BBTS JAMES BLUNDELL AWARD 2017 · Feasibility trial of Rejuvesol, RBC rejuvenating solution, in...
Transcript of BBTS JAMES BLUNDELL AWARD 2017 · Feasibility trial of Rejuvesol, RBC rejuvenating solution, in...
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BBTS JAMES BLUNDELLAWARD 2017
Getting the message across: turning data into stories
Lorna M Williamson
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Evidence-based medicine:‘Let my dataset change your mindset’
Hans Rosling, Statistician & Communicator
D. Non-analytic studies: case report, case series, expert opinion
C. Case control/cohort studies with low risk of bias: SHOT
B. Systematic reviews of case control/cohort studies
A. Randomised clinical trial OR systematic reviews of RCTs: CTU
Palmer K et al BMJ 2008; 337:1832
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Hello versus J of Statistics
1. Grab the audience’s attention: numbers or stories?
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Professor Sir David SpiegelhalterWinton Professor for the
Public Understanding of RiskUniversity of Cambridge
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1994: ‘Would you like to set up UK haemovigilance----?’
Dr Angela Robinson
Medical Director NBS England
[NOT ‘IN’]
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Dr Brian McClellandSNBTS
Prescription/blood sample from patient
Hospital blood bank
Collection from hospital storage site
Administration of blood to the patient
“Right blood, right patient,right time”
McClelland B, Phillips P. Errors in blood transfusion in Britain: survey of hospital haematology depts. BMJ 1994:1205-6.
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Professor Sir John LilleymanChair, Inaugural SHOT Steering Group meetingRoyal College of Pathologists, December 1995
SHOT was affiliated to Royal College of Pathologists
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SHOT launch: 1 October 1996
Williamson LM, Heptonstall J, Soldan K. BMJ. 1996 Nov 16;313(7067):1221-2.
Thanks to Liz Love, Hannah Cohen, Hilary Jones.
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The first SHOT report 1996-97169 initial reports (141 completed) from 94 of 424 hospitals
169 cases where initial reports received Distribution of errors in completed reports (n=63)
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2. Adjust your content to the audience.
RCPath at House of Commons
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Using SHOT data to prevent transfusion-related acute lung injury
• Leading cause of mortality and major morbidity 1996-2003
• Caused by HLA/HNA antibodies • Main source is donor plasma:
o Female donors with a history of pregnancy: antibodies in 10-15% (MacLennan & Navarrete)
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TRALI – relative risk from different components 1996-2003
Red cells Cryo FFP PlateletsTRALI cases 33 2 31 27Components issued 18,370,00
0634,000 2,515,00
01,842,00
0
Risk/component issued
1:556,000 1:317,000
1:81,000 1:68 000
Relative riskcompared to red cells
1 2 7 8
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A simple, low cost intervention to reduce the risk of TRALI
October 2003:
Plasma packs marked M and F
M plasma for FFP
F plasma discarded
‘No more questions for donors please’
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2 2
4 43
7 7
32
1 10
21 1
9
14
16
18
13
33
36
23 23
10
24
17
21
15
12
0
5
10
15
20
25
30
35
1996/97 1997/98 1998/99 1999/00 2000/01 2001/02* 2003 2004 2005 2006 2007 2008 2009 2010 2011
Num
ber o
f rep
orts
Year of report
Number of deaths
Suspected TRALI reports
Chapman CE, Stainsby D, Jones H, Love E, Massey E, Win N, Navarrete C, Lucas G, Soni N, Morgan C, Choo L, Cohen H, Williamson LM; Serious Hazards of Transfusion Steering Group. Transfusion 2009; 49: 440-452.
Decision to use male donors for FFP
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James Blundell 1790-1878
MD Edinburgh 1813
First transfusion 1828
N = 10 transfusions in total (80 years before blood groups!)
Success rate = 50%
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LW to NBS Cambridge Issue Department: ‘Please send a box of Pall filters to Kings Lynn blood bank’.
1992: RCT of Pall bedside leucoreductionfilters in preventing HLA alloimmunisation in haematology patients
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Kings Lynn Blood Bank to LW:‘Why have you sent us these oil filters for car engines?’
RCT of Pall bedside leucoreduction filters in preventing HLA alloimmunisation
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3. Avoid words with more than one meaning
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RCT of Pall bedside leucoreduction filters in preventing HLA alloimmunisation: Conclusions1. Bedside post-storage leucoreduction doesnot prevent HLA alloimmunisation
2. Negative trials can get into good journals if the question is important(Williamson LM, Wimperis JZ, Williamson P, Copplestone JA, Gooi HC, Morgenstern GR, Norfolk DR. Blood 1994:10:3018-3025)
3. ‘Marcela, we need a clinical trials unit’- Williamson & Murphy 1998
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www.nhsbt.nhs.uk/clinical-trials-unit
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PlaNeT-2 A randomised controlled trial to compare two different platelet count thresholds for prophylactic platelet transfusion to preterm neonates
A comparison of HLA epitope-matched with standard HLA-matched prophylactic platelet transfusions in raising the platelet count increment in alloimmunised thrombocytopenic patients with aplastic anaemia, myelodysplastic syndrome or acute myeloid leukaemia: a double-blind randomised cross-over trial
TREATT A double blind, randomised controlled trial evaluating the safety and efficacy of tranexamic acid in patients with haematological malignancies with severe thrombocytopenia
A multi-centre, randomised, double blind, placebo controlled trial evaluating the effects of early administration of fibrinogen concentrate in adults with major traumatic haemorrhage
REDDS Red blood cell transfusion thresholds and QoL in myelodysplastic syndromes: a pilot, feasibility study
EVNP A multicentre, randomised, open label trial comparing graft function and survival following transplant of kidneys preserved using cold storage alone vs cold storage plus 1 hour normothermic perfusion. Collaboration with University of Cambridge
DRIVE A placebo-controlled single-blind, randomised feasibility trial of Desmopressin (DDAVP) in critical illness prior to procedures
RESTORE A cross-over trial comparing recovery and survival of manufactured RBCs with standard donated RBCs in healthy volunteers
REAL A feasibility cross-over randomised controlled trial comparing restrictive versus liberal red cell transfusion strategies in adult patients with acute myeloid leukaemia receiving intensive chemotherapy
REPAST A feasibility randomised controlled trial comparing restrictive versus liberal red cell transfusion strategies in children undergoing allogeneic haematopoietic stem cell transplant (HSCT)
REDJUVENATE Feasibility trial of Rejuvesol, RBC rejuvenating solution, in patients undergoing cardiac surgery. Collaboration with University of Leicester.
A multi-centre, randomised, controlled trial evaluating the effects of early administration of cryoprecipitate in adults with major traumatic haemorrhage. Collaboration with Barts and The London Hospital.
ITOPS Improving Transplant Opportunities for Patients who are Sensitised (ITOPS) – a pilot, open label, randomised, controlled phase III trial in kidney transplantation
ISOC-3 A pilot randomised trial of diagnostic strategies for acquired coagulopathy in critical care and Core Outcome Set development
Pre-Implantation trial evaluating the effect of providing an urgent Histopathology result service on the rate of transplantation of kidneys from donors aged over 60 years.
CTU: Current activity
13 studies incl 3 of organs
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2007 TAPS RCT: Does pre-operative transfusion in sickle cell disease increase or decrease the overall incidence of significant
peri-operative complications?
Consenting patients Hb≥6.5g/dL
≤28 days and >24hrs before low/medium risk surgery
Randomise & baseline observations
Arm A: No transfusion Arm B: Red cell transfusion
B1: Hb <9.0g/dL
Top up transfusion
B2: Hb ≥9.0g/dL
Partial exchange transfusion
Elective surgery (day 0) Recommended Care Protocol
Trial Follow-up Complications up to and including 30 days post-operatively
Red cell alloimmunisation at 3 months
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TAPS Trial progress
• Nov 2007: Trial opened • Sept 2010: 1st interim analysis (n = 40)
- An imbalance in patients with Serious Adverse Events was noted
• Feb 2011: (n = 70 enrolled)- Imbalance in patients with SAEs more marked - Data Monitoring Committee request unscheduled interim analysis (n = 61)
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Trial ArmArm A –No Pre-operative blood transfusion
Arm B –Pre-operative blood transfusion
Overall
Patients Recruited 33 34 67
Patients with significant complications 13 (39.3%) 5 (14.7%)
18 (26.9%)OR 3.8 (CI 1.2-12.2)
p 0.027
Patients with SAEs 10 (30.3%) 1 (2.9%)
11 (16.4%)27.4% difference
(CI 10.6-44.0)P 0.003
Patients with Acute Chest Syndrome 9 (27.3%) 1 (2.9%) 10 (14.9%)
TAPS: Primary Outcome and Serious Adverse Events (SAEs)
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TAPS: the only way is ethics
• Trial Steering Committee closed TAPS early in March 2011• Conclusion: Pre-operative transfusion should be offered to patients
with HbSS having medium risk surgery and be considered in other genotypes and in low risk surgery
• Trials confirming current practice are still important
Howard J, Malfroy M, Llewelyn C, Choo L, Hodge R, Johnson T, Purolit S, Rees DC, Tillyer L, Walker I, Fijnvandraat K, Kirby-Allen M, Davies SC, Williamson LM. Lancet 2013: 381:930.
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Population
Group 1
Group 2
Outcome
Outcome
Intervention: no prophylaxis
No intervention: prophylaxis
4. Pictures can be helpful----TOPPS: Trial of platelet prophylaxis vs no prophylaxis
Stanworth et al NEJM9th May 2013
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----but not always.
(guess which Royal College)
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PROMPT RCT: Do differences in donor platelet function in lab tests affect patient outcomes after
platelet transfusion?
-2 0 20
20
40
60
Co
un
t
Standardised Residuals of Logit Transformed Data
P-selectin, ADPFibrinogen, ADP
P-selectin, XL-CRPFibrinogen, XL-CRP
-2 0 20
20
40
60
Co
un
t
Standardised Residuals of Logit Transformed Data
P-selectin, ADPFibrinogen, ADP
P-selectin, XL-CRPFibrinogen, XL-CRP
Cambridge Platelet Function Cohort – n=506Jones et al. JTH 2007; 1756-1765
≠ ?
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n=15n=16
aCI aCI & CCI
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PROMPT results – platelet count increments at 1 and 24 hrs
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PROMPT: Conclusions• Differences in donor platelet responsiveness do
not affect count increments, bleeding scores or component usage in recipients of prophylactic platelets
• Might patients who are actively bleeding benefit from PC from a high responder donor?
• ‘Negative’ trials, if well performed, can still get into top journals
• Clinical fellows are worth their weight in gold- so are clinical scientists
Kelly AM, Gardner SF, Foukaneli T, Godec TR, Herbert N, Kahan BC, Deary A, Bakrania L, Llewelyn C, Ouwehand WH, Williamson LM, Cardigan RA. Blood 2017;130:214
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5. The Great British Fake Off
Red blood cells and plasma made to GCP (Good Culinary Practice)
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6. Adults love ‘Make & Take’.
Antigens, antibodies and leucocytes
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Science Museum Lates for adults:
Making antibodies to viruses
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Pathology Summer School for undergraduates
7. Get them young
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--and younger--
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Schools Science Conference
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----and even younger----
Clotting, transfusion and blood groups:Bellbird Primary School Science Club,Sawston
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8. Link science and artRCPath Art Competition
‘Animals in pathology’
Under 8s winner
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Hoarding, new RCPathbuilding site, AlieStreet, Aldgate.
Thanks to English Catholic Martyrs Primary School and Dr Lizzie Burns.
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Making bugs at the Oxford Science Festival 2016with Dr Lizzie Burns
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9. Use animals.
Transfusion from the canine blood bank.
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10. Hook up with celebrities in unusual placesLow Allergy Garden, Chelsea Flower Show
Which is RCPath President and which is Lynda Snell ?
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Thanks to many friends & colleagues!
Willem Ouwehand
Rebecca Cardigan
Jean-Pierre Allain
Mike MurphyMarcela Contreras
Nick Watkins
Sheila MacLennan
Cedric Ghaevert