Item Value
Test name Gastric Acidity, Titratable
Available Stat? No
Turn around times Test run Tuesday and Friday. Turnaround time: 2-6 days.
Performed by Quest
Patient Preparation Procedure must be scheduled in advance with the GI motility lab, 400 Parnassus, room A6102, x39383.

Contact the GI motility lab regarding instructions for ordering, patient preparation, etc.
Normal range
Free HCl output 0.0-40.0 mEq/L


Total (titratable) acidity 10.0-60.0 mEq/L


Basal acid output (BAO) is normally < 5 mmol/h and peak output 5-40 mmol/h.
Container type Clean container or urine cup
Amount to Collect See preferred volume
Collection Instructions Record the volume of each sample and submit an aliquot of 10 mL (min. 6 mL) to the laboratory for titration. If the volume of a specimen is less than 6 mL, the specimen can be pooled with the specimen from the next collection interval. Do NOT pool pre- and post-stimulation specimens.
Sample type Gastric fluid

If you have additional questions regarding this test, please call: 415-353-1667