A nurse reviews the arterial blood gas (ABG) values of a client admitted with pneumonia: pH, 7.32; PaCO2, 48 mm Hg; PaO2, 70 mm Hg; and HCO3, 24 mEq/L. What do these values indicate?
Metabolic Acidosis
Respiratory Acidosis
Metabolic Alkalosis
Respiratory Alkalosis
The Correct Answer is B
A. Metabolic Acidosis
Metabolic acidosis is characterized by a low pH and low bicarbonate (HCO3) level. In this case, the pH is low (indicating acidosis), but the bicarbonate level is within the normal range, which is inconsistent with metabolic acidosis.
B. Respiratory Acidosis
This is correct. Respiratory acidosis is characterized by an elevated partial pressure of carbon dioxide (PaCO2), leading to a decrease in pH. The ABG values in this case indicate elevated PaCO2 and a low pH, consistent with respiratory acidosis.
C. Metabolic Alkalosis
Metabolic alkalosis is characterized by a high pH and high bicarbonate (HCO3) level. In this case, the pH is low (indicating acidosis), which is inconsistent with metabolic alkalosis.
D. Respiratory Alkalosis
Respiratory alkalosis is characterized by a low partial pressure of carbon dioxide (PaCO2) and a high pH. In this case, the PaCO2 is elevated, which is inconsistent with respiratory alkalosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. "The parathyroid has no effect on calcium levels in the body; this will just help prevent osteoporosis":
Explanation: This statement is incorrect. The parathyroid gland plays a crucial role in calcium homeostasis. Hypoparathyroidism, characterized by decreased parathyroid hormone (PTH) production, leads to low blood calcium levels, not high levels.
B. "The reason you have hypoparathyroidism is that you were diagnosed with hypothyroidism, and when the thyroid doesn't work, neither does the parathyroid, so you need these supplements."
Explanation: This statement is incorrect. The parathyroid and thyroid are separate glands with distinct functions. Hypoparathyroidism is not a result of hypothyroidism.
C. "A decrease in parathyroid hormone causes low calcium levels, so your body to break down bones to maintain normal calcium levels, and this will prevent that from happening."
Explanation: This is the correct statement. Hypoparathyroidism leads to a decrease in PTH, resulting in low blood calcium levels. Without sufficient PTH, the body may resort to breaking down bones to maintain calcium levels.
D. "An increase in parathyroid hormone causes your body to move calcium into the cells to reduce blood calcium levels, so you have to replace the levels in the blood."
Explanation: This statement is incorrect. An increase in parathyroid hormone (PTH) typically leads to increased blood calcium levels by promoting the release of calcium from bones and reducing calcium excretion by the kidneys. This describes hyperparathyroidism, not hypoparathyroidism.
Correct Answer is C
Explanation
A. Development of a buffalo hump and moon face:
This is associated with Cushing's syndrome, a disorder characterized by prolonged exposure to high levels of cortisol.
B. Central obesity and purple striations:
Also indicative of Cushing's syndrome, where excess cortisol can lead to the accumulation of fat in the abdominal area (central obesity) and the development of purple stretch marks (striae).
C. Sudden weight loss without dieting:
This is more characteristic of hyperthyroidism, where the thyroid gland is overactive, leading to increased metabolism and unintended weight loss.
D. Positive Trousseau's sign when checking the client's blood pressure:
Trousseau's sign is associated with hypocalcemia and is seen in conditions affecting the parathyroid gland rather than the thyroid. It involves carpal spasm induced by inflating a blood pressure cuff above the systolic pressure for a few minutes.
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