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What is the diagnostic value of Chvostek's Sign in diagnosing hypocalcemia?
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Not very sensitive or specific, absent in about 30% of patients with hypocalcemia, and present in about 10% of patients with normal calcium levels.
Describe the muscle movements observed in Trousseau's Sign.
Gradual flexion of the fingers and thumb, flexion at the wrist, and some degree of pronation.
How is Trousseau's Sign induced?
By inflation of a blood pressure cuff over the arm, which leads to carpal pedal spasm.
Which sign demonstrates higher sensitivity and specificity in diagnosing hypocalcemia: Chvostek's Sign or Trousseau's Sign?
Trousseau's Sign
What is Chvostek's Sign?
Twitching of facial muscles in response to tapping over the facial nerve area.
What is the diagnostic value of Trousseau's Sign in diagnosing hypocalcemia?
More sensitive and specific compared to Chvostek's Sign, present in approximately 94% of patients with hypocalcemia, and occurs in about 1% of patients with normal calcium levels.
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