The effects of providing ultraviolet (uv) radiation (285 to 315 nm, ultraviolet B) on calcium metabolism in two groups of 20 healthy grey parrots (Psittacus e erithacus) fed either a seed or pellet-based diet were investigated. There was a significant increase in the concentration of ionised calcium in the plasma of both groups, independent of the calcium and vitamin D(3) content of the diets f...

Osteoclasts are large multinucleate cells unique in their capacity to resorb bone. These cells are exposed locally to high levels of ionised calcium during the process of resorption. We have therefore examined the effect of elevated extracellular calcium on the morphology and function of freshly disaggregated rat osteoclasts. Cell size and motility were quantitated by time-lapse video recording...

OBJECTIVE To review the components of calcium, phosphate and magnesium metabolism that are relevant to the critically ill patient in a two-part presentation. DATA SOURCES A review of articles reported on calcium, phosphate and magnesium disorders in the critically ill patient. SUMMARY OF REVIEW Calcium, phosphate and magnesium have important intracellular and extracellular functions with th...

The Nova Stat Profile 1 analyser, a combined sodium, potassium, ionized calcium, haematocrit and conventional blood gas analyser, was evaluated over a four month period. In addition to assessing and demonstrating that the instrument met analytical requirements, an appreciation of the use of ionised calcium (iCa) was made. Prospective costs were characterised and practical problems of iCa measur...

Background Exsanguination and coagulopathy remain one of the leading causes of preventable trauma related death [1]. Low ionised calcium levels have been associated with hypotension and increased mortality [2]. Blood product contains citrate that acts as a calcium chelating agent. We hypothesized that trauma patients are at risk of hypocalcaemia and blood products given to resuscitate them woul...

Objective: To compare adjusted calcium levels with ionised Calcium in chronic renal failure patients hypoalbuminemia for the correct assessment of their status.
 Study Design: Cross-sectional study.
 Place and Duration Study: Department Chemical Pathology Endocrinology, Armed Forces Institute Pathology, Rawalpindi Pakistan, from Mar 2020 to Jan 2021.
 Methodology: A total 304 ind...

AIM To investigate possible abnormalities of serum potassium and calcium levels in patients with essential thrombocythaemia and significant thrombocytosis. METHODS 24 cases of essential thrombocythaemia with significant thrombocytosis (platelet count > 700 x 10(9)/litre) had serum potassium and calcium estimations performed at the time of maximum thrombocytosis before treatment, and at the ti...

IT is often stated that the addition of a citrate to milk prevents clotting by rennin because an un-ionised calcium citrate is formed, thus removing the calcium ions from solution, these ions being considered essential for the clotting process. The prevention of the clotting of blood by citrates is explained in the same way. It is not the purpose of this paper to discuss the clotting phenomenon...