Difficulty: Easy

Average Score: 100%

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

Rationale

Placing the specimen in ice.

Transporting an arterial blood gas (ABG) specimen requires it to be chilled to preserve its integrity and prevent metabolic changes that can affect the accuracy of the results. Placing the specimen on ice slows down cellular metabolism, thus maintaining the appropriate levels of gases and electrolytes.

A (Collecting the specimen in an SST) YOUR ANSWER

A serum separator tube (SST) is not suitable for ABG analysis because it is designed for serum testing rather than preserving the gas levels in whole blood. ABG specimens must be collected in heparinized syringes to prevent coagulation and maintain accurate gas measurements, which an SST does not facilitate.

C (Collecting the specimen in sodium citrate) YOUR ANSWER

Sodium citrate is an anticoagulant used primarily for coagulation studies, not for ABG analysis. The presence of sodium citrate can interfere with the measurement of blood gases, as it alters the pH and can affect the accuracy of the results. Therefore, it is inappropriate for transporting ABG specimens.

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

While light exposure can impact some laboratory tests, it is not a primary concern for ABG specimens. These specimens are more critically affected by temperature changes and metabolic activity. Thus, while a light-resistant package may be useful for some tests, it does not address the specific needs of ABG transport.

Conclusion

Proper handling and transport of ABG specimens are crucial for accurate results, with cooling on ice being the most effective method to maintain sample integrity. Other collection methods or packaging choices, such as using SSTs, sodium citrate, or light-resistant packages, do not adequately address the metabolic stability needed for reliable ABG analysis. Understanding these requirements ensures that clinicians receive accurate and timely information for patient care.

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