Nursing Elites

1. A patient with atrial fibrillation is prescribed warfarin. Which laboratory test should the nurse monitor to assess the effectiveness of the medication?

• A. Complete blood count (CBC)
• B. Prothrombin time (PT)/INR
• C. Partial thromboplastin time (PTT)
• D. Serum potassium level

Correct answer: B

Rationale: The correct answer is B: Prothrombin time (PT)/INR. Warfarin affects the clotting ability of the blood by inhibiting vitamin K-dependent clotting factors. Monitoring the prothrombin time (PT) and international normalized ratio (INR) is crucial to assess the effectiveness and safety of warfarin therapy. These tests help determine if the patient is within the desired anticoagulation range to prevent either clotting issues or excessive bleeding.

2. An elderly female client comes to the clinic for a regular check-up. The client tells the nurse that she has increased her daily doses of acetaminophen (Tylenol) for the past month to control joint pain. Based on this client's comment, what previous lab values should the nurse compare with today's lab report?

• A. Look at last quarter's hemoglobin and hematocrit to assess for dehydration.
• B. Look for an increase in today's LDH compared to the previous one to assess for possible liver damage.
• C. Expect to find an increase in today's APTT compared to last quarter's due to bleeding.
• D. Determine if there is a decrease in serum potassium due to renal compromise.

Correct answer: B

Rationale: When a client increases their daily doses of acetaminophen for joint pain, it raises concerns about possible liver damage due to acetaminophen overdose. LDH (Lactate Dehydrogenase) levels can indicate liver function, so comparing today's levels with previous ones can help assess for liver damage caused by acetaminophen overuse.

3. An elderly client with congestive heart failure (CHF) is admitted to the hospital. Which laboratory test result should the nurse expect to find?

• A. Elevated serum sodium level.
• B. Decreased brain natriuretic peptide (BNP) level.
• C. Increased serum creatinine level.
• D. Elevated hemoglobin and hematocrit levels.

Correct answer: C

Rationale: In clients with congestive heart failure (CHF), impaired cardiac function can lead to decreased renal perfusion, resulting in elevated serum creatinine levels. Therefore, an increased serum creatinine level is a common laboratory finding in CHF clients, indicating possible renal impairment.

4. A client is on a mechanical ventilator. Which client response indicates that the neuromuscular blocker tubocurarine chloride (Tubarine) is effective?

• A. The client's extremities are paralyzed.
• B. The peripheral nerve stimulator causes twitching.
• C. The client clenches fist upon command.
• D. The client's Glasgow Coma Scale score is 14.

Correct answer: A

Rationale: The correct answer is A. Tubocurarine chloride is a neuromuscular blocker that works by causing paralysis of skeletal muscles. Therefore, if the client's extremities are paralyzed, it indicates that the medication is effective in achieving the desired muscle relaxation necessary for mechanical ventilation. Choices B and C are incorrect as they suggest muscle activity, which would not be expected with the administration of a neuromuscular blocker. Choice D is unrelated to the effectiveness of tubocurarine chloride.

5. A 35-year-old woman presents with fatigue, weight gain, and cold intolerance. Laboratory tests reveal high TSH and low free T4 levels. What is the most likely diagnosis?

• A. Hypothyroidism
• B. Hyperthyroidism
• C. Thyroiditis
• D. Thyroid cancer

Correct answer: A

Rationale: The scenario describes a 35-year-old woman with symptoms of fatigue, weight gain, and cold intolerance along with high TSH and low free T4 levels. These findings are consistent with the diagnosis of hypothyroidism. In hypothyroidism, there is decreased thyroid hormone production leading to elevated TSH levels as the body tries to stimulate the thyroid to produce more hormone. The low free T4 levels indicate insufficient thyroid hormone in the blood, which can manifest as symptoms such as fatigue, weight gain, and cold intolerance.

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