Which handling practice is essential to preserve arterial blood gas sample integrity?

Prepare for the CAMLPR Specimen Collection Competency Test. Practice with diverse question sets including multiple-choice and flashcards. Each question includes hints and explanations to help you become proficient before the exam.

Preserving arterial blood gas sample integrity hinges on limiting time- and temperature-related changes after draw. Blood cells continue to metabolize O2 and CO2, and the pH can shift if the sample isn’t kept stable, so cooling slows these metabolic changes and helps keep the gas values close to what’s in the patient. Analyzing the sample promptly further minimizes alteration from the time of collection. Avoiding air bubbles prevents diffusion or mixing with ambient air, which would skew partial pressures of O2 and CO2. Shaking the sample introduces more air, and storing at room temperature or freezing would either allow further metabolic changes or cause cellular damage and gas solubility problems, compromising accuracy. Keeping the sample on ice and analyzing it immediately with careful handling to prevent air exposure is essential.