Some laboratory tests are so specialized that they require special collection tubes to prevent erroneous results.
Table 2 describes some examples of special requirements.
Table 2. Special Requirements for Laboratory Tests.Laboratory Test
| Considerations
|
Heavy metals
| Blood collection container material must be free of heavy metals.
|
Tissue typing
| The sample may need to be collected in a preservative solution.
|
Blood cultures
| Specimens must be collected in bottles containing nutrient media to promote the growth of bacteria within the bottle.
|
Genetic studies
| Special tubes may be needed to preserve DNA and/or RNA
|
The phlebotomist is responsible for being aware of special requirements for specific tests. If the correct collection tube is unknown, the phlebotomist must refer to the specimen collection manual or ask the appropriate laboratory worker for information. It is also imperative that the phlebotomist obtain and use only the correct equipment and not substitute something "close." This could affect the test results and the safety of the patient.
