Detection of large fetal--maternal transfusions

Area of Science:

• Obstetrics and Gynecology
• Immunology
• Hematology

Background:

• Rh sensitization is a significant risk for Rh-negative women carrying Rh-positive fetuses.
• Early detection of fetal maternal hemorrhage is crucial for timely intervention.

Purpose of the Study:

• To compare the efficacy of the Nierhaus modification of the Betke-Kleihauer method and the Fetaldex test in detecting large fetal-maternal transfusions.
• To evaluate the suitability of the Fetaldex test for routine postpartum screening.

Main Methods:

• Two hundred consecutive Rh-negative women were screened postpartum.
• Fetal-maternal transfusion was assessed using the Betke-Kleihauer method and the Fetaldex test.
• Correlation between the two techniques was analyzed.

Main Results:

• Both methods detected no significant fetal-maternal transfusion in 194 out of 200 women.
• A large fetal-maternal hemorrhage was identified in 6 women by the Betke-Kleihauer method, and in 5 of these by the Fetaldex test.
• An overall correlation of 99.5% was observed between the two techniques.

Conclusions:

• The Fetaldex test is a reliable and accurate method for detecting fetal cells postpartum.
• The Fetaldex test offers advantages over the Betke-Kleihauer method and is well-suited for routine clinical use.
• This screening method aids in preventing Rh sensitization and managing potential complications.