Sign in →

Test Code LAB7995 Disaccharidases

Additional Codes

CHOP Test ID  
Disaccharidases Analysis   

Performing Laboratory

St. Louis Children's Hospital Laboratory Sendouts to CHOP (Children's Hospital of Philadelphia)

Specimen Requirements

Speicmen Type: Duodenal Biopsy

Patient Preparation: None

Collection Container/Tube:

Preferred/acceptable: A clean, plastic screw-cap container with no preservative

 Submission Container/Tube: If specimen is coming from outside facility place in dry ice to freeze immediately and transport on dry ice to maintain frozen state.

Specimen Collection Volume: 5-10 mg tissue

Special Instructions: Place specimen in dry ice immediately after collection and deliver to lab on dry ice ASAP. Send a completed "Children's Hospital of Philadelphia Pathology and Laboratory Medicine" requistion with specimen.

Sample Rejection

Mislabeled or unlabeled specimens

Logistics

Test Availability: Monday-Friday

Days set-up: Varies; weekly

Turnaround Time: 1-2 weeks

Reference Values

Reference Interval: Interpretive report will be provided

Enzyme Normal Deficient
Lactase 14 - 33 nmol/min/mg protein < 14 nmol/min/mg protein
Sucrase 25 - 66 nmol/min/mg protein < 25 nmol/min/mg protein
Maltase 135 - 205 nmol/min/mg protein < 110 nmol/min/mg protein
Palatinase 8.5 - 22 nmol/min/mg protein < 8.5 nmol/min/mg protein

Critical Value: None established

Methodology

Enzymatic-spectrophotometric

Limitations

  • NA

Additional Information

FOR SLCH CORE LABORATORY USE ONLY

Lab Processing Instructions: KEEP SPECIMEN ON DRY ICE AT ALL TIMES. 

NOTE: specimen is only to be sent Mon-Wed. Any specimens recived Thursday or Friday should be placed in -80o freeze for shipment on Monday.

Processed Volume: 5-10 mg biopsy

Transport Temperature: Frozen

Analyte Stability:

Specimen Type    Temperature    Time    
Biopsy  Ambient NA
  Refrigerated     NA
  Frozen  NA (only acceptable)   

NOTE: specimen must be frozen immediately after collection in dry ice and kept frozen (-70o C) until received at reference lab. Specimen must be shipped frozen on dry ice by overnight express courier. Ship Monday-Wednesday ONLY. Specimens received on Thrusday or Friday should be held in -80o freeze until able to ship on Monday.

Test Classification and CPT Code

84311x4

LOINC

in process

Last Reviewed

08/2025