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?

A. Diminished breath sounds: A pneumothorax occurs when air accumulates in the pleural space, leading to lung collapse. This results in reduced air entry, causing diminished or absent breath sounds on the affected side. Other symptoms may include dyspnea, tachypnea, and chest pain.

B. Distended neck veins: Neck vein distention is more commonly associated with conditions such as cardiac tamponade or superior vena cava syndrome. A pneumothorax typically causes respiratory distress rather than venous congestion. If a tension pneumothorax develops, neck vein distention may occur, but it is not an early or primary sign.

C. Irregular heart rate: While severe cases of pneumothorax can cause cardiovascular compromise due to pressure on the heart and great vessels, an irregular heart rate is not a direct or early indicator. Cardiac arrhythmias are more often seen with electrolyte imbalances, cardiac ischemia, or other primary heart conditions.

D. Itching over the incision: Itching at the catheter insertion site is a common postoperative reaction, often related to healing, adhesive irritation, or mild inflammation. It is not indicative of a pneumothorax, which primarily presents with respiratory distress and absent or diminished breath sounds.

• Open wound on right foot with purulent drainage: A non-healing wound with purulent drainage suggests infection, which is a major concern in clients with hyperglycemia. Poor wound healing is common in diabetes due to impaired circulation and immune function.
• Frequent urination, increased thirst, and unexplained 4.5 kg (10 lb) weight loss: Classic symptoms of hyperglycemia and possible diabetes mellitus. Polyuria and polydipsia result from osmotic diuresis due to high blood glucose levels, while unexplained weight loss may indicate the body breaking down fat and muscle for energy.
• Temperature 38.3° C (100.9° F): Fever indicates a possible systemic infection. In diabetic clients, infections can progress rapidly and lead to complications such as cellulitis, osteomyelitis, or sepsis.
• Heart rate 104/min: Tachycardia may be a response to fever, dehydration, or underlying infection. Persistent tachycardia could indicate worsening sepsis or hemodynamic instability.
• Blood pressure 98/74 mm Hg: While not critically low, this blood pressure is on the lower end and could indicate early signs of dehydration from polyuria or systemic infection.
• Blood glucose 250 mg/dL: Significantly elevated blood glucose suggests poor glycemic control, increasing the risk of infection, delayed wound healing, and diabetic ketoacidosis (DKA) if it continues to rise.:

• Respiratory rate 18/min: A normal respiratory rate does not indicate respiratory distress or metabolic compensation.
• Oxygen saturation 97% on room air: Oxygenation is within the normal range, suggesting no immediate hypoxia.
• WBC count 9,500/mm³: Within the normal range, although an infection may still be present given the fever and purulent wound drainage.
• Triiodothyronine (T3) 200 mg/dL: Within normal limits, ruling out thyroid dysfunction as a cause of symptoms.
• BMI 27: Slightly overweight but not directly contributing to the acute condition.