The nurse suspects that a patient has polycythemia vera based on which finding in the patient's laboratory reports? Select all that apply.
One, some, or all responses may be correct.

Choice A rationale:

Fullness from ascites is a symptom associated with conditions like liver cirrhosis, not directly related to chronic heart failure. Ascites is the accumulation of fluid in the abdominal cavity, causing a feeling of fullness and abdominal discomfort.

Choice B rationale:

Hypoproteinemia, a condition characterized by low levels of proteins in the blood, can lead to fluid retention and edema. However, it is not a direct cause of frequent urination. Frequent urination in this context is more likely related to increased fluid volume in the body, which can be caused by increased renal perfusion in the supine position due to fluid redistribution from the lower extremities to the kidneys.

Choice C rationale:

Hypoperfusion to the brain can lead to neurological symptoms, but it does not directly cause frequent urination. Frequent urination is often related to the kidneys' ability to filter excess fluid and excrete it as urine.

Choice D rationale:

Increased renal perfusion in the supine position can cause frequent urination, especially at night. When a person with chronic heart failure lies down, fluid that has accumulated in the lower extremities (edema) during the day is redistributed to the kidneys due to the change in body position. This increased renal perfusion results in an increased production of urine, leading to nocturia (frequent urination at night) and disrupting the patient's ability to sleep well. This symptom is characteristic of heart failure-related fluid overload and is an important clinical sign indicating worsening heart failure.

Choice A rationale:

Metabolic acidosis is characterized by a low pH (<7.35) and a low bicarbonate level (<22 mEq/L) The given arterial blood gas (ABG) values indicate a pH of 7.48 (which is alkalotic), a PaCO2 of 38 (within the normal range of 35-45 mm Hg), and an HCO3- of 30 (which is elevated) These values indicate metabolic alkalosis, not metabolic acidosis.

Choice B rationale:

Metabolic alkalosis is characterized by a high pH (>7.45) and an elevated bicarbonate level (>26 mEq/L) The given ABG values indicate a pH of 7.48 (which is alkalotic) and an elevated HCO3- of 30, indicating metabolic alkalosis. This condition can result from excessive loss of acids (e.g., vomiting) or excessive intake of bicarbonate or alkali substances.

Choice C rationale:

Respiratory acidosis is characterized by a low pH (<7.35) and a high PaCO2 (>45 mm Hg) The given ABG values indicate a normal pH of 7.48 and a PaCO2 of 38 (within the normal range), ruling out respiratory acidosis.

Choice D rationale:

Respiratory alkalosis is characterized by a high pH (>7.45) and a low PaCO2 (<35 mm Hg) The given ABG values indicate a pH of 7.48 (which is alkalotic) and a PaCO2 of 38 (within the normal range), ruling out respiratory alkalosis.