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Related Experiment Videos

Blood sample collection from a peripheral catheter system compared with phlebotomy.

S Seemann1, A Reinhardt

  • 1University of Phoenix, USA.

Journal of Intravenous Nursing : the Official Publication of the Intravenous Nurses Society
|February 19, 2002
PubMed
Summary

Blood draws from saline locks are a viable alternative to traditional venipuncture for certain hospital patients. This method showed no significant differences in key ion assays, making it suitable for specific clinical situations.

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Area of Science:

  • Clinical Chemistry
  • Medical Devices
  • Patient Care

Background:

  • Venipuncture, a common hospital procedure, can cause patient pain and discomfort.
  • Peripheral vascular saline locks offer a potential alternative for blood sample collection.
  • Validating the accuracy of samples obtained via saline locks is crucial for clinical decision-making.

Purpose of the Study:

  • To compare the accuracy of serum chemistry tests from saline lock samples versus traditional phlebotomy.
  • To assess the feasibility and limitations of using saline locks for blood collection in a hospital setting.

Main Methods:

  • Concurrent blood samples were collected from existing peripheral vascular saline locks and by venipuncture.
  • Serum chemistry tests, specifically 17 sets of ion assays, were performed on both sample types.

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  • Statistical analysis was used to compare the results between the two collection methods.

    • Main Results:

    • No clinically significant differences were observed in 17 sets of ion assays between the two methods.
    • Potassium and chloride determinations showed no statistically significant differences.
    • A 21% rate of sample hemolysis and collection difficulties were noted with the saline lock method.

    Conclusions:

    • Blood sampling from peripheral saline locks is a valid alternative to venipuncture for specific serum chemistry tests.
    • This method is best suited for inpatients requiring frequent blood sampling during short-term investigations or crisis management.
    • Consideration of sample hemolysis and collection challenges is necessary when implementing this technique.