The Importance of the Order Of Draw In Collecting Multiple Blood Samples

Summary

• Ensures accuracy of Test Results
• Prevents cross contamination
• Minimizes risk of sample hemolysis

When it comes to collecting multiple blood samples from a patient, healthcare professionals must follow a specific protocol known as the order of draw. This protocol dictates the specific order in which blood samples should be collected to ensure accurate Test Results and maintain the integrity of the samples. In this article, we will explore why the order of draw is necessary when collecting multiple blood samples.

Importance of the Order of Draw

Ensures Accuracy of Test Results

One of the primary reasons why the order of draw is necessary when collecting multiple blood samples is to ensure the accuracy of Test Results. Different types of blood collection tubes contain different additives that are designed to preserve the integrity of the blood sample and prevent clotting. If the tubes are not collected in the correct order, additives from one tube can contaminate the sample in the next tube, leading to inaccurate Test Results.

Prevents Cross Contamination

Following the order of draw helps prevent Cross-Contamination between blood samples. For example, if a tube containing an Anticoagulant is drawn after a tube that does not contain an anticoagulant, the additive in the first tube can contaminate the second tube, leading to inaccurate Test Results. By following the proper order of draw, healthcare professionals can minimize the risk of Cross-Contamination and ensure the integrity of each blood sample.

Minimizes Risk of Sample Hemolysis

Hemolysis, the breakdown of red blood cells, can occur if blood samples are collected improperly or handled incorrectly. Following the order of draw helps minimize the risk of sample hemolysis by ensuring that samples are collected in a specific sequence that minimizes trauma to the blood cells. This ultimately helps preserve the quality of the blood sample and ensures accurate Test Results.

Proper Order of Draw

While the specific order of draw may vary slightly depending on the healthcare facility or testing laboratory, there are some general guidelines that healthcare professionals typically follow when collecting multiple blood samples:

1. Start with Blood Culture tubes, as they are the most critical for detecting bloodstream infections.
2. Follow with tubes containing additives such as anticoagulants or clot activators.
3. Collect tubes that do not contain additives, such as serum tubes, last.

By following these guidelines and adhering to the proper order of draw, healthcare professionals can ensure the accuracy of Test Results, prevent Cross-Contamination, and minimize the risk of sample hemolysis when collecting multiple blood samples from a patient.

Conclusion

The order of draw is a crucial protocol that must be followed when collecting multiple blood samples from a patient. By following the proper sequence for collecting blood samples, healthcare professionals can ensure the accuracy of Test Results, prevent Cross-Contamination between samples, and minimize the risk of sample hemolysis. Ultimately, adherence to the order of draw helps maintain the integrity of the blood samples and ensures that patients receive accurate and reliable Test Results.

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