Question 27

Placing the specimen in ice

Placing the specimen in ice is the appropriate action when transporting a specimen for arterial blood gas (ABG) analysis. This practice helps to preserve the integrity of the sample by slowing down metabolic processes that could alter the gas levels before analysis.

A) Collecting the specimen in an SST

Collecting the specimen in a serum separator tube (SST) is not appropriate for ABG analysis, as SSTs are designed for serum tests and may not maintain the necessary conditions for accurate gas measurements. ABG specimens should typically be collected in heparinized syringes.

B) Placing the specimen in ice

Placing the specimen in ice is the correct action, as it helps to minimize the effects of cellular metabolism and prevent changes in pH, pCO2, and pO2 levels during transport to the laboratory. This ensures the accuracy of the results.

C) Collecting the specimen in sodium citrate

Collecting the specimen in sodium citrate is incorrect for ABG analysis. Sodium citrate is an anticoagulant used for coagulation studies and can interfere with the analysis of blood gases by altering the sample composition.

D) Inserting the specimen in a light-resistant package

Inserting the specimen in a light-resistant package is not specifically relevant to ABG analysis. While light protection may be important for some other laboratory tests, it does not directly impact the preservation of blood gas measurements.

Conclusion

Placing the specimen in ice is essential for maintaining the accuracy of ABG analysis, as it prevents metabolic changes that could compromise results. The other options fail to provide the necessary conditions for proper analysis, highlighting the importance of correct specimen handling in laboratory testing.