Preanalytical Errors
When does a preanalytical error occur?
Error in testing occurring PRIOR to the actual analysis of a specimen
UP!
Most common needle gauge for venipuncture in adults
21 gauge
Syringe and transfer device
Full figure 8
Inversion
Fasting length
8-12 hours
Gauge used for smaller or fragile veins in adults
22 or 23 Gauge
Typical volume of tubes used for adults
3-5 mL
In relation to medication levels - the point at which the medication is at its lowest level in the bloodstream
Trough
What is a basal state?
1 minute
Gauge used for pediatric patients
25 Gauge
Total Blood Volume equation for blood taken from pediatric patient in a 24 hour period
TBV=weight (kg)×80 mL/kg
Maximum puncture depth for children
2 mm
Name & DOB
Winged collection set is also known as.....
Butterfly needle
The needle is placed where after the blood draw.
SHARPS CONTAINER!
1-2 mL
1.8mm-2.2mm
FIVE checks to reduce preanalytical errors
Correct conditions, correct supplies, correct tubes, correct order, correct handling
Tourniquet is placed where in relation to the PBT blood draw location.
ABOVE
Needle size needed for a blood donation AND why!
16 G - Due to the large amount collected
Microcollection tube volume (hint: volume in microliters)
125-600 microliters
On a capillary specimen, the first blood is most similar to what....
Arterial blood