Pseudohyponatremia in elderly patients
نویسندگان
چکیده
منابع مشابه
Pseudohypernatremia and pseudohyponatremia: a linear correction.
BACKGROUND Serum sodium is commonly measured by direct potentiometry (DNa), in blood gas panels, or indirect potentiometry (INa), in metabolic panels run on chemistry analyzers. Abnormal values of the serum non-water fraction interfere with INa, with low values causing pseudohypernatremia (INa > DNa) and high values causing pseudohyponatremia (INa < DNa). Previous attempts to derive a linear co...
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This is the first of two linked articles that highlight the spurious sodium values that can occur if an indirect ISE technique is used to analyze plasma samples with abnormal protein or lipid concentration. The focus of this first article is spuriously reduced sodium (pseudohyponatremia) due to increased plasma protein or lipid concentration, whilst the subject of the second [1] is spuriously i...
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Pseudohyponatremia is caused by an increased serum protein or lipid concentration producing a "space-occupying lesion" in serum water. Its presence and magnitude must be assessed in hyponatremic patients with, for example, paraproteinemia or hyperlipemic diabetic coma. In the absence of a direct-reading ion-selective electrode system, a method for measuring the water content of serum is require...
متن کاملPseudohyponatremia: Does It Matter in Current Clinical Practice?
Serum consists of water (93% of serum volume) and nonaqueous components, mainly lipids and proteins (7% of serum volume). Sodium is restricted to serum water. In states of hyperproteinemia or hyperlipidemia, there is an increased mass of the nonaqueous components of serum and a concomitant decrease in the proportion of serum composed of water. Thus, pseudohyponatremia results because the flame ...
متن کاملTrauma-Related Morbidity and Mortality in Elderly Patients
Objectives: The purpose of this multi-center study was to investigate the probable predictive factors of mortality and morbidity in elderlypopulation. Methods & Materials: The descriptive prospective study was conducted based on the data gathered from trauma cases older than 65 years admitted to Sina, Shohada and Fayaz-Bakhsh trauma centers during years 1997-98. A pre-prepared questionnaire ...
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ژورنال
عنوان ژورنال: QJM
سال: 2008
ISSN: 1460-2725,1460-2393
DOI: 10.1093/qjmed/hcn091