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 ...

OBJECTIVE To determine the changes in ionised plasma calcium levels over a 24 h period in patients sustaining blunt trauma injuries and infused with the calcium containing colloid Haemaccel (6.25 mmol/ litre Ca2+). METHODS The study was carried out on 24 trauma patients who attended the accident and emergency (A&E) department of the Leicester Royal Infirmary and required fluid resuscitation. ...

OBJECTIVE To investigate changes in the electrocardiographic QT interval during rapidly induced, sustained hypocalcaemia in healthy volunteers. DESIGN Serial rate corrected QT measurements were made during and after a variable rate trisodium citrate infusion designed to "clamp" the whole blood ionised calcium concentration 0.20 mmol/l below baseline for 120 min. SUBJECTS 12 healthy teetotal...

Accepted for publication 20 January 1995 Abstract Objective-To investigate changes in the electrocardiographic QT interval during rapidly induced, sustained hypocalcaemia in healthy volunteers. Design-Serial rate corrected QT measurements were made during and after a variable rate trisodium citrate infusion designed to "clamp" the whole blood ionised calcium concentration 0-20 mmol/l below base...

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...

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 Abnormal calcium metabolism in the critically ill patient often presents with an alteration in p...

INTRODUCTION Postoperative parathyroid hormone (PTH) levels as a predictor of hypocalcaemia in patients subjected to total thyroidectomy is analyzed. MATERIAL AND METHOD Prospective study involving 67 patients who underwent total thyroidectomy due to a benign disease. Serum PTH and ionised calcium were measured 20 h after surgery. Sensitivity, specificity and predictive values of PTH and ioni...

OBJECTIVE To assess the effect of truncal ligation of the inferior thyroid arteries during bilateral subtotal thyroidectomy on the incidence of hypocalcaemia after thyroidectomy. DESIGN Prospective non-randomised study. SETTING Teaching hospital, Turkey. SUBJECTS 216 patients who had bilateral subtotal thyroidectomy for non-toxic nodular goitre between 1990 and 1996. INTERVENTIONS The t...