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Gastric electrical stimulation

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https://www.readbyqxmd.com/read/28725999/surgical-anti-reflux-options-beyond-fundoplication
#1
REVIEW
Dan Azagury, John Morton
PURPOSE OF REVIEW: This paper provides an overview of current and future surgical interventions available for the management of gastroesophageal reflux disease (GERD) beyond the well established and recognized fundoplication. Review the current indications and outcomes of these surgical procedures. RECENT FINDINGS: Fundoplication has been a cornerstone of the surgical management of GERD. However, other effective surgical options exist and can be considered based on prior interventions as well as patient, anatomical or other factors...
July 2017: Current Gastroenterology Reports
https://www.readbyqxmd.com/read/28715324/electrical-impedance-tomography-tissue-properties-to-image-measures
#2
Andy Adler, Alistair Boyle
Electrical Impedance Tomography (EIT) uses electrical stimulation and measurement at the body surface to image the electrical properties of internal tissues. It has the advantage of non-invasiveness and high temporal resolution but suffers from poor spatial resolution and sensitivity to electrode movement and contact quality. EIT can be useful to applications where there are conductive contrasts between tissues, fluids or gasses, such as imaging of cancerous or ischemic tissue or functional monitoring of breathing, blood flow, gastric motility and neural activity...
July 17, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28684460/abdominal-surgery-induced-gastric-ileus-and-activation-of-m1-like-macrophages-in-the-gastric-myenteric-plexus-prevention-by-central-vagal-activation-in-rats
#3
Pu-Qing Yuan, Yvette Taché
Inflammation plays a role in abdominal surgery (AS)-induced intestinal ileus that is alleviated by electrical vagal stimulation. The stable thyrotropin-releasing hormone agonist, RX77368 injected intracisternally (ic) activates dorsal motor nucleus neurons and gastric vagal efferent discharges. We investigated the gastric inflammation induced by AS and the modulation by ic RX-77368 in rats. RX77368 (50 ng/rat) or saline was injected ic followed, 1 h later, by laparotomy and small intestinal/cecal manipulation...
July 6, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28627584/gastric-electrical-stimulation-improves-enteric-neuronal-survival
#4
Nian Wang, Kun Li, Shuangning Song, Jie Chen
Research and clinical experience with vagotomy have confirmed that damage to the central nervous system severely affects physiological movement in the gastrointestinal system. The aim of this study was to investigate the effects of synchronized dual-pulse gastric electrical stimulation (SGES) on the apoptosis of enteric neurons and the possible pathways involved in these effects in vagotomized rats. For this purpose, Male Sprague-Dawley (SD) rats were randomized into a control group, an early subdiaphragmatic vagotomized group (ESDV group), an early subdiaphragmatic vagotomized group with short-term SGES (ESDV + SSGES group), a terminal subdiaphragmatic vagotomized group (TSDV group) and a terminal subdiaphragmatic vagotomized group with long-term SGES (TSDV + LSGES group)...
June 14, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28585346/ablation-of-tacr2-in-mice-leads-to-gastric-emptying-disturbance
#5
Y-L Mao, C-L Shen, T Zhou, B-T Ma, L-Y Tang, W-T Wu, H-X Zhang, H-L Lu, W-X Xu, Z-G Wang
BACKGROUND: Tacr2 is one of the G protein-coupled receptors(GPCRs) that mediate the biological actions of tachykinins. It is abundantly expressed in the gastrointestinal (GI) system and is thought to play an important role in GI motility, secretion, and visceral sensitivity. Previously, the physiological and pathophysiological functions of Tacr2 were mainly studied using Tacr2 selective agonists or antagonists. Here, we seek to investigate the effect of Tacr2 disruption in mice to provide further insights...
June 6, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28577248/pathological-findings-of-the-antral-and-pyloric-smooth-muscle-in-patients-with-gastroparesis-like-syndrome-compared-to-gastroparesis-similarities-and-differences
#6
Mohammad Bashashati, Sharareh Moraveji, Alireza Torabi, Irene Sarosiek, Brian R Davis, Jesus Diaz, Richard W McCallum
BACKGROUND: Gastroparesis (GP)-like syndrome presents with the symptoms of GP but without delayed gastric emptying (GE). Whether GP-like syndrome is part of a spectrum of GP is not clear. This study aimed to compare the histopathological features of antral and pyloric smooth muscle tissue in GP and GP-like syndrome. METHODS: Full-thickness antral and/or pyloric biopsies were obtained from 37 GP and 18 GP-like syndrome patients who underwent abdominal surgery to place a gastric electrical stimulator or jejunal feeding tube and/or pyloroplasty...
June 2, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28547565/an-optimized-ies-method-and-its-inhibitory-effects-and-mechanisms-on-food-intake-and-body-weight-in-diet-induced-obese-rats-ies-for-obesity
#7
Xinyue Wan, Jieyun Yin, Robert Foreman, Jiande D Z Chen
PURPOSE: This paper aims to optimize stimulation parameters and durations for intestinal electrical stimulation (IES) and to explore the effects and mechanisms of chronic IES with optimized methodology in obesity rats. MATERIALS AND METHODS: Sixteen diet-induced obese (DIO) rats were tested for food intake with four different sets of IES parameters each lasting 1 week. Then, another 12 DIO rats were used to test the effect of IES on food intake with different stimulation durations...
May 25, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28535580/gastroparesis-updates-on-pathogenesis-and-management
#8
REVIEW
Nanlong Liu, Thomas Abell
Gastroparesis (Gp) is a chronic disease that presents with clinical symptoms of early satiety, bloating, nausea, vomiting, and abdominal pain. Along with these symptoms, an objective finding of delayed gastric emptying, along with a documented absence of gastric outlet obstruction, are required for diagnosis. This article focuses on updates in the pathogenesis and management of Gp. Recent studies on full thickness biopsies of Gp patients have shed light on the complex interactions of the central, autonomic, and enteric nervous systems, which all play key roles in maintaining normal gut motility...
May 25, 2017: Gut and Liver
https://www.readbyqxmd.com/read/28487439/roux-en-y-gastric-bypass-surgery-enhances-contraction-mediated-glucose-metabolism-in-primary-human-myotubes
#9
J Matthew Hinkley, Kai Zou, Sanghee Park, Kristen Turner, Donghai Zheng, Joseph A Houmard
Contractile activity (e.g. exercise) evokes numerous metabolic adaptations in human skeletal muscle including enhanced insulin action and substrate oxidation. However, there is inter-subject variation in the physiological responses to exercise, which may be linked with factors such as the degree of obesity. Roux-en-Y gastric bypass (RYGB) surgery reduces body mass in severely obese (BMI > 40 kg/m(2)) individuals; however, it is uncertain whether RYGB can potentiate responses to contractile activity in this potentially exercise-resistant population...
May 9, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28440477/synchronized-dual-pulse-gastric-electrical-stimulation-improves-gastric-emptying-and-activates-enteric-glial-cells-via-upregulation-of-gfap-and-s100b-with-different-courses-of-subdiaphragmatic-vagotomy-in-rats
#10
Nian Wang, Shuangning Song, Jie Chen
Previous research and clinical practice have indicated that damage to the vagal nerve may seriously affect gastrointestinal physiological movement behavior. The aim of the current study was to observe the change of gastric motility, as well as enteric glial cells (EGCs) in the stomach with different courses of vagal nerve transection in rats prior to and following synchronized dual pulse gastric electrical stimulation. The gastric emptying rates were measured to assess the gastric motility. The glial markers, containing calcium binding protein (S100B) and glial fibrillary acidic protein (GFAP), were detected by reverse transcription‑quantitative polymerase chain reaction and double‑labeling immunofluorescence analysis...
June 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28437585/chronic-intestinal-electrical-stimulation-improves-glucose-intolerance-and-insulin-resistance-in-diet-induced-obesity-rats
#11
Shiying Li, Weijian Zhu, Sujuan Zhang, Jiande D Z Chen
OBJECTIVE: Obesity is a contributing factor to insulin resistance and type 2 diabetes. The aim of this study was to study the therapeutic potential of intestinal electrical stimulation (IES) for obesity and associated glucose intolerance and insulin resistance in diet-induced obesity (DIO) rats. METHODS: DIO rats were divided into two groups to receive sham or IES for 8 weeks. Oral glucose tolerance and insulin tolerance tests were performed. Gastric emptying and small bowel transit tests were performed...
June 2017: Obesity
https://www.readbyqxmd.com/read/28374487/gastric-neuromuscular-histology-in-patients-with-refractory-gastroparesis-relationships-to-etiology-gastric-emptying-and-response-to-gastric-electric-stimulation
#12
J Heckert, R M Thomas, H P Parkman
BACKGROUND: The aims of this study were to describe the histology in gastroparesis, specifically to relate histopathology to etiology of gastroparesis (idiopathic and diabetic gastroparesis), gastric emptying, and clinical response to gastric electric stimulation. METHODS: Full thickness gastric body sections obtained during insertion of gastric stimulator in gastroparetics were stained with Hematoxylin & Eosin, Masson Trichrome and immunohistochemical stains for Neuron-Specific Enolase and c-Kit...
April 4, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28317837/inhibitory-responses-mediated-by-vagal-nerve-stimulation-are-diminished-in-stomachs-of-mice-with-reduced-intramuscular-interstitial-cells-of-cajal
#13
Elizabeth A H Beckett, Kenton M Sanders, Sean M Ward
Intramuscular interstitial cells of Cajal (ICC-IM) are closely associated with enteric motor nerve terminals and electrically coupled to smooth muscle cells within the gastric musculature. Previous studies investigating the role of ICC-IM in motor neurotransmission have used indiscriminate electric field stimulation of neural elements within the gastric wall. To determine the role of ICC-IM in transduction of vagally-mediated motor input to gastric muscles electrical and mechanical responses to selective electrical vagal stimulation (EVS) were recorded from gastric fundus and antral regions of wild type and W/W(V) mice, which lack most ICC-IM...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28294385/potential-excitatory-role-of-nitric-oxide-on-2-deoxy-d-glucose-induced-gastric-motility-in-rats
#14
A M Sevgili, Z D Balkanci, A Erdem
Previous studies have shown that 2-deoxy-d-glucose (2-DG) increases gastric motility via the vagus nerve, but the underlying mechanism remains elusive. Since nitric oxide (NO) is involved in gastric motility, a possible interplay between 2-DG and NO can be suggested. In the present study, Wistar rats (250-350 g) of both sexes were intravenously injected with 2-DG (200 mg·kg(-1) ), and the effects of the intravenous injection of the nitric oxide synthase (NOS) inhibitors; nitro-l-arginine methyl ester (l-NAME, 10 mg·kg(-1) ) and N(ω) -nitro-l-arginine (l-NNA, 10 mg·kg(-1) ) were investigated...
March 13, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28269449/implantable-gastric-electric-stimulator-with-automatic-daily-activity-compliance-reporting
#15
RANDOMIZED CONTROLLED TRIAL
Eri Takami, Javier J Sanchez, Rose Province, Antonio J Torres
In order for any obesity therapy to be successful real behavior change by the individual is required. We present an implantable obesity therapy that combines gastric electrical stimulation for satiety with onboard sensors that provide self-monitoring for the patient and compliance reporting to the clinician. An algorithm for processing data from the onboard three axis accelerometer for use in physical activity monitoring was developed and validated. Four obese patients participated in a study where self-reported sleep and exercise was compared with the events detected by the implanted system, and two commercially available, wearable activity monitors...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227695/implantable-gastric-electric-stimulator-with-automatic-daily-activity-compliance-reporting
#16
Eri Takami, Javier J Sanchez, Rose Province, Antonio J Torres, Eri Takami, Javier J Sanchez, Rose Province, Antonio J Torres, Eri Takami, Javier J Sanchez, Antonio J Torres, Rose Province
In order for any obesity therapy to be successful real behavior change by the individual is required. We present an implantable obesity therapy that combines gastric electrical stimulation for satiety with onboard sensors that provide self-monitoring for the patient and compliance reporting to the clinician. An algorithm for processing data from the onboard three axis accelerometer for use in physical activity monitoring was developed and validated. Four obese patients participated in a study where self-reported sleep and exercise was compared with the events detected by the implanted system, and two commercially available, wearable activity monitors...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28213202/determinants-of-cough-effectiveness-in-patients-with-respiratory-muscle-weakness
#17
Franco Laghi, Veeranna Maddipati, Timothy Schnell, W Edwin Langbein, Martin J Tobin
Experiments were undertaken to mechanistically define expiratory-muscle contribution to effectiveness of cough while controlling glottic movement. We hypothesized that electrical abdominal-muscle stimulation in patients with respiratory-muscle weakness produces effective coughs only when glottic closure accompanies coughs. In ten spinal-cord-injury patients, esophago-gastric pressure and airflow were recorded during solicited-coughs, coughs augmented by abdominal-muscle stimulation, and passive open-glottis exhalations...
June 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28164463/impact-of-the-feedback-provided-by-a-gastric-electrical-stimulation-system-on-eating-behavior-and-physical-activity-levels
#18
RANDOMIZED CONTROLLED TRIAL
Luca Busetto, Antonio J Torres, Salvador Morales-Conde, Isaias Alarcón Del Agua, Carlo Moretto, Paola Fierabracci, Giuseppe Rovera, Gianni Segato, Miguel A Rubio, Franco Favretti
OBJECTIVE: The closed-loop gastric electrical stimulation (CLGES) abiliti(®) system provides tailored gastric electrical stimulation activated by food entry into the stomach and sensor-based data to medical professionals. The aim of this study was to analyze behavior changes using sensor-based food intake and activity data in participants treated with the CLGES system. METHODS: Food intake and activity data (3D accelerometer) were downloaded at baseline and monthly/bimonthly for 12 months in a subset of patients with obesity (N = 45) participating in a multicenter trial with CLGES...
March 2017: Obesity
https://www.readbyqxmd.com/read/28163260/central-and-peripheral-effects-of-transcutaneous-acupuncture-treatment-for-nausea-in-patients-with-diabetic-gastroparesis
#19
Irene Sarosiek, Gengqing Song, Yan Sun, Hugo Sandoval, Stephen Sands, Jiande Chen, Richard W McCallum
Background/Aims: Nausea, an unpleasant symptom of diabetic gastroparesis (DMGP), has been reported to be alleviated by needleless transcutaneous electrical acupuncture (TEA). Our study was designed to utilize electroencephalography (EEG) and electrogastrography (EGG) recordings to investigate the central and peripheral responses of TEA in the treatment of nausea in DMGP patients. Methods: Eleven DMGP subjects underwent simultaneous EEG and EGG testing while grading the severity of nausea following 30-minute intervals of: (1) baseline, (2) visual stimulation (VS) to provoke more nausea, (3) active VS together with TEA, and (4) TEA alone, and a final 15-minute recording without any intervention...
April 30, 2017: Journal of Neurogastroenterology and Motility
https://www.readbyqxmd.com/read/28147471/recent-trends-in-endoscopic-bariatric-therapies
#20
REVIEW
Hyuk Soon Choi, Hoon Jai Chun
Obesity and its associated metabolic diseases including diabetes mellitus are severe medical problems that are increasing in prevalence worldwide and result in significant healthcare expenses. While behavioral and pharmacological treatment approaches are partly effective in the short term, their effects are not long-lasting. Although previous studies have described bariatric surgery as the most effective treatment for obesity, it is associated with morbidity, mortality, and economic burden. Endoluminal interventions performed entirely using gastrointestinal flexible endoscopy offer alternative approaches to the treatment of obesity that are safer and more cost-effective than current surgical approaches...
January 2017: Clinical Endoscopy
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