Cough Reflex Test (CRT) Practice

The calibration results of a spirometer are assessed to ensure that the measured values align closely with a known standard. In this case, the spirometer measured volumes of 2.67 L, 2.70 L, and 2.68 L against a standard of 3.0 L. To evaluate accuracy, we look at how close the measured values are to the standard value of 3.0 L.

The measured volumes show a consistent deviation from the standard, with all three readings falling significantly short of the expected 3.0 L. This consistent under-measurement indicates that the spirometer is not accurately reflecting the known volume. Therefore, it can be classified as inaccurate.

In contrast, being within acceptable limits typically refers to measurements that are close enough to the standard value, usually defined within a specific percentage or error range. Given the notable difference from the 3.0 L target, the results do not qualify for this categorization. Likewise, the need for adjustments would generally imply a closer alignment with acceptable ranges, which is also not applicable here due to the substantial discrepancy from the standard.