To maintain the integrity of an ABG specimen collected in a plastic syringe, it should be

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Multiple Choice

To maintain the integrity of an ABG specimen collected in a plastic syringe, it should be

Post-collection stability of an arterial blood gas sample hinges on temperature to slow metabolic changes. After collection, blood cells continue to respire, consuming oxygen and producing carbon dioxide, which shifts the pH and gas tensions away from the patient’s true values. Transporting the specimen at body temperature (37°C) helps keep these metabolic processes in a state that best represents the blood as it was at the time of draw, minimizing changes in PaO2, PaCO2, and pH until analysis. If the sample were kept at cooler temperatures or at room temperature, metabolic activity could alter the gas measurements more quickly, leading to inaccurate results. Protection from light is not relevant for these measurements, and while prompt analysis is important, the specific choice of 37°C is about preserving the gas values by matching in vivo conditions during transport.

Post-collection stability of an arterial blood gas sample hinges on temperature to slow metabolic changes. After collection, blood cells continue to respire, consuming oxygen and producing carbon dioxide, which shifts the pH and gas tensions away from the patient’s true values. Transporting the specimen at body temperature (37°C) helps keep these metabolic processes in a state that best represents the blood as it was at the time of draw, minimizing changes in PaO2, PaCO2, and pH until analysis. If the sample were kept at cooler temperatures or at room temperature, metabolic activity could alter the gas measurements more quickly, leading to inaccurate results. Protection from light is not relevant for these measurements, and while prompt analysis is important, the specific choice of 37°C is about preserving the gas values by matching in vivo conditions during transport.

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