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Query: UMLS:C0017168 (gastroesophageal reflux disease)
 11,783 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Aspiration can result from muscular weakness or paralysis of laryngopharyngeal muscles after lower motor neuron disorders (e.g., stroke) or unchecked gastroesophageal reflux. We submit that rehabilitation of the finely tuned swallowing mechanism should provide at least restoration of the normal dynamic relationships between glottic closure and cricopharyngeal relaxation. In three dogs under general endotracheal anesthesia, the recurrent laryngeal nerves and the pharyngeal musculature were exposed through a midline cervical incision. A tracheotomy was performed to allow unhindered laryngoscopic exposure of the vocal cords. A no. 9 endotracheal tube passed through the upper esophageal sphincter was used as a pressure transducer by saline inflation of its cuff and linked to an oscilloscope. The cricopharyngeus was placed under baseline tension with pulse trains administered by an intramuscular needle with a circuit previously used for agonist/antagonist coupling of reinnervated facial musculature. A second output channel was linked to the contralateral recurrent laryngeal nerve by a bipolar electrode. As the pulse width of the current to the recurrent laryngeal nerve increased, that to the cricopharyngeus was reciprocally decreased, producing snug glottic closure and synchronous cricopharyngeal relaxation. Results were documented on videotape. These findings were highly reproducible. We believe that the novel approach proposed in the current model offers an attractive solution to long-term aspiration problems resulting from an imbalance between vocal cord and cricopharyngeal activities.
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PMID:Electronic integration of glottic closure and circopharyngeal relaxation for the control of aspiration: a canine study. 787 Apr 44

Gastrointestinal and liver disorders are often observed in high performance athletes, especially those training for the increasingly popular endurance sports including the marathon and the triathlon. The disorders often start with stress before competition or training, followed by dehydration during the event. Insufficient training is an aggravating factor as are certain environmental factors including hot climate, irregular terrain and high altitude. Athletes may also consume non-steroid anti-inflammatory drugs, for example after a minor bone lesion or joint sprain, in an attempt to maintain their highest level of performance. Gastric signs include epigastric pain known to be caused by ischaemic gastritis resulting from decreased splanchnic flow and increased vasoconstriction in the gastric mucosa. Gastrooesophageal reflux results from modifications in sphincter tone and gastric emptying. Drinking hyperosmolar liquids also plays a role. Abdominal pain, diarrhoea, melena and uncommonly ischaemic colitis are the main signs of colic disorders. Mesenteric ischaemia may occur due to lowered splanchnic blood supply (by as much as 80% in some cases). Mechanical trauma is another mechanism; in marathon runners the "caecal slap syndrome" is a repeated microtrauma of the caecum against a hypertrophied muscular wall. Waterborne infectious agents may also lead to colic lesions. Exertion heat stroke is an emergency situation which can cause multiple organ damage and usually occurs after long intense exercise, often, but not always in a hot environment. Uncompensated thermogenesis and excessive loss of water by perspiration leads to central hyperthermia and ischaemic hepatic necrosis. Fatal liver failure has been observed. More or less severe symptoms of gastrointestinal or hepatic disorders are observed in 30% of high performance athletes and the incidence may reach 40% in those who have trained insufficiently. Such disorders lead to reduced performance in 10% of these athletes.
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PMID:[Hepato-digestive disorders in athletic practice]. 802 25

Because aspiration pneumonia contributes significantly to morbidity and mortality in hospitalized patients, this study was undertaken to identify risk factors for morbidity and mortality associated with aspiration pneumonia. Patients with a discharge diagnosis of aspiration pneumonia in 1985 and 1990 were studied. Factors associated with death from aspiration pneumonia were: altered mental status, cerebrovascular accident, endotracheal intubation, tachycardia, and hypoxemia. Fever, cough, and unilateral infiltrates on chest radiograph were associated with survival. Attention to proper positioning of comatose patients, aggressive treatment of gastroesophageal reflux, and strict attention to endotracheal tubes and tracheostomies should decrease the morbidity and mortality associated with aspiration pneumonia.
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PMID:Risk and outcome of aspiration pneumonia in a city hospital. 835 Mar 75

A prematurely born 5-year-old boy with chronic lung disease, hypoxic-ischemic encephalopathy, cerebral palsy, repeated aspiration pneumonia, and stroke underwent percutaneous endoscopic jejunostomy (PEJ) to alleviate repeated aspiration pneumonia. Studies, including 24-hour esophageal pH monitoring, 99mTc gastric emptying time, upper gastroesophageal barium radiography, and endoscopic examinations showed severe gastroesophageal reflux and prolonged gastric emptying. Percutaneous endoscopic gastrostomy (PEG) was performed first, followed by placement of a polyurethane J-tube (9 French) through the preexisting gastrostomy site. We passed the style-guided J-tube through the pyloric ring endoscopically and advanced it to the jejunum. The position of the J-tube was confirmed by radiologic study. Feeding with an elemental formula, 20 mL/hour, commenced immediately after the procedure, and the rate was gradually increased to 50 mL/hour. No further episodes of aspiration pneumonia have occurred since J-tube placement. Our initial experience with jejunal feeding through a PEJ is encouraging.
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PMID:Pediatric percutaneous endoscopic jejunostomy by J-tube extension through a preexisting gastrostomy site: a preliminary report. 988 93

Glottic adduction couples with relaxation of the tonically contracted upper esophageal sphincter (UES) to constitute the end point of pharyngeal swallowing. Together with deglutitive laryngeal elevation, this reciprocal relationship contributes to protecting the lungs from aspiration. Degrees of uncoordination between glottic and upper esophageal sphincters can be seen under diverse circumstances of neurologic damage such as stroke, gastroesophageal reflux, and in the growing elderly population presenting with weaker musculature. We hypothesized that reciprocal coupling between glottic closure and UES relaxation may be artificially reestablished through vagal stimulation if the appropriate neural centers and their leading pathways remain capable of exciting a critical number of motor units. Orderly recruitment of the vagus nerve was produced in three dogs with a circuit superimposing 600-Hz, 3800-0-microA blocking over 10-70-Hz, 0-2300-microA stimulating currents. Amplitudes of motor unit or compound muscle action potentials were recorded from the thyroarytenoideus and cricopharyngeus via surface electromyographic electrodes. Stimulation was accompanied by a drop in UES intraluminal pressure. The reciprocal relationship between the two muscles could be time locked within certain stimulus parameters. We submit that electronic coupling between the glottic and UESs may show promise in preventing aspiration under selected circumstances.
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PMID:Vagal stimulation for reciprocal coupling between glottic and upper esophageal sphincter activities in the canine. 1046 44

Swallowing disorders are common, especially in the elderly, and may cause dehydration, weight loss, aspiration pneumonia and airway obstruction. These disorders may affect the oral preparatory, oral propulsive, pharyngeal and/or esophageal phases of swallowing. Impaired swallowing, or dysphagia, may occur because of a wide variety of structural or functional conditions, including stroke, cancer, neurologic disease and gastroesophageal reflux disease. A thorough history and a careful physical examination are important in the diagnosis and treatment of swallowing disorders. The physical examination should include the neck, mouth, oropharynx and larynx, and a neurologic examination should also be performed. Supplemental studies are usually required. A videofluorographic swallowing study is particularly useful for identifying the pathophysiology of a swallowing disorder and for empirically testing therapeutic and compensatory techniques. Manometry and endoscopy may also be necessary. Disorders of oral and pharyngeal swallowing are usually amenable to rehabilitative measures, which may include dietary modification and training in specific swallowing techniques. Surgery is rarely indicated. In patients with severe disorders, it may be necessary to bypass the oral cavity and pharynx entirely and provide enteral or parenteral nutrition.
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PMID:Evaluation and treatment of swallowing impairments. 1079 85

Dysphagia is a problem that commonly affects patients cared for by family physicians in the office, as hospital inpatients and as nursing home residents. Familiar medical problems, including cerebrovascular accidents, gastroesophageal reflux disease and medication-related side effects, often lead to complaints of dysphagia. Stroke patients are at particular risk of aspiration because of dysphagia. Classifying dysphagia as oropharyngeal, esophageal and obstructive, or neuromuscular symptom complexes leads to a successful diagnosis in 80 to 85 percent of patients. Based on the patient history and physical examination, barium esophagram and/or gastroesophageal endoscopy can confirm the diagnosis. Special studies and consultation with subspecialists can confirm difficult diagnoses and help guide treatment strategies.
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PMID:Evaluating dysphagia. 1089 35

The prevalence of obesity is increasing worldwide. In the United States, in 1999, 27% of adults had a body mass index >30 kg/m(2), almost double the prevalence of 20 years earlier. The estimated mortality from obesity-related diseases in the United States is approximately 300,000 annually and growing. In the future, mortality related to obesity is expected to exceed that of smoking. Numerous diseases are caused or made worse by obesity. These include type 2 diabetes; hypertension; dyslipidemia; ischemic heart disease; stroke; obstructive sleep apnea; asthma; nonalcoholic steatohepatitis; gastroesophageal reflux disease; degenerative joint disease of the back, hips, knees, and feet; infertility and polycystic ovary syndrome; various malignancies; and depression. Type 2 diabetes is perhaps the most visible obesity-related problem. Present in at least 14 million Americans, it leads to serious complications and premature death. It is largely caused by obesity, and is generally cured by weight loss. The quality of life of the obese is markedly reduced, and the costs to health care systems are great. Preventive programs have yet to affect the rising prevalence. An effective solution is needed.
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PMID:The extent of the problem of obesity. 1252 43

Obstructive sleep apnea (OSA) occurs commonly in the U.S. population and is seen in both obese as well as non-obese individuals. OSA is a disease characterized by periodic upper airway collapse during sleep, which then results in either apnea, hypopnea, or both. The disorder leads to a variety of medical complications. Neuropsychiatric complications include daytime somnolence, cognitive dysfunction, and depression. Increased incidence of motor vehicle accidents has been documented in these patients and probably reflects disordered reflex mechanisms or excessive somnolence. More importantly, vascular disorders such as hypertension, stroke, congestive cardiac failure, arrhythmias, and atherosclerosis occur frequently in these patients. The lungs may be affected by pulmonary hypertension and worsening of asthma. Recent data from several laboratories demonstrate that obstructive sleep apnea is characterized by an inflammatory response. Cytokines are elaborated during the hypoxemic episodes leading to inflammatory responses as marked clinically by elevated C-reactive protein (CRP). As elevated CRP levels are considered markers of the acute phase response and characterize progression of vascular injury in coronary artery disease, it is likely that obstructive sleep apnea could lead to worsening of vasculopathy. Moreover, as inflammatory mechanisms regulate bronchial asthma, it is also likely that cytokines and superoxide radicals generated during hypoxemic episodes could exacerbate reactive airway disease. Patients with Cough, Obstructive sleep apnea, Rhinosinusitis, and Esophageal reflux clustered together can be categorized by the acronym, "CORE", syndrome. The purpose of this manuscript is to review the inflammatory responses that occur in patients with obstructive sleep apnea and relate them to the occurrence of cardiopulmonary disease.
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PMID:Obstructive sleep apnea, inflammation, and cardiopulmonary disease. 1535 23

Clinical relevance of infection with different Helicobacter pylori strains was reviewed in this paper. Helicobacter pylori (H. pylori) infection plays a role in pathogenesis of chronic gastritis, peptic ulcer disease, gastric adenocarcinoma and MALT lymphoma. Extragastric manifestations of H. pylori infection most probably include acne rosacea and chronic urticaria, while the importance of H. pylori infection for pathogenesis of growth retardation in children, iron deficiency anemia, coronary heart disease, stroke and idiopathic thrombocytopenic purpura remains vague. The expression of two H. pylori proteins, cytotoxin associated protein (cag A) and vacuolization cytotoxin (vac A) is considered to be related with pathogenicity of the bacterium. It is clear that presence of cag A+ strains is important for development of peptic ulcer; nevertheless, it is also protective against esophageal reflux disease. On the other hand, cag A+ strains are common in gastric adenocarcinoma and MALT lymphoma patients, but it seems that certain subtypes of vac A cytotoxin are more important risk factors. Infection with cag A+ strains is more common in patients with acne rosacea, stroke and coronary heart disease.
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PMID:[Clinical significance of infection with cag A and vac A positive Helicobacter pylori strains]. 1593 30


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