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Test Code OBPAK,OBB Obstetrics (OB) Package

Performing Laboratory

Bronson Laboratory Services

Reference Values

See individual test listings.


Profile Information:
ABO and Rh Type Hepatitis B Surface Antigen (HBsAg)
Antibody Screen Treponemal Antibodies (Syphilis)
Complete Blood Count (CBC) with Differential Rubella Screening









Specimen Requirements

Serum and whole blood are required.


HBsAg, Treponemal Antibodies (Syphilis), and Rubella Screening
Specimen Type: Serum
Container/Tube: Gold top serum gel-Plain, red-top tube is also acceptable.
Specimen Volume: 5 mL

Specimen Minimum Volume: 3 mL


Blood for ABO and Rh Type, Antibody Screen, and CBC with Differential

Specimen Type: Whole blood
Container/Tube: Lavender top (EDTA)-Lavender-top (EDTA) MICROTAINER is also acceptable.

Specimen Volume: Full tubes-one 6-mL tube for Blood Bank and one 5-mL tube for Hematology

Specimen Minimum Volume: 3 mL for Blood Bank and 0.4 mL in MICROTAINER for Hematology

Collection Instructions:

1. Invert gently several times to mix blood.

2. Causes for rejection include incorrectly or incompletely labeled specimen or clotted or hemolyzed specimen.

Specimen Transport Temperature


Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding