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Guidelines for Complications of Cancer Treatment Vol VIII Part B

Guidelines for Complications of Cancer Treatment Vol VIII Part B

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Hypocalcemia FollowingThyroidectomyHypocalcaemia is the presence <strong>of</strong> low serum calcium levelsin the blood, usually taken as less than 2.1 mmol/L or 9 mg/dLor an ionized calcium level <strong>of</strong> less than 1.1 mmol/L or 4.5 mg/dL. This is a result <strong>of</strong> hupoparathyroidism due to decreasedfunctioning <strong>of</strong> parathyroid glaandsPostoperative hypocalcaemia can be transient or permanent,the latter when the duration <strong>of</strong> hypocalcaemia is more than6months postoperative.EtiologyVascular damageDirect TraumaInadvertent or intended removal <strong>of</strong> parathyroid glands duringsurgery.IncidenceTransient – 0.6-83%- probably because <strong>of</strong> reversible ischaemiato the glandsPermanent – 1-6% (usually

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