Normal Laboratory Values

Question 1

Plasma Sodium

Answer 1

Na = 140 mEq/L

Question 2

Plasma Potassium

Answer 2

K = 4.5 mEq/L

Question 3

Plasma Chloride

Answer 3

Cl = 104 mEq/L

Question 4

Plasma CO2

Answer 4

CO2 = 27 mEq/L

Question 5

Plasma Glucose (Fasting)

Answer 5

Glu = 90 mg/dL

Question 6

Plasma Creatinine

Answer 6

Cr = 1.0 mg/dL

Question 7

BUN

Answer 7

BUN = 12 mg/dL

Question 8

Plasma Phosphorus

Answer 8

P = 4.0 mg/dL

Question 9

Plasma Calcium

Answer 9

Ca = 9.5 mg/dL

Question 10

Plasma Cholesterol

Answer 10

Cholesterol = 140-200 mg/dL

Question 11

Plasma Osmolality

Answer 11

285 mOsm/kg H2O

Question 12

Plasma Anion Gap

Answer 12

Anion Gap = 9mEq/L

Question 13

Urine sodium

Answer 13

Low (under 10) sodium suggest increased tubular reabsorption; high (over 40) suggests decreased tubular reabsorption

Question 14

Urine Potassium

Answer 14

Relavent only in light of plasma K+.

Question 15

Urine Creatinine

Answer 15

Viewed in concert with plasma creatinine (Ucr/Pcr) Over 20 suggests high water reabsorption, under 10 suggests low water reabsorption

Question 16

Urine osmolality range

Answer 16

~50 - 1000 mOsm/kg H2O (Plasma is ~285)

Question 17

Urine Specific gravity

Answer 17

1.010 is isotonic (less is dilute, more is concentrated)

Question 18

Low pH limit

Answer 18

Less than 5.2 if faced with increased acid load

Question 19

ABG pH

Answer 19

pH = 7.42 (sea level)

Question 20

ABG O2

Answer 20

O2 = 94 (sea level)

Question 21

ABG CO2

Answer 21

CO2 = 38 (sea level)

Question 22

ABG HCO3-

Answer 22

HCO3- = 24