which of the following lab values is elevated first after a client has a myocardial infarction

NCLEX-PN

Nclex Questions Management of Care

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. What type of injury is associated with acute hyphema?

A. orthopedic
B. eye
C. insect sting or snakebite
D. gynecological trauma

Correct answer: B

Rationale: Acute hyphema is associated with an eye injury, typically resulting from blunt trauma. The presence of blood in the anterior chamber of the eye causes a half-moon appearance or a horizontal line across the globe when the client is upright. Choices A, C, and D are incorrect because acute hyphema is not related to orthopedic injuries, insect stings, snakebites, or gynecological trauma.

3. When are standard walkers typically used?

A. When clients have poor balance, cannot stand up, have weak arms, and good hand strength.
B. When clients have poor balance, have a broken leg, or have experienced amputation.
C. When clients have poor balance, have cardiac problems, or cannot use crutches or a cane.
D. When clients have poor balance, have an autoimmune disease, or have weak arms.

Correct answer: C

Rationale: Standard walkers are typically used for clients who have poor balance, cardiac problems, or those who cannot use crutches or a cane. The rationale is correct in stating that a walker is suitable for individuals needing to bear partial weight and having strength in their wrists and arms to propel the walker forward. Choices A, B, and D are incorrect because they do not accurately reflect the main reasons why standard walkers are used in clinical practice. Using a walker is not solely about having weak arms, good hand strength, a broken leg, experienced amputation, or an autoimmune disease. The primary focus is on addressing balance issues, cardiac problems, or the inability to use crutches or a cane effectively.

4. While preparing a client for a bronchoscopy, a nurse notes that the client is wearing a gold necklace. What should the nurse do to safeguard the client's necklace?

A. Ask the client for permission to lock the necklace in the hospital safe
B. Ask the client to remove the necklace and place it in the top drawer of the bedside table
C. Ask the client whether the necklace is gold
D. Ask the client to sign a release to free the hospital of responsibility if the necklace is damaged or lost during the procedure

Correct answer: A

Rationale: When a client has valuables such as jewelry, the nurse should ensure their safekeeping. It is appropriate for the nurse to ask the client for permission to lock the necklace in the hospital safe to prevent loss or damage. This option prioritizes the security of the necklace while allowing the client to make an informed decision. Asking the client to sign a release form does not guarantee the necklace's safety; it only releases the hospital from liability. Placing the necklace in a bedside table drawer does not provide adequate security as it is not as secure as a hospital safe. Inquiring whether the necklace is gold is irrelevant to safeguarding the jewelry during the procedure, as the primary concern is its safekeeping.

5. Which isolation procedure will be followed for secretions and blood?

A. Respiratory Isolation
B. Standard Precautions
C. Contact Isolation
D. Droplet Isolation

Correct answer: B

Rationale: The correct answer is Standard Precautions. Standard precautions are taken in all situations for all clients and involve all body secretions except sweat. They are designed to reduce the rate of transmission of microbes from one host to another or one source to another. Respiratory Isolation (Choice A) is used for diseases transmitted by airborne particles, not secretions and blood. Contact Isolation (Choice C) is for clients known or suspected to be infected with microorganisms that can be transmitted by direct or indirect contact. Droplet Isolation (Choice D) is used for diseases transmitted by large respiratory droplets expelled during coughing, sneezing, talking, or procedures.