Preanalytical Considerations: Physiological Variables

Question 1

High Altitude: RBC increase or decrease

Answer 1

Increase

Question 2

High Altitude: Hemoglobin and Hematocrit levels

Answer 2

Increase

Question 3

High Altitude: Plasma renin

Answer 3

Decrease

Question 4

High Altitude: Uric acid

Answer 4

Increase

Question 5

High Altitude: Urinary creatinine

Answer 5

Decrease

Question 6

A condition in which blood components cannot easily leave the bloodstream become concentrated in the smaller plasma volume.

Answer 6

Hemoconcentration

Question 7

What causes hemoconcentration?

Answer 7

Dehydration

Question 8

Analytes that increase during dehydration

Answer 8

RBC, Enzyme, Iron, Calcium, Sodium, and Coagulation factors

Question 9

Analytes that are elevated in patients on high-protein diets

Answer 9

Ammonia, Urea, and Uric acid

Question 10

Analyte levels that have been shown to increase with the consumption of consumption of beverages containing caffeine

Answer 10

Cortisol and Adrenocorticotropic hormone (ACTH) l

Question 11

What analyte increases when ingesting carbohydrates or sugar-laden substances?

Answer 11

Glucose

Question 12

What can decrease when drinking excessive amounts of water and other fluids?

Answer 12

Hemoglobin