A client is hospitalized for observation after suffering heat exhaustion during a marathon race. He complains of dizziness when he stands up, and the RN determines that he has postural hypotension. Based on the information, which of the following electrolyte imbalances could cause the client's symptoms?

Choice A reason: Weight-bearing exercise, such as walking, jogging, or dancing, helps to strengthen the bones and prevent osteoporosis. It also improves muscle strength, balance, and coordination, which can reduce the risk of falls and fractures.

Choice B reason: Having a bone density scan every year is not necessary for a young adult client who has a family history of osteoporosis. A bone density scan is a test that measures the amount of calcium and other minerals in the bones. It is usually recommended for women over 65 years old, men over 70 years old, or people who have risk factors for osteoporosis, such as low body weight, smoking, or steroid use.

Choice C reason: Taking a magnesium supplement every day is not a proven way to prevent osteoporosis. Magnesium is a mineral that is involved in bone formation and metabolism, but there is not enough evidence to support its role in preventing or treating osteoporosis. A balanced diet that includes foods rich in calcium, vitamin D, and other nutrients is more effective for bone health.

Choice D reason: Drinking a cup of coffee every morning is not a good idea for a young adult client who has a family history of osteoporosis. Coffee contains caffeine, which can interfere with the absorption of calcium and increase the excretion of calcium in the urine. This can lead to lower bone density and higher risk of osteoporosis. Moderate coffee consumption (one or two cups per day) may not have a significant effect on bone health, but excessive coffee intake (more than four cups per day) should be avoided.

Choice A reason: An open wound is a concern for a diabetic client, as it can increase the risk of infection and delay the healing process. However, it does not require an immediate focused assessment, unless it is bleeding profusely, infected, or showing signs of tissue damage.

Choice B reason: Depression is a common complication of diabetes, as it can affect the client's mood, self-care, and adherence to treatment. However, it does not require an immediate focused assessment, unless the client is suicidal, psychotic, or unable to function.

Choice C reason: Chest pain is a symptom that can indicate a life-threatening condition, such as a heart attack, pulmonary embolism, or aortic dissection. It requires an immediate focused assessment, as it can compromise the client's cardiac and respiratory function and lead to death.

Choice D reason: Diabetes is a chronic condition that affects the client's blood glucose levels and can cause various complications, such as neuropathy, nephropathy, and retinopathy. However, it does not require an immediate focused assessment, unless the client is experiencing a hyperglycemic or hypoglycemic crisis.