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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of nuclear medicine 23 (1996), S. 213-225 
    ISSN: 1619-7089
    Keywords: Body-composition methodology ; Cirrhosis ; Fat ; Fat-free mass ; Multi-component models
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Very little information is available on body composition in patients with cirrhosis. Difficulties arise in studying these patients because they tend to retain fluid and this results in changes in tissue density and in the hydration fraction of fat-free mass. As the classic body composition techniques rely on the assumption that these variables remain constant, use of these methods will result in either under- or overestimates of body composition variables. Use of multi-component models, employing two or more measurement techniques, will obviate the need for some of the assumptions inherent in the use of single techniques, thereby increasing the accuracy of the assessments, without loss of precision.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Digestive diseases and sciences 28 (1983), S. 321-327 
    ISSN: 1573-2568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The absorption of nonheme59ferric chloride from a test meal was measured, using a whole-body counter, in 34 alcoholics with liver disease of varying severity, 30 of whom had normal hemoglobin values and four of whom were anemic. The results were compared with those obtained in five patients with iron-deficient anemia and nine healthy control subjects. There were no significant differences in mean percentage iron absorption (±sem) in the nonanemic alcoholic patients with fatty liver (14.6±3.7), alcoholic hepatitis (18.6±5.7), or cirrhosis (21.1±3.5) when compared with control subjects (22.0±2.5). Significantly increased mean percentage iron absorptions were seen, however, in the patients with iron-deficient anemia (64.8±5.6;P〈0.0001) and the alcoholics with anemia (60.7±7.8;P〈0.0001). There was an inverse relationship between iron absorption and serum ferritin concentration in the nonanemic alcoholics (r=−0.37;P〈0.025) but no correlation between iron absorption and liver iron concentration. The addition of absolute alcohol (0.5 g/kg body weight) to the test meal resulted in an increase in mean percentage iron absorption in eight control subjects (21.6±1.6 to 29.0±6.1) and in ten nonanemic alcoholics (15.8±3.2 to 20.0±3.8), although these differences did not achieve significance. Similarly when intravenous alcohol was given to four control subjects at the time of the test meal, iron absorption increased in all four so that the mean percentage iron absorption increased, although not significantly, from 17.6±2.7 to 39.3±9.5. Iron absorption in alcoholics does not differ significantly from normal. While the increased liver iron concentrations seen in approximately one third of alcoholics cannot be attributed to an increase in iron absorption as a result of chronic alcohol ingestion, further studies are needed to elucidate the acute effects of alcohol on iron absorption.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-7365
    Keywords: Chronic hepatic encephalopathy ; regional variation ; brain ; proton magnetic resonance spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Regional variations in proton magnetic resonance spectroscopy (MRS) were assessed in 26 patients and 14 healthy volunteers using a two dimensional chemical shift imaging technique. Patients were classified as being neuropsychiatrically unimpaired, or as having subclinical or overt chronic hepatic encephalopathy (CHE). Peak area ratios of choline (Cho), glutamine and glutamate (Glx) and N-acetylaspartate (NAA) relative to creatine (Cr) were measured. Significant reductions in mean Cho/Cr and elevations in mean Glx/Cr were observed in the patient population, which correlated with the severity of CHE. There were significant regional variations in these metabolite ratios with the mean Cho/Cr lowest in the occipital cortex and the mean Glx/Cr highest in the basal ganglia. NAA/Cr remained relatively constant in all areas of the brain analysed. The regional variation in the metabolite ratios suggests that spectral information from more than one voxel may be useful in the assessment of patients with CHE.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Metabolic brain disease 13 (1998), S. 273-290 
    ISSN: 1573-7365
    Keywords: Astrocytes ; encephalopathy ; hepatic ; globus pallidus ; liver cirrhosis ; liver failure ; Magnetic Resonance Imaging ; manganese ; portal-systemic shunt
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Bilateral, symmetrical hyperintensity of the globus pallidus is observed in T1-weighted cerebral magnetic resonance images in from 52 to 100% of patients with chronic liver disease. No significant relationship exists between the presence of these cerebral changes in image signal intensity and the patients' neuropsychiatric status. However, their presence significantly relates to both the severity of the liver disease and the presence and degree of portal-systemic shunting of blood. This shortening of the T1-relaxation time is associated with pallidal deposition of manganese most likely reflecting the presence of an adaptive process designed to improve the efficacy of ammonia detoxification by astrocytes. Future studies employing magnetic resonance imaging techniques to obtain information on cerebral function or combined with magnetic resonance spectroscopy to obtain localized biochemical information might further our understanding of the pathogenesis of hepatic encephalopathy in cirrhotic patients.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Digestive diseases and sciences 24 (1979), S. 305-310 
    ISSN: 1573-2568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In a population of 157 (120 males, 37 females) predominantly British alcoholics with liver disease, the incidence of some degree of hepatic siderosis, as estimated by stainable parenchymal iron, was 57.3%. The incidence of significant siderosis (grades III and IV) was 7%, and was similar for both sexes. In the female alcoholics there was a significant correlation between age and the degree of siderosis (P〈0.05)-four of the five females with significant siderosis being premenopausal. In the male alcoholics there was a significant inverse relationship between the grams of ethanol consumed per day and the degree of siderosis (P〈0.05) and a significant correlation between the percentage saturation of iron-binding protein and the degree of siderosis (P〈0.05). The mean daily iron intake from alcoholic beverages was 1.5 mg; there was no relationship between the amount of iron ingested in the alcohol and the degree of siderosis. In this population of alcoholics the incidence of significant siderosis in both sexes was low.
    Type of Medium: Electronic Resource
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