Potassium In Man Research Articles

Effect of Succinylcholine on the Level of Serum Potassium in Man

Effect of Succinylcholine on the Level of Serum Potassium in Man

Arrhythmias and potassium in man

Arrhythmias and potassium in man

Effect of exercise on plasma potassium in man.

Effect of exercise on plasma potassium in man.

GLASS ELECTRODE MEASUREMENTS OF BLOOD SODIUM AND POTASSIUM IN MAN.

A practical, simple procedure for the estimation of (Na+) and (K+) in undiluted whole blood or serum is presented. The method uses cation-responsive glass electrodes and is based on a graphic simplification of equations and on calibration steps for deriving the necessary constants. When one electrometer is used, the procedure requires about the same time as standard flame photometry; with two electrometers, it is faster. Values for (Na+) and (K+) in our series of 38 normal young adults compare well both absolutely and in terms of variability with recently published flame photometric measurements in protein-free samples. In a random series of hospital patients, occasional striking divergences suggest that ion binding as a factor in disease warrants further investigation. blood cation activity; electrolytes in man Submitted on March 21, 1963

A vise-configuration β-counter determination of total exchangeable potassium using a low dose of isotope

A β-ray counter in the form of a vise is described. A liquid sample is placed between the two jaws in a novel sample holder. Geometry is extremely reproducible. Efficiency is 28 per cent for K 42 in aqueous samples of 80 ml volume. Liquid samples containing K 42 in concentrations as low as 10 −5 μc/ml may be conveniently assayed with high accuracy. Results are given for measurement of total exchangeable potassium in man using a dose of only 10 μc of K 42, and collecting equilibrium samples 40 and 44 hr after tracer administration, at which time the body burden would be 1 μc or less.

Climatic Variations of Plasma Potassium in Men

PLASMA potassium has been determined in South Indian and European subjects residing permanently in Madras, and in Europeans in Liege—all male, adult and healthy. The samples of blood were taken from the vein in the morning before breakfast and immediately centrifuged. The potassium was determined in the plasma by flame photometry. The meteorological data were obtained from the Regional Meteorological Center, Madras, and the Institut Royal Meteorologique, Uccle, Belgium.

Normal rates of absorption of water, sodium, and potassium in man and animal.

Normal rates of absorption of water, sodium, and potassium in man and animal.

Acute effects of 9alpha-fluorohydrocortisone and 2-methyl-9alpha-fluorohydrocortisone on renal clearances of sodium and potassium in man.

Conclusion1. Intravenous administration of 9 α-fluorohydrocortisone and 2-methyl-9α-fluorohydrocortisone in doses sufficient to produce profound electrolyte effects in 6 salt-depleted and 6 salt-loaded subjects produced no significant change in glomerular filtration rate, with the exception of one salt-depleted subject, in whom there was an increase in both glomerular filtration rate and effective renal plasma flow following 2MeFF. 2. 2MeFF had a more profound sodium-retaining effect than did FF. Even in salt-depleted subjects, the sodium-retaining effects of both compounds were demonstrable. 3. FF had a more profound potassium-losing effect than did 2 MeFF. Kaliuresis was greater in the salt-loaded than in the salt-depleted subjects. 4. Plasma concentrations of sodium, potassium, and chloride did not change significantly during the 4 hour study after intravenous administration of the steroids.

A Method for the Simultaneous Estimation of Total Exchangeable Sodium and Potassium in Man

A simple, rapid and accurate method for the simultaneous estimation of total Nae and Ke in man is described. The technique depends on separation by the human body and on the use of two counters. No chemical processing is entailed, nor does it require the expenditure of more counting time than normally would be required for the estimation of either electrolyte alone.

Improved plastic well scintillators for beta counting: Determination of exchangeable potassium in man using low doses of isotope

In making measurements of exchangeable potassium in man, the dose usually employed is 250–350 μc of K 42. When mixing time is extended to 40 hr after injection of the tracer, accurate assay is difficult, even when using this dose. However, the advent of the plastic scintillator has made possible the construction of very sensitive well counters for β-detection. A new counter of this type is described, which counts K 42 at 15 per cent efficiency in liquid samples of 90 ml volume. Using this counter, measurements of exchangeable potassium can be made by using the specific activity of urine samples obtained 40 or more hr after administration of only 50 μc of K 42. Such urine samples usually have counting rates ranging from 1000 to 2000 counts per min above a background of 150 counts per min. Data are given showing the mixing of 50 μc of K 42 in a healthy man up to 60 hr after tracer administration. The values for exchangeable potassium in this man were computed on the basis of each of four urine samples voided later than 40 hr after injection. These four values for exchangeable potassium had a mean of 4181 m. equiv., with standard deviation 63 m. equiv.

ANTAGONISM BETWEEN THE EFFECT OF ALDOSTERONE AND A SYNTHETIC STEROID LACTONE ON THE RENAL EXCRETION OF SODIUM AND POTASSIUM IN MAN

ANTAGONISM BETWEEN THE EFFECT OF ALDOSTERONE AND A SYNTHETIC STEROID LACTONE ON THE RENAL EXCRETION OF SODIUM AND POTASSIUM IN MAN

Rubidium-86 as a Tracer of Potassium in Man

SERIAL estimations of exchangeable potassium cannot be made after a single dose of potassium-42 because the half-life of the isotope (12.4 hr.) is too short. Rubidium-86 (half-life, 19.5 days) and potassium appear to be handled similarly in man, and Burch et al. 1 have suggested that this isotope could be used as a potassium tracer in prolonged studies.

Radiorubidium (Rb 86) as a tracer of potassium in man with and without chronic congestive heart failure

Radiorubidium (Rb 86) as a tracer of potassium in man with and without chronic congestive heart failure

Serum potassium patterns in anuria and oliguria.

Excerpt Dangerous elevation of serum potassium concentration is most frequently encountered clinically in patients suffering from anuria or oliguria.1, 2, 3In our experience, however, a dangerous r...

Method for simultaneous measurement of total exchangeable body sodium and potassium in man

Method for simultaneous measurement of total exchangeable body sodium and potassium in man

The distribution of sodium and potassium in man.

The distribution of sodium and potassium in man.

The measurement of exchangeable potassium in man by isotope dilution.

The measurement of exchangeable potassium in man by isotope dilution.