MLPAO MLPAO Medical Laboratory Calculations

Question 1

A patient's serum glucose is reported as 5.6 mmol/L. What is the equivalent value in mg/dL?

Accepted Answer

100.8 mg/dL

Answer

56.0 mg/dL

Answer

112.0 mg/dL

Answer

89.6 mg/dL

Question 2

You need to prepare a 1:10 dilution of a patient serum sample. If the final volume required is 5 mL, how much serum do you need?

Accepted Answer

0.5 mL

Answer

1.0 mL

Answer

0.1 mL

Answer

2.5 mL

Question 3

A urine specific gravity reading is 1.025. Which of the following best describes this specimen?

Accepted Answer

Concentrated urine with high solute content

Answer

Dilute urine with low solute content

Answer

Normal hydration status

Answer

Hemolyzed specimen requiring recollection

Question 4

A laboratory uses a control with a target value of 4.0 mmol/L and a standard deviation (SD) of 0.1 mmol/L. What is the 2-SD warning limit?

Accepted Answer

3.8–4.2 mmol/L

Answer

3.9–4.1 mmol/L

Answer

3.7–4.3 mmol/L

Answer

4.0–4.2 mmol/L

Question 5

A blood specimen collected in a plain red-top tube at 9:00 AM must be centrifuged within 30 minutes of collection. What is the latest acceptable centrifugation time?

Accepted Answer

9:30 AM

Answer

9:45 AM

Answer

10:00 AM

Answer

9:15 AM

Question 6

A technologist performs a serial dilution starting with a 1:2 dilution, followed by three additional 1:2 dilutions. What is the final dilution factor of the last tube?

Accepted Answer

1:16

Answer

1:8

Answer

1:32

Answer

1:10

Question 7

A urinalysis dipstick shows a glucose reading of 2+ and protein reading of trace. What should the technologist do next?

Accepted Answer

Confirm with a microscopic examination and notify the physician if glucose is significantly elevated

Answer

Report the results immediately without further testing

Answer

Repeat only the protein test on a new dipstick

Answer

Discard the specimen and request a new sample