ABO and Rh(D) Blood Group

Determines the ABO blood group and Rh(D) status; important for transfusions and pregnancy care.

For planning a blood transfusion, monitoring pregnancy and immunohematology evaluation.

1. Check in advance whether you need to fast or have your blood drawn at a specific time.
2. Fasting is not required. If the test is done before a transfusion, additional identification and sample collection rules may apply.
3. Before the blood draw, avoid unusually intense physical exercise unless your doctor has advised otherwise.
4. Tell your doctor and the laboratory staff about any medicines and dietary supplements you take.

Fasting is generally not required. If another test has been ordered at the same time, the overall preparation plan may change.

A specific time is generally not required. If your doctor has set a different time, follow those instructions.

• Incorrect collection or contamination of the sample
• Delayed delivery of the sample
• Certain medicines and coexisting conditions

Blood — depending on the immunohematology method

The blood sample is collected by a specialist. Correct patient identification and tube labeling are especially important; additional compatibility testing may be needed before a transfusion.

ABO and Rh(D) are qualitative results; “high” or “low” do not apply to them. Additional compatibility testing is required before a transfusion.

If your result is outside the reference interval, you have symptoms, or your condition changes, contact your doctor. If symptoms are severe or develop quickly, seek emergency care.

Do not stop treatment on your own. Confirm the final test conditions with the laboratory.