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Beta-Hexosaminidase, Serum

Test ID: HEXO

Test

Method

Enzymatic Fluorimetric

Report Includes

β-Hexosaminidase Total; Hexosaminidase-B; % Hexosaminidase-B

Specimens

Serum

Test Location

Hospital for Sick Children, 555 University Avenue, Toronto ON M5G 1X8

Test Version

3-Jan-2023

Specimen

Specimens

Serum

Collection Containers

Red Top (no additive)

Sample Volume

2 mL

Minimum Volume

0.4 mL

Specimen Comment

Plasma is not acceptable

Collection & Handling

Handling Information

Separate and freeze immediately. Store and send frozen.

Additional Information

Indicate patient’s age, gender and race. For female patient indicate if pregnant or on oral contraceptives. Ontario patients Tay-Sachs Carrier Detection: Please submit completed Tay-Sachs Requistion.

Stability

Ambient Unacceptable
Refrigerated Unacceptable
Frozen 180 days

Additional Stability Information

If the specimen thaws, it is unsuitable for analysis.

Rejection Criteria

Specimen Not frozen or Plasma

Test Version

3-Jan-2023

Performance / Interpretation

Method

Enzymatic Fluorimetric

Turnaround Time

12 days

Results

Name Units Reference Range Conversion Factor
β-Hexosaminidase nmol/h/mL
  • 439 - 1300
Hexosaminidase-B nmol/h/mL
  • See % Hexosaminidase-B
% Hexosaminidase-B % of Total
  • 30 - 45
  • Interpreted on Report

Test Location

Hospital for Sick Children, 555 University Avenue, Toronto ON M5G 1X8

Test Version

3-Jan-2023

Interface / Setup

HL7 Interface Codes

Order Code Result Codes Units
HEXO 22882% HEX-B %
22881Hex-B nmol/h/mL
22880Total Hex nmol/h/mL
65261BETA-HEXOSAMINIDASE COMMENT

Test Version

3-Jan-2023