Specimen Handeling Flashcards
Unique identifier number used for cataloging a sample in the laboratory
Accession number
Mist of droplet
Aersol
Portions of a sample
Aliquots
Separation of components of a sample based on density by using a machine that spins at a very high speed
Centrifuge
Sample transport system in which samples are carried in a sealed contained within a network of tubes
Pneumatic tube system
Criteria for specimen rejection include the following
Inadequate or improper identification Hemolysis incorrect tube for the test ordered Tubes used past their expiration date and adequate ratio of blood to additive insufficient volume for testing drawing specimens at the wrong time contaminated specimen and proper handling bring a sample to the laboratory outside the appropriate time frame
Aliquots are not to be
Pored off because this may cause splashing
24 hour urine samples
Must have their volume measured and recorded before aliquoting
In order to remove a stopper
Play say 4X4 inch piece of Gauze over the top and pull the stopper
Major risk of a stopper removal is the formation
Aersol Which is a microscopic mist of blood
The most important principle of a centrifuge
Is that every sample must be balanced by another of equal weight
Complete clotting May take
30-45mins at room temperature
Samples with Clot activators
Clot within 30 minutes if thrombi and is used to complete clotting may occur within five minutes
The samples that arrive at the laboratory from outside of the hospital
Should not be centrifuges bc of lack of time
Some samples need to be frozen to
-20c - -70c Examples include serum and plasma always freeze in plastic tubes that are designed for low temperatures
Billy Rubin is the most common light sensitive and a light others include
Vitamin B 12 carotene folate in urine porphyrin
Samples I need to be chilled include
Pyruvate ammonia and lactic acid
He’ll warmers are effective up to
30 minutes
Some test require warming of the sample in
37c Heat block before testing
Gray top tubes can be held
For 24 hours at room temperature and for 48 hours at 2°C to 8°C
Complete blood count or EDTA
Are stable for 24 hours at room temp
Automated differential’s
Must be performed within six hours of specimen collection
Blood some smears must be
Done within one hour
On centrifuged blood sample should be
Delivered to the lab within 45 minutes
No more than
Two hours should pass between collection and separation by centrifuging of cells from plasma or serum
