Chvostek Sign - Hypocalcemia

Classical Clinical Clip
Chvostek sign - due to increased irritability of the facial nerve, twitching of the ipsilateral facial muscles on percussion over the branches of the facial nerve.
This is a sign of hypocalcemia, commonly seen after thyroidectomy, when there is damage to parathyroid glands.

Video contribution: Dr.Yatheendra, Consultant Surgeon, Bengaluru.

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[faraz]

At what calcium level does this appear?

[pandzior]

I have chvostek sign but my calcium levels are fine? Why??