Normal Lab Values

Question 1

Sodium

Answer 1

135-145 mEq/L

Question 2

Potassium

Answer 2

3.5-5 mEq/L

Question 3

Bicarbonate

Answer 3

22-28 mEq/L

Question 4

Serum Anion Gap

Answer 4

8-12

Question 5

Serum Osmolality

Answer 5

275-295 mOsmol/kg

Question 6

Calculated serum osmolality

Answer 6

2Na +BUN/2.8 + glucose/18

Question 7

Osmolol gap

Answer 7

measured Posm - calculated Posm < 10

Question 8

Calcium

Answer 8

8.4-10.2 mg/dL

Question 9

Corrected serum calcium

Answer 9

0.8 (normal albumin - serum albumin) + calcium

Question 10

Phosphate

Answer 10

3-4.5 mg/dL (higher in babies)

Question 11

Uric acid

Answer 11

3-8.3 mg/dL

Question 12

FENa

Answer 12

(urinary sodium x plasma creatinine) / (plasma sodium x urinary creatinine)

Question 13

Urine anion gap

Answer 13

Na + K - Cl

Question 14

Microalbuminuria

Answer 14

< 30 mcg/mg

Question 15

Urine protein to creatinine ratio

Answer 15

< 0.2

Question 16

Acute respiratory acidosis

Answer 16

1 mEq/L increase in bicarb for every 10 mmHg rise in PaCO2

Question 17

Chronic respiratory acidosis

Answer 17

3.5 mEq/L increase in bicarb for every 10 mmHg rise in PaCO2

Question 18

Acute respiratory alkalosis

Answer 18

2 mEq/L fall in bicarb for every 10 mmHg fall in PaCO2

Question 19

Chronic respiratory alkalosis

Answer 19

5 mEq/L decrease in bicarb for every 10 mmHg fall in PaCO2

Question 20

Urine pH

Answer 20

5-8.5

Question 21

Specific gravity

Answer 21

1.012 to 1.030