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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: 6.0mL

Days and Times Performed

24 hours

 

TAT Remarks
2 hours to 3 days (Routine)

Exact time may vary depending on situation

For example; ABO discrepancies,

Antibodies detected
1 hour (STAT)

 

Methodology

Immune Agglutination

Service Code

2012711

Update

Last updated 03/04/2023

Unacceptable Condition

For Group and Crossmatch samples, to refer to Blood Transfusion Services Collection Guidelines for GXM rejection criteria

Specimen Stability

Test best performed on fresh drawn samples.

Group and Crossmatch samples are valid for 3 days after collection.

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.

Testing Laboratory

National University Hospital
Transfusion Services, 67722305

Useful For

Blood Group and Antibody Screen. Blood Group : ABO and Rh(D) Blood Group Antibody Screen : Detect clinically significant alloantibodies

Reflex Testing

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

Antibody Identification (Red Cells)

Alias

Type and Screen
Group and Crossmatch (GXM)

Additional Info

Exact TAT may vary depending on situation such as ABO Discrepancy or positive antibody screening