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Type and Screen

Type/Screen

Test Codes

EPIC: LAB276, Beaker: Type&Screen

Department

Blood Bank

Instructions

Specimens used for transfusion purposes must be drawn within 3 days of intended transfusion. Day of collection is Day 0. Tubes drawn for cryoprecipitate, fresh frozen plasma (FFP), or platelet transfusions may be more than 3 days old, but must be obtained during the current admission/visit.

Specimen Collection Criteria

Collect: One Pink-top EDTA tube, properly labeled. (Minimum Volume: 2.0 mL)
Also acceptable: (For Nursery Patients) One Pink-top EDTA Microtainer®, properly labeled. (Minimum Volume: 0.5 mL) Blood Bank may call for additional specimen if further testing is required.

It is extremely important that blood samples are accurately labeled. Inpatient labels must include the following information:

1. Patient's Name: Complete name. If the patient uses a first initial followed by a middle name, both must appear in proper order on the label.
2. Wrist Band Number:  Include the prefix letters, 4 numbers, and a suffix letter (example: BR1234T). Specimens lacking this complete information cannot be used for blood transfusion purposes and requires recollection.
3. Hospital Identification Number: The seven-digit medical record number must be included on the label.
4. Date and Time Collected
5. Identification of Collector: Employee ID number or first initial and complete last name must be on the sample tube or documented in the computer system.

For Beaumont Reference Laboratory (Outreach) patients, please refer to the Laboratory Bulletin on Laboratory Specimens: How to Label Correctly. 

Physician Office/Draw Specimen Preparation

Maintain specimen at room temperature (20-26°C or 68-78.8°F) or refrigerated (2-8°C or 36-46°F) prior to transport.

Preparation for Courier Transport

Transport: Whole blood at room temperature (20-25°C or 68-77°F) or refrigerated (2-8°C or 36-46°F).

Rejection Criteria

• Improperly labeled specimens.
• Specimens with inadequate volume.
• Specimens collected in inappropriate collection tubes.
• Specimens contaminated with IV fluids.
• Grossly hemolyzed samples will be tested only in emergency situations.

In-Lab Processing

Centrifuge the specimen upon receipt in the Laboratory.

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 24 hours
Refrigerated (2-8°C or 36-46°F): 72 hours
Frozen (-20°C/-4°F or below): Unacceptable

Specimen Storage in Department Prior to Disposal:

Refrigerated (2-8°C or 36-46°F): Specimens are held for a minimum of 7 days.

*Once a sample arrives in Blood Bank, it cannot be shared with other laboratories.

Laboratory

Dearborn Transfusion Medicine Laboratory (Blood Bank)
Farmington Hills Transfusion Medicine Laboratory (Blood Bank)
Grosse Pointe Transfusion Medicine Laboratory (Blood Bank)
Royal Oak Transfusion Medicine Laboratory (Blood Bank)
Taylor Transfusion Medicine Laboratory (Blood Bank)
Trenton Transfusion Medicine Laboratory (Blood Bank)
Troy Transfusion Medicine Laboratory (Blood Bank)
Wayne Transfusion Medicine Laboratory (Blood Bank)

Performed

Sunday – Saturday, 24 hours a day.
Results available on patients without unexpected antibodies within 2 hours of receipt in the Blood Bank for STAT inpatients requests, 4 hours for routine inpatient requests and as close to 8 hours after receipt in the Blood Bank for outpatient specimens.

Test Methodology

Hemagglutination

Interpretation

ABO/Rh Type: By report.
Antibody Screen:

• Negative – No antibody detected.
• Positive – Antibody detected. Follow-up antibody identification will be performed as indicated per policy. The antibodies should be identified in order to determine their potential for harm to the patient and to assess appropriate action to be taken in the future. Antibody identification is performed and billed at a separate additional charge if indicated.
• False negative test results may occur if the serum being tested contains an antibody directed toward an antigen not represented on the reagent red blood cells being used for testing. False negative results may also be obtained if the antibody titer falls below detectable levels.

Note: Nursery antibody screen results are for transfusion purposes and may reflect either mother's or baby's antibody screen.

Clinical Utility

Proper ABO and Rh typing and detection of irregular antibodies are required to provide compatible blood for transfusion. This testing also provides historical data useful in assuring accuracy of subsequent specimens and testing and assessing special blood requirements for a future date.

CPT Codes

86900 (ABO), 86901 (Rh), 86850 (Antibody Screen).

Contacts

Last Updated

9/9/2024