A nurse is teaching a client who has pericarditis. Which of the following statements should the nurse include in the client teaching to explain the cause of pericarditis?

A. "Blood flow is altered and causes blood to pool in the legs." This statement inaccurately describes venous insufficiency rather than peripheral arterial disease (PAD). In PAD, blood flow is reduced or obstructed due to atherosclerosis, leading to inadequate oxygen supply to tissues rather than pooling of blood in the legs.

B. "Blood flow is altered due to atherosclerosis affecting the tissues' ability to receive oxygen-rich blood." This statement correctly explains the underlying pathology of peripheral arterial disease (PAD). Atherosclerosis, characterized by the buildup of plaque in the arteries, narrows or blocks blood flow, impairing the delivery of oxygen-rich blood to the tissues. This can result in symptoms such as pain, cramping, and tissue damage, especially during activity when oxygen demand increases.

C. "Blood flow is altered due to incompetent valves causing increased venous pressure." This statement describes venous insufficiency rather than PAD. In venous insufficiency, faulty valves in the veins result in increased venous pressure, leading to symptoms such as swelling, heaviness, and varicose veins, but it does not involve arterial obstruction as seen in PAD.

D. "Blood flow is altered due to excessive stretching of the ventricles impairing the heart to contract." This statement describes a condition related to the heart's function rather than peripheral arterial disease. Excessive stretching of the ventricles may occur in conditions such as heart failure, but it does not directly affect blood flow in the peripheral arteries as seen in PAD.

A. "I can't see anything from the sides of my eyes." This statement suggests a visual field deficit, which may be indicative of conditions affecting peripheral vision, such as glaucoma, retinal detachment, or optic nerve disorders. It is not a typical symptom of cataracts.

B. "My vision is almost gone from the center part of my eye." This statement indicates a central visual impairment, which is a common symptom of cataracts. Cataracts cause clouding of the lens, leading to blurred or dimmed vision, especially in the center of the visual field. This symptom often progresses gradually over time.

C. "My contact lenses just don't fit like they used to." This statement suggests discomfort or fit issues with contact lenses and is not specifically indicative of cataracts. It may be related to changes in the shape or health of the cornea, conjunctiva, or tear film.

D. "I keep seeing flashes of lights moving around in my eye." Flashes of light in the visual field are not typical symptoms of cataracts. They may indicate other ocular conditions such as vitreous detachment, migraines with aura, or retinal disorders.