A nurse is caring for a client who has myasthenia gravis. The nurse should recognize that this disease is caused by which of the following types of hypersensitivities?

Planning to slow down if tired the day after exercising is a statement that indicates the client understands the importance of pacing activities and avoiding overexertion, which can worsen heart failure symptoms.

a. "I should use naproxen to manage discomfort." is not correct, as naproxen is a nonsteroidal anti-inflammatory drug (NSAID) that can cause fluid retention, increase blood pressure, and worsen heart failure. The client should avoid NSAIDs and use other analgesics, such as acetaminophen, unless contraindicated.

c. "I will read food labels and limit my sodium to 4 grams per day." is not appropriate, as 4 grams of sodium per day is too high for a client who has congestive heart failure. The client should limit sodium intake to 2 grams or less per day, as sodium can cause fluid retention and increase the workload of the heart.

d. "I will take my diuretic before sleep and drink fluids during the day." is not advisable, as taking a diuretic before sleep can cause nocturia and disrupt the sleep cycle, which can affect the quality of life and cardiac function. The

Hypokalemia is a low serum potassium level, usually below 3.5 mEq/L. It can be caused by diuretics that increase potassium excretion, such as thiazides or loop diuretics. Potassium is essential for normal muscle and nerve function, and hypokalemia can impair cardiac, skeletal, and smooth muscle activity. Symptoms of hypokalemia include fatigue, weakness, muscle cramps, arrhythmias, constipation, and hyporeflexia.

1. Dyspnea is difficulty or labored breathing that can be caused by various respiratory or cardiac conditions, such as asthma, pneumonia, pulmonary edema, or heart failure. It is not a specific sign of hypokalemia, although severe hypokalemia can affect respiratory muscle function and cause respiratory failure.
2. Oliguria is a reduced urine output, usually less than 400 mL per day or 30 mL per hour. It can be caused by various renal or fluid balance disorders, such as acute kidney injury, dehydration, or shock. It is not a specific sign of hypokalemia, although severe hypokalemia can impair renal function and cause renal failure.
3. Pitting edema is a swelling of the tissues that leaves an indentation when pressed with a finger. It can be caused by various fluid retention disorders, such as heart failure, liver cirrhosis, or nephrotic syndrome. It is not a specific sign of hypokalemia, although severe hypokalemia can affect fluid and electrolyte balance and cause edema.