A nurse is providing care for a client who experienced a myocardial infarction prior to a cardiac arrest. Which of the following laboratory tests will identify early injury to the cardiac muscle?

Creatine kinase (CK) test

Creatine kinase-myocardial band (CK-MB) test

Brain natriuretic peptide (BNP) test

Troponin T test

Answer and Explanation

The Correct Answer is D

A. Creatine kinase (CK) test: While creatine kinase isoenzymes, including CK-MB, can be elevated following myocardial infarction (MI), they are not specific to cardiac muscle injury. CK is found in various tissues throughout the body, so elevated levels can also indicate damage to skeletal muscle or brain tissue, among other sources.

B. Creatine kinase-myocardial band (CK-MB) test: CK-MB is a cardiac-specific isoform of creatine kinase, and elevated levels can indicate myocardial injury, particularly in the context of an acute MI. However, troponin T is a more sensitive and specific marker for myocardial injury.

C. Brain natriuretic peptide (BNP) test: Brain natriuretic peptide is primarily used in the diagnosis and management of heart failure. While elevated BNP levels can indicate heart muscle strain or stress, they are not specific markers for acute myocardial infarction or early injury to the cardiac muscle.

D. Troponin T test: This is the correct answer. Troponin T is a highly specific marker for cardiac muscle injury. Elevated troponin levels can be detected within hours of myocardial infarction and persist for several days, making it an essential tool in the diagnosis of acute coronary syndromes, including myocardial infarction. Troponin T is considered one of the gold standard biomarkers for detecting early injury to the cardiac muscle.

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Correct Answer is B

Explanation

A. Lower extremities edematous with decreased pulses and cool to the touch While this finding suggests impaired circulation associated with peripheral artery disease, it does not indicate an immediate need for intervention. However, it requires timely assessment and intervention to prevent further complications.

B. Pain, pallor, and paresthesia in the foot This finding indicates critical limb ischemia, which is a severe complication of peripheral artery disease requiring immediate intervention. Pain, pallor (pale color), and paresthesia (abnormal sensations like tingling or numbness) suggest inadequate blood flow to the affected limb, putting the client at risk for tissue damage and limb loss if not promptly addressed.

C. Murmur auscultated at the left 5th midclavicular line, slight dyspnea, and lower extremity edema These findings are suggestive of cardiac issues such as heart failure rather than immediate complications of peripheral artery disease. While they require attention, they do not signify an urgent need for intervention specific to peripheral artery disease.

D. Presence of an open wound near the ankle with serous drainage and pruritus While an open wound warrants assessment and appropriate wound care, it does not indicate an immediate need for intervention unless there are signs of infection or severe tissue damage. In this scenario, the presentation of pain, pallor, and paresthesia indicates a more urgent need for intervention to prevent tissue necrosis and limb loss.

A. Administer pain medication as needed. B. Maintain ventriculostomy at the correct position. C. Maintain the neck in the midline position. D. Elevate the head of the bed to 150. E. Maintain enteral feedings.

Correct Answer is ["A","B","C","D","E"]

Explanation

A. Administer pain medication as needed. Rationale: Pain management is essential for clients with traumatic brain injury (TBI) to ensure their comfort and to prevent agitation or increased intracranial pressure (ICP) due to pain. Administering pain medication as needed helps alleviate discomfort and promotes rest, which supports the client's recovery.

B. Maintain ventriculostomy at the correct position. Rationale: Ventriculostomy, also known as an external ventricular drain (EVD), is a critical component of managing intracranial pressure (ICP) in clients with traumatic brain injury. Maintaining the ventriculostomy at the correct position ensures accurate monitoring and drainage of cerebrospinal fluid (CSF), which helps control ICP levels and prevents complications such as cerebral edema.

C. Maintain the neck in the midline position. Rationale: Keeping the neck in a midline position is essential for clients with traumatic brain injury to prevent further injury to the cervical spine. Proper alignment of the neck helps maintain spinal stability and reduces the risk of exacerbating any existing spinal cord injury, which may coexist with the traumatic brain injury.

D. Elevate the head of the bed to 30 degrees. Rationale: Elevating the head of the bed to 30 degrees is recommended for clients with traumatic brain injury to promote cerebral venous drainage and reduce intracranial pressure (ICP). This position helps optimize cerebral perfusion and minimizes the risk of cerebral edema, which can occur with increased ICP.

E. Maintain enteral feedings. Rationale: Nutritional support is crucial for clients with traumatic brain injury to support healing and recovery. Enteral feedings, such as tube feedings, may be necessary if the client is unable to consume adequate nutrition orally due to impaired swallowing or altered consciousness. Providing enteral feedings ensures the client receives essential nutrients to support tissue repair and prevent malnutrition-related complications during the recovery process.

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A nurse is providing care for a client who experienced a myocardial infarction prior to a cardiac arrest. Which of the following laboratory tests will identify early injury to the cardiac muscle?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

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Correct Answer is B

Explanation

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Correct Answer is ["A","B","C","D","E"]

Explanation

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