Reference ranges (lab values)

Question 1

sodium (serum)

Answer 1

136 - 145 mEq/L

Question 2

potassium

Answer 2

3.5 - 5.0 mEq/L

Question 3

chloride

Answer 3

95 - 105 mEq/L

Question 4

bicarbonate (ABG)

Answer 4

22 - 26 mEq/L

Question 5

magnesium

Answer 5

1.5 - 2.0 mEq/L

Question 6

calcium

Answer 6

8.4 - 10.2 mg/dL

Question 7

phosphate

Answer 7

2.5 - 4.5 mg/dL

Question 8

arterial pH (ABG)

Answer 8

7.35 - 7.45

Question 9

PaCO2 (ABG)

Answer 9

35 - 45 mmHg

Question 10

PaO2 (ABG)

Answer 10

80 - 100 mmHg

Question 11

O2 saturation (ABG)

Answer 11

95 - 100%

Question 12

glucose (blood, fasting)

Answer 12

70 - 110 mg/dL

Question 13

triglycerides (low risk)

Answer 13

< 150 mg/dL

Question 14

cholesterol (low risk)

Answer 14

< 200 mg/dL

Question 15

HDL (low risk)

Answer 15

> 60 mg/dL

Question 16

LDL (optimal)

Answer 16

< 100 mg/dL

Question 17

ESR

Answer 17

0 - 40 mm/hr

Question 18

CRP

Answer 18

0 - 0.5 mg/dL

Question 19

BUN

Answer 19

7 - 18 mg/dL

Question 20

creatinine (serum)

Answer 20

0.6 - 1.2 mg/dL

Question 21

sodium (urine)

Answer 21

> 20 mEq/L

Question 22

creatinine (urine)

Answer 22

20 - 350 mg/dL

Question 23

FENa

Answer 23

(UNa/PNa) / (UCr/PCr) = (UNa x PCr) / (UCr x PNa)
< 1% suggests prerenal failure
> 2-3% suggests ATN or intrinsic renal damage

Question 24

WBC count

Answer 24

4500 - 11,000 / µL

Question 25

hemoglobin

Answer 25

13. 5 - 17.5 g/dL (male)

12. 0 - 16.0 g/dL (female)

Question 26

hematocrit

Answer 26

41 - 53% (male)

36 - 46% (female)

Question 27

platelet count

Answer 27

150,000 - 400,000 / µL

Question 28

MCV

Answer 28

80 - 100 µm^3

Question 29

Hb A1c

Answer 29

< 6%

Question 30

cell count (CSF)

Answer 30

0 - 5 / µL

Question 31

glucose (CSF)

Answer 31

40 - 70 mg/dL

Question 32

total protein (CSF)

Answer 32

< 40 mg/dL

Question 33

opening pressure (CSF)

Answer 33

70 - 180 mmH2O

Question 34

total protein (serum)

Answer 34

6.0 - 7.8 g/dL

Question 35

albumin (serum)

Answer 35

3.5 - 5.5 g/dL

Question 36

AST

Answer 36

8 - 20 U/L

Question 37

ALT

Answer 37

8 - 20 U/L

Question 38

total bilirubin

Answer 38

0.1 - 1.0 mg/dL

Question 39

direct (conjugated) bilirubin

Answer 39

0.0 - 0.3 mg/dL

Question 40

CK (total)

Answer 40

25 - 235 U/L

Question 41

CK-MB

Answer 41

0.0 - 5.0 ng/mL

Question 42

TnI

Answer 42

0.00 - 0.15 ng/mL