BACKGROUND AND OBJECTIVES Controlling serum potassium is an important goal in maintenance hemodialysis patients. We examined the achievement of potassium balance through hemodialysis treatments and the associated fluctuations in serum potassium. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS A 3-yr (July 2001 to June 2004) cohort of 81,013 maintenance hemodialysis patients from all DaVita dial...

BACKGROUND Healthy cows consume large amounts of potassium and a sudden loss in appetite can lead to hypokalemia. The routine method to evaluate potassium homeostasis is the measurement of the extracellular potassium in plasma or serum, but this does not provide information about the intracellular potassium pool. HYPOTHESIS/OBJECTIVES To evaluate potassium homeostasis by comparing the extrace...

A potassium loading study was performed in acutely nephrectomized rats to determine the extrarenal effects of diuretics on potassium tolerance. Four diuretics were evaluated: hydrochlorothiazide, furosemide, bumetanide, and spironolactone. Following an intravenous potassium load (0.17 mEq/100 g over one hour), plasma potassium concentration rose by 2.69 +/- 0.26 to 3.67 +/- 0.20 mEq/L in all gr...

Lardy & Phillips (1943), and Blackshaw (1953) found that bull and ram spermatozoa show optimum motility in vitro only when at least 5-10 mM-K' ions are present in the rpedium. Potassium also stimulates the metabolism of spermatozoa, and Dott & Walton (1956) have shown that both glycolysis and respiration are needed for maximum motility. Potassium is therefore essential for the motility and meta...

the effects of different levels of nitrogen (100, 200, 300 and 400 mg/l) and potassium (125, 250 and 375 mg/l) on yield and leaf n and k concentrations of tomato were investigated in perlit culture using a factorial randomized design with three replications. the highest fruit yield was obtained with 200 mg/l n. higher levels of nitrogen decreased tomato yield. with increasing nitrogen concentra...

A number of metabolic insults can result in changes to the serum potassium concentration. Potassium is predominantly an intracellular cation, and it has an important role in determining the resting membrane potential of cells. Disruption of the potassium gradient across the cell membrane can result in impaired cellular functioning. This may affect a number of organs including the cardiovascular...

The established associations between blood pressure (BP) and electrolytes are mostly based on either dietary intake or urinary excretion data. We measured office BP, ambulatory BP (ABP) using the automated oscillometric ABPM-630 device, and plasma electrolytes in 82 essential hypertensive patients to examine the relation between BP and plasma electrolytes. Significant negative correlations were...

Stimulation of intact or desheathed frog sciatic nerves produced an increase in the sodium content and a decrease in the potassium content of this tissue. In desheathed preparations the magnitudes of the changes in ionic contents decreased as the concentration of the potassium in the bathing solution was increased, while changing the external sodium concentration produced small effects on the i...

Thiobacillus thiooxidans cells became more hydrophobic but less adhesive to elemental sulfur in the presence of increasing potassium phosphate concentrations. At a fixed concentration of potassium phosphate, however, there was a peak of both cell hydrophobicity and adhesion to sulfur at around pH 5. Oxidation of sulfur by the cells was affected in a complex manner by the phosphate concentration...