https://wikem.org/w/index.php?action=history&feed=atom&title=Calcium 2026-04-18T01:18:15Z Revision history for this page on the wiki MediaWiki 1.38.2 https://wikem.org/w/index.php?title=Calcium&diff=388746&oldid=prev 2026-03-22T06:58:07Z

<p>Create lab page for Calcium with EM-focused content and references</p> <p><b>New page</b></p><div>==Background==<br /> *Essential for cardiac conduction, muscle contraction, coagulation, and bone metabolism<br /> *Total calcium is ~50% protein-bound; [[ionized calcium]] is the physiologically active form<br /> <br /> ==Normal Values==<br /> *Total calcium: 8.5-10.5 mg/dL<br /> *Corrected calcium = total Ca + 0.8 x (4.0 - albumin)<br /> *See [[ionized calcium]] for direct measurement<br /> <br /> ==Interpretation==<br /> *Always correct for albumin or check ionized calcium in hypoalbuminemic patients<br /> *Hypercalcemia (&gt;10.5 mg/dL): malignancy and hyperparathyroidism account for ~90% of cases<br /> **Symptoms: &quot;stones, bones, groans, and psychiatric overtones&quot;<br /> **Treat with IV NS (first-line), calcitonin, bisphosphonates<br /> **ECG: shortened QT interval<br /> *Hypocalcemia (&lt;8.5 mg/dL): most commonly from hypoalbuminemia (check ionized Ca), also renal failure, hypoparathyroidism, vitamin D deficiency<br /> **Symptoms: perioral/extremity paresthesias, tetany, Chvostek and Trousseau signs, seizures<br /> **ECG: prolonged QT interval<br /> <br /> ==See Also==<br /> *[[Hypercalcemia]]<br /> *[[Hypocalcemia]]<br /> *[[Ionized calcium]]<br /> *[[BMP]]<br /> <br /> ==References==<br /> &lt;references/&gt;<br /> <br /> [[Category:Labs]]</div>

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