Stool reference interals

COMPONENT

SPECIMEN

CONVENTIONAL UNITS

FACTOR

RECOMMENDED SI UNITS

Bile, Qualitative

Random stool

Negative in adults

Positive in children

»

»

Negative in adults

Positive in children

FAT

Stool, 72 h

  • Total Fat

<5 g/24 hr

1

<5 g/d

10-25% of dry matter

0.01

Mass fraction:

0.1-0.25 of dry matter

  • Neutral Fat

1-5% of dry matter

0.01

0.01-0.05 of dry matter

  • Free Fatty Acids

5-13% of dry matter

0.01

0.05-0.13 of dry matter

  • Combined Fatty Acids

5-15% of dry matter

0.01

0.05-0.15 of dry matter

Nitrogen, Total

Stool, 24 h

10% of intake

1-2 g/24h

0.01

71.39

Mass fraction 0.1 of intake

71-143 mmol/d

Trypsin Activity

Random, fresh stool

Positive (2+ to 4+)

»

Positive (2+ to 4+)

UROBILINOGEN

  • Qualitative

Random stool

Positive

»

Positive

  • Quantitative

Stool, 24 h

40-200 mg/24 h

80-280 Ehrlich units/24 hr

1.693

68-339 Ámol/d