World's Largest Resource for Cardiovascular Perfusion

Perfusion NewswireBlood ManagementPlatelet Aggregation in Whole Blood is Not Impaired by A Platelet-Sparing Leukoreduction Filter and Instead Depends Upon the Presence of Leukocytes

Platelet Aggregation in Whole Blood is Not Impaired by A Platelet-Sparing Leukoreduction Filter and Instead Depends Upon the Presence of Leukocytes

Background

Recent studies characterizing in vitro hemostatic properties of whole blood (WB) leukoreduced (LR) with a platelet-sparing filter have described subtle, if any, changes to viscoelastic clotting; however, reductions in platelet (PLT) content and impedance aggregometry (IA) responses have been noted. The effects of filtration of WB (i.e., filter-contact effects, reduction in platelet and leukocyte count) have not been rigorously investigated as to their individual impacts on platelet IA responses.

Study Design and Methods

WB units from healthy donors were collected and characterized to assess the effects of platelet-sparing leukoreduction (LR) upon the in vitro hemostatic measures of platelet IA and thromboelastometry. Further characterization of platelet IA responses was carried out in WB samples to delineate the effects of platelet count and leukocyte presence/absence upon the response.

Results

WB filtration reduced the platelet count and IA responses but had no impact on viscoelastic clotting measures in fresh WB. Experiments revealed that IA responses have a linear correlation with platelet count in both apheresis platelets and WB and that passage of platelets through the WB-LR filter has no impact upon the strength of this response. Further experiments in LR WB showed that addition of autologous leukocytes back to the platelets fully restored the platelet aggregation response to pre-filtration levels.

Conclusion

WB filtration results in platelet count reduction and leukocyte removal; however, platelet IA is not degraded by passage through the filter. Apparent declines in platelet IA responses can be fully attributed to the reduction in platelet count and the removal of leukocytes.


Leave a Reply

#1 largest online community of Perfusionists

Join Our Perfusion.com
Online Community

Get your swag kit by becoming a member or updating profile.
Swag will be sent to U.S. mailing addresses only.
©2024 Perfusion. All Rights Reserved. Privacy Policy | Your Privacy Choices