Sunday, October 3, 2010

CLINICAL CHEMISTRY 1 EXAM REVIEW QUESTIONS

PROBLEM SOLVING :

1. WRITE DOWN FORMULA 1ST.
2. SHOW COMPUTATIONS.
3. ENCLOSE ANSWERS IN BOXES.

ATOMIC WEIGHTS:

Na = 23 H = 1 S = 32
Cl= 35.5 O = 16

1. If you weigh 10 g NaCl solution and dissolve it in 500 ml of diluent. ( 5 pts. each)

A. What is the Molarity?
B. What is the Normality?
C. What is the percent solution?

2. What is the Molarity of a 1 N H2SO4 solution? ( 5 pts.)
3. What is the dilution if you add 0.25 ml of serum to 6.0 ml of diluent? ( 5 pts.)
4. How would you prepare 1:5 serum dilution? ( 5 pts.)
5. How would you prepare a 0.85 % NaCl solution? (5 pts.)
6. You are asked to prepare 200 ml of the following standard concentrations from a 30 mg/dL standard stock solution: Tabulate volume of solute and solvent and also dilution. ( 5 pts. each)

A. 5 mg/dL C. 15 mg/dL
B. 10 mg/dL D. 20 mg/dL
E.25 mg/dL


7. Construct a Levey-Jennings chart based on the following data:
(use a graphing paper) ( 10 pts.)

Control values standard values unknown values

Day 1 3.2 mmol/L 5.4 mmol/L 6.7 mmol/L
Day 2 4.5 mmol/L 2.6 mmol/L 4.2 mmol/L
Day 3 4.0 mmol/L 5.0 mmol/L 3.8 mmol/L
Day 4 3.0 mmol/L 3.5 mmol/L 5.0 mmol/L
Day 5 4.2 mmol/L 2.5 mmol/L 6.7 mmol/L
Day 6 3.5 mmol/L 5.5 mmol/L 5.5 mmol/L
Day 7 4.5 mmol/L 6.0 mmol/L 5.2 mmol/L
Day 8 4.1 mmol/L 5.5 mmol/L 6.7 mmol/L
Day 9 4.3 mmol/L 3.6 mmol/L 5.4 mmol/L
Day 10 3.0 mmol/L 5.2 mmol/L 4.6 mmol/L
Day 11 4.1mmol/L 4.4 mmol/L 2.7 mmol/L
Day 12 6.5 mmol/L 2.6 mmol/L 5.2 mmol/L
Day 13 4.0 mmol/L 5.0 mmol/L 4.8 mmol/L
Day 14 2.8 mmol/L 5.5 mmol/L 5.0 mmol/L
Day 15 4.2 mmol/L 2.5 mmol/L 7.7 mmol/L
Day 16 5.5 mmol/L 5.5 mmol/L 2.5 mmol/L
Day 17 7.5 mmol/L 7.0 mmol/L 3.2 mmol/L
Day 18 3.1 mmol/L 5.5 mmol/L 2.7 mmol/L
Day 19 4.3 mmol/L 4.6 mmol/L 5.4 mmol/L
Day 20 5.2 mmol/L 5.2 mmol/L 3.6 mmol/L


Based on the constructed CHART: ( 10 pts.)

1. Determine if the control values are “in control” or “out of control”
2. Are there any Westgard Rules violated? If there are, encircle with red ink the violations.
3. If there are violations, Identify whether “trend” or “shift”.
4. What appropriate measures could be adapted to correct the error?


ESSAY : ANSWER CONCISELY BUT BRIEFLY. ( 5 PT. each)

1.DISCUSS EACH OF THE PROCESSES INVOLVED IN QUALITY ASSURANCE PROGRAM
2.DISCUSS THE UNIVERSAL PRECAUTION.
3.DISCUSS ONE SPECIFIC WAY IN WHICH YOU CAN PERSONALLY ENSURE THE RELIABILITY OF YOUR RESULTS.


1. TRANSCRIPTION: ( 1 PT. EACH)

1. FBS 8. RBS
2. NPO 9. mmol/L
3. RBS 10. NADPH
4. stat 11. nm
5. cc 12. mg %
6. QCP 13. mEq/L
7. mL 14. mg/dL


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