The nurse is caring for a client diagnosed with acute respiratory distress syndrome (ARDS). The client's ABG reveals: pH 7.59, PaCO2 29 mmHg, Pa02 55 mmHg, HCO3 22 mEq/L, and 02 saturation 72%. What would be the expected assessment finding?

Table 9.9 Normal Arterial Blood Gas Values

ABG Value.                                                             Normal Value

pH                                                                             7.35-7.45

PaCO2                                                                                                            35-45 mmHg

HCO3-                                                                         22-26mEq/L

Base excess                                                               -2 to +2

PaO2                                                                            80-95 mmHg

SaO2                                                                            >95%

respiratory rate of 10 breaths per minute.

respiratory rate of 32 breaths per minute.

blood pressure 86/42 mmHg.

heart rate of 45 beats per minute.

Answer and Explanation

The Correct Answer is B

Explanation of each option:

A. Respiratory rate of 10 breaths per minute:
A respiratory rate of 10 breaths per minute would be too slow in a patient with ARDS and hypoxemia. In response to hypoxemia, the body typically increases the respiratory rate to improve oxygenation. A respiratory rate of 10 breaths per minute would not be expected in this situation.

B. Respiratory rate of 32 breaths per minute: The arterial blood gas (ABG) results indicate respiratory alkalosis with hypoxemia, which is a common finding in patients with acute respiratory distress syndrome (ARDS). pH 7.59: This is alkalotic, meaning the body is experiencing respiratory alkalosis.

PaCO2 29 mmHg: The PaCO2 is low, indicating hyperventilation, which is a compensatory response to the alkalosis in an attempt to reduce carbon dioxide levels.

PaO2 55 mmHg: This is severely low, indicating hypoxemia (low oxygen levels in the blood), a hallmark of ARDS. HCO3 22 mEq/L: The bicarbonate is normal, suggesting that the metabolic component has not yet compensated for the respiratory alkalosis, or that it is in the early stages of compensation. Given these ABG results, the body is attempting to compensate for hypoxemia by increasing respiratory rate (tachypnea), which leads to hyperventilation and further reduction in PaCO2. Therefore, an expected assessment finding in this scenario would be a high respiratory rate (such as 32 breaths per minute), which is a compensatory response to hypoxemia.

C. Blood pressure 86/42 mmHg:
While hypotension can occur in severe cases of ARDS due to impaired oxygenation and circulation, it is not directly reflected by the ABG results provided. Hypoxemia and alkalosis would more likely lead to tachypnea and compensatory mechanisms like tachycardia, rather than significant hypotension unless there is another contributing factor, such as shock or sepsis. Therefore, hypotension is not the most expected finding based on these ABGs.

D. Heart rate of 45 beats per minute:
A heart rate of 45 beats per minute is bradycardic, which would be unusual in a patient with hypoxemia and respiratory alkalosis. Tachycardia is a more common compensatory response to hypoxia, as the heart works harder to improve oxygen delivery to tissues. A heart rate of 45 beats per minute would be more suggestive of a different underlying condition, such as vagal stimulation or cardiac conduction issues, but it is not the expected response in this case.

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Correct Answer is B

Explanation

A) Apply 4L of nasal oxygen, administer a cough suppressant, and place client on bedrest:
This approach is inappropriate for a client with bacterial pneumonia. While oxygen therapy may be necessary for some clients, administering a cough suppressant in this scenario is counterproductive. Pneumonia often leads to the accumulation of secretions, and suppressing the cough would prevent the client from clearing mucus from their airways, potentially worsening the condition. Bedrest is generally indicated, but it should not be the sole intervention.

B) Increase fluid intake, administer antibiotic(s), and facilitate adequate coughing:
This is the most appropriate plan of care. Increasing fluid intake helps to thin the mucus, making it easier to clear from the airways, which is crucial in pneumonia. Antibiotics are necessary to treat the bacterial infection causing pneumonia. Facilitating adequate coughing helps the client expel secretions, reducing the risk of airway obstruction and improving oxygenation. Coarse rhonchi indicate the presence of mucus or secretions, which should be cleared with effective coughing.

C) Decrease activity, increase bronchodilator use, and encourage pursed lip breathing:
Decreasing activity is generally appropriate for a client with pneumonia to reduce fatigue, but increasing bronchodilator use is not typically indicated unless there is underlying bronchospasm, such as in asthma or COPD. Pursed lip breathing can help improve ventilation, but it is more beneficial for clients with obstructive airway diseases, not primarily for those with bacterial pneumonia. Therefore, this option does not address the immediate needs of the client.

D) Place in prone position, begin steroid therapy, and monitor glucose levels:
While prone positioning is helpful in some conditions like acute respiratory distress syndrome (ARDS), it is not routinely used for bacterial pneumonia unless the client has severe hypoxemia and requires advanced respiratory support. Steroid therapy is generally not indicated for bacterial pneumonia unless there is a specific inflammatory component (such as a superimposed condition like asthma or COPD). Monitoring glucose levels may be important in clients on steroid therapy, but this is not a primary concern in the treatment of bacterial pneumonia.

A. This is a safe medication that is associated with minimal side effects B. Stop the medication if there is increased urination C. Change position slowly to prevent orthostatic hypotension D. Double the dose if a dose is missed at the next scheduled time

Correct Answer is C

Explanation

A. This is a safe medication that is associated with minimal side effects: Carbidopa/levodopa is an effective medication for managing the symptoms of Parkinson's disease, but it is not without side effects. Common side effects include nausea, dizziness, dyskinesia (involuntary movements), and orthostatic hypotension. It is important to be honest with clients about the potential side effects and manage them proactively, rather than describing the medication as "safe with minimal side effects," which could lead to underestimating the risks.

B. Stop the medication if there is increased urination: Increased urination is not a common or typical side effect of carbidopa/levodopa. In fact, the medication is more likely to cause urinary retention or difficulty urinating in some cases. The client should not stop taking the medication without consulting their healthcare provider. Any urinary changes should be reported, but abrupt discontinuation of the medication is not advised without medical supervision.

C. Change position slowly to prevent orthostatic hypotension: One of the common side effects of carbidopa/levodopa therapy is orthostatic hypotension, which occurs when a person experiences a drop in blood pressure upon standing up. This can lead to dizziness or fainting, increasing the risk of falls. The client should be educated to change positions slowly, such as sitting up slowly and standing up gradually from a lying position, to minimize the risk of orthostatic hypotension. This is a critical aspect of safety and should be emphasized as part of the teaching.

D. Double the dose if a dose is missed at the next scheduled time: Doubling the dose of carbidopa/levodopa if a dose is missed can lead to an overdose, which may cause serious side effects, including dyskinesias or other complications. Clients should be instructed to take the missed dose as soon as they remember, unless it is almost time for the next dose. In that case, they should skip the missed dose and continue with their regular dosing schedule. It is important to never double the dose without guidance from the healthcare provider.

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Naxlex Comprehensive Predictor Exams

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Explanation

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Correct Answer is C

Explanation

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