Certified Pulmonary Function Technologist (CPFT) Practice Exam

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If a Nitrogen washout test shows a sudden single spike in nitrogen, what does this indicate?

The test should be discarded

Moisture entered the system but it does not ruin the test

A sudden single spike in nitrogen during a Nitrogen washout test typically indicates that there is moisture in the system, which can temporarily affect the nitrogen concentration readings. Moisture can introduce irregularities in the measurements without completely compromising the validity of the test.

In this context, while the spike is an anomaly, it does not automatically nullify the entire test. Instead, it suggests that something in the testing environment may have influenced the results, but the overall data can often still be interpreted correctly if proper precautions are taken. Therefore, acknowledging the presence of moisture impacting the test allows for a nuanced understanding of the results, indicating that while the spike should be noted, the integrity of the test is not entirely ruined.

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The patient has a respiratory issue

The equipment is malfunctioning

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