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Published on: July 13, 2019
Venipuncture versus peripheral catheter: do infusions alter laboratory results?
Victoria Lerma Hambleton1, Ignacio Arribas Gómez1, Francisco A Bernabeu Andreu1
1Alcalá de Henares, Spain.
Journal of Emergency Nursing
|July 7, 2012
Summary
Blood samples from saline lock devices are equivalent to venipuncture for most lab tests, excluding venous blood gases. This method offers a safe, efficient alternative for emergency department patients.
Area of Science:
- Emergency Medicine
- Clinical Pathology
- Nursing Practice
Background:
- Saline solution lock devices are common in emergency departments.
- Venipuncture is the standard for blood sample collection.
- Concerns exist regarding sample contamination from lock devices.
Purpose of the Study:
- To evaluate the analytical equivalence of blood samples from saline lock devices versus venipuncture.
- To determine if saline lock devices are a reliable alternative for routine laboratory testing.
Main Methods:
- Cross-sectional observational study in an emergency department.
- Blood samples collected from saline lock devices and simultaneously via venipuncture.
- Analysis of hematology, biochemistry, venous blood gases, and coagulation parameters.
Main Results:
- High concordance (ICC > 0.9) for hematology, biochemistry, and coagulation.
- Venous blood gas parameters (pH, pCO2, pO2) showed significant differences.
- Differences for most parameters were within acceptable laboratory error limits.
Conclusions:
- Blood samples from peripheral catheters (saline locks) are valid for hematology, biochemistry, and coagulation tests.
- Venous blood gas analysis is not reliable from saline lock devices.
- Utilizing existing peripheral catheters for blood draws is a safe, efficient nursing practice, reducing patient discomfort.
Keywords:
Blood extractionInfusionsLaboratory resultsNursingPeripheral catheterSaline lock deviceVenipunctureMore Related Videos
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