The nurse is reviewing risk factors for cholelithiasis in a client’s history. Which factor most significantly increases the client’s risk for developing gallstones?

Choice A reason: Serum creatinine assesses kidney function, not cardiac injury. While relevant for overall health, it does not confirm myocardial infarction. Troponin is specific to cardiac muscle damage, making it the priority test to diagnose acute coronary events in the emergency setting.

Choice B reason: Troponin levels are the gold standard for diagnosing myocardial infarction, as they rise within hours of cardiac muscle injury due to ischemia. High specificity for heart tissue makes troponin critical for confirming acute coronary syndrome, guiding urgent treatment in the emergency department.

Choice C reason: Complete blood count evaluates anemia or infection but is nonspecific for myocardial infarction. While useful for overall assessment, it does not detect cardiac injury. Troponin directly indicates heart muscle damage, making it the priority test for confirming the diagnosis.

Choice D reason: Blood glucose may be elevated in stress or diabetes but is not diagnostic for myocardial infarction. Cardiac-specific markers like troponin are essential for confirming heart injury, as glucose levels lack specificity for acute coronary events, making them secondary.

Choice A reason: Obtaining an arterial blood gas assesses oxygenation and acid-base status, useful in COPD management, but is not required before postural drainage. This invasive procedure is unnecessary for routine drainage, which mobilizes secretions. Explaining positions prepares the client, enhancing cooperation and effectiveness.

Choice B reason: Performing drainage after meals risks aspiration or vomiting, as a full stomach increases intra-abdominal pressure in COPD patients. Postural drainage is most effective when performed on an empty stomach, making this approach incorrect. Patient education on positioning is the priority.

Choice C reason: Shallow, fast breathing is counterproductive in COPD, as it reduces tidal volume and worsens hypercapnia. Postural drainage requires slow, deep breaths to mobilize secretions and improve ventilation. Explaining positions ensures proper technique, making this breathing instruction incorrect.

Choice D reason: Explaining that the client may be placed in five positions (e.g., prone, supine, lateral) prepares them for postural drainage, which uses gravity to mobilize lung secretions in COPD. This education enhances compliance and effectiveness, as proper positioning is critical for therapeutic success, making it the correct approach.