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El Semary MM, Elrewainy RM, Nagaty A, Maged M, Abdelhakiem NM. Effect of magnetic therapy in bladder dysfunction and quality of life in paraplegic patients. NeuroRehabilitation 2024; 54:611-618. [PMID: 38875052 DOI: 10.3233/nre-240060] [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: 06/16/2024]
Abstract
BACKGROUND Urinary dysfunction is linked to spinal cord injury (SCI). The quality of life (QoL) declines in both neurogenic bladder impairment and non-disordered patients. OBJECTIVE To ascertain the effectiveness of pulsed magnetic therapy on urinary impairment and QoL in individuals with traumatic incomplete SCI. METHODS This study included forty male paraplegic subjects with neurogenic detrusor overactivity (NDO) for more than one year following incomplete SCI between T6-T12. Their ages ranged from 20 to 35 and they engaged in therapy for three months. The subjects were divided into two groups of equal size. Individuals in Group I were managed via pulsed magnetic therapy once per week plus pelvic floor training three times a week. Individuals in Group II were managed with only three times a week for pelvic floor training. All patients were examined for bladder cystometric investigations, pelvic-floor electromyography (EMG), and SF-Qualiveen questionnaire. RESULTS There was a noteworthy increment in individuals in Group I in volume of bladder at first desire to void and maximum cystometric capacity, detrusor pressure at Qmax, and maximum flow rate. There was a momentous increment in Group I in measures of evaluation of EMG biofeedback. There was a notable rise in Group I in SF-Qualiveen questionnaire. CONCLUSION Magnetic stimulation should be favored as beneficial adjunct to traditional therapy in the management of bladder impairment and enhancing QoL in individuals with SCI.
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Affiliation(s)
- Moataz Mohamed El Semary
- Department of Physical Therapy for Neurology and Neurosurgery, Faculty of Physical Therapy, Cairo University, Cairo, Egypt
- Department of Physical Therapy and Health Rehabilitation, College of Applied Medical Sciences (CAMS), Jouf University, Al Jawf, Saudi Arabia
| | - Rasha Mohamed Elrewainy
- Department of Physical Therapy for Neurology and Neurosurgery, Faculty of Physical Therapy, Cairo University, Cairo, Egypt
| | - Ahmed Nagaty
- Department of Neurosurgery, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Mai Maged
- Egyptian Clinical Neurophysiology Society, Cairo, Egypt
| | - Nadia Mohamed Abdelhakiem
- Department of Physical Therapy for Neuromuscular Disorders and its Surgery, Faculty of Physical Therapy, Deraya University, Minya, Egypt
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Johns J, Krogh K, Rodriguez GM, Eng J, Haller E, Heinen M, Laredo R, Longo W, Montero-Colon W, Korsten M. Management of Neurogenic Bowel Dysfunction in Adults after Spinal Cord Injury Suggested citation: Jeffery Johns, Klaus Krogh, Gianna M. Rodriguez, Janice Eng, Emily Haller, Malorie Heinen, Rafferty Laredo, Walter Longo, Wilda Montero-Colon, Mark Korsten. Management of Neurogenic Bowel Dysfunction in Adults after Spinal Cord Injury: Clinical Practice Guideline for Healthcare Providers. Journal of Spinal Cord Med. 2021. Doi:10.1080/10790268.2021.1883385. J Spinal Cord Med 2021; 44:442-510. [PMID: 33905316 PMCID: PMC8115581 DOI: 10.1080/10790268.2021.1883385] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Jeffery Johns
- Department of Physical Medicine and Rehabilitation, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Klaus Krogh
- Department of Hepatology and Gastroenterology, Aarhus University Hospital, Aarhus, Denmark
| | - Gianna M Rodriguez
- Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, Michigan, USA
| | - Janice Eng
- Department of Physical Therapy, University of British Columbia, Vancouver, British Columbia, Canada
| | - Emily Haller
- Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, Michigan, USA
| | - Malorie Heinen
- University of Kansas Health Care System, Kansas City, Kansas, USA
| | | | - Walter Longo
- Department of Surgery, Division of Gastrointestinal Surgery, Yale University, New Haven, Connecticut, USA
| | | | - Mark Korsten
- Icahn School of Medicine at Mount Sinai, Department of Internal Medicine, Division of Gastroenterology, New York, New York, USA
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Johns J, Krogh K, Rodriguez GM, Eng J, Haller E, Heinen M, Laredo R, Longo W, Montero-Colon W, Wilson C, Korsten M. Management of Neurogenic Bowel Dysfunction in Adults after Spinal Cord Injury: Clinical Practice Guideline for Health Care Providers. Top Spinal Cord Inj Rehabil 2021; 27:75-151. [PMID: 34108835 PMCID: PMC8152174 DOI: 10.46292/sci2702-75] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jeffery Johns
- Vanderbilt University Medical Center, Nashville, Tennessee USA
| | | | | | - Janice Eng
- University of British Columbia, Vancouver Canada
| | | | - Malorie Heinen
- University of Kansas Health Care System, Kansas City, Kansas USA
| | | | | | | | - Catherine Wilson
- Diplomate, American Board of Professional Psychology (RP) Private Practice, Denver, Colorado
| | - Mark Korsten
- Icahn School of Medicine @ Mt Sinai, New York, New York USA
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Steadman CJ, Grill WM. Spinal cord stimulation for the restoration of bladder function after spinal cord injury. Healthc Technol Lett 2020; 7:87-92. [PMID: 32754343 PMCID: PMC7353924 DOI: 10.1049/htl.2020.0026] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 05/15/2020] [Accepted: 05/15/2020] [Indexed: 12/20/2022] Open
Abstract
Spinal cord injury (SCI) results in the inability to empty the bladder voluntarily, and neurogenic detrusor overactivity (NDO) and detrusor sphincter dyssynergia (DSD) negatively impact both the health and quality of life of persons with SCI. Current approaches to treat bladder dysfunction in persons with SCI, including self-catheterisation and anticholinergic medications, are inadequate, and novel approaches are required to restore continence with increased bladder capacity, as well as to provide predictable and efficient on-demand voiding. Improvements in bladder function following SCI have been documented using a number of different modalities of spinal cord stimulation (SCS) in both persons with SCI and animal models, including SCS alone or SCS with concomitant activity-based training. Improvements include increased volitional voiding, voided volumes, bladder capacity, and quality of life, as well as decreases in NDO and DSD. Further, SCS is a well-developed therapy for chronic pain, and existing Food And Drug Administration (FDA)-approved devices provide a clear pathway to sustainable commercial availability and impact. However, the effective stimulation parameters and the appropriate timing and location of stimulation for SCS-mediated restoration of bladder function require further study, and studies are needed to determine underlying mechanisms of action.
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Affiliation(s)
- Casey J Steadman
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Warren M Grill
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA.,Department of Electrical and Computer Engineering, Duke University, Durham, NC 27708, USA.,Department of Neurobiology, Duke University, Durham, NC 27708, USA.,Department of Neurosurgery, Duke University, Durham, NC 27708, USA
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Musculoskeletal Ultrasonography Assessment of Functional Magnetic Stimulation on the Effect of Glenohumeral Subluxation in Acute Poststroke Hemiplegic Patients. BIOMED RESEARCH INTERNATIONAL 2018; 2018:6085961. [PMID: 30065941 PMCID: PMC6051292 DOI: 10.1155/2018/6085961] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 02/19/2018] [Accepted: 03/19/2018] [Indexed: 12/18/2022]
Abstract
Background Glenohumeral subluxation (GHS) is common in patients with acute hemiplegia caused by stroke. GHS and upper limb function are closely related. Objective Using musculoskeletal ultrasonography (MSUS) to objectively evaluate the efficacy of functional magnetic stimulation (FMS) in the treatment of GHS in acute hemiplegic patients after stroke. Methods The study used prospective case control study. Stroke patients with GHS were recruited and assigned to control group and FMS group. Control group received electrode stimulation at the supraspinatus and deltoid muscles of the hemiplegic side, while FMS group was stimulated at the same locations. Before and after treatment, the distances of the acromion-greater tuberosity (AGT), acromion-lesser tuberosity (ALT), acromiohumeral distance (AHD), supraspinatus thickness (SST), and deltoid muscle thickness (DMT) in patients' bilateral shoulder joint were measured by MSUS, respectively. Meanwhile, Fugl-Meyer Assessment (FMA) was used to evaluate the improvement of upper limb function. Results 30 patients were recruited. After FMS treatment, there was a significant decrease in the difference value between ipsilateral side and contralateral side of AGT [t = 8.595, P < 0.01], ALT [t = 11.435, P < 0.01], AHD [t = 8.375, P < 0.01], SST [t = 15.394, P < 0.01], and DMT [t = 24.935, P < 0.01], and FMA score increased [t = −13.315, P < 0.01]. Compared with control group, FMS group decreased more significantly in the difference value between ipsilateral side and contralateral side of AGT [t = 2.161, P < 0.05], ALT [t = 3.332, P < 0.01], AHD [t = 8.768, P < 0.01], SST [t = 6.244, P < 0.01], and the DMT [t = 3.238, P < 0.01], and FMA score increased more significantly in FMS group [t = 7.194, P < 0.01]. Conclusion The study preliminarily shows that the MSUS can objectively and dynamically evaluate the treatment effect of GHS in hemiplegic patients. Meanwhile, compared with control group, the FMS is more effective and has fewer side effects, and the long-term effect of FMS is worth further study. This trial is registered with ChiCTR1800015352.
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Grams L, Garrido G, Villacieros J, Ferro A. Marginal Micronutrient Intake in High-Performance Male Wheelchair Basketball Players: A Dietary Evaluation and the Effects of Nutritional Advice. PLoS One 2016; 11:e0157931. [PMID: 27383836 PMCID: PMC4934691 DOI: 10.1371/journal.pone.0157931] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 06/07/2016] [Indexed: 11/18/2022] Open
Abstract
Wheelchair basketball has evolved into a high-performance sport over several years, and small variations in player performance can determine the difference between winning and losing. Therefore, adequate micronutrient intake may influence this difference if performance-promoting macronutrient intake and physical fitness are equal between teams. Seventeen elite male wheelchair basketball players belonging to the Spanish National Team participated in this study. Macro- and micronutrient intake were determined using a food-weighing diary over three consecutive days during three training camps in two consecutive years. Current Dietary Reference Intake levels were used to determine the adequacy of intake of seventeen micronutrients of particular interest for athletes. After categorizing the consumed foods into fourteen food groups according to the National Nutrient Database for Standard References (USDA) these groups were used to identify the best predictors of the adequacy of intake for each micronutrient. Total energy intake correlated positively with the adequacy of all micronutrient intake levels, except for vitamins A and E. Five B vitamins and phosphorus, selenium, and iron showed 100% adequacy. All other micronutrient intake levels were found to be inadequate, e.g., vitamin E (51% adequacy) and calcium (73%). The fruit, fish and cereal food groups were found to be predictors of adequate intake of most micronutrients. Together with energy intake (p = .009, η2 = 0.49), the intake of the fruit (p = .032, η2 = 0.39) and egg (p = .036, Kendall's W = 0.42) food groups increased significantly over time, along with improved iodine (p = .008, W = 0.61) and magnesium (p = .030, W = 0.44) adequacy levels. Because the adequacy of micronutrient intake correlates positively with energy intake (R = 0.64, p < .001), a varied diet that includes cereals, fish and fruits is especially important for players with low levels of energy intake. Supplements may be a possible solution if adequate micronutrient intake cannot be achieved through regular dietary intake alone. However, dietary analyses should be conducted on a regular basis throughout the year to improve the nutritional knowledge of the athletes and assure adequate micronutrient intake.
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Affiliation(s)
- Lena Grams
- Department of Health and Human Performance, Faculty of Physical Activity and Sport Sciences, Technical University of Madrid, Madrid, Spain
| | - Guadalupe Garrido
- Department of Health and Human Performance, Faculty of Physical Activity and Sport Sciences, Technical University of Madrid, Madrid, Spain
| | - Jorge Villacieros
- Department of Sports, Faculty of Physical Activity and Sport Sciences, Technical University of Madrid, Madrid, Spain
| | - Amelia Ferro
- Department of Sports, Faculty of Physical Activity and Sport Sciences, Technical University of Madrid, Madrid, Spain
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7
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Influence of repetitive peripheral magnetic stimulation on neural plasticity in the motor cortex related to swallowing. Int J Rehabil Res 2016; 39:263-6. [PMID: 27262135 DOI: 10.1097/mrr.0000000000000180] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The aim of this study was to evaluate the effect of repetitive peripheral magnetic stimulation at two different frequencies (20 and 30 Hz) on cortical excitability in motor areas related to swallowing in healthy individuals. The study participants were 10 healthy normal volunteers (two women and eight men, age range 25-36 years). Repetitive peripheral magnetic stimulation was applied to the submandibular muscle using a parabolic coil at the site where contraction of the suprahyoid muscles was elicited. Stimulation was continued for 10 min (total 1200 pulses) at 20 Hz on 1 day and at 30 Hz on another day, with the stimulation strength set at 90% of the intensity that elicited pain. The motor-evoked potential amplitude of suprahyoid muscles was assessed before, immediately after, and 30 min after stimulation. Stimulations at both 20 and 30 Hz significantly increased motor-evoked potential amplitude (P<0.05), with the increase maintained until 30 min after stimulation. The motor-evoked potential amplitude immediately after stimulation was not significantly different between the 20 and 30 Hz frequencies. The results indicated that repetitive magnetic stimulation increased motor-evoked potential amplitude of swallowing muscles, suggesting facilitation of the motor cortex related to swallowing in healthy individuals.
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Momosaki R, Abo M, Watanabe S, Kakuda W, Yamada N, Kinoshita S. Repetitive Peripheral Magnetic Stimulation With Intensive Swallowing Rehabilitation for Poststroke Dysphagia: An Open-Label Case Series. Neuromodulation 2015; 18:630-4; discussion 634-5. [PMID: 25950817 DOI: 10.1111/ner.12308] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 03/04/2015] [Accepted: 04/01/2015] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The purpose of this pilot study was to determine the safety and feasibility of a six-day protocol of in-hospital repetitive peripheral magnetic stimulation combined with intensive swallowing rehabilitation (rPMS-ISR) for poststroke dysphagia. METHODS The subjects were eight patients with dysphagia caused by bilateral cerebral infarction (age: 62-70; time from onset of stroke: 27-39 months). rPMS was applied to the suprahyoid muscles, at strength set at 90% of the minimal intensity that elicited pain with a parabolic coil. One train of stimuli comprised 20 Hz for 3 sec followed by 27-sec rest. A single session included delivery of repetitive 20 trains of stimuli over 10 min, followed by 20 min of swallowing rehabilitation. Each patient received this combination treatment twice daily, morning and afternoon, over six consecutive days. Swallowing function was evaluated before and after intervention. RESULTS rPMS-ISR induced significant improvement in swallowing ability, laryngeal elevation delay time, penetration aspiration scale, and swallowing quality of life (p < 0.01), but had no significant effect on the functional oral intake scale. CONCLUSION The six-day in-hospital RPMS-ISR protocol seems safe and feasible for poststroke patients with dysphagia. The combination protocol improved swallowing function. Further larger studies are needed to confirm its efficacy.
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Affiliation(s)
- Ryo Momosaki
- Department of Rehabilitation Medicine, The Jikei University School of Medicine, Minato-Ku, Tokyo, Japan
| | - Masahiro Abo
- Department of Rehabilitation Medicine, The Jikei University School of Medicine, Minato-Ku, Tokyo, Japan
| | - Shu Watanabe
- Department of Rehabilitation Medicine, The Jikei University School of Medicine, Minato-Ku, Tokyo, Japan
| | - Wataru Kakuda
- Department of Rehabilitation Medicine, The Jikei University School of Medicine, Minato-Ku, Tokyo, Japan
| | - Naoki Yamada
- Department of Rehabilitation Medicine, The Jikei University School of Medicine, Minato-Ku, Tokyo, Japan
| | - Shoji Kinoshita
- Department of Rehabilitation Medicine, The Jikei University School of Medicine, Minato-Ku, Tokyo, Japan
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Momosaki R, Abo M, Watanabe S, Kakuda W, Yamada N, Mochio K. Functional Magnetic Stimulation Using a Parabolic Coil for Dysphagia After Stroke. Neuromodulation 2013; 17:637-41; discussion 641. [DOI: 10.1111/ner.12137] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Revised: 09/30/2013] [Accepted: 10/25/2013] [Indexed: 11/29/2022]
Affiliation(s)
- Ryo Momosaki
- Department of Rehabilitation Medicine; Jikei University School of Medicine; Tokyo Japan
| | - Masahiro Abo
- Department of Rehabilitation Medicine; Jikei University School of Medicine; Tokyo Japan
| | - Shu Watanabe
- Department of Rehabilitation Medicine; Jikei University School of Medicine; Tokyo Japan
| | - Wataru Kakuda
- Department of Rehabilitation Medicine; Jikei University School of Medicine; Tokyo Japan
| | - Naoki Yamada
- Department of Rehabilitation Medicine; Jikei University School of Medicine; Tokyo Japan
| | - Kenjiro Mochio
- Department of Rehabilitation Medicine; Jikei University School of Medicine; Tokyo Japan
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Pal A, Singh A, Nag TC, Chattopadhyay P, Mathur R, Jain S. Iron oxide nanoparticles and magnetic field exposure promote functional recovery by attenuating free radical-induced damage in rats with spinal cord transection. Int J Nanomedicine 2013; 8:2259-72. [PMID: 23818782 PMCID: PMC3693820 DOI: 10.2147/ijn.s44238] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Iron oxide nanoparticles (IONPs) can attenuate oxidative stress in a neutral pH environment in vitro. In combination with an external electromagnetic field, they can also facilitate axon regeneration. The present study demonstrates the in vivo potential of IONPs to recover functional deficits in rats with complete spinal cord injury. METHODS The spinal cord was completely transected at the T11 vertebra in male albino Wistar rats. Iron oxide nanoparticle solution (25 μg/mL) embedded in 3% agarose gel was implanted at the site of transection, which was subsequently exposed to an electromagnetic field (50 Hz, 17.96 μT for two hours daily for five weeks). RESULTS Locomotor and sensorimotor assessment as well as histological analysis demonstrated significant functional recovery and a reduction in lesion volume in rats with IONP implantation and exposure to an electromagnetic field. No collagenous scar was observed and IONPs were localized intracellularly in the immediate vicinity of the lesion. Further, in vitro experiments to explore the cytotoxic effects of IONPs showed no effect on cell survival. However, a significant decrease in H2O2-mediated oxidative stress was evident in the medium containing IONPs, indicating their free radical scavenging properties. CONCLUSION These novel findings indicate a therapeutic role for IONPs in spinal cord injury and other neurodegenerative disorders mediated by reactive oxygen species.
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Affiliation(s)
- Ajay Pal
- Department of Physiology, All India Institute of Medical Sciences, New Delhi, India
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Krassioukov A, Eng JJ, Claxton G, Sakakibara BM, Shum S. Neurogenic bowel management after spinal cord injury: a systematic review of the evidence. Spinal Cord 2010; 48:718-33. [PMID: 20212501 PMCID: PMC3118252 DOI: 10.1038/sc.2010.14] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
STUDY DESIGN Randomized-controlled trials (RCTs), prospective cohort, case-control, pre-post studies, and case reports that assessed pharmacological and non-pharmacological intervention for the management of the neurogenic bowel after spinal cord injury (SCI) were included. OBJECTIVE To systematically review the evidence for the management of neurogenic bowel in individuals with SCI. SETTING Literature searches were conducted for relevant articles, as well as practice guidelines, using numerous electronic databases. Manual searches of retrieved articles from 1950 to July 2009 were also conducted to identify literature. METHODS Two independent reviewers evaluated each study's quality, using Physiotherapy Evidence Database scale for RCTs and Downs and Black scale for all other studies. The results were tabulated and levels of evidence assigned. RESULTS A total of 2956 studies were found as a result of the literature search. On review of the titles and abstracts, 57 studies met the inclusion criteria. Multifaceted programs are the first approach to neurogenic bowel and are supported by lower levels of evidence. Of the non-pharmacological (conservative and non-surgical) interventions, transanal irrigation is a promising treatment to reduce constipation and fecal incontinence. When conservative management is not effective, pharmacological interventions (for example prokinetic agents) are supported by strong evidence for the treatment of chronic constipation. When conservative and pharmacological treatments are not effective, surgical interventions may be considered and are supported by lower levels of evidence in reducing complications. CONCLUSIONS Often, more than one procedure is necessary to develop an effective bowel routine. Evidence is low for non-pharmacological approaches and high for pharmacological interventions.
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Affiliation(s)
- A Krassioukov
- International Collaboration on Repair Discoveries, Vancouver, British Columbia, Canada.
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Zhou Yi Syuu W, Hsiao I, Lin VWH, Longhurst JC. Modulation of cardiovascular excitatory responses in rats by transcutaneous magnetic stimulation: role of the spinal cord. J Appl Physiol (1985) 2005; 100:926-32. [PMID: 16269522 DOI: 10.1152/japplphysiol.01130.2005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
This study investigated the efficacy of magnetic stimulation on the reflex cardiovascular responses induced by gastric distension in anesthetized rats and compared these responses to those influenced by electroacupuncture (EA). Unilateral magnetic stimulation (30% intensity, 2 Hz) at the Jianshi-Neiguan acupoints (pericardial meridian, P 5-6) overlying the median nerve on the forelimb for 24 min significantly decreased the reflex pressor response by 32%. This effect was noticeable by 20 min of magnetic stimulation and continued for 24 min. Median nerve denervation abolished the inhibitory effect of magnetic stimulation, indicating the importance of somatic afferent input. Unilateral EA (0.3-0.5 mA, 2 Hz) at P 5-6 using similar durations of stimulation similarly inhibited the response (35%). The inhibitory effects of EA occurred earlier and were marginally longer (20 min) than magnetic stimulation. Magnetic stimulation at Guangming-Xuanzhong acupoints (gallbladder meridian, GB 37-39) overlying the superficial peroneal nerve on the hindlimb did not attenuate the reflex. Intravenous naloxone immediately after termination of magnetic stimulation reversed inhibition of the cardiovascular reflex, suggesting involvement of the opioid system. Also, intrathecal injection of delta- and kappa-opioid receptors antagonists, ICI174,864 (n=7) and nor-binaltorphimine (n=6) immediately after termination of magnetic stimulation reversed inhibition of the cardiovascular reflex. In contrast, the mu-opioid antagonist CTOP (n=7) failed to alter the cardiovascular reflex. The endogenous neurotransmitters for delta- and kappa-opioid receptors, enkephalins and dynorphin but not beta-endorphin, therefore appear to play significant roles in the spinal cord in mediating magnetic stimulation-induced modulation of cardiovascular reflex responses.
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MESH Headings
- Afferent Pathways/physiology
- Animals
- Blood Pressure/physiology
- Cardiovascular Physiological Phenomena
- Cardiovascular System/drug effects
- Cardiovascular System/innervation
- Electroacupuncture
- Enkephalin, Leucine/analogs & derivatives
- Enkephalin, Leucine/pharmacology
- Magnetics
- Male
- Median Nerve/physiology
- Naloxone/pharmacology
- Neurotransmitter Agents/physiology
- Opioid Peptides/physiology
- Rats
- Rats, Sprague-Dawley
- Receptors, Opioid, delta/analysis
- Receptors, Opioid, delta/antagonists & inhibitors
- Receptors, Opioid, delta/physiology
- Receptors, Opioid, kappa/analysis
- Receptors, Opioid, kappa/antagonists & inhibitors
- Receptors, Opioid, kappa/physiology
- Receptors, Opioid, mu/analysis
- Receptors, Opioid, mu/physiology
- Reflex/drug effects
- Reflex/physiology
- Spinal Cord/chemistry
- Spinal Cord/physiology
- Stomach/physiology
- Sympathetic Nervous System/drug effects
- Sympathetic Nervous System/physiology
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Affiliation(s)
- Wei Zhou Yi Syuu
- Department of Medicine, Medical Science 1 C240, College of Medicine, Univ. of California, Irvine, CA 92697-4075, USA.
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Sakuraba T, Shimada Y, Takahashi S, Matsunaga T, Itoi E, Kawatani M. The effect of magnetic stimulation on unloaded soleus muscle of rat: changes in myosin heavy chain mRNA isoforms. Biomed Res 2005; 26:15-9. [PMID: 15806979 DOI: 10.2220/biomedres.26.15] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study assessed the potential application and the effectiveness of functional magnetic stimulation (FMS) for preventing skeletal muscle atrophy in adult rats. FMS using magnetic stimulator was performed to rat soleus muscle by placing a round magnetic coil on the back of 3rd-5th lumbar vertebral level at 20 Hz frequency for 60 min/day up to 10 days. A reverse transcriptase-polymerase chain reaction was applied to evaluate relative amounts of mRNAs specific to four myosin heavy chain (MHC) isoforms [MHCIbeta, MHCIIa, MHCIIb, and MHCIId(x)] in rat soleus muscle during contractile activity by magnetic stimulation. Ten-day unloading by hindlimb suspension induced a drastic decrease of MHCIbeta and MHCIIa mRNA expressions, while MHCIIb and MHCIId(x) mRNA was not decreased. The magnetic stimulation resuscitated the down-regulation of the mRNA levels of MHCIbeta and MHCIIa. These results suggest that magnetic stimulation on acute atrophied muscles is useful for preventing the muscle atrophy.
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Affiliation(s)
- Tsutomu Sakuraba
- Department of Orthopaedic Surgery, Section of Neuro and Locomotor Science, Akita University School of Medicine, Akita 010-8543
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Abstract
OBJECTIVE To investigate the efficacy of the magnetic stimulation of inspiratory muscles as an alternative to mechanical ventilation and functional electric stimulation. DESIGN A prospective before-after trial. SETTING Functional magnetic stimulation laboratory in a Veterans Administration health care system. ANIMALS Six male mongrel dogs, each weighing between 25 and 35 kg. INTERVENTIONS Commercially available magnetic stimulators with a round magnetic coil were used. The center of the magnetic coil was placed posteriorly over the C5-7 vertebrae of the spinal cord transected dogs. Magnetic stimulation parameters were set at 80% intensity, 20 Hz, and a 1.2-second on and 3.8-second off pulse train. MAIN OUTCOME MEASURES The major outcomes were changes in tidal volume (VT), tracheal pressure (Ptr), and arterial partial pressure of carbon dioxide (PaCO2) and oxygen sustained by magnetic stimulation over time. RESULTS The average Vt and Ptr produced during functional magnetic ventilation (FMV) were.47+/-.07 L and -4.7+/-.51 cmH2O, respectively. Blood gas data showed that PaCO2 increased from a baseline of 33 to 75 mmHg, whereas pH decreased from 7.33 to 6.99 at the end of the 1-hour FMV period. CONCLUSIONS FMV was achieved for 2 hours in dogs with C2 spinal cord transection. Additional refinements in magnetic stimulation are needed to improve ventilation in animals.
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Affiliation(s)
- Vernon W Lin
- Functional Magnetic Stimulation Laboratory, Spinal Cord Injury-Disorder Health Care Group, Long Beach VA Healthcare System, CA 90822, USA.
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Reitz A, Knapp PA, Frey S, Schurch B. Functional magnetic stimulation of the spinal cord?a urodynamic study in healthy humans. Neurourol Urodyn 2004; 23:148-53. [PMID: 14983427 DOI: 10.1002/nau.20014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
AIMS To study the effects of functional magnetic stimulation of the spinal cord in healthy subjects on somatic and autonomic pathways innervating the anal and the external urethral sphincter, bladder, bladder neck, and rectum. METHODS Eight healthy male volunteers gave their written informed consent and underwent functional magnetic stimulation of the thoracolumbar and sacral spinal cord. A two-channel microtip pressure transducer catheter was placed rectally measuring the abdominal and anal sphincter pressure. A three-channel microtip pressure transducer catheter was inserted into the urethra measuring the bladder, the bladder neck, and the external urethral sphincter pressure. A comprehensive protocol of single and repetitive magnetic stimulations was performed. Frequency, location, and duration of stimulation were varied while the intensity of stimulation was adapted to the maximum the subjects could tolerate. In four subjects, the degree of bladder filling was changed and the protocol was repeated when the subjects reported a full bladder and desire to void. RESULTS Continuous magnetic stimulation of the thoracolumbar spinal cord and the sacral roots applied with different frequencies (5, 15, 30, 60, 100 Hz) and different duration of stimulation (10, 30, 120 sec) evoked sphincter contraction of both anal and urethral sphincters. The stimulation could not evoke contractions of the bladder, the bladder neck, or the rectum. Also with filled bladder and present desire to void, the magnetic stimulation could not activate autonomic pathways innervating these structures. CONCLUSIONS Considering our results, we suggest that in individuals with preserved sensibility magnetic stimulation of the spinal cord with intensities below the pain threshold is ineffective in activating autonomic nerve fibres innervating bladder, bladder neck, and rectum.
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Affiliation(s)
- Andre Reitz
- Neuro-Urology, Swiss Paraplegic Center, Balgrist University Hospital, Zurich, Switzerland.
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de Assis Gondim F, Lopes AC, Rodrigues CL, da Graca JRV, Rola FH. Gastric emptying and gastrointestinal motility abnormalities after spinal cord injury. Arch Phys Med Rehabil 2002; 83:1479. [PMID: 12370892 DOI: 10.1016/s0003-9993(02)70077-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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