Difficulty: Medium

Average Score: 63%

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 an arterial blood gas (ABG) specimen on ice helps maintain the sample's integrity by slowing down metabolic processes, which can alter the gas levels and pH of the blood. This is crucial for obtaining accurate and reliable ABG results.

A (Collecting the specimen in an SST) YOUR ANSWER

Serum separator tubes (SST) are not suitable for ABG analysis as they are designed for serum collection, which requires coagulation. ABG specimens must be collected in heparinized syringes to prevent clotting and maintain the sample's gaseous composition, making SST inappropriate for this purpose.

B (Placing the specimen in ice) CORRECT

This action is indeed appropriate because cooling the specimen slows metabolic activity and prevents changes in pH and gas concentrations, ensuring that the ABG results reflect the blood's true physiological state at the time of collection.

C (Collecting the specimen in sodium citrate) YOUR ANSWER

Sodium citrate is an anticoagulant used primarily for coagulation studies and is not appropriate for ABG analysis. ABG specimens should ideally be collected in heparinized syringes to prevent coagulation and ensure accurate measurement of gases and pH.

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

While light exposure can affect some laboratory tests, ABG specimens are not typically sensitive to light. The priority is to maintain the sample's temperature and prevent metabolic changes, making this action less relevant for preserving ABG integrity compared to cooling the specimen.

Conclusion

Transporting an ABG specimen requires specific actions to maintain its integrity, with the most critical being placing the specimen in ice to inhibit metabolic activity. Other options, such as using unsuitable collection tubes or anticoagulants, can lead to inaccurate results. Proper handling ensures accurate assessment of respiratory and metabolic conditions, which are vital for patient care.

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