Difficulty: Hard

Average Score: 40%

Which of the following actions is appropriate when transporting a specimen for ABG analysis?

Rationale

Placing the specimen in ice is appropriate when transporting a specimen for ABG analysis.

Transporting arterial blood gas (ABG) specimens requires maintaining the integrity of the sample, particularly to prevent metabolic changes. Placing the specimen in ice slows down cellular metabolism, thereby preserving the levels of gases and metabolites for accurate analysis.

A (Collecting the specimen in an SST) YOUR ANSWER

Collecting a specimen in a serum separator tube (SST) is inappropriate for ABG analysis because these tubes are designed for serum samples rather than whole blood, which is required for accurate gas measurement. The gel in SSTs can interfere with the results, leading to inaccurate data.

C (Collecting the specimen in sodium citrate) YOUR ANSWER

Sodium citrate is an anticoagulant used primarily for coagulation studies, not for ABG analysis. Using sodium citrate can alter the blood gas values, particularly by affecting pH and carbon dioxide levels, making it unsuitable for this specific test.

D (Inserting the specimen in a light-resistant package) YOUR ANSWER

While light exposure can affect some laboratory analyses, ABG specimens are not significantly impacted by light. The main concern for ABG transport is temperature control, not light protection. Thus, this action does not address the critical need to maintain sample integrity for gas analysis.

Conclusion

When transporting specimens for arterial blood gas analysis, maintaining the sample's integrity is crucial, and placing the specimen in ice effectively preserves metabolic activity. Other options, including SST collection, sodium citrate use, and light-resistant packaging, fail to meet the specific requirements necessary for accurate ABG testing. Proper handling ensures reliable results essential for patient care.

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