A retrospective 11-year analysis of obstetric patients with idiopathic thrombocytopenic purpura

Author:

Webert Kathryn E.1,Mittal Richa1,Sigouin Christopher1,Heddle Nancy M.1,Kelton John G.1

Affiliation:

1. From the Department of Medicine, McMaster University, Hamilton, Ontario, ON, Canada.

Abstract

AbstractNumerous studies have examined the outcomes of infants born to mothers with idiopathic thrombocytopenic purpura (ITP). Fewer studies have discussed the morbidity of obstetric patients with ITP. We describe a retrospective study of 92 women with ITP during 119 pregnancies over an 11-year period. Most women had thrombocytopenia during pregnancy. At delivery, women in 98 pregnancies (89%) had platelet counts lower than 150 × 109/L; most had mild to moderate thrombocytopenia. For many, the pregnancy was uneventful; however, women had moderate to severe bleeding in 25 pregnancies (21.5%). Women in 37 pregnancies (31.1%) required treatment to increase platelet counts. During delivery, 44 women (37.3%) received epidural analgesia without complications, with most having a platelet count between 50 and 149 × 109/L. Most deliveries (82.4%) were vaginal. Bleeding was uncommon at delivery. Infant platelet counts at birth ranged from 12 to 436 × 109/L; 25.2% of infants had platelet counts lower than 150 × 109/L, and 9% had platelet counts lower than 50 × 109/L. Eighteen infants (14.6%) required treatment for hemostatic impairment. Two fetal deaths occurred. One was caused by hemorrhage. ITP in pregnancy carries a low risk, but mothers and infants may require therapy to raise their platelet counts. (Blood. 2003;102:4306-4311)

Publisher

American Society of Hematology

Subject

Cell Biology,Hematology,Immunology,Biochemistry

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