A pulmonary function technologist uses a 3-L syringe and a tank of 10% He to prepare serial dilutions of gas to verify the linearity of a helium analyzer used for closed-circuit measurements of FRC.The following data are recorded: On the basis of these results,the technologist should conclude that:
A) The He analyzer is performing acceptably.
B) The He analyzer is nonlinear.
C) The syringe had a significant leak.
D) The He tank was mislabeled.

Question

A pulmonary function technologist uses a 3-L syringe and a tank of 10% He to prepare serial dilutions of gas to verify the linearity of a helium analyzer used for closed-circuit measurements of FRC.The following data are recorded:  On the basis of these results,the technologist should conclude that:
A) The He analyzer is performing acceptably. 
B) The He analyzer is nonlinear. 
C) The syringe had a significant leak. 
D) The He tank was mislabeled.

Quizplus · Accepted Answer

The data shows that the expected increase in helium concentration with each dilution is not happening at the same rate, indicating nonlinearity in the helium analyzer. This suggests that further calibration or adjustment is necessary. The other options can be ruled out as there is no evidence of a syringe leak or mislabeled tank in the data.

A Pulmonary Function Technologist Uses a 3-L Syringe and a Tank