Serum ionised calcium concentration: measurement versus calculation.
نویسندگان
چکیده
منابع مشابه
Serum ionised calcium concentration: measurement versus calculation.
Four hundred and eighteen measurements of serum ionised calcium, total calcium, and protein concentrations were made from 47 normal volunteers, 104 patients with chronic renal failure (33 being treated conservatively and 71 with regular haemodialysis), and 83 renal transplant recipients. The serum ionised calcium concentration was measured with an Orion SS-20 meter and calculated from the total...
متن کاملMeasurement of ionised calcium concentration in neonates.
Whole blood ionised calcium concentration was measured simultaneously in capillary and arterial blood from neonates being nursed on an intensive care unit using an ion selective electrode. The mean arterio-capillary difference was -0.027 mmol/l (95% confidence intervals -0.041 to -0.012 mmol/l) and the limits of agreement between the two measurements were 0.034 and -0.088 mmol/l. Measurement of...
متن کاملCorrelation between serum ionised calcium and serum albumin concentrations in two hospital populations.
One quarter of 172 patients from two hospitals with no obvious disturbances of calcium homeostasis and with total serum calcium concentrations that were normal after adjustment for albumin concentration had low serum ionised calcium concentrations. The low values were not due to changes in pH but were associated with hypoalbuminaemia. Significant positive regressions of ionised calcium on album...
متن کاملPopulation based study on serum ionised calcium, serum parathyroid hormone, and blood pressure. The Tromsø study.
OBJECTIVE To study associations between serum ionised calcium, serum parathyroid hormone (PTH) and blood pressure. DESIGN A population based, cross-sectional study was used. METHODS Blood pressure, body mass index, serum ionised calcium and serum PTH were measured in 460 males and 486 females in the Tromso study in 1994/1995. None were on medication for hypertension. The data were analysed ...
متن کاملConcentration of free thyroxin in serum during nonthyroidal illness--calculation or measurement?
We measured the free thyroxin (FT4) concentration in serum from 79 patients with nonthyroidal illnesses (NTI), using two analog RIAs and two calculation methods, and compared the results with those by ultrafiltration (UF) as a reference. The percentage of NTI patients with subnormal concentrations of FT4 was 10.1% by UF; 20.3% by mathematical calculation (MC) according to mass-action theory; 19...
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ژورنال
عنوان ژورنال: BMJ
سال: 1978
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.1.6120.1103