Search Results
Results 301 - 350 of 1090
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Yamamoto Y - - 1996
Endoscopical measurement of gastric mucosal blood flow seems to provide substantial advantages for noninvasive and repetitive scrutiny, especially in small animals. We employed a quartz probe 0.5 mm in diameter which was inserted into the gastric lumen through the forceps channel (0.8 mm in diameter) of the endoscope. Gastric mucosal ...
Kleen M M Institute for Surgical Research, University of Munich, - - 1996
Acute normovolemic hemodilution (ANH) has been shown to be a cost-effective method of reducing allogenic blood transfusion during elective surgery. ANH has been implicated with impaired oxygenation in isolated canine gastric flaps. The present study was designed to investigate the effects of ANH on gastric mucosal oxygenation using a model ...
Tang G - - 1996
The effect of gastric acidity on the blood response to a single dose of 120 mg beta-carotene in humans was investigated in 12 normal subjects (5 women, 7 men) aged 23-68 y. Omeprazole was used for 7 d to obliterate gastric acid secretion and to raise gastric pH to > ...
Magee D F - - 1996
Inconsistencies and omissions in current explanations for the well known depressions of gastric acid secretion and blood gastrin levels following acidification by antral stimulants are discussed. Evidence is presented which favors a reciprocal sensitivity relationship between the fundic mucosa and the antral G cells, such that blood gastrin levels rise ...
Kurihara T - - 1996
The major objective of the present study was to evaluate mechanisms by which teprenone, a gastric mucosal protecting agent, increases hepatic mucosal blood flow using male Sprague-Dawley rats. Hepatic and gastric blood flow was measured using a laser blood flow meter after administration of teprenone, dissolved in Tween 80, into ...
Akiyama S - - 1996
BACKGROUND: We developed a novel treatment of preoperative embolization therapy in an attempt to prevent anastomotic leakage after esophageal resection. We report the results of this new treatment. METHODS: Preoperative embolization therapy (PET) was performed in 24 cases of esophageal carcinoma. The femoral artery was punctured, and celiac angiography was ...
Lincoln G A - - 1996
Testosterone concentrations were measured in blood samples collected weekly over a 5 year period from six adult (19-40 year old) male Asian elephants (Elephas maximus maximus) living in captivity in Sri Lanka (7 degrees N), to investigate the relationship between androgen secretion and the occurrence of musth (temporal gland secretion, ...
Tanaka S - - 1996
BACKGROUND: Antisecretory and bismuth compounds protect the gastric mucosa from injury resulting from non-steroidal anti-inflammatory drugs. AIM: To study the mechanism underlying the gastroprotective effects of ranitidine bismuth citrate (GG311) in rats. METHODS: Indomethacin rat injury model and in vivo microscopy in which acid output, surface cell intracellular pH (pHi), ...
Lipscomb G R - - 1996
Our objective was to determine whether H. pylori influences gastric mucosal injury and adaptation caused by naproxen. Twenty-four healthy volunteers, 12 H. pylori-positive and 12 H. pylori-negative, were given a 28-day course of naproxen 500 mg twice a day. They were each gastroscoped to assess gastric mucosal damage and mucosal ...
Satoyoshi K - - 1996
We investigated hemodynamics in the colonic mucosa of rats with experimental colitis induced by the administration of dextran sulfate sodium (DSS). As parameters of hemodynamics, we determined the indices of mucosal hemoglobin concentration (IHb) and mucosal oxygen saturation (ISO2), measured by reflectance spectrophotometry, and an index of colonic mucosal blood ...
Gislason H - - 1996
This study was performed to examine if the cytokines interleukin-1 (IL-1), interleukin-6 (IL-6) or tumor necrosis factor (TNF) are released from the gastric mucosa during acute mucosal damage, and if the generation of these cytokines is affected by indomethacin. Cat stomachs were exposed to 2 M NaCl for 10 min ...
Abdel Salam O M - - 1996
The effect of capsaicin and resiniferatoxin on gastrointestinal blood flow was studied in anaesthetized rats by laser Doppler flowmetry. Resiniferatoxin injected into the jugular vein (0.08-1.6 nmol/kg) produced a marked and dose-dependent increase in gastric blood flow, while the effect of capsaicin (0.33-19.6 nmol/kg) was transient, variable and accompanied by ...
Hathaway DH - - 1996
Doppler velocity observations obtained by the Global Oscillation Network Group (GONG) instruments directly measure the nearly steady flows in the solar photosphere. The sun's differential rotation is accurately determined from single observations. The rotation profile with respect to latitude agrees well with previous measures, but it also shows a slight ...
Runer T - - 1996
The three endothlins 1, 2 and 3 (ET-1, ET-2 and ET-3) are 21-amino-acid peptides which in a previous study in the rabbit have been shown to increase both mucociliary activity in the maxillary sinus in vivo and ciliary beat frequency (CBF) in sinus and tracheal samples in vitro. We have ...
Perez J F - - 1996
The present study compares estimates of rumen microbial-N production derived from duodenal flow measurements (15N and purine bases) with those from measurements of the urinary excretion of purine derivatives. Four Rasa Aragonesa ewes fitted with simple cannulas in the rumen and proximal duodenum were used. Four diets consisting of 550 ...
Vacca G - - 1996
The present study was undertaken in anaesthetized pigs to determine the primary reflex effects of gastric distension on the peripheral circulation. Changes in blood flow in the splenic, superior mesenteric, left renal and left external iliac arteries were assessed using electromagnetic flowmeters during distension of a balloon in the stomach, ...
Suzuki S - - 1996
BACKGROUND: The cytoskeletal system is believed to play an important role in normal bile formation. The effects of wortmannin, a new myosin light-chain kinase inhibitor, on bile canalicular contraction and bile flow have been observed. METHODS: The bile canalicular contraction of cultured hepatocyte doublets was investigated, using an image analyzer ...
Schilling M K - - 1996
Poor perfusion of the gastric substitute in esophageal replacement frequently causes anastomotic break down. In this in vivo study we assessed gastric microperfusion before, during, and after gastric tube formation by means of laser Doppler flowmetry in 11 patients undergoing esophagectomy for esophageal cancer. Baseline blood flux along the greater ...
Solomon H - - 1996
Bile flow rates and composition are subject to a wide variety of neural, endocrine and paracrine influences. The effects of these multiple factors may be different in the diseased liver compared to the response produced in the normal liver. As prostanoids may have a therapeutic role in liver disease it ...
Lipscomb G R - - 1996
INTRODUCTION: Oral nonsteroidal anti-inflammatory drugs (NSAIDs) cause acute gastric mucosal injury but the relative importance of systemic and topical effect of NSAIDs to overall gastric damage remains uncertain. METHODS: Twenty-four healthy volunteers were allocated either oral or rectal naproxen 500 mg b.d. and gastroscoped before and during days 1, 7 ...
Hachiya A - - 1996
BACKGROUND: The effects of teprenone (6,10,14,18-tetramethyl-5,9,13, 17-nonadecatetraen-2-one) on changes in gastric mucosal blood flow, adenosine triphosphate (ATP) content, and incidence of histologic lesions were evaluated in rat gastric mucosa after hemorrhage and retransfusion. METHODS: Teprenone (100 mg/kg) was administered orally once a day for 3 consecutive days. On the 3rd ...
Goldin E - - 1996
The aim of the study was to characterize the gastric and mesenteric vascular changes induced by diabetes and the implication of endothelial [nitric oxide (NO) and prostaglandins] and humoral (glucagon) factors in such changes. Diabetes was induced in rats by a single streptozotocin injection. Four weeks later, gastric mucosa, left ...
Parviainen I - - 1996
OBJECTIVE: To study the effect of nasogastric suction and ranitidine on the determination of gastric intramucosal pH (pHi). DESIGN: Prospective study. SETTING: Clinical research unit at a university hospital intensive care department. SUBJECTS: 12 healthy volunteers. INTERVENTIONS: After a 2-h measurement control period a tonometer was connected to nasogastric suction ...
Fukumura D - - 1996
The aim of the present study was to clarify the involvement of endogenous endothelin in the pathogenesis of gastric mucosal damage. The rat stomach was exposed and repeated electrical stimulation (RES) was applied to the small arterial wall close to the lesser curvature. Significant mucosal haemorrhagic lesions (ulcer and erosion) ...
Obafunwa J O - - 1996
A 29-year-old asthmatic with a family history of atopy inhaled a large dose of fumes from sizzling, steaming seafood being served to another client in a restaurant. She immediately developed respiratory distress, loss of consciousness and cyanosis; she also vomited profusely, aspirated and died with 58 min of the onset ...
Buchler M W - - 1996
BACKGROUND: A new method of gastroplasty for the intrathoracic esophagus is described that requires resection of a small part of the gastric corpus only. All tributaries of the arterial arcade along the lesser curvature are preserved. RESULTS: The resulting gastric tube has three advantages over conventional techniques: an increase in ...
Logan B K - - 1996
A subject who apparently swallowed a baggie containing "crank" (methamphetamine) while being arrested, was admitted to hospital and then experienced a massive overdose of the drug. The subject went through a seizure with associated fixed dilated pupils, and a depressed pulse and blood pressure. His cardiac and respiratory problems could ...
Pounder D J - - 1996
Postmortem drug diffusion from gastric residue was assessed in a human cadaver model. Fifty milligrams of amitriptyline (Ami) and 5 g of paracetamol (Par) suspended in 350 ml of 10% methanol, 0.1 N HCl, and 50 ml urograffin with 5 g lithium carbonate (alkaline model) or without lithium (acidic model) ...
Matsumura J - - 1996
We previously reported that dogs with pigment gallstones infused with taurocholate produce higher bile flow than normal dogs due to an increase in bile-acid independent bile flow. Since dogs with pigment gallstones are taurine-depleted and secrete large amounts of unconjugated bile salt, we hypothesized that the observed increased bile flow ...
Tachi K - - 1996
BACKGROUND: Gastric mucosal microcirculation is an important factor in the protection of gastric mucosa, and nitric oxide (NO) plays a crucial role in the regulation of regional blood flow. This study was designed to evaluate the effect of cetraxate, an anti-ulcer drug, on water immersion stress-induced gastric lesions in relation ...
Gurr P - - 1996
Laser-Doppler blood flowmetry was used to measure the mucosal blood flow of the inferior turbinate before and after injection of the greater palatine canal with 2 ml of a 0.5 per cent bupivicaine hydrochloride solution. Injection of the greater palatine canal is a useful technique in the control of posterior ...
Jacques T - - 1996
We aimed to evaluate the tonometer in the assessment of gastrointestinal ischaemia induced by an infrarenal aortic cross-clamp. Nine anaesthetized pigs were cannulated for haemodynamic monitoring and radionuclide labelled microsphere (RLM) injection. Gastric and sigmoid tonometers were positioned. After haemodynamic stabilization an infrarenal aortic cross-clamp was applied. Animals were sacrificed ...
Gislason H - - 1996
BACKGROUND: This study was undertaken to examine the role of adenosine and nitric oxide (NO) in the hyperemic response to H+ back-diffusion into superficially or deeply injured gastric mucosa, and the role of adenosine in mucosa when blood flow was reduced with indomethacin. METHODS: Cat stomachs were exposed to 2 ...
Welte M - - 1996
Although impairment of splanchnic perfusion may induce mucosal hypoxia and endotoxaemia during orthotopic liver transplantation (OLT), little is known about the changes in mucosal oxygenation during and after the procedure. To study the effects of liver surgery itself on mucosal pH (pHi) and the response of pHi to acute changes ...
Uusaro A - - 1996
OBJECTIVE: To evaluate the adequacy of visceral oxygen transport and gastric pHi after open heart surgery in patients with stable hemodynamics. DESIGN: Nonrandomized control trial. SETTING: A general intensive care unit in a tertiary care center. PATIENTS: Sixteen postoperative cardiac surgery patients were studied after stabilization of systemic hemodynamics. INTERVENTIONS: ...
Gompertz R H - - 1996
BACKGROUND: Changes in gastroduodenal blood flow have been implicated in the pathogenesis of duodenal ulcer. We have studied duodenal blood flow during the development of an acute to chronic duodenal ulcer by using the abscopal model, in which ulcers are generated as an indirect effect of lower mediastinal irradiation. METHODS: ...
Lee M - - 1996
The present study was designed to examine the influence of aging on the gastric blood flow, a major mucosal protective mechanism against experimental gastric mucosal injury, basally and after treatment with acid, a known stimulant of gastric blood flow. Our data demonstrated that aging was associated with a significant decline ...
Scuri M - - 1996
The reported effects of cholinergic agonists on bronchial blood flow (Qbr) have been inconsistent. The aim of the present study was to determine whether the inconsistency could be due to the mode of agonist administration (systemic vs. aerosol) or the anatomic site of blood flow in the bronchus (mucosal vs. ...
Tabasco-Minguillán J - - 1995
During acute rejection (AR), the endothelial targeting seen in the mucosal vessels of the intestinal allograft (IA) could impair the blood supply and response to luminal stimuli. To study the effect of AR in the perfusion and reactivity of the IA mucosa, we measured the mucosal blood flow in the ...
Chow L - - 1995
This study tested the hypothesis that angiotensin II acting through the angiotensin AT1 receptor plays an important role in the control of gastric acid secretion. Basal gastric acid secretion and gastric blood flow were lower in Na(+)-depleted animals, in which the renin-angiotensin system was activated, than in animals maintained on ...
Maynard N D - - 1995
STUDY OBJECTIVE: To assess the effect of low dose dopexamine and dopamine on splanchnic blood flow as measured by gastric intramucosal pH, hepatic metabolism of lidocaine (lignocaine) to monoethylglycinexy-lidide (MEGX), and plasma disappearance rate of indocyanine green (ICG). DESIGN: Single-blind randomization of patients with a gastric intramucosal acidosis to receive ...
Melarange R - - 1995
Neutrophils have been implicated in the acute formation of gastric mucosal erosions induced by nonsteroidal antiinflammatory drugs. The aims of the present study were to determine, in rats, the role of neutrophils in the pathogenesis of etodolac- and indomethacin-induced gastrointestinal ulceration and blood loss. Both drugs caused gastrointestinal ulceration, which ...
Sørbye H - - 1995
The effects of intragastric capsaicin and gastric artery ligation on the penetration of the gastric carcinogen N[methyl-3H]-N'-nitro-N-nitrosoguanidine ([3H]MNNG) to proliferative cells were studied in normal and healing rat gastric mucosa. The percentage of S-phase cells labeled with [3H]MNNG in normal corpus mucosa was higher (7.0 +/- 2.0%) after gastric artery ...
Trevethick M A - - 1995
A major impetus to experimental studies examining the pathogenesis of NSAID-induced gastric damage is the hope that key mechanisms can be identified that may lead to the design of "safer" NSAIDs or to the development of novel cytoprotectives to co-administer with current NSAIDs. Virtually every hypothesis proposed to explain the ...
Cirera I - - 1995
BACKGROUND: Previous studies in rats have demonstrated that anemia induces a significant increment in gastric mucosal blood flow. In the present study, we investigated whether chronic anemia induces similar changes in gastric blood perfusion in humans, and if this effect is also present in cirrhotic patients in whom gastric blood ...
Zapata-Sirvent R L - - 1995
Gastrointestinal complications including acute stress ulcerations occur after burn injury. The causes of acute gastric derangements are multiple, and tissue ischemia in the acute period of burn shock may promote breakdown of the gastric mucosal protective barrier. We compared gastric pH in mice after 25% total body surface area, full-thickness ...
Hayes M J - - 1995
BACKGROUND: Obstructive sleep apnoea is a common condition. Treatment with nasal continuous positive airway pressure (CPAP), while effective and safe, causes nasal congestion and stuffiness in some patients. The hypothesis that this study aimed to test was that nasal CPAP with a mouth leak and subsequent unidirectional airflow across the ...
Guslandi M - - 1995
OBJECTIVE: To determine the effect of chronic cigarette smoking on gastric mucosal blood flow and bicarbonate secretion. METHODS: Three groups, each consisting of eight dyspeptic patients with normal endoscopic features, were studied: group A contained non-smokers, group B light smokers (< 10 cigarettes/day) and group C heavy smokers (> 10 ...
Sawant P - - 1995
OBJECTIVE: To assess the effect of a short course of indomethacin on gastric mucosal blood flow (GMBF). METHODS: Patients with musculo-skeletal pain of recent origin and were prescribed a short course of therapy with indomethacin (25 mg tid for 7 days) were studied Baseline measurements of GMBF were carried out ...
Scuri M - - 1995
We have recently developed a noninvasive dimethylether (DME) uptake technique to estimate airway mucosal blood flow (Qaw) in humans (12). Because it was not feasible to validate the technique directly, we undertook the present study to compare Qaw as measured by DME (QDME) and by color-coded microspheres (QM) as a ...
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