The nurse is caring for a client whose arterial blood gas reveals partially compensated respiratory alkalosis. Which results are consistent with this 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%

pH 7.32, Pa02 88 mmHg, PaCO2 50 mmHg, HCO3 29 mEq/L, 02 sat 94%

pH 7.35, Pa02 98 mmHg, PaCO2 55 mmHg, HCO3 28 mEq/L, 02 sat 99%

pH 7.64, PaO2 94 mmHg, PaCO2 23 mmHg, HCO3 14 mEq/L, 02 sat 88%

PH 7.50, Pa02 91 mmHg, PaCO2 52 mmHg, HCO3 30 mEq/L, 02 sat 96%

Answer and Explanation

The Correct Answer is C

A) pH 7.32, PaO2 88 mmHg, PaCO2 50 mmHg, HCO3 29 mEq/L, O2 sat 94%
This result suggests respiratory acidosis rather than respiratory alkalosis. In respiratory acidosis, the pH would be low (acidotic), PaCO2 would be elevated (since it reflects CO2 retention), and HCO3 would typically be elevated as a compensatory mechanism. This set of ABG values does not align with respiratory alkalosis, so it is not consistent with partially compensated respiratory alkalosis.

B) pH 7.35, PaO2 98 mmHg, PaCO2 55 mmHg, HCO3 28 mEq/L, O2 sat 99%
This set of values suggests respiratory acidosis, as indicated by a low pH (acidosis) and high PaCO2 (carbon dioxide retention). The HCO3 value is slightly elevated in compensation for respiratory acidosis, but this is not an example of partially compensated respiratory alkalosis, so it doesn't match the question's requirement.

C) pH 7.64, PaO2 94 mmHg, PaCO2 23 mmHg, HCO3 14 mEq/L, O2 sat 88%
This result is consistent with partially compensated respiratory alkalosis. In respiratory alkalosis, the pH would be elevated (alkalotic), PaCO2 would be low (indicating hyperventilation), and the kidneys would attempt to compensate by lowering bicarbonate (HCO3). In this case, the low PaCO2 (23 mmHg) and the low HCO3 (14 mEq/L) demonstrate partial compensation. The pH is also elevated at 7.64, which aligns with alkalosis. This is the correct answer for partially compensated respiratory alkalosis.

D) pH 7.50, PaO2 91 mmHg, PaCO2 52 mmHg, HCO3 30 mEq/L, O2 sat 96%
This result suggests respiratory acidosis with compensation. The elevated PaCO2 (52 mmHg) indicates CO2 retention, leading to acidosis, while the slightly elevated HCO3 (30 mEq/L) shows that the kidneys are compensating for the respiratory acidosis. The pH of 7.50 is slightly alkalotic, but it is more consistent with compensation for respiratory acidosis rather than respiratory alkalosis. Thus, this set of ABG values does not match the description of partially compensated respiratory alkalosis.

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Correct Answer is C

Explanation

A. Expect fluctuations of symptoms with temperature change: While symptom fluctuations may occur due to various factors, temperature changes are not a hallmark feature of Huntington's Disease (HD). HD is characterized by progressive motor, cognitive, and psychiatric symptoms, including involuntary movements (chorea), cognitive decline, and mood disturbances. Although other neurological conditions may show symptom fluctuations with temperature changes, this is not specific to HD.

B. New surgical techniques offer the best hope for a cure: There are currently no cures for Huntington's Disease, and while medical management can help manage symptoms (such as using medications for chorea or psychiatric symptoms), surgical techniques do not offer a cure for HD. The disease is progressive, and interventions typically focus on symptom management rather than cure. Families should be informed that while research is ongoing, a cure is not currently available.

C. Information about genetic testing: Huntington's Disease (HD) is a genetic disorder caused by a mutation in the HTT gene. It is inherited in an autosomal dominant pattern, meaning that a person with a parent who has HD has a 50% chance of inheriting the disease. Genetic testing is a critical part of the diagnosis process, and it can confirm the presence of the mutated gene before symptoms appear, which is important for family planning and early intervention. However, while genetic testing can provide information about whether an individual will develop the disease, it does not alter the course of the disease or provide a cure. It is essential to provide this information to clients and families, so they understand the role of genetic counseling and testing in managing the disease.

D. The disease process is intense but short in duration: Huntington's Disease is progressive and long-lasting. The disease usually begins in mid-adulthood (typically between ages 30-50), and the symptoms worsen over time. Individuals with HD may live for 15-20 years after symptom onset. The disease duration is long-term, not short, and it becomes increasingly debilitating as it progresses. The intensity of symptoms increases over time, and the disease is not characterized by a short duration.

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

The nurse is teaching the client and family about Huntington's Disease (HD). What information should the nurse include?

Correct Answer is C

Explanation

A nurse is providing teaching to a client newly diagnosed with Parkinson's disease who is prescribed carbidopa/levodopa. What should be included in client teaching?

Correct Answer is C

Explanation

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