Search Results
Results 251 - 300 of 2373
< 1 2 3 4 5 6 7 8 9 10 11 >
Ghosh Sudip K - - 2008
The mechanical force relationships that distinguish normal from chronic reflux at sphincter opening are poorly understood and difficult to measure in vivo. Our aim was to apply physics-based computer simulations to determine mechanical pathogenesis of gastroesophageal reflux. A mathematical model of the gastroesophageal segment (GES) was developed, incorporating the primary ...
Chen Jie - - 2008
Rectal distension (RD) is known to induce upper gastrointestinal (GI) symptoms. The aim of this study was to investigate the effects and underlying mechanisms of RD on gastric slow waves (GSW) and motor activity and furthermore to investigate the effects and mechanisms of electroacupuncture (EA) on GSW and motor activity. ...
Pandolfino John E - - 2008
Esophageal bolus clearance requires a preferential esophagogastric pressure gradient sustained for a sufficient period. We aimed to validate a high-resolution manometry (HRM) paradigm for predicting bolus clearance. Twenty volunteers and 30 patients were studied with HRM during barium swallows with concurrent fluoroscopy. Simultaneous bolus domain pressure and esophagogastric junction (EGJ) ...
Vega K J - - 2008
BACKGROUND: Oesophageal manometry (OM) is used to diagnose oesophageal motor disorders. Normal values of OM among United States ethnic groups are only available for Hispanic Americans (HA). AIM: To obtain normal values of OM in adult African American (AA) volunteers, compare these with those obtained in HA and non-Hispanic white ...
Kikuchi Yasuharu - - 2008
BACKGROUND: The intraductal ultrasonographic findings of normal bile duct and cholangitis were examined. METHODS: We studied 9 autopsy cases and evaluated the clinical records of 76 patients who had been subjected to papillotomy for bile duct stones removal retrospectively. RESULT: In vitro study: Under a low pressure, the bile duct ...
Sanmiguel Claudia P - - 2008
Gastric electrical stimulation (GES) modulates lower esophageal sphincter pressure (LESP). High-frequency neural stimulation (NES) can induce gut smooth muscle contractions. To determine if lower esophageal sphincter (LES) electrical stimulation (ES) can affect LESP, bipolar electrodes were implanted in the LES of four dogs. Esophageal manometry during sham or ES, was ...
Yehoshua Ronit T - - 2008
BACKGROUND: Aiming to clarify the mechanism of weight loss after the restrictive bariatric procedure of sleeve gastrectomy (LSG), the volumes and pressures of the stomach, of the removed part, and of the remaining sleeve were measured in 20 morbidly obese patients. METHODS: The technique used consisted of occlusion of the ...
Ghosh Sudip K - - 2008
Gastroesophageal reflux is inherently mechanical in nature, driven by the pressure difference between the stomach and the esophagus in the setting of a relaxed or hypotensive sphincter. Recent advances in our understanding of esophagogastric junction (EGJ) biomechanics in the etiology of gastroesophageal reflux disease are highlighted here. We focus this ...
Müller-Stich Beat Peter - - 2008
BACKGROUND: Acute animal models are needed to obtain further insights into the mechanism of gastroesophageal reflux disease. Existing acute models use imprecise methods to detect reflux. The aim of the present study was to evaluate the potential of esophageal multichannel intraluminal impedance measurement (MII) to improve the quality of results ...
Eisenberg Michael L - - 2008
PURPOSE: Ejaculatory duct obstruction is a treatable cause of male infertility but the diagnosis can be difficult to make. Transrectal ultrasound is valuable but not specific for ejaculatory duct obstruction. Adjunctive procedures, such as chromotubation and seminal vesicle aspiration, are more sensitive but not definitive, especially for partial obstruction. We ...
Lee Tae Ho - - 2008
To develop a therapeutic for functional dyspepsia (FD), a prokinetic agent, DA-9701 has been newly formulated with Pharbitis Semen and Corydalis Tuber and we evaluated the gastroprokinetic effects of DA-9701 in comparison with conventional prokinetics. Oral administration with DA-9701 not only significantly accelerated gastric emptying in normal rats but also ...
De Nardi Paola - - 2008
PURPOSE: Stapled hemorrhoidopexy is designed to replace the hemorrhoids into the anal canal by excising the redundant rectal mucosa above the anorectal ring, thus resulting in an intrarectal suture. Few studies have evaluated rectal function after this procedure. This prospective study was designed to use the electronic barostat to assess ...
Witte Ulrike - - 2008
OBJECTIVE: To evaluate the effect of effortful swallow on pharyngeal manometric pressure measurements during saliva and water swallowing. DESIGN: Comparative analysis of pharyngeal pressure generation under 2 bolus and 2 task conditions. SETTING: Swallowing rehabilitation research laboratory. PARTICIPANTS: Healthy participants (N=40), sex equally represented, with a mean age of 25.8 ...
Jeske Hans-Christian - - 2008
To examine the effect of esomeprazole in a fixed time setting on gastric content volume, gastric acidity, gastric barrier pressure, and reflux propensity. Randomized, controlled, double-blind trial. 21 healthy, ASA I physical status volunteers. Esomeprazole was given 12 hours and one hour before investigation. Before the study, a multichannel intraluminal ...
Kawai Takashi - - 2008
We reviewed the recent literature concerning investigations of esophageal peristaltic function. The gold standard for the assessment of esophageal peristaltic function is manometry with pH monitoring. Even with this investigation modality, however, we are in fact doing no more than estimating esophageal peristaltic function from the manometry and pH results. ...
Kahrilas Peter J - - 2008
Two recent advances have revolutionized the performance of clinical esophageal manometry; the introduction of practical high resolution manometry (HRM) systems and the development of sophisticated algorithms to display the expanded manometric dataset as pressure topography plots. We utilized a large clinical experience of 400 consecutive patients and 75 control subjects ...
Rink Andreas D - - 2008
AIM: The impact of 3-dimensional vector manometry (VM) for characterization of the functional outcome of restorative proctocolectomy (RP) was studied in 61 patients at a median of 86 months after RP for ulcerative colitis. METHODS: A 14-day continence diary was utilized to quantify continence, urgency, and the frequency of defecation. ...
Bordeianou Liliana - - 2008
INTRODUCTION: We describe the relationship between anorectal manometry, fecal incontinence severity, and findings at endoanal ultrasound. METHODS: A total of 351 women completed the Fecal Incontinence Severity Index, underwent anorectal manometry, and endoanal ultrasound. Severity index and manometry pressures in 203 women with intact sphincters on ultrasound were compared with ...
Ghosh S K - - 2008
Distinct contraction waves (CWs) exist above and below the transition zone (TZ) between the striated and smooth muscle oesophagus. We hypothesize that bolus transport is impaired in patients with abnormal spatio-temporal coordination and/or contractile pressure in the TZ. Concurrent high resolution manometry and digital fluoroscopy were performed in healthy subjects ...
Karaye Kamilu K - - 2008
In a nationwide survey of Nigeria, residents of Kano were shown to have the highest prevalence of hypertension and the highest levels of plasma cholesterol. Because hypertension and high cholesterol together markedly increase the risk for cardiovascular disease, we examined lipid profiles among hypertensives and nonhypertensives in Kano. To determine ...
Lohsiriwat Supatra - - 2008
PURPOSE: This study was designed to evaluate the effects of caffeine on anorectal function by anorectal manometry. METHODS: Ten healthy subjects were studied. They drank 200 ml of water and later 200 ml of a solution that contained caffeine 3.5 mg/kg body weight. The anorectal manometric study was divided into ...
Kroh M - - 2008
BACKGROUND: The optimal management of Barrett's esophagus, a precursor to esophageal adenocarcinoma, remains controversial. Current therapy includes surveillance and ablative or resection techniques of varying safety and efficacy. This study aimed to determine the feasibility of a new catheter-based, endoscopic water jet ablation technique. METHODS: A high-pressure flexible catheter that ...
Pensabene Licia - - 2008
Patterns of childhood gastroesophageal reflux (GER) have been studied extensively; however, the mechanisms underlying its occurrence in neurologically impaired children (NIC) are poorly understood. Concurrent esophageal manometry and pH monitoring was conducted in 10 un-operated children (7 male; mean age: 59.5 months) with sequelae birth asphyxia and esophagitis. Reflux episodes ...
Agrawal Amit - - 2008
BACKGROUND: Achalasia is defined manometrically by an aperistaltic esophagus. Variations in the manometric findings occur in achalasia suggesting that all manometric features should not be required to diagnose achalasia. Combined multichannel intraluminal impedance and esophageal manometry (MII-EM) allows both a functional and a manometric evaluation of esophageal motility and identifies ...
Kouklakis G - - 2008
There are several studies suggesting the paradoxical simultaneous presence of hypertensive lower oesophageal sphincter and gastroesophageal reflux disease. We present a case of a 22-year-old male patient who was examined in our outpatient clinic with oesophageal food bolus impaction during a meal, severe chest pain and drooling. Manometry revealed a ...
Zhang Xiao-Yong - - 2008
BACKGROUND AND OBJECTIVES: The mechanisms that trigger gallbladder evacuation dysfunction, the key risk factor for gallstone formation, have not yet been fully elucidated. The sphincter of Oddi (SO) plays important roles in the regulation of gallbladder evacuation and maintenance of normal hydraulic pressure of the biliary tract. The aim of ...
Dolan James P - - 2008
BACKGROUND: We sought to investigate the efficacy of endoscopically created, full-thickness plications on the competency of the anti-reflux barrier when placed at different positions on the stomach adjacent to the gastroesophageal junction. METHODS: Explanted human cadaver stomachs and esophagi were used. An endoscopic plication system (Plicator, NDO Surgical, Mansfield, Massachusetts) ...
Young Richard L - - 2008
Metabotropic glutamate receptors (mGluR) are classified into groups I (excitatory), II and III (inhibitory) mGluR. Activation of peripheral group III mGluR (mGluR4, mGluR6, mGluR7, mGluR8), particularly mGluR8, inhibits vagal afferent mechanosensitivity in vitro which translates into reduced triggering of transient lower oesophageal sphincter relaxations and gastroesophageal reflux in vivo. However, ...
Lacy Brian E - - 2008
PURPOSE: Albuterol reduces lower esophageal sphincter (LES) pressure in normal volunteers, although the effects of albuterol on esophageal function in asthmatic patients are not known. The aim of this study was to evaluate the effects of nebulized albuterol on lower esophageal function in asthmatic patients. Symptoms and a methacholine challenge ...
Gumbley Freya - - 2008
This cross-sectional study investigated the effect of bolus volume on contact pressure within the pharynx and upper esophageal sphincter (UES). Three solid-state manometric pressure sensors were placed transnasally into the pharynx and the proximal esophagus of 40 participants (gender equally represented and between the ages of 20 and 45 years). ...
Ganz Robert A - - 2008
BACKGROUND: The success of fundoplication surgery varies widely; furthermore, complications after fundoplication can be common. We introduced a new device to treat GERD: biomechanical augmentation of the lower esophageal sphincter (LES) by use of a magnetic reinforcing appliance. OBJECTIVES: The aim was to determine whether a magnetic appliance could safely ...
Perera Lilani - - 2008
The mechanism against entry of gastric content into the pharynx during high-intensity vocalization such as seen among professional singers is not known. We hypothesized that phonation-induced upper esophageal sphincter (UES) contraction enhances the pressure barrier against entry of gastroesophageal contents into pharynx. To determine and compare the effect of phonation ...
Ang D - - 2009
Ghrelin increases gastric tone in the fasting state and enhances gastric emptying in gastroparesis. The aims of the study were to evaluate the effect of ghrelin on postprandial gastric tone and on meal-induced satiety in health. Ten healthy volunteers underwent a barostat study on two occasions. After determination of intra-abdominal ...
Bortolotti Mauro - - 2008
BACKGROUND AND AIMS: In this research we propose an original magnetic device to strengthen the hypo-atonic anal sphincter and prevent fecal incontinence. METHODS: The device consists in a couple of small magnetic plaques to be surgically inserted in the wall of the anal canal between the external and internal anal ...
Bai Ming-Dong - - 2008
AIM: To assess the patency of pancreaticoenterostomy and pancreatic exocrine function after three surgical methods. METHODS: A pig model of pancreatic ductal dilation was made by ligating the main pancreatic duct. After 4 wk ligation, a total of 36 piglets were divided randomly into four groups. The piglets in the ...
Dinning P G - - 2008
Abnormal colonic motor patterns have been implicated in the pathogenesis of severe constipation. Yet in health, the mechanical link between movement of colonic content and regional pressures have only been partially defined. This is largely due to current methodological limitations. Utilizing a combination of simultaneous colonic manometry, high-resolution scintigraphy and ...
Mehl Josimeire Batista - - 2008
Anal incontinence causes psychological, social and adaptive troubles prejudicial to the quality of life both in children and adults. Therefore, the detailed knowledge of its causes and the improvement of diagnostic and therapeutic methods increase the possibilities of a more adequate social life to patients with congenital anomalies or sphincteric ...
Mehl J B - - 2008
There seems to be controversy on the anorectal sphincter presentation and anatomical division, as well as on its functional representation. Evaluation of the anorectal sphincter musculature has been achieved through several methods, including anorectal manometry and computerized tomography, but to date there is no experimental model allowing a detailed manometric ...
Henry Maria Aparecida Coelho de Arruda - - 2008
The ingestion of caustic substances is an important emergency situation, because of its serious consequences. PURPOSE: To study morphological and functional alterations of the esophagus in rabbits submitted to esophageal infusion of caustic soda (NaOH). METHODS: The 88 rabbits studied were divided into 4 groups: G1 (n=22) were submitted to ...
Marcovechio Fonseca C A - - 2008
There is controversy in the literature regarding the motor function behavior of the lower esophageal sphincter and esophagus following partial gastrectomy. We studied 26 patients with gastric adenocarcinoma of the distal corpus and/or antrum who underwent radical subtotal gastrectomy with Roux-en-Y reconstruction. There were 15 women (57.69%) and 11 men ...
Blonski Wojciech - - 2008
OBJECTIVE: Esophageal function testing with combined multichannel intraluminal impedance and manometry (MII-EM) is performed using ten 5-ml liquid and viscous swallows. Diagnosis of bolus transit abnormalities identified by impedance is based on both liquid and viscous swallows. Manometric diagnosis is based solely on liquid swallows. The aim of this study ...
Kawamoto Masahiko - - 2008
BACKGROUND/PURPOSE: Perfused multilumen sphincter of Oddi (SO) manometry is accepted as the gold standard for diagnosis of SO dysfunction. However, this technique is associated with a relatively high incidence of post-procedure acute pancreatitis. In addition, triple-lumen manometry recordings may be difficult to interpret, as movement may produce artifacts. We have ...
Murray Liam J - - 2008
BACKGROUND: In a cross-sectional community based study, as part of a randomised controlled trial of eradication of Helicobacter pylori infection, the association between blood pressure and symptoms of gastro-oesophageal reflux was examined. METHODS: Linear regression was used to examine the association between systolic and diastolic blood pressure and the frequency ...
Shuai X - - 2008
We aim to investigate the effects of different electroacupuncture (EA) frequencies at ST-36 on esophageal motility, and to compare the effect of EA on serum gastrin (GAS), motilin (MTL), and vasoactive intestinal peptide (VIP). Thirty-two cats were divided into four equal groups. All animals underwent a Heller myotomy. After esophagitis ...
Nii Akira - - 2008
BACKGROUND/PURPOSE: The efficacies of vessel sealing system (VSS) devices for major Glisson bundles and major bile ducts have not yet been determined. METHODS: Male pigs (n = 6) and a LigaSure V device and an Atlas 20 (Valleylab, Boulder, CO, USA) device were used in this study. After laparotomy, the ...
Spaziani R - - 2008
Autonomic nervous system dysfunction has been implicated in the pathophysiology of irritable bowel syndrome (IBS). This study characterized the autonomic response to rectal distension in IBS using baroreceptor sensitivity (BRS), a measure of autonomic function. Rectal bag pressure, discomfort, pain, ECG, blood pressure and BRS were continuously measured before, during ...
Choung R S - - 2008
BACKGROUND: DDP733, a selective partial 5HT(3) receptor agonist, increases lower oesophageal sphincter pressure in experimental animal models. However, its effect on gastro-oesophageal reflux or lower oesophageal sphincter pressure in humans remains unknown. AIM: To evaluate the effect of DDP733 on reflux episodes in healthy volunteers receiving a refluxogenic meal. METHODS: ...
Chapman M J - - 2008
The motor dysfunctions underlying delayed gastric emptying (GE) in critical illness are poorly defined. Our aim was to characterize the relationship between antro-duodenal (AD) motility and GE in critically ill patients. AD pressures were recorded in 15 mechanically ventilated patients and 10 healthy volunteers for 2 h (i) during fasting, ...
Takeuchi Shuhei - - 2007
A micro optic pharyngeal manometric sensor for deglutition analysis was constructed. The optical manometric sensor was composed of a fluid-sensitive and air-sensitive fiber-optic pressure sensor (extrinsic Fabry-Perot interferometric type) and a lateral pressure-sensitive attachment. The manometric sensor was circumferential type, and had a very small diameter (distal: 2.08 mm, mesial: ...
Cantù P - - 2008
Few data exist on the effect of upper gut stimuli on the cardiovascular system. Aim of our study was to evaluate the cardiovascular effects of gastric intubation and distension. Eleven healthy subjects (eight men, aged 21-30 years) were studied and a non-invasive beat-to-beat cardiovascular monitoring system was used. After 15-min ...
< 1 2 3 4 5 6 7 8 9 10 11 >