Normal Lab values for adults

Question 1

Osmolality

Answer 1

280-300 mOsm/kg (280-300 mmil/kg H20)

Question 2

Sodium (Na+)

Answer 2

136-145 mEq/L

Question 3

Potassium (K+)

Answer 3

3.5-5.0 mEq/L

Question 4

Chloride (Cl-)

Answer 4

98-106 mEq/L

Question 5

Total CO2

Answer 5

22-30 mEq/L

Question 6

Bicarbonate (HCO3-)

Answer 6

Arterial 22-26 mEq/L

Venous 24-30 mEq/L

Question 7

Total calcium (Ca2+)

Answer 7

8.4-10.5 mg/dL

Question 8

Ionized calcium (Ca2+)

Answer 8

4.5-5.3 mg/dL

Question 9

Magnesium (Mg2+)

Answer 9

1.5-2.5 mEq/L

Question 10

Phosphate

Answer 10

2.7- 4.5 mg/dL

Question 11

Anion gap

Answer 11

5-11 mEq/L

Question 12

pH

Answer 12

7.35-7.45

Question 13

PaCo2

Answer 13

35-45 mm Hg

Question 14

PaO2

Answer 14

80-100 mm Hg

Question 15

O2 Sat

Answer 15

95%-100%

Question 16

Base excess

Answer 16

-2 to +2 mmEq/L