Nursing Elites

1. Which of the following lab values is elevated first after a client has a myocardial infarction?

• A. LDH
• B. troponin
• C. CPK
• D. SGOT

Correct answer: B

Rationale: The correct answer is troponin. Troponin levels are the most specific and sensitive markers for myocardial infarction, and they begin to rise within a few hours after the event. CPK, SGOT, and LDH are also enzymes that can indicate myocardial damage, but troponin is the earliest and most specific indicator. CPK typically rises 4-8 hours after an infarction, followed by SGOT (AST) at 8-12 hours, and LDH at 12-24 hours post-infarction.

2. Which of the following isoenzymes is elevated in a client who has had a myocardial infarction?

• A. CPK-BB
• B. CPK-MM
• C. CPK-MB
• D. CPK-MI

Correct answer: C

Rationale: CPK-MB is the correct answer as it is elevated in clients who have had a myocardial infarction. CPK-BB is elevated in clients with brain damage, and CPK-MM is elevated in clients with skeletal muscle damage. CPK-MI, mentioned in the rationale, does not exist, making it an incorrect choice.

3. To ensure proper immobilization and increase client comfort when using a rigid splint, what should be done?

• A. Place the client on a stretcher before splinting.
• B. Place the client on a long spine board before splinting.
• C. Pad the spaces between the body part and the splint.
• D. Ensure that the splint conforms to the body curves.

Correct answer: C

Rationale: Correct. When using a rigid splint, it is essential to pad the spaces between the body part and the splint to ensure proper immobilization and increase client comfort. This padding helps prevent pressure points and ensures a proper fit of the splint without causing discomfort. Placing the client on a stretcher or a long spine board before splinting (choices A and B) may be necessary for transportation but does not directly relate to the proper use of a rigid splint. Ensuring that the splint conforms to the body curves (choice D) is important but not as crucial as padding the spaces to prevent discomfort and ensure proper immobilization.

4. A new mother asks the nurse, 'I was told that my infant received my antibodies during pregnancy. Does that mean that my infant is protected against infections?' Which statement should the nurse make in response to the mother?

• A. The immune system of an infant is immature, and the infant is at risk for infection.
• B. The transfer of your antibodies protects your infant until the infant is 12 months old.
• C. Yes, your infant is protected from all infections.
• D. If you breastfeed, your infant is protected from infection.

Correct answer: A

Rationale: The transplacental transfer of maternal antibodies supplements the infant's weak response to infection until approximately 3 to 4 months of age. While the infant starts producing immunoglobulin (Ig) soon after birth, it only reaches about 60% of the adult IgG level, 75% of the adult IgM level, and 20% of the adult IgA level by 1 year of age. Breast milk provides additional IgA protection. Although the immune system matures during infancy, full protection against infections is not achieved until early childhood, putting the infant at risk for infections. Choice B is incorrect because maternal antibody protection typically lasts around 3 to 4 months, not until the infant is 12 months old. Choice C is incorrect as infants are not shielded from all infections due to their immature immune system. Choice D is incorrect because while breastfeeding offers extra protection, it does not guarantee complete immunity against infections.

5. All of the following interventions should be performed when fetal heart monitoring indicates fetal distress except:

• A. Increase maternal fluids.
• B. Administer oxygen.
• C. Decrease maternal fluids.
• D. Turn the mother.

Correct answer: C

Rationale: When fetal heart monitoring indicates fetal distress, interventions are aimed at improving oxygenation to the fetus. Increasing maternal fluids helps improve placental perfusion and oxygen delivery to the fetus. Administering oxygen also aids in increasing oxygen supply to the fetus. Turning the mother can help relieve pressure on the vena cava, optimizing blood flow to the placenta. Therefore, decreasing maternal fluids would not be performed as it can further compromise placental perfusion and fetal oxygenation, making it the exception. Decreasing maternal fluids could potentially exacerbate fetal distress by reducing oxygen delivery and nutrient supply to the fetus, which is contrary to the goal of managing fetal distress.

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