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Biomedical subjects

V Coates

Publications and source records attributed to V Coates.

At least 19 recordsLinked to original sources

Disability under Social Security for patients with ESRD: an evidence-based review.

PURPOSE: In the United States, all individuals with end-stage renal (ESRD) disease are automatically eligible for disability benefits under the Social Security Act. Recently, there have been questions about whether the diagnosis of ESRD alone is an appropriate criterion for determining disability under Social Security. METHODS: We conducted a systematic review of the published literature and de novo analysis of data from the United States Renal Data System (USRDS) in an attempt to identify the best predictors of inability to work that might be useful during the disability determination process. RESULTS: The published literature yielded little relevant evidence. The USRDS provided a prospectively-collected set of data on 4,026 incident dialysis patients over their first year on dialysis, a time period particularly applicable to the key questions. However. data from over half of the patients were missing for the most important variables to this project, and only 42% of patients completed the one-year follow-up questionnaire. These limitations rendered de novo analyses unreliable. However, summary statistics did reveal a decreasing number of working individuals over time, from 41.9% before the initiation of dialysis. to 21.1% at initiation, and 6.6% a year later.

Disability Evaluation↗

Prevention of pneumonia in elderly stroke patients by systematic diagnosis and treatment of dysphagia: an evidence-based comprehensive analysis of the literature.

We conducted a systematic literature review and analysis of programs for evaluating swallowing in order to prevent aspiration pneumonia. This article derives from an evidence report on diagnosis and treatment of swallowing disorders (dysphagia) in acute-car stroke patients prepared by us as an Evidence-based Practice Center (EPC) under contract to the U.S. Agency for Healthcare Research and Quality (AHRQ). Available evidence on the diagnosis and treatment of dysphagia for preventing pneumonia is limited. We found reported pneumonia rates in one historical controlled study of a program using bedside exams (BSE) for acute stroke patients; one uncontrolled case series study of acute stroke patient-reporting of swallowing difficulty; one controlled case series study of videofluoroscopic study of swallowing (VFSS) for acute stroke patients; and one historical controlled study of fiberoptic endoscopic examination of swallowing (FEES) for patients referred for swallowing evaluation in rehabilitation centers. Comparing these results with historical controls indicates that implementation of dysphagia programs is accompanied by substantial reductions in pneumonia rates. While all these methods appeared effective, the small sizes of available studies did not allow determination of the relative efficacy of BSE, VFSS, or FEES.

Aged↗

Diagnosed with Hepatitis C: a descriptive exploratory study.

A descriptive exploratory study was carried out to elicit the felt-experience of Hepatitis C infection. A non-probability sampling strategy was employed which generated a sample of nine participants for in-depth interview. Data analysis revealed that the diagnosis had precipitated a transition in the participants' lives. Factors were identified that served as barriers and facilitators to their transition experience. At the time of data collection all of the participants were not experiencing indicators of a healthy transition. It was evident that the transitional experience was neither time-bound nor linear in nature.

Adaptation, Psychological↗

Binding of alpha-bungarotoxin and cholinergic ligands to acetylcholine receptors in the membrane of skeletal muscle.

A membrane fraction enriched in acetylcholine receptors was prepared from denervated cat leg muscles. 97% of the alpha-bungarotoxin-binding sites in the dispersed membranes are sensitive to nicotinic cholinergic ligands. In intact msucle, 90% are. A filtration assay of the binding to the membranes of tritiated alpha-bungarotoxin, as retarded by these ligands, provides a convenient system for the determination of affinities of ligands for the muscle receptor in its membrane-bound state. Affinities were found thus for 6 nicotinic ligands. An allosteric system, rather than desensitisation, may explain the high affinities observed for certain ligands.

Acetylcholine↗

Partial monosomy and partial trisomy 18 in two offspring of carrier of pericentric inversion of chromosome 18.

A pericentric inversion of chromosome 18 is described in the mother of a patient with clinical diagnosis of 18q--syndrome. The propositus' chromosome complement includes the recombinant 18 with deficiency of the distal one-third of the long arm and duplication of the terminal segment of the short arm. The propositus' sister carrier the recombinant 18 with a duplication of the distal one-third of the long arm and a deficiency of the terminal segment of the short arm. The relative length of the inverted segment represents about 60% of the total chromosome 18 length. The probability of recombinant formation following the occurrence of a chiasma within the inverted segment is predicted to be high.

Child, Preschool↗

Reticulocytosis in response to dietary antioxidants.

Alpha-tocopheryl acetate, 1, 2, dihydro-6-ethoxy-2, 2, 4-trimethylquinoline, and butylated hydroxytoluene increased the number of circulating reticulocytes when added to the diet of chickens. Hematocrit values were not reduced and erythrocyte life-spans were not shortened by the antioxidants. The reticulocytosis is attributed to delayed loss of reticular material from the maturing erythrocytes. components.

Animal Nutritional Physiological Phenomena↗

[Peptic disease: comparative study between children and adolescents]

OBJECTIVES: To make a comparative analysis of clinical and endoscopic data in peptic disease in a group of children (CR) and adolescents (AD).MATERIAL AND METHODS: 30 children and 76 adolescents with peptic disease were studied between August 1992 and November 1994. In all cases the diagnosis was confirmed by endoscopic and histologic examination. Clinical data referring abdominal pain (localization, degree of intensity, chronicity and related symptons) were compared in both groups. Statistical analysis was done by the Fisher Test (significance value p< 0.05).RESULTS: Findings referring to predominance in the female sex (66% in group CR versus 70% in group AD), duration of pain between 2 and 6 months (40% CR versus 38% AD), intensive degree of pain (70% CR versus 83% AD) and presence of vomiting and nausea (42% CR versus 55% AD) were similar in both groups. Epigastric pain was predominant in AD (87%) versus CR (63%) with significant difference p=0.012. The endoscopic findings were normal in 30% of CR and 14% AD (p=0.052). Light to moderate gastritis was significantly more common in AD (72%) than CR (37%) (p=0.01). In the CR group, there was mainly antral nodular gastritis while in AD the diffuse form was more frequent. Bulbar duodenitis was present in 10% CR and 12% AD, but it was more erosive and serious in children. Peptic ulceration was found in 16% of CR (2 gastritis and 3 duodenal) and 7% AD (1 gastric and 4 duodenal) (p=0.067). H. pylori colonization was more frequent in AD (52%) than in CR (36%) (p=0.195).CONCLUSIONS: 1) epigastric pain is the main symptom in both groups; 2) endoscopic findings may be normal especially in the childreńs group; 3) antral nodular gastritis is the predominant type in children while in adolescents it is diffuse gastritis; 4) H. pylori colonization is present in 1/3 of children and 1/2 of adolescents with peptic disease; 5) in both groups ulcers are more frequent in the duodenum.

Journal Article↗