ABPath Chemical Pathology 2

Question 1

Which analyte is most affected by prolonged tourniquet application during venipuncture?

Accepted Answer

Potassium

Answer

Sodium

Answer

Chloride

Answer

Glucose

Question 2

An elevated anion gap metabolic acidosis with high osmolar gap suggests ingestion of which substance?

Accepted Answer

Ethylene glycol

Answer

Aspirin

Answer

Ammonium chloride

Answer

Acetazolamide

Question 3

Which is the most sensitive and specific biomarker for acute myocardial infarction?

Accepted Answer

Cardiac troponin I/T

Answer

CK-MB

Answer

Myoglobin

Answer

LDH

Question 4

A low TSH with elevated free T4 is most consistent with which condition?

Accepted Answer

Primary hyperthyroidism

Answer

Primary hypothyroidism

Answer

Secondary hypothyroidism

Answer

Euthyroid sick syndrome

Question 5

Which finding best confirms a diagnosis of diabetes mellitus in an asymptomatic patient?

Accepted Answer

HbA1c of 6.8% confirmed on repeat testing

Answer

Random glucose of 150 mg/dL

Answer

Fasting glucose of 115 mg/dL

Answer

Single HbA1c of 6.0%

Question 6

Pseudohyponatremia is classically caused by which of the following?

Accepted Answer

Severe hyperlipidemia or hyperproteinemia

Answer

Adrenal insufficiency

Answer

SIADH

Answer

Diuretic use

Question 7

Which enzyme elevation is most specific for acute pancreatitis?

Accepted Answer

Lipase

Answer

Amylase

Answer

ALT

Answer

Alkaline phosphatase