Gastric fluid reference intervals

TYPICAL REFERENCE INTERVALS

COMPONENT

CONVENTIONAL UNITS

FACTOR

RECOMMENDED SI UNITS

Fasting residual volume

20-100 mL

0.001

0.02-0.10 L

pH

>2.0

1

>2.0

Basal acid output (BAO)*

0-6 mEq/h

1

0-6 mmol/h

Maximum acid output (MAO)

(after histamine stimulation)

5-40 mEq/h

1

5-40 mmol/h

BAO/MAO ratio

>0.4

1

>0.4