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Psbc.org

Role of prothrombin complex concentrates in
reversing warfarin anticoagulation


Over the past year, several King County Hospitals have asked for our opinion on
using prothrombin complex concentrates (PCCs) to reverse warfarin
anticoagulation in patients with intracranial hemorrhage (ICH) and other life
threatening bleeding episodes. The annual incidence of fatal bleeding in patients
on warfarin is approximately 1%, with ICH accounting for the majority of cases.
Warfarin interferes with production of the vitamin K dependent coagulation
factors II, VII, IX, and X. Because reversal of warfarin anticoagulation by
infusion of vitamin K can take more than 1-2 days, the standard of care has been
to transfuse plasma into patients needing more rapid normalization of factor
levels. PCCs also contain vitamin K dependent factors and are an alternative
product that can be used to reverse warfarin anticoagulation. In most parts of the
world there are PCC preparations that contain all 4 vitamin k dependent factors.
The preparations available in the US lack factor VII requiring that 2 units of
plasma be given in addition to the PCC. The main advantage of PCCs is that
their small volume allows them to be infused quickly. Data generated with both
3-factor and 4-factor PCCs demonstrates rapid reversal of anticoagulation, based
on in vitro coagulation assays. However, there are only a few underpowered
randomized studies that looked at clinical outcomes so it is not possible to know
if the more rapid reversal times associated with PCCs translate into better
meaningful recoveries for patients. 1
The small volume of fluid administered to patients receiving PCCs also has the
potential to reduce the risk of circulatory overload associated with the rapid
infusion of large volumes of plasma that are needed to reduce warfarin
anticoagulation. Furthermore, PCC usage should minimize the incidence of
other transfusion-associated adverse events. These products undergo virucidal
treatment and theoretically should have almost no risk of inducing TRALI. The
considerations against using PCCs are the potential thrombotic risk and the
expense. With the current preparations of PCCs, thrombotic risk appears to be
lower compared to older preparations. In a review article published in 2007,
there were 7 thrombotic complications in 460 PCC treated patients, for an
incidence of 1.5%.2 The rate of thrombotic complications with the use of plasma
has not been well established. As to cost in an off-label situation such as ICH, a
921 Terry Avenue | Seattle, WA | 98104-1256 | 206-292-6500 | fax 206-292-8030 | psbc.org low dose (25U/kg) of PCC in a 70kg patient would cost approximately $1645.00, and a higher dose (40U/kg) would cost approximately $2632.00. If you would like further consultation on developing a protocol for reversal of ICH in patients on Coumadin, feel free to contact uor theresan@psbc.org). If you choose to develop a protocol using PCCs, please be aware that the Blood Center does keep this concentrate in inventory. We also offer a return policy: as long as the product is kept at appropriate storage conditions and the boxes are intact and unmarked, any factor concentrate purchased from PSBC may be returned for credit with 4 months or more remaining prior to expiration. For more information, please contact the hemophilia department at 206-292-6507. References: 1. Boulis NM, Bobek MP, Schmaier A, Hoff JT. Use of factor IX concentrate in warfarin-related ICH. Neurosurgery 1999; 45(5):1113-1118. 2. Leissinger CA et al. role of prothrombin complex concentrates in reversing warfarin anticoagulation: A review of the literature. Am J Hematol 2008;83:137-143. 3. Bershad EM and Suarez JI. Prothrombin Complex Concentrates for Oral Anticoagulant Therapy-Related ICH: A Review of the Literature. Neurocrit Care 2010;12:403-413.
Neil Josephson, MD and Theresa Nester, MD
Puget Sound Blood Center
Published October 2012

921 Terry Avenue | Seattle, WA | 98104-1256 | 206-292-6500 | fax 206-292-8030 | psbc.org

Source: https://www.psbc.org/news/pdf/2012_October_pp_Prothrombin.pdf

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