The nurse is using Chvostek sign to assess for hypocalcemia. Which statement correctly describes this test?

Tap the face just below and in front of the ear.

Inflate a blood pressure cuff around the upper arm for 4 minutes.

Apply pressure over the ulnar and radial arteries.

Forcefully dorsiflex the ankle when the knee is in an extended position.

Answer and Explanation

The Correct Answer is A

A. Tap the face just below and in front of the ear: This is the correct technique for eliciting Chvostek’s sign, which involves tapping over the facial nerve. A positive sign (twitching of facial muscles) indicates hypocalcemia.

B. Inflate a blood pressure cuff around the upper arm for 4 minutes: This describes Trousseau’s sign, another test for hypocalcemia, where carpopedal spasm occurs due to ischemia.

C. Apply pressure over the ulnar and radial arteries: This describes Allen’s test, used to assess arterial blood flow, not calcium levels.

D. Forcefully dorsiflex the ankle when the knee is in an extended position: This describes Homan’s sign, which is used to assess for deep vein thrombosis (DVT), not hypocalcemia.

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Correct Answer is C

Explanation

A. Urine output 20 mL/hr: A urine output of 20 mL/hr is on the low side but can still be expected in dehydration, as the body attempts to conserve water. Normal urine output is 30 mL/hr or more, so this could still be a sign of dehydration.

B. Sodium 142 mEq/L (136 to 145 mEq/L): This sodium level is within the normal range. Dehydration may cause sodium to be elevated if water loss is more significant than sodium loss, but a normal value does not indicate dehydration.

C. Cool skin: Cool skin is a typical finding in dehydration, particularly in severe cases, due to reduced peripheral circulation and vasoconstriction as the body tries to maintain core temperature and blood pressure.

D. Bradycardia: Dehydration usually causes tachycardia as a compensatory mechanism to maintain blood pressure and perfusion, not bradycardia.

A. "Adding pecans will be a change I can readily make." B. "I will eat cantaloupe for my morning snack." C. "I will miss eating yogurt every day for breakfast." D. "I can plan to eat rice instead of baked potatoes."

Correct Answer is B

Explanation

A. "Adding pecans will be a change I can readily make.": Pecans are not a significant source of potassium compared to other foods.

B. "I will eat cantaloupe for my morning snack.": Cantaloupe is a potassium-rich food and an excellent choice to increase dietary potassium.

C. "I will miss eating yogurt every day for breakfast.": Yogurt is a good potassium source, so discontinuing it would not help.

D. "I can plan to eat rice instead of baked potatoes.": Rice is low in potassium, whereas baked potatoes are a potassium-rich option.

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The nurse is using Chvostek sign to assess for hypocalcemia. Which statement correctly describes this test?

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Naxlex Comprehensive Predictor Exams

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Correct Answer is C

Explanation

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Correct Answer is B

Explanation

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