NCLEX Readiness Practice Test

In this scenario, the patient with a creatine kinase level of 30,000 U/L is the most critical finding that the nurse should report to the healthcare provider first. Creatine kinase (CK) is an enzyme found in various tissues throughout the body, particularly in the heart, brain, and skeletal muscle. Elevated levels of CK, especially to such an extreme degree, can indicate severe muscle damage, such as rhabdomyolysis or acute myocardial infarction. This level is alarmingly high and suggests a potential medical emergency that requires immediate intervention.

In contrast, a white blood cell count of 12,000/mm³ is slightly elevated but, depending on the clinical context, may not necessitate immediate action. A creatinine level of 3.6 mg/dL indicates impaired kidney function, which is significant, but it may allow some time for intervention, particularly if other parameters are stable. A BNP level of 600 pg/mL indicates heart failure exacerbation, but this does not carry the same immediate risk as the extremely elevated CK level, which can lead to severe complications, including kidney failure or cardiac issues if not addressed promptly. Thus, the situation presented by the CK level is the most urgent, warranting immediate reporting and