RPFT Exam Question No 23

Question No 23:

Results of two blood gas samples drawn from the same patient, 30 minutes apart, are
shown below:

 Which of the following is the most likely explanation for these differences?


A. The patient's minute ventilation has increased.
B. The patient has developed a pneumothorax.
C. The 10:30 blood sample has been contaminated with air.
D. The 10:30 blood sample contains an excess of heparin solution.

Answer: A