Medical Laboratory Technician Clinical Chemistry Procedures Questions and Answers

Question 1

A patient's blood gas results are as follows: pH = 7.25, pCO2 = 60 mmHg, HCO3- = 24 mEq/L. How would you classify this acid-base disturbance?

Accepted Answer

Respiratory Acidosis

Answer

Metabolic Acidosis

Answer

Respiratory Alkalosis

Answer

Metabolic Alkalosis

Question 2

A physician orders a creatinine clearance test to evaluate a patient's kidney function. The following results are obtained:
- Serum creatinine: 1.5 mg/dL
- Urine creatinine: 120 mg/dL
- Urine volume: 1440 mL/24 hours
- Body Surface Area (BSA): 1.73 m²

Using the standard formula, what is the calculated creatinine clearance in mL/min?

Accepted Answer

80 mL/min

Answer

60 mL/min

Answer

120 mL/min

Answer

100 mL/min

Question 3

Which of the following cardiac markers is the most specific for myocardial infarction and remains elevated for the longest duration after the event?

Accepted Answer

Troponin I

Answer

CK-MB

Answer

Myoglobin

Answer

AST

Question 4

A laboratorian performs an ion-selective electrode (ISE) measurement for electrolytes. The technologist notices that the potassium result is critically high, but the patient has no symptoms of hyperkalemia. A visual inspection of the serum shows significant hemolysis. Which of the following is the most likely explanation for the discrepant result?

Accepted Answer

Intracellular potassium was released from lysed red blood cells

Answer

Instrument malfunction

Answer

Incorrect sample collection tube was used

Answer

The patient was not fasting prior to the blood draw

Question 5

A patient with a history of diabetes has a Hemoglobin A1c (HbA1c) level of 9.0%. This result reflects the patient's average blood glucose level over what period of time?

Accepted Answer

The past 2-3 months

Answer

The past 24 hours

Answer

The past 7 days

Answer

The past 6 months

Question 6

In spectrophotometry, the relationship between the absorbance of a solution and the concentration of the analyte in the solution is described by which of the following laws?

Accepted Answer

Beer's Law

Answer

Charles's Law

Answer

Boyle's Law

Answer

Dalton's Law

A patient's blood gas results are as follows: pH = 7.25, pCO2 = 60 mmHg, HCO3- = 24 mEq/L.How would you classify this acid-base disturbance?

A patient's blood gas results are as follows: pH = 7.25, pCO2 = 60 mmHg, HCO3- = 24 mEq/L.
How would you classify this acid-base disturbance?