A nurse is providing preventive education to a client who has diabetes mellitus. Which of the following statements made by the client indicates they understand proper foot care?

• Infection: Poor glycemic control, indicated by an elevated hemoglobin A1c of 9.5%, leads to impaired immune function, delayed wound healing, and increased risk of postoperative infections. Chronic hyperglycemia promotes bacterial growth, reduces leukocyte function, and compromises vascular integrity, further predisposing the client to infections.
• Deep vein thrombosis (DVT): Postoperative immobility, increased coagulation, and endothelial injury increase DVT risk. However, BUN of 15 mg/dL is within the normal range and does not indicate dehydration or hemoconcentration, which would contribute to thrombus formation.
• Hypovolemia: Reduced blood volume typically presents with signs such as hypotension, tachycardia, and elevated BUN/creatinine ratio. Preoperative hypertension does not indicate hypovolemia and is more commonly associated with chronic vascular resistance rather than acute fluid loss.
• BUN of 15 mg/dL: A BUN level within the normal range does not suggest an increased risk for DVT or fluid imbalance. It primarily reflects renal function and hydration status, neither of which are significantly altered in this case.
• Preoperative hypertension: While chronic hypertension is a cardiovascular risk factor, it does not indicate hypovolemia, which would present with dehydration-related signs such as orthostatic hypotension, tachycardia, and decreased urine output.
• Hemoglobin A1c: A value of 9.5% indicates poor long-term glycemic control, which impairs immune function and slows wound healing. Elevated glucose levels reduce neutrophil function, impair macrophage activity, and increase oxidative stress, all of which contribute to a heightened infection risk.

The nurse should first address the client's chest pain followed by the client's irregular heart rate.

Rationale:

Chest pain is the priority concern as it indicates an acute coronary event (ST-elevation myocardial infarction, STEMI). Immediate interventions such as oxygen, nitroglycerin, and pain management are required to reduce myocardial oxygen demand and prevent further cardiac damage.

Irregular heart rate must be addressed next, as tachycardia and arrhythmias can increase myocardial workload and worsen ischemia. Monitoring and possible antiarrhythmic interventions may be required to stabilize cardiac function.

Incorrect:

Troponin levels: Elevated troponin confirms myocardial injury but does not require immediate intervention; managing the ongoing ischemia is the priority.

Oxygen saturation: The client's oxygen saturation is 93% on room air, which is adequate. Oxygen therapy is not the first priority unless levels drop further.

Hyperlipidemia: While a cardiovascular risk factor, it is not an acute concern during an MI. Long-term management is necessary but not the immediate priority.

C-reactive protein: Elevated CRP indicates inflammation but does not require urgent intervention in the acute phase of MI.