Question 66

Placing the specimen in ice

Transporting a specimen for arterial blood gas (ABG) analysis requires specific precautions to ensure the integrity of the sample. Placing the specimen in ice is essential as it helps to slow down metabolic processes, thereby preserving the accuracy of the results.

A) Collecting the specimen in an SST

Collecting the specimen in a serum separator tube (SST) is not appropriate for ABG analysis. SST tubes are designed for serum testing and may not adequately preserve the gas exchange properties that are critical for accurate ABG results.

B) Placing the specimen in ice

Placing the specimen in ice is the correct action when transporting a specimen for ABG analysis. This practice minimizes metabolic activity, which can alter the levels of gases and pH in the sample, ensuring that the results reflect the patient's current physiological state.

C) Collecting the specimen in sodium citrate

Using sodium citrate for collecting ABG specimens is inappropriate. Sodium citrate is an anticoagulant used for coagulation studies and can interfere with the measurement of gases, leading to inaccurate results for ABG analysis.

D) Inserting the specimen in a light-resistant package

While light can degrade certain substances, ABG specimens are not typically affected by light exposure in the same way as other samples. Therefore, placing the specimen in a light-resistant package is unnecessary and does not contribute to the preservation of the sample for ABG analysis.

Conclusion

Placing the specimen in ice is the only action that effectively preserves the integrity of the sample for ABG analysis, ensuring accurate measurements of pH, carbon dioxide, and oxygen levels. Other options either utilize inappropriate collection methods, do not address the metabolic rate of the sample, or are unnecessary for the specific requirements of ABG analysis.