title: Labor and delivery in a patient with hemophilia B.
abstract: Hemophilia B is a rare X-linked disorder that may cause dramatic bleeding. Women account for only 3.2% of those clinically affected. The X-linked inheritance frequently delays the diagnosis in women and may expose the patient to an increased risk of adverse events. There is limited experience with these patients during labor and delivery. A 28-year-old primiparous woman with hemophilia B (bleeding phenotype) delivered a male infant by an unplanned cesarean delivery under general anesthesia following treatment with factor IX and normalization of her coagulation parameters, guided by thromboelastography. Postpartum vaginal bleeding required transfusion of two units of packed red blood cells. Factor IX supplementation continued for one week. Once diagnosed with hemophilia B, a multidisciplinary approach and advanced antenatal planning can increase the likelihood of a safe delivery. Neuraxial approaches and cesarean delivery are recommended only after normalization of the coagulation profile. The male fetus of a hemophilia A or B patient requires special attention. Operative vaginal delivery and invasive fetal monitoring should be avoided. Thromboelastography is an excellent technique to assess parturients with bleeding disorders or peripartum hemorrhage and may be underused.
authors.affiliation: Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
authors.forename: R
authors.initials: R
authors.lastname: Przkora
authors.forename: T Y
authors.initials: TY
authors.lastname: Euliano
authors.forename: K
authors.initials: K
authors.lastname: Roussos-Ross
authors.forename: M
authors.initials: M
authors.lastname: Zumberg
authors.forename: S A
authors.initials: SA
authors.lastname: Robicsek
mesh_terms: D000328:Adult; D000768:Anesthesia, General; D000773:Anesthesia, Obstetrical; D016063:Blood Loss, Surgical; D002585:Cesarean Section; D036861:Delivery, Obstetric / Q000379:methods*; D017707:Erythrocyte Transfusion; D005164:Factor IX / Q000627:therapeutic use; D005260:Female; D002836:Hemophilia B / Q000150:complications* / Q000188:drug therapy; D006801:Humans; D007743:Labor, Obstetric / Q000502:physiology*; D008297:Male; D006473:Postpartum Hemorrhage / Q000517:prevention & control; D011247:Pregnancy; D013916:Thrombelastography
chemical_list: D005164:Factor IX