Time filter

Source Type

Cambridge, United Kingdom

Stanworth S.J.,University of Oxford | Stanworth S.J.,NHSBT MRC Clinical Studies Unit | Estcourt L.J.,University of Oxford | Estcourt L.J.,NHSBT MRC Clinical Studies Unit | And 5 more authors.
Transfusion | Year: 2014

Results Prespecified subgroup analysis found that the reduction in proportion of patients experiencing WHO Grade 2 to 4 bleeds (main trial outcome) seen in the prophylaxis arm was of greater magnitude in chemo/alloHSCT than autoHSCT patients (interaction p = 0.04). Analysis of secondary outcomes showed a shorter time to first bleeding episode with no prophylaxis in the chemo/alloHSCT group (hazard ratio, 1.84; 95% confidence interval CI, 1.21-2.79; p = 0.004) compared to the autoHSCT group (hazard ratio, 1.12; 95% CI, 0.85-1.48; p = 0.4; interaction p = 0.08). The increased number of days with Grade 2 to 4 bleeds with a no-prophylaxis policy was similar in chemo/alloHSCT (rate ratio, 1.89; 95% CI, 1.10-3.26) and in autoHSCT patients (rate ratio, 1.43; 95% CI, 1.04-1.97). Both subgroups showed significant reductions in PLT transfusions with a no-prophylaxis strategy.Conclusion There is evidence that the effectiveness of prophylactic PLT transfusions may differ between subgroups, with chemo/alloHSCT patients receiving prophylactic PLT transfusions appearing to show a greater reduction in bleeding outcomes compared to patients following a no-prophylaxis policy. © 2014 Crown copyright. This article Impact of Prophylactic Platelet Transfusions on Bleeding Events in Patients with Hematologic Malignancies: A Sub-group Analysis of a Randomised Trial was written by Stanworth, Estcourt, Llewelyn, Murphy, & Wood. It is published with the permission of the Controller of HMSO and the Queen's Printer for Scotland.Background A recent randomized trial compared a policy of no prophylaxis with a policy of prophylactic platelet (PLT) transfusions at counts of fewer than 10 × 109/L in patients with hematologic malignancies. The results suggested the effectiveness of prophylactic PLT transfusions may vary according to patient diagnosis and treatment plan.Study Design and Methods This article presents full subgroup analyses and compares treatment effects between autologous hematopoietic stem cell transplantation (autoHSCT; n = 421) and chemotherapy/allogeneic HSCT (chemo/alloHSCT; n = 179) patients. © 2014 AABB.

Campbell H.E.,University of Oxford | Estcourt L.J.,University of Oxford | Estcourt L.J.,NHSBT MRC Clinical Studies Unit | Stokes E.A.,University of Oxford | And 7 more authors.
Transfusion | Year: 2014

Background This cost analysis uses data from a randomized trial comparing a no prophylaxis versus prophylactic platelet (PLT) transfusion policy (counts <10 × 109/L) in adult patients with hematologic malignancies.Results are presented for all patients and separately for autologous hematopoietic stem cell transplantation (HSCT) (autoHSCT) and chemotherapy/allogeneic HSCT (chemo/alloHSCT) patients.Study Design and Methods Data were collected to 30 days on PLT and red blood cell (RBC) transfusions, major bleeds, serious adverse events, critical care, and hematology ward stay. Data were costed using 2011 to 2012 UK unit costs and converted into US$. Sensitivity analyses were performed on uncertain cost variables.Results Across the whole trial no prophylaxis saved costs compared to prophylaxis: -$1760 per patient (95% confidence interval [CI], -$3250 to -$249; p < 0.05). For autoHSCT patients there was no cost difference between arms: -$110 per patient (95% CI, -$1648 to $1565; p = 0.89). For chemo/alloHSCT patients no prophylaxis cost significantly less than prophylaxis: -$5686 per patient (95% CI, -$8580 to -$2853; p < 0.01). The cost impact of no prophylaxis differed significantly between subgroups. Sensitivity analyses varying daily treatment costs and ward stay for chemo/alloHSCT patients reduced cost differences to -$941 per patient (p = 0.21) across the whole trial and -$2927 per patient (p < 0.05) in chemo/alloHSCT subgroup. Conclusions It is unclear whether a no-prophylaxis policy saves costs overall. In chemo/alloHSCT patients cost savings are apparent but their magnitude is sensitive to a number of variables and must be considered alongside clinical data showing increased bleeding rates. In autoHSCT patients savings generated through lower PLT use in no-prophylaxis arm were offset by cost increases elsewhere, for example, additional RBC transfusions. Cost-effectiveness analyses of alternative PLT transfusion policies simultaneously considering costs and patient-reported outcomes are warranted. © 2014 AABB.

Massey E.,NHS Blood and Transplant | Massey E.,University of Bristol | Harding K.,NHS Blood and Transplant | Harding K.,University of Bristol | And 15 more authors.
Transfusion Medicine | Year: 2012

Objective/Aim: To evaluate the safety of transfusing pooled, whole blood-derived granulocytes in additive solution and plasma (GASP) in 30 recipients. Background: Demand for granulocytes in England has increased five-fold. With the advantages of reduced red cell, plasma and overall volume, GASP maintains function in vitro. Methods and Materials: Observations were recorded prior to and post transfusion. Increments were recorded at 1 h and the following morning. Leucocyte antibody screening was undertaken prior to and at 1-6 months following transfusion. Results: Thirty patients aged between 8 months and 68 years received 221 GASP in 148 transfusion episodes. GASP contained an average of 1·0 ×1010 granulocytes in 207 mL. Adults usually received two packs and children 10-20 mL kg-1. Children and adults received a median [interquartile range (IQR)] dose of 12·5 (9·1-25·3) and 19·7 (12·0-25·8) ×109 granulocytes per transfusion, respectively. There was one episode of transfusion-associated circulatory overload (TACO) in a patient with chronic cardiac failure following 600 mL of unpooled granulocytes, other fluids and one GASP. New leucocyte alloimmunisation occurred in 3/30 recipients 10%. No other significant reactions were reported. Median peripheral blood neutrophil increments at 1 h post transfusion were 0·06 (IQR, 0·01-0·17) in children and (0·03) (IQR, 0-0·16) in adults. Conclusion: GASP has a similar safety profile to other sources of granulocytes for patients with refractory infection or in need of secondary prophylactic transfusion. Further studies are required to clarify the role of GASP in the treatment of neutropenic patients. © 2012 The Authors. Transfusion Medicine © 2012 British Blood Transfusion Society.

Stanworth S.J.,NHS Blood and Transplant Oxford Radcliffe Hospitals Trust | Stanworth S.J.,University of Oxford | Stanworth S.J.,MRC Clinical Trials Unit | Stanworth S.J.,NHSBT MRC Clinical Studies Unit | And 51 more authors.
Transfusion Medicine Reviews | Year: 2010

Although considerable advances have been made in many aspects of platelet transfusion therapy in the last 30 years, some areas continue to provoke debate, including the use of prophylactic platelet transfusions for the prevention of thrombocytopenic bleeding in patients with bone marrow failure. We have designed a randomized controlled trial to compare prophylactic platelet use with a threshold of a platelet count of 10 × 109/L with no prophylaxis in adult thrombocytopenic patients with hematologic malignancies. The trial question is whether a no-prophylactic policy for the use of platelet transfusions in patients with hematologic malignancies is not inferior to a threshold prophylactic policy at 10 × 109/L, for bleeding at World Health Organization (WHO) grade 2, 3, or 4, up to 30 days from randomization. The primary outcome measure is the proportion of patients who have a significant clinical bleed, defined as WHO grade 2 or higher up to 30 days from randomization. Subsidiary clinical outcome measures include time to first bleed and a descriptive analysis of all severe bleeds. A bleeding assessment form is completed daily for all study subjects until day 30 from randomization. Minor modifications were made to the definitions at WHO grades 1 and 2 for petechiae and duration of nose bleeds, after piloting of the bleeding assessment forms. This study has been designed as a 2-stage randomized trial with an interim analysis planned after a minimum of 100 patients had been randomized and had completed their period of observation. Patients have initially been enrolled through 3 United Kingdom hematology centers. The interim analysis has been completed, and the results have confirmed a final sample size of 600 patients. Recruitment is now being extended to other centers in United Kingdom and Australia. Local research nurses are not blinded to treatment allocation, but a number of measures to reduce risk of assessment bias include repeated education around standard operating procedures, common definitions, and duplication of assessments. The expected completion date for the 5-year study is December 2011. © 2010 Elsevier Inc.

Discover hidden collaborations