Ordering Recommendation

Evaluate carbohydrate malabsorption due to disaccharidase deficiency.

Mnemonic
DISACT
Methodology

Quantitative Spectrophotometry

Performed

Mon, Wed, Fri

Reported

1-6 days

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect

Biopsies of small bowel by endoscopy.

Specimen Preparation

Place two 5 mg biopsies of tissue on the wall of a small, tightly-capped plastic tube without any supporting media or an ARUP Standard Transport Tube and freeze within 2 hours of collection. (Min: 2 (two) 5 mg biopsies)

Storage/Transport Temperature

Frozen. Ship on dry ice.

Unacceptable Conditions

Specimens placed on gauze, filter paper, or any other type of support media. Tissue preserved in formalin.

Remarks
Stability

Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 6 months

Reference Interval
Component Reference Interval
Lactase Greater than or equal to 10.0 µmol/min/g protein
Maltase Greater than or equal to 100.0 µmol/min/g protein
Palatinase Greater than or equal to 9.0 µmol/min/g protein
Sucrase Greater than or equal to 25.0 µmol/min/g protein

Interpretive Data



Compliance Statement B: For laboratory developed tests not using a RUO kit, and for FDA approved, cleared or 510(k) exempt assays with alterations. This test was developed and its performance characteristics determined by ARUP Laboratories. The U. S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.

Note
Hotline History
N/A
CPT Codes

82657

Components
Component Test Code* Component Chart Name LOINC
2002249 Sucrase 14178-8
2002251 Lactase 1942-2
2002253 Palatinase 14168-9
2002255 Maltase 29640-0
2002487 Disaccharidase Interpretation 57779-1
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Isomaltase
  • Lactase
  • Maltase
  • Palatinase
  • Sucrase
Disaccharidase in Tissue