A nurse is analyzing the arterial blood gas (ABG) results of a patient.
The patient’s ABGs are: pH:7.6, PaCO2:40 mm Hg, HCO3:32 mEq/L. Which of the following acid-base conditions should the nurse identify the patient is experiencing?
Respiratory acidosis.
Respiratory alkalosis.
Metabolic acidosis.
Metabolic alkalosis.
The Correct Answer is D
Choice A rationale:
Respiratory acidosis is characterized by a low pH (less than 7.35), a high PaCO2 (greater than 45 mm Hg), and a normal or high HCO3 (22-26 mEq/L). It occurs when there is a buildup of carbon dioxide in the blood due to impaired ventilation.
The patient's ABGs do not align with respiratory acidosis because the pH is elevated (7.6), and the PaCO2 is within the normal range (40 mm Hg).
Choice B rationale:
Respiratory alkalosis is characterized by a high pH (greater than 7.45), a low PaCO2 (less than 35 mm Hg), and a normal or low HCO3 (22-26 mEq/L). It occurs when there is excessive loss of carbon dioxide through hyperventilation.
The patient's ABGs do not align with respiratory alkalosis because the HCO3 is elevated (32 mEq/L), which is not typical for this condition.
Choice C rationale:
Metabolic acidosis is characterized by a low pH (less than 7.35), a normal or low PaCO2 (less than 40 mm Hg), and a low HCO3 (less than 22 mEq/L). It occurs when there is an excess of acid in the body or a loss of bicarbonate.
The patient's ABGs do not align with metabolic acidosis because the pH is elevated (7.6), and the HCO3 is elevated (32 mEq/L).
Choice D rationale:
Metabolic alkalosis is characterized by a high pH (greater than 7.45), a normal or high PaCO2 (40-45 mm Hg), and an elevated HCO3 (greater than 26 mEq/L). It occurs when there is an excess of bicarbonate in the body or a loss of acid.
The patient's ABGs align with metabolic alkalosis because of the high pH (7.6), normal PaCO2 (40 mm Hg), and elevated HCO3 (32 mEq/L).
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale:
It is not necessary to remind a patient to avoid turning from side to side after femoral artery catheterization. Restricting movement in this way could actually increase the risk of complications such as deep vein thrombosis (DVT).
Early ambulation is generally encouraged to promote circulation and prevent blood clots.
Patients are typically allowed to turn and reposition themselves as needed for comfort, unless there are specific contraindications.
Choice B rationale:
Keeping the patient in a high-Fowler's position for 6 hours is not a standard recommendation following femoral artery catheterization.
The patient's position should be based on their individual needs and comfort level.
In some cases, a slight elevation of the head of the bed may be helpful to promote venous return, but prolonged high-Fowler's positioning is not necessary.
Choice C rationale:
Passive range-of-motion exercises are not typically performed on the affected extremity immediately following femoral artery catheterization.
This is because there is a risk of dislodging the catheter or causing bleeding at the puncture site.
Once the catheter has been removed and the puncture site has healed, gentle range-of-motion exercises may be recommended to help maintain joint mobility.
Choice D rationale:
Checking pedal pulses every 15 minutes is essential to assess for adequate circulation to the lower extremities following femoral artery catheterization.
This is because there is a risk of complications such as thrombosis or embolism, which can compromise blood flow to the legs and feet.
If the pedal pulses are weak or absent, it could indicate a serious problem that requires immediate intervention.
Correct Answer is A
Explanation
The correct answer is Choice A.
Choice A rationale: Encouraging increased fluid intake helps maintain blood volume and reduces viscosity, promoting circulation and lowering the risk of venous stasis and clot formation postoperatively.
Choice B rationale: Keeping the affected knee flexed impairs venous return and increases stasis, elevating the risk of thrombosis. Proper positioning with extension promotes circulation and reduces clot risk.
Choice C rationale: Prolonged bed rest contributes to immobility-induced venous stasis, a major risk factor for DVT. Early ambulation and leg exercises are essential to prevent thromboembolic events.
Choice D rationale: Massaging the calf of a postoperative patient is contraindicated due to the risk of dislodging a thrombus, potentially leading to a life-threatening pulmonary embolism.
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