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HelpTest Code LAB109 Stool pH
Clinical System Name
Stool pH
Synonyms
LAB109
PH ST
Feces - pH
Feces pH
Stool - pH
Stool pH
Sample Requirements
Specimen: Liquid Stool
Container(s): Sterile Screw-Capped Container (No diapers).
Preferred Vol: 1 gram stool
Minimum Vol: 1 gram stool
Note: Deliver to the Lab within 2 hours of specimen collection.
Processing Instructions
Reject due to: Formed or soft stool, insufficient quantity of stool, Stools sent in diapers, Stool diluted with urine or water, Age of specimen
Spin: N
Aliquot: N
Storage location: Core 5 Refrigerator
Off-site collection: Collect specimen in Sterile Screw-Capped Container. Deliver to the Lab within 2 hours of specimen collection.
Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| Stool | RT |
≤ 4 h |
| Stool |
2-8 C |
≤ 4 h |
|
-20 C or -70 C |
N |
Availability
| STAT | Performed | TAT |
|---|---|---|
| Y | 24/7 | 1 h |
Performing Laboratory
Seattle Children's Laboratory
Department
Department: Core Chemistry
Phone Number: 206-987-2617 (Client Services)
CPT Codes
83986
Methodology
Method: Nitrazine (sodium dinitro-phenylazonaphthol disulfonate) as an indicator dye.
Analytical Volume: 1 gram stool
Reference Range
| Age | Normal |
| 1 d - Adult | 5.5 - 7.5 |
Description
Fecal pH is a useful measurement in the diagnosis of intestinal disacchariadase deficiency. The stools are usually acid having a pH of 5.5 or less due to increased excretion of lactic acid.