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A nurse is collecting data about the fluid status of four patients.
Which patient should the nurse identify as being at risk for fluid volume deficit?

A patient who has heart failure and is receiving diuretic therapy.

A patient who has gastroenteritis and is receiving oral fluids.

A patient who has end-stage kidney disease who will undergo dialysis.

A patient who has NPO status since midnight for an endoscopy.

Answer and Explanation

The Correct Answer is D

Rationale for Choice A:

Diuretics promote fluid loss, increasing the risk of fluid volume deficit.

Heart failure can lead to fluid retention, but diuretic therapy is often used to manage this excess fluid.

However, in this case, the patient is receiving diuretic therapy, which suggests that their fluid status is being actively managed.

Therefore, while this patient is at risk for fluid volume deficit, they are not the most likely candidate among the options presented.

Rationale for Choice B:

Gastroenteritis can lead to fluid loss through vomiting and diarrhea.

However, this patient is receiving oral fluids, which helps to replenish lost fluids and electrolytes.

As long as the patient is able to tolerate oral fluids and is not experiencing excessive fluid losses, they are not at significant risk for fluid volume deficit.

Rationale for Choice C:

End-stage kidney disease can impair the kidneys' ability to regulate fluid balance.

However, dialysis is a treatment that helps to remove excess fluid and waste products from the body.

Therefore, while this patient is at risk for fluid volume imbalances, they are receiving treatment to manage this risk.

Rationale for Choice D:

NPO status means that the patient has been instructed to have nothing by mouth. This means that the patient has not been able to consume any fluids since midnight.

Even in the absence of excessive fluid losses, this prolonged period of fluid restriction can lead to dehydration and fluid volume deficit.

Therefore, this patient is the most likely to be experiencing fluid volume deficit among the options presented.

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Correct Answer is B

Explanation

Choice A rationale:

Metabolic alkalosis is characterized by a high pH (above 7.45), high bicarbonate (HCO3-) levels, and normal or low PaCO2. The patient's ABGs show a low pH (7.26), low bicarbonate (14 mEq/L), and low PaCO2 (30 mm Hg), which are not consistent with metabolic alkalosis.

Choice C rationale:

Respiratory alkalosis is characterized by a high pH (above 7.45), low PaCO2, and normal or slightly elevated bicarbonate levels. The patient's ABGs do show a low PaCO2, but the pH is low (acidic) and the bicarbonate is low, which are not consistent with respiratory alkalosis.

Choice D rationale:

Respiratory acidosis is characterized by a low pH (below 7.35), high PaCO2, and normal or slightly elevated bicarbonate levels. The patient's ABGs do show a low pH, but the PaCO2 is also low, which is not consistent with respiratory acidosis.

Rationale for the correct answer, B:

Metabolic acidosis is characterized by a low pH (below 7.35), low bicarbonate levels, and normal or low PaCO2. The patient's ABGs are consistent with metabolic acidosis because they show a low pH (7.26), low bicarbonate (14 mEq/L), and low PaCO2 (30 mm Hg).

Acute kidney injury is a common cause of metabolic acidosis. The kidneys play a vital role in regulating acid-base balance by excreting acids and reabsorbing bicarbonate. When the kidneys are damaged, they are unable to excrete acids effectively, leading to an accumulation of acids in the blood and a decrease in bicarbonate levels.

Additional Information:

It's important to note that the patient's low PaCO2 is likely a compensatory mechanism for the metabolic acidosis. In response to acidosis, the respiratory system tries to increase ventilation to blow off more carbon dioxide, which helps to raise the pH. However, this compensatory mechanism is often not enough to fully correct the acidosis.

A. Distended neck veins B. Bounding pulse C. BP 146/94 mm Hg D. Urine specific gravity 1.034 .

Correct Answer is D

Explanation

Choice A rationale:

Distended neck veins are not a reliable indicator of dehydration in adults. They can be caused by other factors, such as heart failure or fluid overload.

In cases of dehydration, the veins in the neck may actually be less visible due to decreased blood volume.

It's important to assess for other signs and symptoms of dehydration, such as urine output, skin turgor, and vital signs, to make an accurate diagnosis.

Choice B rationale:

A bounding pulse can be a sign of dehydration, but it can also be caused by other factors, such as anxiety, exercise, or fever. It's important to assess the pulse rate and rhythm in conjunction with other signs and symptoms to determine the cause.

A normal pulse rate is 60-100 beats per minute in adults. A bounding pulse is typically a strong, forceful pulse that can be easily felt.

Choice C rationale:

A blood pressure of 146/94 mm Hg is considered elevated, but it is not necessarily a sign of dehydration. Blood pressure can be elevated due to other factors, such as stress, pain, or underlying medical conditions. It's important to assess blood pressure in conjunction with other signs and symptoms to determine the cause. Choice D rationale:

Urine specific gravity is a measure of the concentration of solutes in the urine. A higher urine specific gravity indicates more concentrated urine, which is a sign of dehydration.

A normal urine specific gravity is 1.005-1.030. A urine specific gravity of 1.034 is considered high and is a strong indicator of dehydration.

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A nurse is collecting data about the fluid status of four patients.Which patient should the nurse identify as being at risk for fluid volume deficit?

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Naxlex Comprehensive Predictor Exams

A nurse is caring for a patient who has acute kidney injury.The patient’s ABGs are: pH: 7.26, PaCO2: 30 mm Hg, HCO3: 14 mEq/L. Which of the following acid-base imbalances should the nurse identify the patient is experiencing?

Correct Answer is B

Explanation

A nurse is planning to monitor a client for dehydration following several episodes of vomiting and an increase in the client’s temperature.Which of the following findings should the nurse identify as an indication that the client is dehydrated?

Correct Answer is D

Explanation

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A nurse is collecting data about the fluid status of four patients.
Which patient should the nurse identify as being at risk for fluid volume deficit?