Using a calcium-containing heparin preparation for anticoagulation, we determined [Ca2+], the mean concentration of ionized calcium, in whole blood of 120 healthy blood-donors to be 1.23 (SD 0.04) mmol/L. Similarly, for 50 intensive-care patients selected without conscious bias, the correlation between [Ca2+] in serum (mean 1.15, SD 0.10 mmol/L) and in whole-blood samples anticoagulated with th...

the purpose of this study was to examine the effects of omega3 and aerobic exercise intervention on the calcium metabolism regulating hormones in non – athlete postmenopausal women. for this purpose 40 healthy non – athlete postmenopausal women with age 57.72±3.53 years, height 157,75±9,24 cm, weight 58.08±12.76kg, bmi 23.78±3.73kg/m2, fat 23.18±4.68% volunteered in this study. subjects in a do...

Calcium chloride and calcium gluceptate were compared in their ability to increase plasma ionized calcium concentrations ([Ca2+]). To correct a low ionized calcium concentration, each of 10 critically ml of a 10% solution, containing elemental calcium 27 mg ml-1) and calcium gluceptate (20 ml, containing elemental calcium 18 mg ml-1) over a 5-min period in randomized order approximately 6 h apa...

The association between blood calcium levels and electrocardiographic variables was compared in 137 normal parturient and 36 peripartum recumbent Holstein cows to determine whether hypocalcemia in peripartum dairy cows can be rapidly diagnosed using electrocardiograph. Inverse of STc (ST peak interval/SS interval(0.5)) and blood ionized calcium or serum calcium concentrations were strongly corr...

Calcium plays a pivotal role in excitation-contraction coupling of cardiomyocytes and many other cellular responses observed in cardiovascular cells. Thus maintaining a healthy status requires very strict regulation of cytoplasmatic but also plasma ionized calcium concentration. Plasma ionized calcium is regulated by calcium sensing and the regulation of calcium uptake and secretion. Under cond...

Homeostasis of ionized calcium in biofluids is critical for human biological functions and organ systems. Measurement of ionized calcium for clinical applications is not easily accessible due to its strict procedures and dependence on pH. pH balance in body fluids greatly affects metabolic reactions and biological transport systems. Here, we demonstrate a wearable electrochemical device for con...

Since 2012, citrate anticoagulation is the recommended anticoagulation strategy for continuous renal replacement therapy (CRRT). The main drawback using citrate as anticoagulant compared with heparin is the need for calcium replacement and the rigorous control of calcium levels. This study investigated the possibility to achieve anticoagulation while eliminating the need for calcium replacement...

Continuous nondestructive monitoring of intracellular ionized calcium in isolated squid axons by differential absorption spectroscopy (using arsenazo III and antipyrylazo III) was used to study uptake of calcium by carbonyl cyanide, p-trifluoromethoxy-phenylhydrazone (FCCP)- and (or) cyanide (CN)-sensitive and insensitive constituents of axoplasm. Known calcium loads imposed on the axon by stim...