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Arterial Blood Sampling Error Prevention

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Arterial Blood Sampling Error Prevention

Key Points

  • ABG results are highly sensitive to collection and handling errors.
  • Common preventable errors include air contamination, venous draw instead of arterial draw, and heparin/mixing problems.
  • Delayed specimen transport can significantly reduce result reliability.
  • If timely analysis is not available, place the sample on ice according to laboratory policy.

Equipment

  • Pre-heparinized arterial syringe
  • Labeling and transport supplies
  • Immediate transport pathway to analysis location
  • Quality-check documentation workflow

Procedure Steps

  1. Confirm arterial site selection and verify true arterial sampling before specimen collection.
  2. Use pre-heparinized syringe with correct heparin amount for sample volume.
  3. Minimize air entry during and after sample collection.
  4. Expel visible air bubbles promptly, then cap syringe securely before transport.
  5. Mix sample appropriately after draw to distribute heparin and reduce clot risk.
  6. Inspect specimen promptly for visible quality concerns before dispatch.
  7. Label sample immediately and accurately at bedside, including collection time and current oxygen support setting (FiO2 or oxygen flow) when required by policy.
  8. Transport specimen without delay to preserve physiologic validity; if analysis cannot occur within about 30 minutes, place specimen on ice per laboratory protocol.
  9. Communicate any suspected collection issue before interpretation decisions are made.
  10. Document collection time, handling steps, and any quality concerns.

Common Errors

  • Air in sample → altered gas values and misinterpretation risk.
  • Venous rather than arterial specimen → invalid ABG decision support.
  • Incorrect heparin use or poor mixing → sample integrity compromise.
  • Delayed transport → degraded reliability of blood gas results.

Graph View