1.6 Pre-analytical errors include the following, except:
A. Patient-related aspects eg. posture
B. Controls which are out of range
C. Collection-related aspects eg. haemolysis
D. Processing-related aspects eg. clotting time
E. Storage-related aspects eg. wrong temperature
1.7 Analytical sensitivity of a test method is the ability of the test to:
A. Only test positive for the analyte being investigated
B. Report true positive results
C. Predict the positive results in patients who have the disease
D. Predict the negative results in patients who do not have the disease
QUESTION 2
[7]
Indicate whether the following statements are TRUE or FALSE.One mark for each
correct answer.
2.1 Most errors in the clinical laboratory are in the analytical phase.
2.2 The laboratory is not responsible for the preparation of the patient and the
correct collection of blood samples for analysis.
2.3 When a phlebotomist collects a blood sample, she must first write the name of
the patient on the Vacutainer before collecting the sample.
2.4 All patient samples handled in the laboratory should be treated as if they are
infectious.
2.5 It takes 20-30 minutes for a clot to form at room temperature, unless a clot
activator is used.
2.6 If serum is separated too quickly, micro-clots and fibrinogen may be present.
2.7 If serum is not removed in a timely fashion, WBC and RBCwill begin to metabolise
glucose in the serum.
3