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Test Code GXM Type and Screen (GXM) 

Important Note

For NUH patients: To be ordered by clinician or certified APNs. Sample must be taken by GXM certified nurse or phlebotomist if not taken by a doctor. Strictly for clinical use only.

For external clients (NRL):  To consider ABORH instead. Otherwise to discuss with BTS supervisor prior to accepting orders.

Specimen Requirements

Specimen Type: Whole Blood

Container/Tube: EDTA Pink Top
Volume: 6.0 mL

Specimen Stability

Specimen Type Whole Blood
Ambient Freshly drawn samples (preferred)
Refrigerate  3 days
Frozen  Not Applicable

 

Group and Crossmatch (Pre-Admission Testing) samples are valid for 3 days after the day of operation. Please ensure that operation falls within 45 days from the date of collection.

Specimen Condition

Gross Haemloysis Reject
Icterus OK
Lipaemia OK
Others Insufficient specimen - Reject
Others Refer to Blood Transfusion Services Collection Guidelines for GXM rejection criteria

 

Methodology

Immune Agglutination

Days and Times Performed

Monday through Sunday

Routine, TAT 2hours to 3days

STAT, TAT 1hour

 

Exact TAT may vary depending on situation such as ABO discrepancies, antibodies detected.

Testing Laboratory

National University Hospital
Transfusion Services, 67722305

Useful For

ABORh typing and antibody screening to screen and detect red cell antibody/ies. This sample allows crossmatching of red cell units for transfusion

Service Code

2012711

Update

Last updated 16/06/2025

Reflex Testing

Direct Antiglobulin (Coomb’s) Test
Antibody Titre, Others
Red Cell Phenotyping

Alias

Group and Crossmatch (GXM)

Type and Screen

T&S

Laboratory Code

LAB276

LOINC Code Information

ABORh: LAB895

ABS: LAB276