A client is admitted to the emergency room with a respiratory rate of 7/min. Arterial blood gases (ABG) reveal the following values. Which of the following is an appropriate analysis of the ABGs? pH 7.22, PacO₂ 68 mm Hg, Base excess -2, PaO₂ 78 mm Hg, Saturation 80%, Bicarbonate 26 mEq/L.
Metabolic alkalosis.
Respiratory acidosis.
Metabolic acidosis.
Respiratory alkalosis.
The Correct Answer is B
Respiratory acidosis.
Choice A rationale:
Metabolic alkalosis occurs when there is an increase in pH and bicarbonate (HCO₃⁻) levels, which is not the case here. The pH value in this scenario is 7.22, indicating acidosis.
Choice B rationale:
Respiratory acidosis results from the retention of carbon dioxide (PaCO₂) in the blood, leading to a decrease in pH. In this case, the pH is low (7.22), and the PacO₂ is elevated (68 mm Hg), supporting the diagnosis of respiratory acidosis.
Choice C rationale:
Metabolic acidosis is characterized by a decrease in pH and bicarbonate levels, along with a possible negative base excess. However, in this scenario, the base excess is -2, which does not indicate metabolic acidosis.
Choice D rationale:
Respiratory alkalosis occurs when there is a decrease in PaCO₂, leading to an increase in blood pH. The ABG values provided (pH 7.22, PacO₂ 68 mm Hg) are not consistent with respiratory alkalosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Hypocalcemia. Action to Take 1: Prepare to check a serum albumin level.
Rationale:
Hypocalcemia can be influenced by changes in serum albumin levels, as calcium may bind to albumin. Correcting calcium levels based on albumin can help determine the actual calcium status. Action to Take 2: Request a STAT ECG. Rationale: Hypocalcemia can lead to prolonged QT intervals on an electrocardiogram (ECG). A STAT ECG is necessary to assess cardiac function and detect any potential arrhythmias. Parameters to Monitor 1: Serum bicarbonate level. Rationale: Monitoring serum bicarbonate levels can help assess the client's acid-base balance and metabolic status. Abnormal bicarbonate levels may indicate metabolic disturbances. Parameters to Monitor 2: Intake and Output. Rationale: Monitoring intake and output is essential to evaluate the client's fluid balance and kidney function. Hypocalcemia can impact renal function, and assessing urine output is crucial.
Correct Answer is D
Explanation
The correct answer is choice D. The client who has gastroenteritis and is febrile.
Choice A rationale:
The client with end-stage renal failure scheduled for dialysis would not be at risk for fluid volume deficit because dialysis is a treatment that removes waste, salt, and extra water to prevent them from building up in the body, keeping a safe level of certain chemicals in the blood, and controlling blood pressure.
Choice B rationale:
Being NPO (nothing by mouth) since midnight for endoscopy typically involves a short period of fasting. While it could potentially contribute to a mild fluid volume deficit, it is not as significant as other causes like vomiting or diarrhea, which can lead to more substantial fluid losses.
Choice C rationale:
A client with left-sided heart failure and an elevated BNP level is more likely to experience fluid volume overload rather than a deficit. BNP is released in response to ventricular volume expansion and pressure overload, which are indicative of heart failure, not fluid volume deficit.
Choice D rationale:
The client with gastroenteritis and a fever is at risk for fluid volume deficit due to increased fluid losses from vomiting, diarrhea, and fever-induced perspiration. These symptoms align with the common risk factors for fluid volume deficit, which include vomiting, diarrhea, and sweating.
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