Final answer:
D) Delay of more than 10 minutes before running blood gas sample
Excessive blood drawn into the sample tube does not cause an erroneous value on a blood gas analyzer, unlike other factors such as excess anticoagulant, inadequate removal of flush solution, or delays in sample processing.
Step-by-step explanation:
All of the following can cause an erroneous value on a blood gas analyzer except excessive blood drawn into the sample tube. When considering factors that impact the accuracy of blood gas analysis:
- Excess anticoagulant in the sample tube may dilute the blood and cause inaccurate results.
- Inadequate removal of flush solution during blood draw may contaminate the sample, introducing artefacts.
- Delay of more than 10 minutes before running blood gas sample can lead to changes in gas concentrations due to cell metabolism if not placed on ice.
In contrast, drawing excess blood into the sample tube typically does not cause an erroneous result, as long as the correct blood-to-anticoagulant ratio is maintained and the sample is mixed properly. Therefore, the correct answer is C) Excessive blood drawn into the sample tube.