A nurse is caring for a post-operative patient with a respiratory rate of 9 breaths/minute secondary to general anesthesia effects and incisional pain. Which arterial blood gas (ABG) would the nurse anticipate?
pH 7.50, pO2 85, pCO2 35, HCO3 30 mEq/L
pH 7.30, pO2 90, pCO2 35, HCO3 20 mEq/L
pH 7.50, pO2 95, pCO2 25, HCO3 22 mEq/L
pH 7.30, pO2 80, pCO2 55, HCO3 22 mEq/L
The Correct Answer is D
Choice A reason: The values pH 7.50, pO2 85, pCO2 35, HCO3 30 mEq/L indicate alkalosis with a high bicarbonate level, which is not consistent with the patient’s slow respiratory rate that would typically lead to respiratory acidosis.
Choice B reason: The values pH 7.30, pO2 90, pCO2 35, HCO3 20 mEq/L indicate metabolic acidosis with normal pCO2, which does not align with the respiratory issue described (hypoventilation).
Choice C reason: The values pH 7.50, pO2 95, pCO2 25, HCO3 22 mEq/L indicate respiratory alkalosis, which is characterized by a low pCO2. This is not consistent with the patient’s hypoventilation, which would lead to elevated pCO2 levels.
Choice D reason: The values pH 7.30, pO2 80, pCO2 55, HCO3 22 mEq/L indicate respiratory acidosis, which aligns with the patient’s hypoventilation due to anesthesia effects and incisional pain. The elevated pCO2 and decreased pH are consistent with reduced respiratory rate and shallow breathing.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: Maintaining nothing by mouth (NPO) and administering intravenous fluids is the best intervention to reduce discomfort in a patient with acute pancreatitis. NPO status helps to rest the pancreas by preventing the secretion of pancreatic enzymes that can exacerbate inflammation and pain. Intravenous fluids are essential to maintain hydration and electrolyte balance while the patient is not eating or drinking.
Choice B reason: Providing small, frequent feedings with no concentrated sweets is not appropriate for a patient with acute pancreatitis. The priority is to keep the patient NPO to rest the pancreas. Introducing any food can stimulate the pancreas and worsen the condition.
Choice C reason: Administering morphine sulfate intramuscularly every 4 hours as needed can help manage pain, but the preferred route for pain medication in acute pancreatitis is intravenous, as it provides quicker relief and avoids the discomfort of intramuscular injections. Pain management is important, but it should be part of a broader plan that includes NPO status and IV fluids.
Choice D reason: Positioning the patient in a flat, supine position is not recommended for reducing discomfort in acute pancreatitis. Patients often find relief in a semi-Fowler's position (head elevated) or by leaning forward, which can help reduce abdominal pain and pressure on the inflamed pancreas.
Correct Answer is ["D"]
Explanation
Choice A reason: Administering a vasopressor is not appropriate for low afterload. Vasopressors are used to increase blood pressure by causing vasoconstriction, which increases afterload. However, the administration of a vasopressor for low afterload is contradictory because the goal for low afterload would be to reduce the strain on the heart, not to increase it.
Choice B reason: Administering a vasodilator for low afterload is not correct. Vasodilators decrease afterload by causing the blood vessels to widen, reducing the resistance the heart has to pump against. Administering a vasodilator to treat low afterload is inappropriate because it would further lower afterload, potentially leading to inadequate perfusion and worsening cardiac output.
Choice C reason: Administering diuretics for low right atrial (RA) pressure is inappropriate. Diuretics help to remove excess fluid from the body, reducing blood volume and venous pressure. However, if a patient has low right atrial pressure, reducing blood volume further with diuretics could exacerbate the issue, leading to decreased cardiac output and poor perfusion.
Choice D reason: Administering a fluid bolus is the correct intervention for low preload. Preload refers to the volume of blood in the ventricles at the end of diastole. If preload is low, administering fluids increases blood volume, which enhances ventricular filling and improves cardiac output. This intervention helps to stabilize hemodynamics and improve overall perfusion.
Choice E reason: Administering a diuretic or vasodilator is the appropriate intervention for high preload. High preload indicates an excess of blood volume returning to the heart, which can strain the cardiac muscle and reduce efficiency. Diuretics help remove excess fluid, while vasodilators decrease venous return and reduce the volume of blood the heart has to handle, thus optimizing cardiac function and output.
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