A nurse is caring for a patient who has the following arterial blood values: pH 7.12, PaO 56 mm Hg, PaCO 65 mm Hg, and HCO - 22 mEq/L (22 mmol/L). Which clinical situation does the nurse correlate with these values?
Diabetic ketoacidosis in a person with emphysema
Diarrhea for 36 hours in an older, frail woman
Anxiety-induced hyperventiIation in an adolescent
Bronchial obstruction related to aspiration of a hot dog
The Correct Answer is D
A. Diabetic ketoacidosis (DKA) in a person with emphysema:
In DKA, there is typically metabolic acidosis due to the accumulation of ketones in the blood, leading to a decrease in pH. However, the respiratory compensation mechanism in DKA usually results in a decreased PaCO2 (respiratory alkalosis) rather than an elevated PaCO2 as seen in the blood gas values provided. Additionally, emphysema is associated with chronic respiratory acidosis, not respiratory alkalosis as indicated by the elevated PaCO2.
B. Diarrhea for 36 hours in an older, frail woman:
Prolonged diarrhea can lead to metabolic acidosis due to the loss of bicarbonate through the gastrointestinal tract. The pH of 7.12 and the decreased HCO3- (22 mEq/L) suggest metabolic acidosis. However, the elevated PaCO2 (respiratory acidosis) is not consistent with pure metabolic acidosis caused by diarrhea. Respiratory acidosis typically occurs due to hypoventilation or respiratory dysfunction.
C. Anxiety-induced hyperventilation in an adolescent:
Anxiety-induced hyperventilation can lead to respiratory alkalosis due to excessive blowing off of CO2, resulting in a decrease in PaCO2. The pH of 7.12 is consistent with acidosis, but the elevated PaCO2 contradicts respiratory alkalosis. Anxiety-induced hyperventilation would typically result in a higher pH and lower PaCO2.
D. Bronchial obstruction related to aspiration of a hot dog:
A bronchial obstruction causing inadequate ventilation can lead to respiratory acidosis due to CO2 retention. The pH of 7.12 and the elevated PaCO2 (65 mm Hg) indicate respiratory acidosis. This situation is consistent with the blood gas values provided.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. The transfusion will begin after the administration of 650 mg of acetaminophen (Tylenol).
This option suggests that the nurse would administer acetaminophen to lower the client's temperature and then proceed with the blood transfusion. While acetaminophen can be used to reduce fever, the decision to administer medication should be made by the healthcare provider after assessing the client's overall condition and determining the cause of the fever. Administering medication without proper evaluation and orders from the healthcare provider is not appropriate.
B. The blood will be held, and the health care provider will be notified.
This option is the correct choice. When a client has an elevated temperature before a blood transfusion, it is standard practice to hold the transfusion and notify the healthcare provider. An elevated temperature could indicate an underlying infection or another condition that needs to be evaluated before proceeding with the transfusion to ensure the client's safety.
C. The transfusion will begin after the administration of an antihistamine.
Administering an antihistamine would not be the appropriate action in response to an elevated temperature before a blood transfusion. Antihistamines are typically used to treat allergic reactions, not fevers. Holding the transfusion and notifying the healthcare provider to assess the situation would be the correct course of action.
D. The transfusion will begin as prescribed.
This option is not appropriate because starting the transfusion without addressing the elevated temperature could pose risks to the client's health. Elevated temperatures may indicate an underlying infection or other conditions that need to be evaluated before proceeding with the transfusion. Holding the transfusion and seeking further guidance from the healthcare provider is the recommended action in this scenario.
Correct Answer is C
Explanation
A. “Call your surgeon if you have any questions at home.”
This instruction is important as it encourages the patient to seek help and clarification if they have any concerns or questions about their postoperative care at home. However, while communication with the surgeon is essential, it is not as immediately critical as ensuring proper hand hygiene when dealing with wound care and drain management.
B. ”Eat a diet high in protein, iron, zinc, and vitamin C.”
Nutritional advice is crucial for postoperative recovery, as a balanced diet high in protein, iron, zinc, and vitamin C can promote wound healing and overall recovery. However, while important for long-term recovery and healing, dietary recommendations do not directly address the immediate risk of infection or complications associated with wound care and drain management.
C. “Wash your hands before touching the drain or dressing."
This instruction is the most important in this context because proper hand hygiene is crucial for preventing infections during wound care and drain management. Clean hands significantly reduce the risk of introducing harmful bacteria or contaminants to the surgical site, which can lead to infections and other complications. Ensuring that the patient washes their hands before touching the drain or dressing is a fundamental measure for promoting wound healing and preventing postoperative complications.
D. “Be sure you keep all your postoperative appointments.”
Keeping postoperative appointments is important for ongoing assessment, monitoring, and follow-up care. However, while essential for overall recovery and management of postoperative issues, it is not as immediate or directly related to the patient's ability to manage their dressing and drain at home.
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