Ms. Jackson has been suffering from persistent vomiting for two days now. She appears to be lethargic and weak and has myalgia. She is noted to have dry mucus membranes and her capillary refill takes >4 seconds. She is diagnosed as having gastroenteritis and dehydration. Measurement of arterial blood gas shows pH 7.5. PaO2 85 mm Hg, PaCO2 40 mm Hg, and HCO3 34 mmol/L What acid-base disorder is shown?
Metabolic Alkalosis. Partially Compensated
Respiratory Acidosis, Partially Compensated
Respiratory Alkalosis. Uncompensated
Metabolic Alkalosis. Uncompensated
The Correct Answer is D
A. Metabolic Alkalosis, Partially Compensated, is incorrect because there is no evidence of respiratory compensation (normal PaCO2).
B. Respiratory Acidosis, Partially Compensated, is incorrect because the pH is high, not low as would be expected in acidosis, and the PaCO2 is normal, not high.
C. Respiratory Alkalosis, Uncompensated, is incorrect because the primary problem is metabolic (high HCO3), not respiratory, and the PaCO2 is normal, not low as would be seen in respiratory alkalosis.
D. Metabolic alkalosis is characterized by elevated pH and bicarbonate levels. In this scenario, the pH is elevated (7.5) and the bicarbonate (HCO3) level is high (34 mmol/L), indicating alkalosis. Vomiting leads to loss of gastric acid (hydrochloric acid), causing metabolic alkalosis. The respiratory system has not yet compensated fully for the alkalosis, as indicated by the normal PaCO2 (40 mm Hg).
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Sudden weight gain is a common sign of fluid overload in clients with end-stage kidney disease undergoing hemodialysis.
B. Skin turgor assessment is not as reliable in individuals with kidney disease due to changes in skin elasticity.
C. Flattened neck veins are not indicative of fluid overload; rather, they suggest dehydration.
D. Oxygen saturation may be affected by various factors but is not directly related to fluid overload in this context.
Correct Answer is D
Explanation
A. Edema in chronic kidney failure is more closely associated with sodium and water retention rather than protein intake.
B. Hyperkalemia in chronic kidney failure can be managed by restricting dietary potassium intake, but it is not primarily related to protein intake.
C. A low-protein diet aims to decrease, not increase, nitrogenous wastes in the blood.
D. A low-protein diet reduces the risk for uremia, a condition resulting from chronic kidney failure where urea and other waste products build up in the body due to impaired renal function. A low-protein diet helps decrease the workload on the kidneys by reducing the amount of nitrogenous waste they need to filter and excrete.
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