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. There is no redness, warmth, or drainage at the insertion site.
This assessment is crucial for evaluating the status of the abdominal drain site. The absence of redness, warmth, or drainage suggests that the insertion site is healing well without signs of infection or inflammation. It indicates that the drain is functioning properly and that there are no immediate complications related to the drain insertion. This assessment directly addresses the goals related to monitoring the drain site for signs of infection or dysfunction.
B. Drainage from the surgical site is 30 mL less than yesterday.
Monitoring the drainage output from the surgical site is important to assess for changes in drainage patterns. A decrease in drainage volume may indicate reduced fluid accumulation at the surgical site, potentially reflecting improved healing and decreased need for drainage. However, while this assessment is valuable, it is not as directly related to assessing the status of the drain itself or evaluating complications at the insertion site as option A.
C. The patient reports adequate pain control with medications.
Pain control is an essential aspect of postoperative care, but it is not specifically related to assessing the functionality or complications of the abdominal drain. While pain management is important for patient comfort and recovery, it does not directly address the goals related to monitoring the drain site for signs of infection, leakage, or other complications.
D. Urine is clear yellow, and urine output is greater than 40 mL/hr.
While monitoring urine output and characteristics is important for assessing renal function and hydration status, it is not directly related to assessing the abdominal drain or its complications. Clear yellow urine and adequate urine output are generally positive indicators but do not provide specific information about the functionality or status of the drain.
Correct Answer is A
Explanation
A. Change the dressing when it is saturated:
This intervention is the most appropriate for managing a deep wound with a wet to-damp dressing. Wet to-damp dressings are designed to maintain a moist environment conducive to wound healing. Changing the dressing when it becomes saturated with wound exudate helps prevent excessive moisture accumulation, which can lead to skin maceration and potential infection. It ensures that the wound bed remains in an optimal healing environment and reduces the risk of complications.
B. Assess the wound bed once a day:
Assessing the wound bed is an essential part of wound care, as it allows the nurse to monitor healing progress, assess for signs of infection, and evaluate the effectiveness of the chosen dressing. However, the frequency of wound bed assessment may vary depending on the specific patient's needs and the type of dressing being used. While daily assessment is generally recommended, it does not directly dictate the timing of dressing changes for wet to-damp dressings, which are primarily changed based on saturation levels.
C. Contact the provider when the dressing leaks:
Contacting the provider when the dressing leaks or when there are concerns or complications is an important step in patient care. Leaking dressings can indicate issues with the dressing application, excessive wound exudate, or potential complications such as infection. It's crucial to inform the provider promptly so that appropriate interventions can be implemented, but this instruction is more reactive and does not specifically address the timing of dressing changes.
D. Change the dressing every 6 hours:
Changing the dressing every 6 hours is not typically recommended for wet to-damp dressings unless specifically indicated based on the patient's condition and the amount of wound exudate. Frequent dressing changes can disrupt the healing process, cause unnecessary trauma to the wound bed, and increase the risk of infection. Dressing change frequency should be based on the assessment of wound exudate and the dressing's ability to maintain a moist environment.
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