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Test Code PCS2 Pre-Conception Screen

Specimen Requirements

ABO Group and Rh Type (ABORh)

Preferred

Specimen Type Whole Blood
Container/Tube EDTA Lavendar Top
Volume 3.0mL
Minimum Volume 3.0mL Whole Blood

Acceptable

Specimen Type Whole Blood
Container/Tube EDTA Pink Top
Volume 6.0mL
Minimum Volume 6.0mL Whole Blood

HBsAg, Anti-HBs, Anti-HCV, Syphilis Ab, Anti-HIV Ag-Ab, RUBG, VZG

Specimen Type Serum
Container/Tube Gold Top (SSTII) / Red Top
Volume 5.0mL / 6.0mL blood
Minimum Volume 1.0 mL serum
Collection Instructions Allow specimen to clot for 30 minutes and centrifuge within 2 hours

Thalassaemia Screen (THALS)

See Thalassaemia Screen for specimen requirements

Profile Information

  • Full Blood Count
  • Hb H Inclusion Bodies
  • Haemoglobin Electrophoresis
  • Haemoglobin A2 and F

Sample Stability

** Preferred temperatures for storage prior to and during shipping to NUH **

ABO Group and Rh Type (ABORh)

Samples are kept for 14 days. Test best performed on fresh drawn samples

 

HBsAg, Anti-HBs, Anti-HCV,  Syphilis Ab, Anti-HIV Ag-Ab, RUBG, VZG

Specimen type Serum
Ambient 8 hours
Refrigerate 6 days
Frozen 8 months (avoid repeated freeze/thaw cycles) 

Thalassaemia Screen (THALS)

Specimen type Whole Blood
Ambient 8 hours
Refrigerate 1 day
Frozen NA

Reference Interval

See individual test listings for reference values (Related Tests field below)

Days and Times Performed

ABO Group and Rh Type (ABORh) 24 hours, TAT 1 day
HBsAg, Anti-HBs, Anti-HCV, Syphilis Ab, Anti-HIV Ag-Ab, RUBG Monday through Friday, TAT 1-3 days
Varicella Zoster IgG (VZG) Tuesday, Friday, TAT 2-5 days
Thalassaemia Screen (THALS) Monday through Friday, Office hours, TAT 5 – 21 working days (for identification of abnormal variants)

Methodology

See individual test listings for Methodology

Service Code

0034021

Update

Last updated 26/02/2022

Unacceptable Condition

ABO Group and Rh Type (ABORh)

Haemolysis Gross Invalidate Result
Icterus NA
Lipaemia NA
Others Insufficient sample will be rejected

 

HBsAg, Anti-HBs, Anti-HCV, Syphilis Ab, Anti-HIV Ag-Ab, RUBG, VZG

Haemolysis Mild OK; Gross reject
Icterus Mild OK; Gross OK
Lipaemia  Mild OK; Gross OK
Others NA

 

Useful For

ABO Group and Rh Type (ABORh) Determine ABO and Rh (D) blood group
Thalassaemia Screen (THALS) Investigation of thalassaemia and other haemoglobinopathies
HBsAg, Anti-HBs, Anti-HCV, Syphilis Ab, Anti-HIV Ag-Ab, RUBG, VZG Blood tests to evaluate and prepare for a healthy pregnancy.

Related Tests