Comparison of Plasma Uric Acid Levels Obtained with Five Different Methods

1957 ◽  
Vol 3 (3) ◽  
pp. 156-159 ◽  
Author(s):  
Eugene L Kanabrocki ◽  
Joseph Greco ◽  
Lee Wilkoff ◽  
Roger Veach
Keyword(s):  
Uric Acid ◽  
Plasma Concentration ◽  
Normal Values ◽  
Normal Subjects ◽  
Plasma Uric Acid

Abstract 1. A comparison has been made of plasma values obtained by 5 different methods for uric acid estimation. 2. According to the uricase method, the plasma concentration of uric acid in fasting normal subjects ranged from 1.9-5.1 with average of 3.7 mg. per 100 ml. 3. The closest agreement with the uricase method was obtained with the method of Kern and Stranaky which gave normal values ranging from 2.8 to 4.9 with an average of 3.8 mg. per 100 ml. 4. A variation of about 25 per cent was observed in the plasma uric acid levels over a period of 7 weeks.

Warfarin administration increases uric acid concentrations in plasma.

1986 ◽  
Vol 32 (8) ◽  
pp. 1557-1559 ◽  
Author(s):  
R K Menon ◽  
D P Mikhailidis ◽  
J L Bell ◽  
P B Kernoff ◽  
P Dandona
Keyword(s):  
Uric Acid ◽  
Single Dose ◽  
Normal Values ◽  
High Plasma ◽  
Term Therapy ◽  
Plasma Urea ◽  
Plasma Uric Acid ◽  
Warfarin Treatment ◽  
Long Term Therapy

Abstract The effect of warfarin administration on plasma uric acid was investigated. A representative sample of patients on long-term warfarin treatment had a significantly higher concentration of uric acid in plasma than did age-matched patients with comparable plasma urea concentrations who were not taking warfarin. In women, this association was observed only in patients with normal values for plasma urea, not in those with high values. In contrast, in men this association was present in both groups (normal and high plasma urea). In a longitudinal study involving patients, their plasma uric acid significantly increased after warfarin administration. There was no significant change in the renal clearance of uric acid after a single dose of warfarin in normal, healthy volunteers; this contrasts with the increase observed with other coumarin anticoagulants. Our findings suggest that the increase in plasma uric acid noted with warfarin administration is probably due to an increase in uric acid production and may predispose to gout those patients who are on long-term therapy with warfarin.

Plasma Uric Acid Concentration Related to the Urinary Excretion of Aldosterone and of Electrolytes in Normal Subjects

1975 ◽  
Vol 49 (6) ◽  
pp. 613-616 ◽  
Author(s):  
L. E. Ramsay ◽  
R. M. Auty ◽  
C. E. Horth ◽  
D. Levine ◽  
J. R. Shelton ◽  
...  
Keyword(s):  
Uric Acid ◽  
Urinary Excretion ◽  
Sodium Excretion ◽  
Partial Correlation ◽  
Normal Subjects ◽  
Uric Acid Concentration ◽  
Potassium Excretion ◽  
Sodium Potassium ◽  
Plasma Uric Acid ◽  
Sodium And Potassium

1. The relations between the concentration of plasma uric acid and urinary excretion of aldosterone, sodium and potassium, were studied in ten healthy males on a diet containing 160 mmol of sodium and 90 mmol of potassium per day. 2. Plasma uric acid correlated positively with aldosterone excretion and this correlation was statistically independent of sodium and potassium excretion. 3. Plasma uric acid correlated positively with potassium excretion and negatively with the urinary sodium/potassium ratio. There was no significant simple correlation with sodium excretion but the partial correlation of plasma uric acid and sodium excretion was negative and significant when excretion of aldosterone and potassium were held constant.

Induced hyperglycemia alters antithrombin III activity but not its plasma concentration in healthy normal subjects

Diabetes ◽  
1987 ◽  
Vol 36 (3) ◽  
pp. 320-323 ◽  
Author(s):  
A. Ceriello ◽  
D. Giugliano ◽  
A. Quatraro ◽  
G. Consoli ◽  
A. Stante ◽  
...  
Keyword(s):  
Plasma Concentration ◽  
Antithrombin Iii ◽  
Normal Subjects ◽  
Antithrombin Iii Activity

Computerized method for validating laboratory reference ranges for triiodothyronine and thyroxin immunoassays

1991 ◽  
Vol 37 (3) ◽  
pp. 438-442 ◽  
Author(s):  
Brian Luttrell ◽  
Sall Watters
Keyword(s):  
Reference Range ◽  
Normal Values ◽  
Reference Group ◽  
Normal Population ◽  
Normal Subjects ◽  
Reference Ranges ◽  
Large Samples ◽  
Laboratory Reference ◽  
Euthyroid Status ◽  
Computer Based

Abstract We used a computer-based method to help validate the reference ranges of assays for triiodothyronine (T3) and thyroxin (T4). A retrospective search of a database of laboratory results for the previous six months identified all patients with apparent euthyroid status, as defined by methods independent of the immunoassay under review. A computer-generated reference group (CGR Group) of 2001 records had a gaussian distribution of T4 values and a reference range (mean +/- 2 SD) of 56-161 nmol/L, compared with the supplier's suggested range for euthyroid subjects (58-148 nmol/L) and an in-house range of 60-144 nmol/L for a group of 97 normal subjects. A similar CGR Group of 1902 records gave a reference range for T3 of 0.7-2.1 nmol/L (manufacturer's range 0.8-2.8; normal subjects 0.8-2.2). An attempt to devise a reference range for thyrotropin failed when we found that its concentration in the population of patients with normal values for thyroid hormones was distributed differently from that in the normal population. The method is intended to be used in addition to conventionally derived ranges based on results for healthy subjects. It allows the laboratory to conveniently verify the reference ranges for T3 and T4 assays at regular intervals by using very large samples with appropriate age, sex, and weight distribution, drawn from the population of patients' samples submitted for analysis.

scholarly journals Caffeine improves biochemical and specific performance after judo training: a double-blind crossover study in a real judo training situation

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Kelvin Euton Oliveira Carmo ◽  
Diego Ignácio Valenzuela Pérez ◽  
Charles Nardelli Valido ◽  
Jymmys Lopes dos Santos ◽  
Bianca Miarka ◽  
...  
Keyword(s):  
Heart Rate ◽  
Uric Acid ◽  
Body Mass ◽  
Perceived Exertion ◽  
Rating Of Perceived Exertion ◽  
Power Performance ◽  
Double Blind ◽  
Biochemical Effect ◽  
Plasma Uric Acid ◽  
Hemodynamic Variables

Abstract Background Nutritional ergogenic aids are foods or nutrients that can improve physical performance. Among these foods with ergogenic properties, caffeine has shown that it can increase the fat catabolism, strength, and improve the cognition and time reaction of an athlete, therefore, it is hoped that it can improve the performance of judokas. This study through a double-blind crossover (supplement X placebo) protocol, investigated the effects caffeine supplementation (single capsule containing 5 mg/kg body mass intake 60 min before the session) on biochemical, anthropometrical, physical, subjective and hemodynamic variables measured before, during and after two typical judo trainingcxs sessions (120-min: 40-min of gymnastics; 40-min of specific technics and; 40-min of judo combat). Methods 8 high-level athletes (21.4 ± 2.0 years; 83.6 ± 15.2 kg; 1.8 ± 0.1 m; 17.9 ± 7.0 Fat%) were evaluated before and after each training for body mass, hydration, upper and lower limb power, performance in the special judo fitness test (SJFT), free fatty acids (FFA) in plasma, uric acid, glucose, lactate, heart rate, and pain. In addition, heart rate, FFA in plasma, uric acid, glucose, lactate, rating of perceived exertion and pain were assessed during the training. Results At 120 min, supplementation resulted in a higher concentration of plasma FFA (1.5 ± 0.5 vs. 1.0 ± 0.3 mmol/L; p = 0.047) and lactate (4.9 ± 1.8 vs. 3.0 ± 1.2 mmol/L; p = 0.047), and a lower concentration of uric acid (5.4 ± 0.9 vs. 7.0 ± 1.5 mg/dL; p = 0.04). Supplementation also resulted in performance maintenance (fatigue index) in the SJFT (Δ0.3 ± 2.0 vs Δ1.7 ± 2.5, for caffeine and placebo respectively, p = 0.046). No adverse effects were observed. Conclusion Based on the applied dose, intake time, and sample of this study, we can conclude that caffeine produces an ergogenic biochemical effect, and improves performance in judo athletes.

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