A nurse is teaching a client about foods and beverages that can cause diarrhea. Which of the following should the nurse include in the teaching?

Choice A reason: Hypernatremia is a condition of high sodium levels in the blood. It can cause symptoms such as thirst, dry mouth, confusion, agitation, and seizures. It is not likely to cause postural hypotension, which is a drop in blood pressure when changing positions.

Choice B reason: Hyponatremia is a condition of low sodium levels in the blood. It can cause symptoms such as headache, nausea, vomiting, muscle weakness, fatigue, and confusion. It can also cause postural hypotension, as sodium helps regulate fluid balance and blood pressure.

Choice C reason: Hyperkalemia is a condition of high potassium levels in the blood. It can cause symptoms such as muscle weakness, paralysis, irregular heartbeat, and cardiac arrest. It is not likely to cause postural hypotension, which is more related to fluid and sodium levels.

Choice D reason: Hypokalemia is a condition of low potassium levels in the blood. It can cause symptoms such as muscle cramps, weakness, fatigue, constipation, and arrhythmias. It is not likely to cause postural hypotension, which is more related to fluid and sodium levels.

Choice A reason: Fluid volume deficit is a condition in which the body loses more fluid than it gains, resulting in dehydration, hypotension, and electrolyte imbalances. It is not a complication of IV fluid therapy, but rather a reason for initiating it.

Choice B reason: Fluid volume excess is a condition in which the body retains more fluid than it needs, resulting in edema, hypertension, and heart failure. It is a potential complication of IV fluid therapy, especially in older adults who have reduced renal function and cardiac output. The nurse's assessment findings of crackles, shortness of breath, and jugular vein distention are indicative of fluid overload and pulmonary congestion.

Choice C reason: Speed shock is a systemic reaction that occurs when a substance is administered too rapidly into the bloodstream, causing adverse effects such as chest pain, dyspnea, hypotension, and cardiac arrest. It is not a complication of IV fluid therapy, but rather a risk associated with IV medication administration.

Choice D reason: Pulmonary embolism is a blockage of one or more pulmonary arteries by a blood clot, fat, or air, causing impaired gas exchange, chest pain, dyspnea, and hemoptysis. It is not a complication of IV fluid therapy, but rather a possible outcome of venous thromboembolism, which can be prevented by using anticoagulants and mechanical devices.