Hypocalcaemia
In medicine, hypocalcaemia is the presence of less than a total calcium of 2.2 mmol/L (9mg/dl), or an ionized calcium of less than 1.1 mmol/L (4.5 mg/dL) in the serum.
Causesabsent parathyroid hormone (PTH)*hereditary hypoparathyroidism*acquired hypoparathyroidism*hypomagnesemiaineffective PTH*chronic renal failure*absent active vitamin D**decreased dietary intake**decreased sun exposure**defective Vitamin D metabolism***anticonvulsant therapy***vitamin-D dependent rickets, type I*ineffective active vitamin D**intestinal malabsorption**vitamin-D dependent rickets, type II*pseudohypoparathyroidismdeficient PTH*severe acute hyperphosphatemia**tumor lysis syndrome**acute renal failure**rhabdomyolysis (initial stage)*osteitis fibrosa following parathyroidectomy
See alsoSometimes this condition is confused with hypokalemia.Calcium metabolismHypercalcaemia
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