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Pulmonary embolism is life-threatening. The immediate action is to optimize oxygenation by positioning the client upright and administering supplemental oxygen. Option A is correct. Option B may confirm diagnosis but should not delay emergency supportive care. Option C is contraindicated, as ambulation may worsen clot dislodgement. Option D treats symptoms but ignores the underlying crisis. The PN acts promptly, monitors vitals, stays with the client, and notifies the RN/provider. This aligns with Physiological Integrity—Reduction of Risk Potential and Physiological Adaptation, requiring rapid recognition of emergent conditions.

Chest pain suggests cardiac ischemia and requires immediate evaluation. The other clients are stable or routine. This reflects Safe and Effective Care Environment—Prioritization of Care.

Cloudy, foul urine suggests infection. The PN should notify the RN/provider for cultures or treatment orders. Independent irrigation or removal is outside PN role without prescription. Documentation without reporting delays intervention. This reflects Safe and Effective Care Environment—Safety and Infection Control.

Chest pain may indicate myocardial ischemia or infarction, requiring immediate attention. Options A, C, and D are important but not life-threatening. This demonstrates prioritization of care under Safe and Effective Care Environment—Management of Care.

Severe hypokalemia increases risk of arrhythmias and requires immediate correction. The other findings are expected or normal. This reflects Physiological Integrity—Pharmacological and Parenteral Therapies.