Nursing Elites

1. A client without a history of respiratory disease has a pulse oximeter in place after surgery. The nurse monitors the pulse oximeter readings to ensure that oxygen saturation remains above:

• A. 85%
• B. 89%
• C. 95%
• D. 100%

Correct answer: C

Rationale: Pulse oximetry is a noninvasive method of continuously monitoring the oxygen saturation of hemoglobin (SaO2). In the absence of underlying respiratory disease, the expected oxygen saturation level is at least 95%. Oxygen saturation levels below 95% may indicate hypoxemia, which can compromise tissue perfusion and oxygen delivery to vital organs. Therefore, maintaining oxygen saturation above 95% is crucial to ensure adequate oxygenation post-surgery. Choices A, B, and D are incorrect as they represent oxygen saturation levels that are below the expected value for a client without a history of respiratory disease, which should be at least 95%.

2. A client with diabetes mellitus who is taking NPH insulin (Humulin N) in the evening is most likely to become hypoglycemic shortly after midnight because this insulin peaks in 6 to 8 hours. What intervention should the nurse recommend to help prevent hypoglycemia while the client is sleeping?

• A. Eat a bedtime snack.
• B. Avoid physical activity.
• C. Take half the usual dose of insulin.
• D. Discontinue insulin until the next meal.

Correct answer: A

Rationale: Eating a bedtime snack is the most appropriate intervention to prevent hypoglycemia during the night when NPH insulin peaks. This snack helps maintain blood glucose levels and counteracts the risk of hypoglycemia. Avoiding physical activity is not recommended as it can further lower blood sugar levels. Taking half the usual dose of insulin can lead to inadequate control of blood sugar levels. Discontinuing insulin until the next meal can result in uncontrolled hyperglycemia, especially during the peak action of NPH insulin.

3. The nurse empties the nasogastric suction collection canister of a client who had a bowel resection the previous day and notes that 1000 ml of gastric secretions were collected in the last 4 hours. What condition is the client at risk for developing?

• A. Metabolic alkalosis
• B. Hyperkalemia
• C. Metabolic acidosis
• D. Hypoglycemia

Correct answer: A

Rationale: The correct answer is A: Metabolic alkalosis. Loss of gastric secretions, which contain stomach acid, can lead to metabolic alkalosis. Excessive loss of acid results in an increase in the blood pH, leading to alkalosis. Hyperkalemia (B) is an elevated potassium level and is not directly related to the loss of gastric secretions. Metabolic acidosis (C) is an acid-base imbalance characterized by low pH and bicarbonate levels, which is the opposite of what would occur with the loss of gastric secretions. Hypoglycemia (D) is low blood sugar and is not typically associated with the scenario described in the question.

4. While assisting a client with a closed chest tube drainage system to move from bed to a chair, the chest tube gets caught on the chair leg and becomes dislodged from the insertion site. What is the immediate priority for the nurse?

• A. Contacting the physician
• B. Reinserting the chest tube
• C. Transferring the client back to bed
• D. Covering the insertion site with a sterile occlusive dressing

Correct answer: D

Rationale: The immediate priority for the nurse when a chest tube becomes dislodged from the insertion site is to cover the site with a sterile occlusive dressing. This action helps prevent air from entering the pleural space, which could lead to a pneumothorax. The nurse should then perform a respiratory assessment to monitor the client's breathing, assist the client back into bed to a position of comfort, and notify the physician. Reinserting the chest tube is a task for the physician, not the nurse, as it requires specific training and expertise.

5. A healthcare professional reviews the blood gas results of a client in respiratory distress. The pH is 7.32, and the PCO2 is 50 mm Hg. Which of the following acid-base imbalances does the professional recognize in these findings?

• A. Metabolic acidosis
• B. Metabolic alkalosis
• C. Respiratory acidosis
• D. Respiratory alkalosis

Correct answer: C

Rationale: In respiratory acidosis, the pH is low (<7.35) and the PCO2 is increased (>45 mm Hg). These findings indicate that the client is experiencing respiratory acidosis, a condition where there is an excess of carbon dioxide in the blood due to inadequate ventilation, commonly seen in respiratory distress. Metabolic acidosis (Choice A) is characterized by a low pH and decreased bicarbonate levels, which is not the case in this scenario. Metabolic alkalosis (Choice B) is associated with a high pH and increased bicarbonate levels. Respiratory alkalosis (Choice D) is marked by a high pH and decreased PCO2, opposite to the values presented in the blood gas results of this client.

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