand by four participants with bladder sensation, and both continuously and intermittently by one participant with absent sensation. A Wilcoxon sign-rank test was used to test paired results of changes within an AUM session. RESULTS Urodynamic outcomes were improved using DGNS. Bladder capacity was increased from 244 ± 59 to 346 ± 61 ml (p = 0.0078), a mean change of 46 ± 25%. Maximum detrusor pressure was decreased from 58 ± 18 to 47 ± 18 cmH2O (p = 0.0156), a change of 17 ± 13%, and average peak detrusor pressure was decreased from 56 ± 16 to 31 ± 128 cmH2O (p = 0.0156), a mean reduction of 50 ± 19%. There was an increase in the number of detrusor contractions from the first involuntary detrusor contraction to a strong desire, urgency or incontinence, from 1.5 ± 1.4 to 4.3 ± 1.7, and an increase in time of 23 ± 22 min. There were no changes in baseline outcomes following home use of DGNS. CONCLUSIONS DGNS may be applied on-demand, intermittently or continuously, to increase bladder capacity, decrease storage pressures and provide extra time. Improvements were made in addition to existing antimuscarinic medication regimes.
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Affiliation(s)
- Sean P Doherty
- Aspire Centre for Rehabilitation Engineering and Assistive Technology, University College London, London, UK.
- London Spinal Cord Injury Centre, Royal National Orthopaedic Hospital, London, UK.
| | - Anne Vanhoestenberghe
- Aspire Centre for Rehabilitation Engineering and Assistive Technology, University College London, London, UK
| | - Lynsey D Duffell
- Aspire Centre for Rehabilitation Engineering and Assistive Technology, University College London, London, UK
| | - Rizwan Hamid
- London Spinal Cord Injury Centre, Royal National Orthopaedic Hospital, London, UK
| | - Sarah L Knight
- London Spinal Cord Injury Centre, Royal National Orthopaedic Hospital, London, UK
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Doherty S, Vanhoestenberghe A, Duffell L, Hamid R, Knight S. A Urodynamic Comparison of Neural Targets for Transcutaneous Electrical Stimulation to Acutely Suppress Detrusor Contractions Following Spinal Cord Injury. Front Neurosci 2019; 13:1360. [PMID: 31956301 PMCID: PMC6951414 DOI: 10.3389/fnins.2019.01360] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 12/02/2019] [Indexed: 01/18/2023] Open
Abstract
Objectives To assess and compare the effect of transcutaneous Dorsal Genital Nerve Stimulation (DGNS), Tibial Nerve Stimulation (TNS), Sacral Nerve Stimulation (SNS), and Spinal Stimulation (SS) on Neurogenic Detrusor Overactivity (NDO) and bladder capacity in people with Spinal Cord Injuries (SCI). Materials and Methods Seven male participants with supra-sacral SCI were tested. Standard cystometry (CMG) was performed to assess bladder activity at baseline and with stimulation applied at each site. This was conducted over four separate sessions. All stimulation was monophasic, 15 Hz, 200 μS pulses and applied at maximum tolerable amplitude. Results were analysed against individual control results from within the same session. Results Dorsal Genital Nerve Stimulation increased bladder capacity by 153 ± 146 ml (p = 0.016) or 117 ± 201%. DGNS, TNS and SNS all increased the volume held following the first reflex contraction, by 161 ± 175, 46 ± 62, and 34 ± 33 ml (p = 0.016, p = 0.031, p = 0.016), respectively. SS results showed small reduction of 33 ± 26 ml (p = 0.063) from baseline bladder capacity in five participants. Maximum Detrusor Pressure before leakage was increased during TNS, by 10 ± 13 cmH2O (p = 0.031) but was unchanged during stimulation of other sites. DGNS only was able to suppress at least one detrusor contraction in five participants and reduced first peak detrusor pressure below 40 cmH2O in these 5. Continuous TNS, SNS, and SS produced non-significant changes in bladder capacity from baseline, comparable to conditional stimulation. Increase in bladder capacity correlated with stimulation amplitude for DGNS but not TNS, SNS or SS. Conclusion In this pilot study DGNS acutely suppressed detrusor contractions and increased bladder capacity whereas TNS, SNS, and SS did not. This is the first within individual comparison of surface stimulation sites for management of NDO in SCI individuals.
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Affiliation(s)
- Sean Doherty
- Aspire Centre for Rehabilitation Engineering and Assistive Technologies, University College London, London, United Kingdom.,London Spinal Cord Injury Centre, Royal National Orthopaedic Hospital, London, United Kingdom
| | - Anne Vanhoestenberghe
- Aspire Centre for Rehabilitation Engineering and Assistive Technologies, University College London, London, United Kingdom
| | - Lynsey Duffell
- Aspire Centre for Rehabilitation Engineering and Assistive Technologies, University College London, London, United Kingdom
| | - Rizwan Hamid
- London Spinal Cord Injury Centre, Royal National Orthopaedic Hospital, London, United Kingdom
| | - Sarah Knight
- London Spinal Cord Injury Centre, Royal National Orthopaedic Hospital, London, United Kingdom
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Ereifej ES, Shell CE, Schofield JS, Charkhkar H, Cuberovic I, Dorval AD, Graczyk EL, Kozai TDY, Otto KJ, Tyler DJ, Welle CG, Widge AS, Zariffa J, Moritz CT, Bourbeau DJ, Marasco PD. Neural engineering: the process, applications, and its role in the future of medicine. J Neural Eng 2019; 16:063002. [PMID: 31557730 DOI: 10.1088/1741-2552/ab4869] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
OBJECTIVE Recent advances in neural engineering have restored mobility to people with paralysis, relieved symptoms of movement disorders, reduced chronic pain, restored the sense of hearing, and provided sensory perception to individuals with sensory deficits. APPROACH This progress was enabled by the team-based, interdisciplinary approaches used by neural engineers. Neural engineers have advanced clinical frontiers by leveraging tools and discoveries in quantitative and biological sciences and through collaborations between engineering, science, and medicine. The movement toward bioelectronic medicines, where neuromodulation aims to supplement or replace pharmaceuticals to treat chronic medical conditions such as high blood pressure, diabetes and psychiatric disorders is a prime example of a new frontier made possible by neural engineering. Although one of the major goals in neural engineering is to develop technology for clinical applications, this technology may also offer unique opportunities to gain insight into how biological systems operate. MAIN RESULTS Despite significant technological progress, a number of ethical and strategic questions remain unexplored. Addressing these questions will accelerate technology development to address unmet needs. The future of these devices extends far beyond treatment of neurological impairments, including potential human augmentation applications. Our task, as neural engineers, is to push technology forward at the intersection of disciplines, while responsibly considering the readiness to transition this technology outside of the laboratory to consumer products. SIGNIFICANCE This article aims to highlight the current state of the neural engineering field, its links with other engineering and science disciplines, and the challenges and opportunities ahead. The goal of this article is to foster new ideas for innovative applications in neurotechnology.
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Affiliation(s)
- Evon S Ereifej
- Veteran Affairs Ann Arbor Healthcare System, Ann Arbor, MI, United States of America. Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States of America. Department of Neurology, University of Michigan, Ann Arbor, MI, United States of America. Advanced Platform Technology Center, Louis Stokes Cleveland VA Medical Center, Cleveland, OH, United States of America
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Effects of Genital Nerve Stimulation Amplitude on Bladder Capacity in Spinal Cord Injured Subjects. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 2019:1248342. [PMID: 31341487 PMCID: PMC6612956 DOI: 10.1155/2019/1248342] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 05/27/2019] [Accepted: 06/09/2019] [Indexed: 12/05/2022]
Abstract
Background/Purpose Few studies have investigated the effects of changing the amplitude of dorsal genital nerve stimulation (GNS) on the inhibition of neurogenic detrusor overactivity in individuals with spinal cord injury (SCI). The present study determined the acute effects of changes in GNS amplitude on bladder capacity gain in individuals with SCI and neurogenic detrusor overactivity. Methods Cystometry was used to assess the effects of continuous GNS on bladder capacity during bladder filling. The cystometric trials were conducted in a randomized sequence of cystometric fills with continuous GNS at stimulation amplitudes ranging from 1 to 4 times of threshold (T) required to elicit the genitoanal reflex. Results The bladder capacity increased minimally and maximally by approximately 34% and 77%, respectively, of the baseline bladder capacity at 1.5 T and 3.2 T, respectively. Stimulation amplitude and bladder capacity were significantly correlated (R = 0.55, P = 0.01). Conclusion This study demonstrates a linear correlation between the stimulation amplitude ranging from 1 to 4T and bladder capacity gain in individuals with SCI in acute GNS experiments. However, GNS amplitude out of the range of 1-4T might not be exactly a linear relationship due to subthreshold or saturation factors. Thus, further research is needed to examine this issue. Nevertheless, these results may be critical in laying the groundwork for understanding the effectiveness of acute GNS in the treatment of neurogenic detrusor overactivity.
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Wilson RD, Bryden AM, Kilgore KL, Makowski N, Bourbeau D, Kowalski KE, DiMarco AF, Knutson JS. Neuromodulation for Functional Electrical Stimulation. Phys Med Rehabil Clin N Am 2019; 30:301-318. [DOI: 10.1016/j.pmr.2018.12.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Bourbeau DJ, Gustafson KJ, Brose SW. At-home genital nerve stimulation for individuals with SCI and neurogenic detrusor overactivity: A pilot feasibility study. J Spinal Cord Med 2019; 42:360-370. [PMID: 29334338 PMCID: PMC6522983 DOI: 10.1080/10790268.2017.1422881] [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: 10/18/2022] Open
Abstract
OBJECTIVE Neurogenic bladder dysfunction, including neurogenic detrusor overactivity (NDO) is one of the most clinically significant problems for persons with spinal cord injury (SCI), affecting health and quality of life. Genital nerve stimulation (GNS) can acutely inhibit NDO-related reflex bladder contractions and increase bladder capacity. However, it is unknown if GNS can improve urinary continence or help meet individuals' bladder management goals during sustained use, which is required for GNS to be clinically effective. DESIGN Subjects maintained voiding diaries during a one-month control period without stimulation, one month with at-home GNS, and one month after GNS. Urodynamics and quality of life assessments were conducted after each treatment period, and a satisfaction survey was taken at study completion. SETTING Subject screening and clinical procedures were conducted at the Louis Stokes Cleveland VA Medical Center. Stimulation use and voiding diary entries were conducted in subjects' homes. PARTICIPANTS Subjects included five men with SCI and NDO. INTERVENTIONS This study tested one month of at-home portable non-invasive GNS. OUTCOME MEASURES The primary outcome measure was leakage events per day. Secondary outcome measures included self-reported subject satisfaction, bladder capacity, and stimulator use frequency. RESULTS GNS reduced the number of leakage events from 1.0 ± 0.5 to 0.1 ± 0.4 leaks per day in the four subjects who reported incontinence data. All study participants were satisfied that GNS met their bladder goals; wanted to continue using GNS; and would recommend it to others. CONCLUSIONS Short term at-home GNS reduced urinary incontinence and helped subjects meet their bladder management goals. These data inform the design of a long-term clinical trial testing of GNS as an approach to reduce NDO.
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Affiliation(s)
- Dennis J. Bourbeau
- Louis Stokes Cleveland Department of Veterans Affairs Medical Center, ClevelandOhio,Department of Physical Medicine and Rehabilitation, MetroHealth Medical Center, Cleveland, Ohio,Cleveland VA Functional Electrical Stimulation Center, Cleveland, Ohio,Correspondence to: Dennis J. Bourbeau, PhD. Research Service 151(W), 10701 East Blvd, Cleveland, OH44106, USA.
| | - Kenneth J. Gustafson
- Louis Stokes Cleveland Department of Veterans Affairs Medical Center, ClevelandOhio,Cleveland VA Functional Electrical Stimulation Center, Cleveland, Ohio,Departments of Biomedical Engineering and Urology, Case Western Reserve University, Cleveland, Ohio
| | - Steven W. Brose
- Louis Stokes Cleveland Department of Veterans Affairs Medical Center, ClevelandOhio,Cleveland VA Functional Electrical Stimulation Center, Cleveland, Ohio,Department of Physical Medicine & Rehabilitation, Case Western Reserve University, Cleveland, Ohio,Heritage College of Osteopathic Medicine, Ohio University, Athens, Ohio
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