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A nurse is caring for a client who reports chest pain. Which of the following laboratory findings indicates myocardial damage?

A.

Troponin 11.8 ng/mL

B.

Erythrocyte sedimentation rate (ESR) 17 mm/hr

C.

Human B-type natriuretic peptide 88 pg/ml.

D.

aPTT 80 seconds

Answer and Explanation

The Correct Answer is A

A.

A. Troponin is a protein released into the bloodstream when there is damage to the heart muscle (myocardium), such as during a heart attack. Elevated troponin levels indicate myocardial injury or damage, making this the correct choice for indicating myocardial damage.

B. Erythrocyte sedimentation rate (ESR) measures the rate at which red blood cells settle in a tube of blood. It is a non-specific marker of inflammation and is not specific to myocardial damage.

C. Human B-type natriuretic peptide (BNP) is released by the heart in response to increased pressure and volume. Elevated levels are indicative of heart failure, not necessarily myocardial damage.

D. Activated partial thromboplastin time (aPTT) measures the time it takes for blood to clot. It is used to monitor the effectiveness of anticoagulant therapy and is not specific to myocardial

damage.


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Related Questions

Correct Answer is A

Explanation

A.

A. Clear fluid drainage from the nares, especially if it is continuous or persistent, may indicate a cerebrospinal fluid (CSF) leak, which can occur with a skull fracture.

B. Pain around the eyes is more commonly associated with a nasal fracture or orbital fracture, rather than a skull fracture.

C. Dried blood in the mouth may indicate nasal bleeding but does not necessarily indicate a skull fracture.

D. Mandibular asymmetry may indicate a jaw fracture or injury but is not typically associated with a skull fracture.

Correct Answer is C

Explanation

A. Hydrogen peroxide is not recommended for cleaning surfaces contaminated with blood as it is not as effective as other agents and may not adequately disinfect surfaces.

B. Isopropyl alcohol can be effective for disinfecting surfaces contaminated with blood, but it is less effective against certain bloodborne pathogens like hepatitis B virus compared to chlorine bleach.

C. Chlorine bleach is an effective agent for cleaning surfaces contaminated with blood and is recommended by CDC guidelines for disinfecting against bloodborne pathogens.

D. Chlorhexidine is primarily used as a skin antiseptic and is not typically used for cleaning surfaces contaminated with blood.

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