An older adult is brought to the emergency department by a family member, who reports a moderate change in mental status and mild cough.

The client is afebrile.

The primary healthcare provider orders a chest x-ray.

The family member asks why this is needed since the symptoms seem so vague.

What response by the nurse is best?

Choice A rationale

Tachypnea, or rapid breathing, significantly increases insensible fluid loss through the respiratory tract. Each exhalation carries water vapor, and with increased respiratory rate and depth, the total volume of water lost through respiration can be substantial, leading to dehydration despite oral fluid intake. This explains the physiological mechanism of fluid imbalance related to respiratory effort.

Choice B rationale

While pneumonia can be associated with dehydration due to fever, decreased oral intake, and increased metabolic demands, stating that "everyone with pneumonia is dehydrated" is an overgeneralization and not scientifically accurate. The degree of dehydration varies among individuals based on their specific physiological response and hydration status.

Choice C rationale

While intravenous fluids are often used to administer antibiotics, the client specifically asked about dehydration despite drinking water. This response avoids directly addressing the client's concern and the physiological reason for their dehydration, missing an opportunity for client education regarding their condition.

Choice D rationale

This response is a therapeutic communication technique, but in this specific scenario, the client is directly asking for a scientific explanation of their dehydration. Responding with another question shifts the burden of explanation back to the client and does not provide the requested physiological information, which is critical for their understanding and adherence. .

Choice A rationale

Cystic fibrosis (CF) is a genetic disorder affecting exocrine glands, leading to thick, viscous secretions, particularly impacting the pancreas. This impairs the release of digestive enzymes, causing malabsorption of fats, proteins, and fat-soluble vitamins. Administering pancreatic enzymes with meals and snacks supplements the deficient endogenous enzymes, facilitating nutrient digestion and absorption, which is crucial for growth and development in children with CF.

Choice B rationale

Individuals with cystic fibrosis often lose excessive amounts of salt through their sweat due to a defect in the cystic fibrosis transmembrane conductance regulator (CFTR) protein, which regulates chloride and sodium transport. Restricting salt in their diet can exacerbate hyponatremia and dehydration, especially during illness or hot weather. Therefore, salt supplementation is often recommended, not restriction, to maintain electrolyte balance.

Choice C rationale

Cystic fibrosis patients, particularly children, are prone to dehydration due to increased insensible fluid losses through the respiratory tract (thick mucus) and elevated sweat electrolyte concentrations. Restricting fluid intake would further worsen dehydration, increase mucus viscosity, and impair mucociliary clearance, potentially leading to more frequent pulmonary exacerbations and overall decline in health. Adequate hydration is crucial.

Choice D rationale

Children with cystic fibrosis experience significant malabsorption, leading to malnutrition and growth failure, largely due to pancreatic enzyme insufficiency. They require a high-calorie, high-protein, and high-fat diet to compensate for malabsorption and meet their increased metabolic demands. Limiting fat and protein would further compromise their nutritional status, hindering growth and overall health.