Nursing Elites

1. The renin-angiotensin-aldosterone system plays an important role in maintaining blood pressure. Which compound in this system is most powerful at raising blood pressure?

• A. Angiotensin I
• B. Angiotensin II
• C. Angiotensin III
• D. Renin

Correct answer: B

Rationale: Angiotensin II is the most potent compound in the renin-angiotensin-aldosterone system for raising blood pressure. It acts as a powerful vasoconstrictor, leading to increased systemic vascular resistance. Angiotensin II is formed from angiotensin I through the action of the angiotensin-converting enzyme. While renin initiates the cascade by converting angiotensinogen to angiotensin I, it is angiotensin II that exerts the strongest pressor effect.

2. For which patient diagnosis would a prescription for nifedipine be least appropriate?

• A. Angina Pectoris
• B. Essential HTN
• C. Atrial Fibrillation
• D. Vasospastic Angina

Correct answer: C

Rationale: Nifedipine primarily acts as a calcium channel blocker, exerting its effects on vascular smooth muscle. It is not effective for treating dysrhythmias like Atrial Fibrillation, which involve abnormalities in the heart's electrical system. Nifedipine is commonly prescribed for conditions such as angina pectoris, essential hypertension, and vasospastic angina due to its vasodilatory and anti-anginal properties. Choices A, B, and D are more appropriate as nifedipine can help in managing angina pectoris, hypertension, and vasospastic angina by reducing myocardial oxygen demand and dilating coronary arteries.

3. A child receives a vaccine for MMR. Six hours after the injection, the child�s parent reports local soreness, erythema, lethargy, and a fever of 101�F to a nurse. Which action should the nurse take?

• A. Give instructions on relieving symptoms with acetaminophen
• B. Seek emergency help, because these symptoms are signs of anaphylactic reaction
• C. Tell the parent that a live vaccine will cause a mild case of measles
• D. Obtain and fill out a Vaccine Adverse Event Report form

Correct answer: A

Rationale: Low-grade fever, malaise, and muscle aches are common reactions. Acetaminophen usually alleviates these problems. MMR is a live vaccine but it is attenuated or completely avirulent and does not cause measles in healthy children, only immunocompromised children.

4. A child is being treated for dehydration with intravenous fluids. The child currently weighs 13 kg and is estimated to have lost 7% of his normal body weight. The nurse is double-checking the IV rate the healthcare provider prescribed. The formula the healthcare provider used was for maintenance fluids: 1000 mL for 10 kg of body weight plus 50 mL for every kilogram over 10 for 24 hours. Replacement fluid is the percentage of lost body weight � 10 per kg of body weight. According to the calculation for maintenance plus replacement fluid, which hourly IV rate will the nurse implement for 24 hours?

• A. 88 mL/hr
• B. 86 mL/hr
• C. 81 mL/hr
• D. 83 mL/hr

Correct answer: B

Rationale: For 13 kg, the maintenance fluid is 1150 mL (1000 mL for first 10 kg + 3*50 mL for the remaining 3 kg). Replacement fluid is 910 mL (0.07 * 13000 mL). Total fluid is 2060 mL, divided by 24 hours is 86 mL/hr.

5. Which of the following is a key feature of the diagnosis of ASD according to the DSM V?

• A. Unusual responses to sensory input
• B. Social isolation
• C. Repetitive behaviors
• D. Delayed motor development

Correct answer: A

Rationale: In the DSM V, one of the key diagnostic criteria for Autism Spectrum Disorder (ASD) is unusual responses to sensory input. These atypical responses can include hypersensitivity or hyposensitivity to sensory stimuli, such as sound, touch, taste, or smell. These sensory processing differences are important in the diagnosis of ASD because they can significantly impact an individual's daily functioning and behavior. Social isolation and repetitive behaviors are associated features of ASD but are not the key diagnostic criteria according to the DSM V. Delayed motor development may be observed in some individuals with ASD, but it is not a key feature used for diagnosis in the DSM V.

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