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https://www.readbyqxmd.com/read/28815621/red-blood-cell-sedimentation-of-apheresis-granulocytes
#1
Michelle A Lodermeier, Karen M Byrne, Willy A Flegel
Sedimentation of Apheresis Granulocyte components removes red blood cells. It is used to increase the blood donor pool when blood group-compatible donors cannot be recruited for a patient because of a major ABO incompatibility or incompatible red blood cell antibodies in the recipient. Because granulocytes have little ABO and few other red blood cell antigens on their membrane, such incompatibility lies mostly with the contaminating red blood cells. Video Clip S1 shows the process of red blood cell sedimentation of an Apheresis Granulocyte component...
August 16, 2017: Transfusion
https://www.readbyqxmd.com/read/28815620/one-and-two-sample-t-tests
#2
Aaron S Hess, John R Hess
No abstract text is available yet for this article.
August 16, 2017: Transfusion
https://www.readbyqxmd.com/read/28815618/effect-on-gene-expression-of-three-allelic-variants-in-gata-motifs-of-abo-rhd-and-rhce-regulatory-elements
#3
Katie Fennell, Roser Hoffman, Ken Yoshida, Sadahiko Iwamoto, Lavendri Govender, Kuben Vather, Ashika Sookraj, Ute Jentsch, Chantale Pambrun, Catherine McAuley, Margaret A Keller, Gorka Ochoa-Garay
BACKGROUND: Only a few genetic variants have been reported in regulatory elements of blood group genes. Most of them affect GATA motifs, binding sites for the GATA-1 transcription factor. STUDY DESIGN AND METHODS: Samples from two patients and one donor with unusual or discrepant serology for ABO, RhD, and RhCE antigens were analyzed by DNA sequencing. Analyzed regions included the coding sequence and portions of regulatory elements. The effect of some variants on gene expression was evaluated in reporter gene assays...
August 16, 2017: Transfusion
https://www.readbyqxmd.com/read/28782257/how-to-perform-extracorporeal-photopheresis-via-port-catheter
#4
Katharina Schwede, Stephanie Nagel, Jan-Christoph Simon, Mirjana Ziemer
BACKGROUND: Extracorporeal photopheresis (ECP) is commonly performed via peripheral venous access catheter. If this is not possible, a tunneled central venous catheter may be considered. However, this access mode may be associated with high complication rates. Port catheters and permanent arteriovenous fistulas in principle could serve as alternative options; however, treatment opinions are limited. STUDY DESIGN AND METHODS: We report on four adult patients with poor peripheral vein conditions in whom we performed ECP via port catheter...
August 7, 2017: Transfusion
https://www.readbyqxmd.com/read/28782250/meropenem-induced-immune-thrombocytopenia-and-the-diagnostic-process-of-laboratory-testing
#5
Rong Huang, Guang-Qing Cai, Jun-Hua Zhang, Feng-Xia Liu, Jin-Qi Ma, Hong Liu, Xin-Min Nie, Rong Gui
BACKGROUND: Drug-induced immune thrombocytopenia (DITP) is a serious, life-threatening clinical syndrome, the diagnosis of which is consistently difficult. In this report, we present a case of DITP caused by meropenem that was confirmed by laboratory tests. CASE REPORT: A 59-year-old male patient developed severe thrombocytopenia 8 days after the administration of meropenem and cefoperazone-sulbactam. After other causes were ruled out, DITP was suspected. Drug-induced platelet (PLT) antibodies were detected by enzyme immunoassay, flow cytometry, and monoclonal antibody immobilization of PLT antigens (MAIPA)...
August 7, 2017: Transfusion
https://www.readbyqxmd.com/read/28782124/supernatant-reduction-of-stored-gamma-irradiated-red-blood-cells-minimizes-potentially-harmful-substances-present-in-transfusion-aliquots-for-neonates
#6
Katherine Serrano, Chantale Pambrun, Elena Levin, Dana V Devine
BACKGROUND: In neonate transfusion, the use of a dedicated red blood cell (RBC) unit decreases donor exposure. A separate safety measure involves gamma irradiation of the RBCs to abrogate the possibility of transfusion-associated graft-versus-host disease. However, in combination, storage of gamma-irradiated RBCs leads to accumulation of potentially harmful substances in the supernatant. STUDY DESIGN AND METHODS: For this study, RBCs were pooled and split into three study arms...
August 7, 2017: Transfusion
https://www.readbyqxmd.com/read/28782123/the-effects-of-storage-of-red-blood-cells-on-the-development-of-postoperative-infections-after-noncardiac-surgery
#7
Savino Spadaro, Fabio Silvio Taccone, Alberto Fogagnolo, Vito Fontana, Riccardo Ragazzi, Marco Verri, Giorgia Valpiani, Pantaleo Greco, Margherita Bianconi, Maurizio Govoni, Roberto Reverberi, Carlo Alberto Volta
BACKGROUND: Prolonged storage of red blood cells (RBCs) is a potential risk factor for postoperative infections. The objective of this study was to examine the effect of age of RBCs transfused on development of postoperative infection. STUDY DESIGN AND METHODS: In this prospective, double-blind randomized trial, 199 patients undergoing elective noncardiac surgery and requiring RBC transfusion were assigned to receive nonleukoreduced RBCs stored for not more than 14 days ("fresh blood" group, n = 101) or for more than 14 days ("old blood" group, n = 98)...
August 7, 2017: Transfusion
https://www.readbyqxmd.com/read/28782120/cases-of-transfusion-transmitted-babesiosis-occurring-in-nonendemic-areas-a-diagnostic-dilemma
#8
David P LeBel, Erin D Moritz, Jennifer J O'Brien, John Lazarchick, Lee Marie Tormos, Angie Duong, Magali J Fontaine, Jerry E Squires, Susan L Stramer
BACKGROUND: Transfusion-transmitted babesiosis (TTB) has been rapidly increasing in incidence since the beginning of the 21st century. Asymptomatic individuals with Babesia infection are able to donate blood in the United States because of the lack of specific blood donation testing. Blood products collected in Babesia-endemic areas are distributed nationally; thus, clinicians in nonendemic states may fail to include babesiosis in the differential diagnosis of a patient who had a recent transfusion history and a fever of unknown origin...
August 7, 2017: Transfusion
https://www.readbyqxmd.com/read/28782117/risk-factors-for-blood-transfusion-in-patients-undergoing-high-order-cesarean-delivery
#9
Jessica Spiegelman, Mirella Mourad, Stephanie Melka, Simi Gupta, Jennifer Lam-Rachlin, Andrei Rebarber, Daniel H Saltzman, Nathan S Fox
BACKGROUND: The objective was to identify risk factors associated with blood transfusion in patients undergoing high-order Cesarean delivery (CD). STUDY DESIGN AND METHODS: This was a retrospective cohort study of patients undergoing third or more CD by a single maternal-fetal medicine practice between 2005 and 2016. We compared risk factors between women who did and did not receive a red blood cell transfusion during the operation or before discharge. Repeat analysis was performed after excluding women with placenta previa...
August 7, 2017: Transfusion
https://www.readbyqxmd.com/read/28766731/microparticles-from-stored-red-blood-cells-enhance-procoagulant-and-proinflammatory-activity
#10
Dania Fischer, Julian Büssow, Patrick Meybohm, Christian Friedrich Weber, Kai Zacharowski, Anja Urbschat, Markus Matthias Müller, Carla Jennewein
BACKGROUND: The pathomechanisms of morbidity due to blood transfusions are not yet entirely understood. Elevated levels of red blood cell-derived microparticles (RMPs) are found in coagulation-related pathologies and also in stored blood. Previous research has shown that RMPs mediate transfusion-related complications by the intrinsic pathway. We hypothesized that RMPs might play a role in post-transfusion thrombotic complications by enhancing procoagulant activity also through the extrinsic pathway of coagulation...
August 2, 2017: Transfusion
https://www.readbyqxmd.com/read/28766723/comparing-transfusion-reaction-rates-for-various-plasma-types-a-systematic-review-and-meta-analysis-regression
#11
Nicholas H Saadah, Fabienne M A van Hout, Martin R Schipperus, Saskia le Cessie, Rutger A Middelburg, Johanna C Wiersum-Osselton, Johanna G van der Bom
BACKGROUND: We estimated rates for common plasma-associated transfusion reactions and compared reported rates for various plasma types. STUDY DESIGN AND METHODS: We performed a systematic review and meta-analysis of peer-reviewed articles that reported plasma transfusion reaction rates. Random-effects pooled rates were calculated and compared between plasma types. Meta-regression was used to compare various plasma types with regard to their reported plasma transfusion reaction rates...
August 2, 2017: Transfusion
https://www.readbyqxmd.com/read/28758222/mitigation-of-the-threat-posed-to-transfusion-by-donors-traveling-to-zika-affected-areas-a-canadian-risk-based-approach
#12
Marc Germain, Gilles Delage, Sheila F O'Brien, Yves Grégoire, Margaret Fearon, Dana Devine
BACKGROUND: The recent spread of the Zika virus to the Americas and the recognition that it can cause severe disease in the developing fetus has prompted the adoption of measures to mitigate the risk that this virus might pose to transfusion safety. In nonendemic countries, the risk to transfusion results from donors traveling to an endemic region. Canada implemented a 21-day temporary deferral for prospective donors who traveled to such regions. We present the rationale for this policy, including a quantitative risk assessment supported by a Monte Carlo simulation...
July 31, 2017: Transfusion
https://www.readbyqxmd.com/read/28758211/cytomegalovirus-viral-load-in-cord-blood-and-impact-of-congenital-infection-on-markers-of-hematopoietic-progenitor-cell-potency
#13
M Susana Albano, Rodica Ciubotariu, Ludy Dobrila, Michal Tarnawski, Margely DeLeon, Chiseko Watanabe, Siddarth Krishnan, Andromachi Scaradavou, Pablo Rubinstein
BACKGROUND: The low incidence of cytomegalovirus (CMV) infection in neonates decreases the risk of viral transmission with cord blood transplantation. Cord blood donors are screened by testing the maternal sample for total antibodies to CMV. Some cord blood banks also screen cord blood for CMV-DNA. The aim of this study was to develop and validate a multiplex real-time polymerase chain reaction assay to measure CMV viral load in cord blood from asymptomatic infants with congenital CMV infection and to assess the impact of CMV infection on cord blood hematopoietic progenitor cell concentrations and colony-forming unit functionality...
July 31, 2017: Transfusion
https://www.readbyqxmd.com/read/28734023/how-do-we-manage-blood-donors-and-recipients-after-a-positive-zika-screening-result
#14
Alexandra Jimenez, Beth H Shaz, Debra Kessler, Evan M Bloch
Zika virus (ZIKV) is a mosquito-borne flavivirus that is the focus of an ongoing pandemic. ZIKV is notable for its severe neurologic sequelae in babies born to infected mothers. High rates of subclinical infection, as evidenced by the finding of ZIKV RNA in asymptomatic donors, raise concerns of risk to the blood supply. To date, a total of four suspected cases of transfusion-transmitted ZIKV have been reported (all in Brazil), none of which were associated with clinical infection in the transfusion recipients...
July 21, 2017: Transfusion
https://www.readbyqxmd.com/read/28734018/influence-of-cryoprecipitate-factor-xiii-and-fibrinogen-concentrate-on-hyperfibrinolysis
#15
Melissa M Cushing, Meghann M Fitzgerald, Rebecca M Harris, Lars M Asmis, Thorsten Haas
BACKGROUND: Hyperfibrinolysis is a potentially life-threatening condition associated with poor clot integrity and excessive bleeding. Although antifibrinolytics are an effective treatment, more liberal use of these drugs may lead to a prothrombotic risk, and an earlier and potentially safer treatment option would be desirable. Hyperfibrinolysis has been shown to be attenuated by in vitro supplementation of purified human Factor (F)XIII concentrate. Cryoprecipitate represents an alternative source of FXIII and the only approved source of concentrated FXIII in some countries...
July 21, 2017: Transfusion
https://www.readbyqxmd.com/read/28727139/effect-of-solvent-detergent-treated-pooled-plasma-on-fibrinolysis-in-reconstituted-whole-blood
#16
Nicholas H Saadah, Pieter F van der Meer, Herm Jan M Brinkman, Dirk de Korte, Ido J Bontekoe, Herbert H Korsten, Rutger A Middelburg, Johanna G van der Bom, Martin R Schipperus
BACKGROUND: Hyperfibrinolysis has been observed in patients heavily transfused with solvent/detergent-treated pooled plasma (S/D plasma). We compared coagulation and fibrinolytic variables in blood containing S/D plasma with blood containing fresh-frozen plasma (FFP), with and without α2-antiplasmin or tranexamic acid (TXA) supplementation. STUDY DESIGN AND METHODS: Whole blood samples were reconstituted from red blood cells, platelet (PLT) concentrates, and varying mixtures of FFP and S/D plasma...
July 20, 2017: Transfusion
https://www.readbyqxmd.com/read/28718518/reduction-of-zika-virus-infectivity-in-platelet-concentrates-after-treatment-with-ultraviolet-c-light-and-in-plasma-after-treatment-with-methylene-blue-and-visible-light
#17
Jesse J Fryk, Denese C Marks, Jody Hobson-Peters, Daniel Watterson, Roy A Hall, Paul R Young, Stefan Reichenberg, Frank Tolksdorf, Chryslain Sumian, Ute Gravemann, Axel Seltsam, Helen M Faddy
BACKGROUND: Zika virus (ZIKV) has emerged as a potential threat to transfusion safety worldwide. Pathogen inactivation is one approach to manage this risk. In this study, the efficacy of the THERAFLEX UV-Platelets system and THERAFLEX MB-Plasma system to inactivate ZIKV in platelet concentrates (PCs) and plasma was investigated. STUDY DESIGN AND METHODS: PCs spiked with ZIKV were treated with the THERAFLEX UV-Platelets system at 0.05, 0.10, 0.15, and 0.20 J/cm(2) UVC...
July 17, 2017: Transfusion
https://www.readbyqxmd.com/read/28714229/implementing-a-protocol-to-optimize-blood-use-in-a-cardiac-surgery-service-results-of-a-pre-post-analysis-and-the-impact-of-high-volume-blood-users
#18
Juan B Grau, Jacqueline H Fortier, Cyrus Kuschner, Giovanni Ferrari, Mariano E Brizzio, Alex Zapolanski, Richard E Shaw
BACKGROUND: Blood transfusions are a common and costly intervention for cardiac surgery patients. Evidence suggests that a more restrictive transfusion strategy may reduce costs and transfusion-related complications without increasing perioperative morbidity and mortality. STUDY DESIGN AND METHODS: A transfusion-limiting protocol was developed and implemented in a cardiovascular surgery unit. Over a 5-year period, data were collected on patient characteristics, procedures, utilization of blood products, morbidity, and mortality, and these were compared before and after the protocol was implemented...
July 16, 2017: Transfusion
https://www.readbyqxmd.com/read/28714065/genotyping-by-sequencing-defines-independent-novel-rhd-variants-for-an-antenatal-patient-and-a-blood-donor
#19
Genghis H Lopez, Eunike C McGowan, Jennifer A Condon, Elizna M Schoeman, Glenda M Millard, Helen O'Brien, Eileen V Roulis, Gorka Ochoa-Garay, Yew-Wah Liew, Robert L Flower, Catherine A Hyland
No abstract text is available yet for this article.
July 16, 2017: Transfusion
https://www.readbyqxmd.com/read/28707410/treatment-of-an-acquired-factor-xiii-inhibitor-in-an-adolescent-with-systemic-lupus-erythematosus-and-renal-failure
#20
Cara A Rabik, Meredith A Atkinson, Sangeeta Sule, John J Strouse
BACKGROUND: Factor (F)XIII deficiency is a rare inherited bleeding disorder, but can also be acquired due to the development of inhibitors. CASE REPORT: A 17-year-old female with systemic lupus erythematosus and end-stage kidney disease secondary to Class IV lupus nephritis developed spontaneous subcutaneous and muscular hematomas and delayed major bleeding after invasive procedures. She had abnormal kaolin thromboelastography (kTEG; decreased maximal amplitude, representative of clot strength) initially attributed to thrombocytopenia and uremic platelet dysfunction, but her FXIII activity was undetectable, and a high-titer antibody against FXIII was identified...
July 13, 2017: Transfusion
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