The nurse is caring for a patient with end-stage kidney disease (ESKD). Which arterial blood gas results (ABG) will the nurse correlate with the patient's condition?
pH 7.21, PaCO2 36, HCO3 14
pH 7.50, PaCO2 29, HCO3 22
pH 7.47, PaCO2 45, HCO3 33
pH 7.31, PaCO2 48, HCO3 24
The Correct Answer is A
Choice A reason: The ABG results of pH 7.21, PaCO2 36, HCO3 14 indicate metabolic acidosis, which is common in patients with end-stage kidney disease (ESKD). In ESKD, the kidneys lose their ability to excrete acid and maintain bicarbonate levels, leading to an accumulation of acid in the blood. This condition results in a low pH (acidic), normal PaCO2 (as the respiratory system attempts to compensate), and low HCO3 (bicarbonate).
Choice B reason: The ABG results of pH 7.50, PaCO2 29, HCO3 22 indicate respiratory alkalosis, which is not typically associated with ESKD. Respiratory alkalosis occurs when there is excessive exhalation of carbon dioxide, leading to a higher pH (alkaline). This condition is more likely to be seen in situations such as hyperventilation, anxiety, or certain lung diseases.
Choice C reason: The ABG results of pH 7.47, PaCO2 45, HCO3 33 indicate metabolic alkalosis, which is not typically associated with ESKD. Metabolic alkalosis occurs when there is an excess of bicarbonate or a loss of acid. This condition can result from factors such as vomiting, diuretic use, or excessive antacid consumption. It is not a common finding in patients with ESKD.
Choice D reason: The ABG results of pH 7.31, PaCO2 48, HCO3 24 indicate respiratory acidosis, which is not typically associated with ESKD. Respiratory acidosis occurs when there is an accumulation of carbon dioxide due to impaired respiratory function. This condition is more likely to be seen in chronic obstructive pulmonary disease (COPD) or other respiratory disorders. It is not a common finding in patients with ESKD.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: Hypotension, or low blood pressure, is a common indicator of fluid volume deficit. When a patient is dehydrated or has a significant loss of fluids, their blood volume decreases, leading to lower blood pressure. This condition requires immediate attention and management to prevent complications such as shock or organ failure. Monitoring and correcting fluid balance is crucial in managing patients with diabetic ketoacidosis, making hypotension a significant assessment finding.
Choice B reason: Bradycardia, or slow heart rate, is not typically associated with fluid volume deficit. It is more often related to other conditions such as heart block, hypothyroidism, or use of certain medications. In the context of diabetic ketoacidosis, fluid volume deficit would not manifest primarily as bradycardia.
Choice C reason: Polyphagia, or excessive hunger, is a symptom commonly associated with diabetes mellitus but does not indicate fluid volume deficit. Polyphagia results from the body's inability to use glucose properly, leading to increased hunger. It is not directly related to the patient's hydration status or fluid volume.
Choice D reason: Rapid, deep respiration, also known as Kussmaul breathing, is a compensatory mechanism in response to metabolic acidosis, a hallmark of diabetic ketoacidosis. While it is an important clinical sign, it does not specifically indicate fluid volume deficit. Kussmaul respiration occurs due to the body's attempt to expel excess carbon dioxide and correct the acid-base imbalance.
Correct Answer is D
Explanation
Choice A reason: Always using a low flow device such as a nasal cannula or simple face mask is not necessarily appropriate for all patients. The choice of device should be based on the patient's oxygen needs and clinical status.
Choice B reason: Correcting the PaO2 to a normal level as quickly as possible using mechanical ventilation is not appropriate in most cases. Rapid correction of oxygen levels can lead to complications such as oxygen toxicity. Mechanical ventilation is used in severe cases but is not the first line of treatment for most patients.
Choice C reason: Using continuous positive airway pressure (CPAP) to maintain PaCO2 greater than 50 mmHg is incorrect. CPAP is used to maintain open airways and improve oxygenation but is not used to target specific PaCO2 levels.
Choice D reason: Increasing the PaO2 to an acceptable level at the lowest oxygen concentration possible is the most appropriate guideline. This approach aims to correct hypoxemia without causing oxygen toxicity. The goal is to achieve adequate oxygenation while minimizing the risk of adverse effects from high oxygen concentrations.
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