MLAB 2401
Clinical Chemistry
MLAB 2401: Clinical Chemistry
Admission Ticket #2: Quality Control
Points= 11
Topics:
Lecture- Quality Control, Quality Assessment and Statistics
Lab- Quality Control
Student Name:_____________________________________________
Each question is worth one point, unless notated.
1.
How is a shift different than a trend?
2. Results obtained from the Level 2 QC sample for glucose are as follows:
 Mean= 265 mg/dL
 1 SD= + 15 mg/dL
a. What are the 95% confidence limits?
b. Calculate the coefficient of variation.
3.
From the chemist’s point of view, explain the difference between a “standard” and a “control”.
4. A gaussian distribution is usually
a. Rectangular
b. Bell-shaped
c. Uniform
d. Skewed
5. The following chloride(mmol/L) results were obtained using an analyzer:
106
111
104
106
112
115
127
85
110
108
83
119
105
106
108
120
100
107
110
109
110
109
114
102
a. What is the mean?
b. What is the median?
6.
Which Westgard rule detects random error?
AT #2 :QC
Page 1
MLAB 2401
7.
Clinical Chemistry
Discuss two corrective measures to troubleshoot “out of control” QC.
8. Explain the purpose of the delta check.
9. Differentiate between the AMR and CRR.
AT #2 :QC
Page 2