Prevent Postpartum Hemorrhage in Women With Von Willebrand Disease: The VWD-WOMAN Trial

Summary

This is a single-center randomized phase III clinical trial, the VWD-Woman Trial, in which 20 pregnant subjects with von Willebrand disease (VWD), defined as VWF ristocetin co-factor activity (VWF:RCo) \<0.50 IU/ml (historic) and previous history of bleeding are enrolled. Subjects will include women with VWD age 18 years and older, excluding those who have a bleeding disorder other than VWD. Once enrolled, subjects who meet all of the inclusion and none of the exclusion criteria will be randomized to recombinant Von Willebrand factor (rVWF, Vonvendi ®) with Tranexamic Acid (TA, Cyclokapron®); or recombinant Von Willebrand factor (rVWF, Vonvendi®) alone to prevent postpartum hemorrhage after vaginal or caesarean delivery. The primary endpoint is quantitative blood loss (QBL) by a labor suite nurse at delivery. Secondary endpoints include safety assessment for postpartum lochial blood loss by Pictorial Blood Assessment Chart (PBAC), transfusion, blood products, thromboembolic events, and hysterectomy within 21 days; and mechanism of PPH reduction by VWF assays (VWF:RCo, VWF:Ag, VIII:C), fibrinogen, and d-dimer. Blood draws are at 5 time points, including at 36 weeks' gestation (screening), on admission for childbirth, and at 1 day, 2 days, and 21 days after delivery. The VWD-Woman Trial is considered greater than minimal risk as study drugs are given at delivery and special coagulation studies are obtained.

Timeline

Start

2021-06-04

Primary completion

2024-08-28

Completion

2024-09-01

Publications

• Background Ragni MV, Machin N, James AH, Seaman CD, Malec LM, Kessler CM, Konkle BA, Kouides PA, Neff AT, Philipp CS, Brooks MM. Feasibility of the Von Willebrand disease PREVENT trial. Thromb Res. 2017 Aug;156:8-13. doi: 10.1016/j.thromres.2017.05.022. Epub 2017 May 25.
• Background Ragni MV. Blood volume-based von Willebrand factor to prevent postpartum hemorrhage in von Willebrand disease. Blood Adv. 2017 Apr 25;1(11):703-706. doi: 10.1182/bloodadvances.2017005090. eCollection 2017 Apr 25.
• Background Ragni MV. Case-based discussion on the implications of exogenous estrogens in hemostasis and thrombosis: the hematologist's view. Hematology Am Soc Hematol Educ Program. 2019 Dec 6;2019(1):152-157. doi: 10.1182/hematology.2019000022.
• Machin NC, Brooks MM, Vehec D, Ivanco D, Lawryk B, Seaman CD, Xavier F, Shiva S, Verdoni A, Ragni MV. Impact of tranexamic acid on postpartum hemorrhage in type 1 von Willebrand disease treated with recombinant VWF. Blood Adv. 2025 Dec 9;9(23):6031-6039. doi: 10.1182/bloodadvances.2025017046.

Drugs

Indications