Disaccharidases
- Laboratory
- Quest Diagnostics
- Test code
- 19701
- Specimen
- 5 mg frozen small bowel biopsy collected in a 2 mL cryovial polypropylene screw-cap tube
- Fasting
- Not stated
- LOINC
- 14168-9, 14178-8, 1815-0, 1942-2
- Turnaround
- Set up: Mon-Sat
Laboratory assay overview
Lactase, maltase, palatinase and sucrase are mucosal disaccharidases that are present in normal small intestine and fetal colon. A decrease in the enzyme activity of these disaccharidases has been noted in colonic adenomas, adenocarcinomas and malabsorption. Decreased disaccharidase activity is a good indication of mucosal injury with the exception of lactase.
Quest Diagnostics population reference ranges
Quest Diagnostics calculates these statistical intervals for this specific assay and demographic group, not as universal optimal targets.
| Population | Range |
|---|---|
| Lactase | 15.0-45.5 uM/min/g prot |
| Sucrase | 25.0-69.9 uM/min/g prot |
| Maltase | 100.0-224.4 uM/min/g prot |
| Palatinase | 5.0-26.3 uM/min/g prot |
View complete laboratory reference notes
Lactase | 15.0-45.5 uM/min/g prot Sucrase | 25.0-69.9 uM/min/g prot Maltase | 100.0-224.4 uM/min/g prot Palatinase | 5.0-26.3 uM/min/g prot
Quest Diagnostics test directory, test code 19701